diff --git a/blockchain/chainio.go b/blockchain/chainio.go
index d63f26bab2..5f68ea3434 100644
--- a/blockchain/chainio.go
+++ b/blockchain/chainio.go
@@ -12,7 +12,7 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
-	"sort"
+	"sync"
 	"time"
 
 	"github.com/decred/dcrd/blockchain/stake/v4"
@@ -28,7 +28,7 @@ import (
 const (
 	// currentDatabaseVersion indicates what the current database
 	// version is.
-	currentDatabaseVersion = 8
+	currentDatabaseVersion = 9
 
 	// currentBlockIndexVersion indicates what the current block index
 	// database version.
@@ -74,11 +74,11 @@ var (
 
 	// spendJournalBucketName is the name of the db bucket used to house
 	// transactions outputs that are spent in each block.
-	spendJournalBucketName = []byte("spendjournalv2")
+	spendJournalBucketName = []byte("spendjournalv3")
 
 	// utxoSetBucketName is the name of the db bucket used to house the unspent
 	// transaction output set.
-	utxoSetBucketName = []byte("utxosetv2")
+	utxoSetBucketName = []byte("utxosetv3")
 
 	// blockIndexBucketName is the name of the db bucket used to house the block
 	// index which consists of metadata for all known blocks both in the main
@@ -249,15 +249,6 @@ func readDeserializeSizeOfMinimalOutputs(serialized []byte) (int, error) {
 	return offset, nil
 }
 
-// ConvertUtxosToMinimalOutputs converts the contents of a UTX to a series of
-// minimal outputs. It does this so that these can be passed to stake subpackage
-// functions, where they will be evaluated for correctness.
-func ConvertUtxosToMinimalOutputs(entry *UtxoEntry) []*stake.MinimalOutput {
-	minOuts, _ := deserializeToMinimalOutputs(entry.stakeExtra)
-
-	return minOuts
-}
-
 // -----------------------------------------------------------------------------
 // The block index consists of an entry for every known block.  It consists of
 // information such as the block header and information about votes.
@@ -481,7 +472,7 @@ func dbMaybeStoreBlock(dbTx database.Tx, block *dcrutil.Block) error {
 // The serialized format is:
 //
 //   [<flags><script version><compressed pk script>],...
-//   OPTIONAL: [<txVersion>]
+//   OPTIONAL: <ticket min outs>
 //
 //   Field                Type           Size
 //   flags                VLQ            byte
@@ -489,55 +480,61 @@ func dbMaybeStoreBlock(dbTx database.Tx, block *dcrutil.Block) error {
 //   pkScript             VLQ+[]byte     variable
 //
 //   OPTIONAL
-//     txVersion          VLQ            variable
-//     stakeExtra         []byte         variable
-//
-// The serialized flags code format is:
-//   bit  0   - containing transaction is a coinbase
-//   bit  1   - containing transaction has an expiry
-//   bits 2-4 - transaction type
-//   bit  5   - unused
-//   bit  6   - is fully spent
-//   bit  7   - unused
+//     ticketMinOuts      []byte         variable
 //
-// The stake extra field contains minimally encoded outputs for all
-// consensus-related outputs in the stake transaction. It is only
-// encoded for tickets.
+// The serialized flags format is:
+//   bit  0     - containing transaction is a coinbase
+//   bit  1     - containing transaction has an expiry
+//   bits 2-5   - transaction type
+//   bits 6-7   - unused
 //
-//   NOTE: The transaction version and flags are only encoded when the spent
-//   txout was the final unspent output of the containing transaction.
-//   Otherwise, the header code will be 0 and the version is not serialized at
-//   all. This is done because that information is only needed when the utxo
-//   set no longer has it.
+// The ticket min outs field contains minimally encoded outputs for all outputs
+// of a ticket transaction. It is only encoded for ticket submission outputs.
 //
-// Example:
-//   TODO
 // -----------------------------------------------------------------------------
 
 // spentTxOut contains a spent transaction output and potentially additional
 // contextual information such as whether or not it was contained in a coinbase
-// transaction, the txVersion of the transaction it was contained in, and which
-// block height the containing transaction was included in.  As described in
-// the comments above, the additional contextual information will only be valid
-// when this spent txout is spending the last unspent output of the containing
-// transaction.
+// transaction, whether or not the containing transaction has an expiry, and the
+// transaction type.
 //
 // The struct is aligned for memory efficiency.
 type spentTxOut struct {
-	pkScript   []byte // The public key script for the output.
-	stakeExtra []byte // Extra information for the staking system.
-
-	amount        int64        // The amount of the output.
-	txType        stake.TxType // The stake type of the transaction.
-	height        uint32       // Height of the block containing the tx.
-	index         uint32       // Index in the block of the transaction.
-	scriptVersion uint16       // The version of the scripting language.
-	txVersion     uint16       // The version of creating tx.
-
-	txFullySpent bool // Whether or not the transaction is fully spent.
-	isCoinBase   bool // Whether creating tx is a coinbase.
-	hasExpiry    bool // The expiry of the creating tx.
-	compressed   bool // Whether or not the script is compressed.
+	amount   int64
+	pkScript []byte
+
+	// ticketMinOuts is the minimal outputs for the ticket transaction that the
+	// output is contained in.  This is only stored in ticket submission outputs
+	// and is nil for all other output types.
+	ticketMinOuts *ticketMinimalOutputs
+
+	blockHeight   uint32
+	blockIndex    uint32
+	scriptVersion uint16
+
+	// packedFlags contains additional info about the output as defined by
+	// txOutFlags.  This approach is used in order to reduce memory usage since
+	// there will be a lot of these in memory.
+	packedFlags txOutFlags
+}
+
+// IsCoinBase returns whether or not the output was contained in a coinbase
+// transaction.
+func (stxo *spentTxOut) IsCoinBase() bool {
+	return stxo.packedFlags&txOutFlagCoinBase == txOutFlagCoinBase
+}
+
+// HasExpiry returns whether or not the output was contained in a transaction
+// that included an expiry.
+func (stxo *spentTxOut) HasExpiry() bool {
+	return stxo.packedFlags&txOutFlagHasExpiry == txOutFlagHasExpiry
+}
+
+// TransactionType returns the type of the transaction that the output is
+// contained in.
+func (stxo *spentTxOut) TransactionType() stake.TxType {
+	txType := (stxo.packedFlags & txOutFlagTxTypeBitmask) >> txOutFlagTxTypeShift
+	return stake.TxType(txType)
 }
 
 // spentTxOutSerializeSize returns the number of bytes it would take to
@@ -546,21 +543,16 @@ type spentTxOut struct {
 // because they're already encoded into the transactions, so skip them when
 // determining the serialization size.
 func spentTxOutSerializeSize(stxo *spentTxOut) int {
-	flags := encodeFlags(stxo.isCoinBase, stxo.hasExpiry, stxo.txType,
-		stxo.txFullySpent)
+	flags := encodeFlags(stxo.IsCoinBase(), stxo.HasExpiry(),
+		stxo.TransactionType())
 	size := serializeSizeVLQ(uint64(flags))
 
-	// false below indicates that the txOut does not specify an amount.
+	const hasAmount = false
 	size += compressedTxOutSize(uint64(stxo.amount), stxo.scriptVersion,
-		stxo.pkScript, currentCompressionVersion, stxo.compressed, false)
-
-	// The transaction was fully spent, so we need to store some extra
-	// data for UTX resurrection.
-	if stxo.txFullySpent {
-		size += serializeSizeVLQ(uint64(stxo.txVersion))
-		if stxo.txType == stake.TxTypeSStx {
-			size += len(stxo.stakeExtra)
-		}
+		stxo.pkScript, currentCompressionVersion, hasAmount)
+
+	if stxo.ticketMinOuts != nil {
+		size += len(stxo.ticketMinOuts.data)
 	}
 
 	return size
@@ -571,94 +563,67 @@ func spentTxOutSerializeSize(stxo *spentTxOut) int {
 // be at least large enough to handle the number of bytes returned by the
 // spentTxOutSerializeSize function or it will panic.
 func putSpentTxOut(target []byte, stxo *spentTxOut) int {
-	flags := encodeFlags(stxo.isCoinBase, stxo.hasExpiry, stxo.txType,
-		stxo.txFullySpent)
+	flags := encodeFlags(stxo.IsCoinBase(), stxo.HasExpiry(),
+		stxo.TransactionType())
 	offset := putVLQ(target, uint64(flags))
 
-	// false below indicates that the txOut does not specify an amount.
+	const hasAmount = false
 	offset += putCompressedTxOut(target[offset:], 0, stxo.scriptVersion,
-		stxo.pkScript, currentCompressionVersion, stxo.compressed, false)
-
-	// The transaction was fully spent, so we need to store some extra
-	// data for UTX resurrection.
-	if stxo.txFullySpent {
-		offset += putVLQ(target[offset:], uint64(stxo.txVersion))
-		if stxo.txType == stake.TxTypeSStx {
-			copy(target[offset:], stxo.stakeExtra)
-			offset += len(stxo.stakeExtra)
-		}
+		stxo.pkScript, currentCompressionVersion, hasAmount)
+
+	if stxo.ticketMinOuts != nil {
+		copy(target[offset:], stxo.ticketMinOuts.data)
+		offset += len(stxo.ticketMinOuts.data)
 	}
+
 	return offset
 }
 
 // decodeSpentTxOut decodes the passed serialized stxo entry, possibly followed
 // by other data, into the passed stxo struct.  It returns the number of bytes
 // read.
-//
-// Since the serialized stxo entry does not contain the height, version, or
-// coinbase flag of the containing transaction when it still has utxos, the
-// caller is responsible for passing in the containing transaction version in
-// that case.  The provided version is ignore when it is serialized as a part of
-// the stxo.
-//
-// An error will be returned if the version is not serialized as a part of the
-// stxo and is also not provided to the function.
-func decodeSpentTxOut(serialized []byte, stxo *spentTxOut, amount int64, height uint32, index uint32) (int, error) {
+func decodeSpentTxOut(serialized []byte, stxo *spentTxOut, amount int64,
+	height uint32, index uint32, txOutIndex uint32) (int, error) {
+
 	// Deserialize the flags.
-	flags, offset := deserializeVLQ(serialized)
-	if offset == 0 {
-		return 0, errDeserialize("unexpected end of data during " +
-			"decoding (flags)")
+	flags, bytesRead := deserializeVLQ(serialized)
+	offset := bytesRead
+	if offset >= len(serialized) {
+		return offset, errDeserialize("unexpected end of data after flags")
 	}
+	isCoinBase, hasExpiry, txType := decodeFlags(txOutFlags(flags))
 
 	// Decode the compressed txout. We pass false for the amount flag,
 	// since in Decred we only need pkScript at most due to fraud proofs
 	// already storing the decompressed amount.
-	_, scriptVersion, compScript, bytesRead, err :=
-		decodeCompressedTxOut(serialized[offset:], currentCompressionVersion,
-			false)
+	_, scriptVersion, script, bytesRead, err :=
+		decodeCompressedTxOut(serialized[offset:], currentCompressionVersion, false)
 	offset += bytesRead
 	if err != nil {
 		return offset, errDeserialize(fmt.Sprintf("unable to decode "+
 			"txout: %v", err))
 	}
-	stxo.scriptVersion = scriptVersion
-	stxo.amount = amount
-	stxo.pkScript = compScript
-	stxo.compressed = true
-	stxo.height = height
-	stxo.index = index
-
-	// Deserialize the containing transaction if the flags indicate that
-	// the transaction has been fully spent.
-	if decodeFlagsFullySpent(byte(flags)) {
-		isCoinBase, hasExpiry, txType, _ := decodeFlags(byte(flags))
-
-		stxo.isCoinBase = isCoinBase
-		stxo.hasExpiry = hasExpiry
-		stxo.txType = txType
-		stxo.txFullySpent = true
-
-		txVersion, bytesRead := deserializeVLQ(serialized[offset:])
-		if bytesRead == 0 {
-			return offset, errDeserialize("unexpected end of " +
-				"data during decoding (tx version)")
-		}
-		offset += bytesRead
 
-		stxo.txVersion = uint16(txVersion)
+	// Populate the stxo.
+	stxo.amount = amount
+	stxo.pkScript = script
+	stxo.blockHeight = height
+	stxo.blockIndex = index
+	stxo.scriptVersion = scriptVersion
+	stxo.packedFlags = encodeFlags(isCoinBase, hasExpiry, txType)
 
-		if stxo.txType == stake.TxTypeSStx {
-			sz, err := readDeserializeSizeOfMinimalOutputs(serialized[offset:])
-			if err != nil {
-				return offset + sz, errDeserialize(fmt.Sprintf("unable to decode "+
-					"ticket outputs: %v", err))
-			}
-			stakeExtra := make([]byte, sz)
-			copy(stakeExtra, serialized[offset:offset+sz])
-			stxo.stakeExtra = stakeExtra
-			offset += sz
+	// Copy the minimal outputs if this was a ticket submission output.
+	if isTicketSubmissionOutput(txType, txOutIndex) {
+		sz, err := readDeserializeSizeOfMinimalOutputs(serialized[offset:])
+		if err != nil {
+			return offset + sz, errDeserialize(fmt.Sprintf("unable to decode "+
+				"ticket outputs: %v", err))
+		}
+		stxo.ticketMinOuts = &ticketMinimalOutputs{
+			data: make([]byte, sz),
 		}
+		copy(stxo.ticketMinOuts.data, serialized[offset:offset+sz])
+		offset += sz
 	}
 
 	return offset, nil
@@ -717,25 +682,8 @@ func deserializeSpendJournalEntry(serialized []byte, txns []*wire.MsgTx, isTreas
 			stxo := &stxos[stxoIdx]
 			stxoIdx--
 
-			// Get the transaction version for the stxo based on
-			// whether or not it should be serialized as a part of
-			// the stxo.  Recall that it is only serialized when the
-			// stxo spends the final utxo of a transaction.  Since
-			// they are deserialized in reverse order, this means
-			// the first time an entry for a given containing tx is
-			// encountered that is not already in the utxo view it
-			// must have been the final spend and thus the extra
-			// data will be serialized with the stxo.  Otherwise,
-			// the version must be pulled from the utxo entry.
-			//
-			// Since the view is not actually modified as the stxos
-			// are read here and it's possible later entries
-			// reference earlier ones, an inflight map is maintained
-			// to detect this case and pull the tx version from the
-			// entry that contains the version information as just
-			// described.
 			n, err := decodeSpentTxOut(serialized[offset:], stxo, txIn.ValueIn,
-				txIn.BlockHeight, txIn.BlockIndex)
+				txIn.BlockHeight, txIn.BlockIndex, txIn.PreviousOutPoint.Index)
 			offset += n
 			if err != nil {
 				return nil, errDeserialize(fmt.Sprintf("unable "+
@@ -850,181 +798,155 @@ func dbRemoveSpendJournalEntry(dbTx database.Tx, blockHash *chainhash.Hash) erro
 
 // -----------------------------------------------------------------------------
 // The unspent transaction output (utxo) set consists of an entry for each
-// transaction which contains a utxo serialized using a format that is highly
-// optimized to reduce space using domain specific compression algorithms.  This
-// format is a slightly modified version of the format used in Bitcoin Core.
+// unspent output using a format that is optimized to reduce space using domain
+// specific compression algorithms.  This format is a slightly modified version
+// of the format used in Bitcoin Core.
 //
-// The serialized format is:
+// Each entry is keyed by an outpoint as specified below.  It is important to
+// note that the key encoding uses a VLQ, which employs an MSB encoding so
+// iteration of utxos when doing byte-wise comparisons will produce them in
+// order.
 //
-//   <version><height><header code><unspentness bitmap>[<compressed txouts>,...]
+// The serialized key format is:
 //
-//   Field                 Type     Size
-//   transaction version   VLQ      variable
-//   block height          VLQ      variable
-//   block index           VLQ      variable
-//   flags                 VLQ      variable (currently 1 byte)
-//   header code           VLQ      variable
-//   unspentness bitmap    []byte   variable
-//   compressed txouts
+//   <hash><output index><tree>
+//
+//   Field                Type             Size
+//   hash                 chainhash.Hash   chainhash.HashSize
+//   output index         VLQ              variable
+//   tree                 VLQ              variable
+//
+// The serialized value format is:
+//
+//   <block height><block index><flags><compressed txout>
+//   OPTIONAL: [<ticket min outs>]
+//
+//   Field                Type     Size
+//   block height         VLQ      variable
+//   block index          VLQ      variable
+//   flags                VLQ      variable
+//   compressed txout
 //     compressed amount   VLQ      variable
 //     compressed version  VLQ      variable
 //     compressed script   []byte   variable
-//   stakeExtra            []byte   variable
-//
-// The serialized flags code format is:
-//   bit  0   - containing transaction is a coinbase
-//   bit  1   - containing transaction has an expiry
-//   bits 2-4 - transaction type
-//   bit  5   - unused
-//   bit  6   - is fully spent
-//   bit  7   - unused
 //
-// The serialized header code format is:
-//   bit 0 - output zero is unspent
-//   bit 1 - output one is unspent
-//   bits 2-x - number of bytes in unspentness bitmap.  When both bits 1 and 2
-//     are unset, it encodes N-1 since there must be at least one unspent
-//     output.
+//   OPTIONAL
+//     ticketMinOuts      []byte         variable
 //
-// The rationale for the header code scheme is as follows:
-//   - Transactions which only pay to a single output and a change output are
-//     extremely common, thus an extra byte for the unspentness bitmap can be
-//     avoided for them by encoding those two outputs in the low order bits.
-//   - Given it is encoded as a VLQ which can encode values up to 127 with a
-//     single byte, that leaves 4 bits to represent the number of bytes in the
-//     unspentness bitmap while still only consuming a single byte for the
-//     header code.  In other words, an unspentness bitmap with up to 120
-//     transaction outputs can be encoded with a single-byte header code.
-//     This covers the vast majority of transactions.
-//   - Encoding N-1 bytes when both bits 0 and 1 are unset allows an additional
-//     8 outpoints to be encoded before causing the header code to require an
-//     additional byte.
+// The serialized flags format is:
+//   bit  0     - containing transaction is a coinbase
+//   bit  1     - containing transaction has an expiry
+//   bits 2-5   - transaction type
+//   bits 6-7   - unused
 //
-// The stake extra field contains minimally encoded outputs for all
-// consensus-related outputs in the stake transaction. It is only
-// encoded for tickets.
+// The ticket min outs field contains minimally encoded outputs for all outputs
+// of a ticket transaction. It is only encoded for ticket submission outputs.
 //
-// Example 1: TODO
 // -----------------------------------------------------------------------------
 
-// utxoEntryHeaderCode returns the calculated header code to be used when
-// serializing the provided utxo entry and the number of bytes needed to encode
-// the unspentness bitmap.
-func utxoEntryHeaderCode(entry *UtxoEntry, highestOutputIndex uint32) (uint64, int, error) {
-	// The first two outputs are encoded separately, so offset the index
-	// accordingly to calculate the correct number of bytes needed to encode
-	// up to the highest unspent output index.
-	numBitmapBytes := int((highestOutputIndex + 6) / 8)
-
-	// As previously described, one less than the number of bytes is encoded
-	// when both output 0 and 1 are spent because there must be at least one
-	// unspent output.  Adjust the number of bytes to encode accordingly and
-	// encode the value by shifting it over 2 bits.
-	output0Unspent := !entry.IsOutputSpent(0)
-	output1Unspent := !entry.IsOutputSpent(1)
-	var numBitmapBytesAdjustment int
-	if !output0Unspent && !output1Unspent {
-		if numBitmapBytes == 0 {
-			return 0, 0, AssertError("attempt to serialize utxo " +
-				"header for fully spent transaction")
-		}
-		numBitmapBytesAdjustment = 1
-	}
-	headerCode := uint64(numBitmapBytes-numBitmapBytesAdjustment) << 2
+// maxUint32VLQSerializeSize is the maximum number of bytes a max uint32 takes
+// to serialize as a VLQ.
+var maxUint32VLQSerializeSize = serializeSizeVLQ(1<<32 - 1)
+
+// maxUint8VLQSerializeSize is the maximum number of bytes a max uint8 takes to
+// serialize as a VLQ.
+var maxUint8VLQSerializeSize = serializeSizeVLQ(1<<8 - 1)
+
+// outpointKeyPool defines a concurrent safe free list of byte slices used to
+// provide temporary buffers for outpoint database keys.
+var outpointKeyPool = sync.Pool{
+	New: func() interface{} {
+		b := make([]byte, chainhash.HashSize+maxUint32VLQSerializeSize+
+			maxUint8VLQSerializeSize)
+		return &b // Pointer to slice to avoid boxing alloc.
+	},
+}
 
-	// Set the output 0 and output 1 bits in the header code
-	// accordingly.
-	if output0Unspent {
-		headerCode |= 0x01 // bit 0
+// outpointKey returns a key suitable for use as a database key in the utxo set
+// while making use of a free list.  A new buffer is allocated if there are not
+// already any available on the free list.  The returned byte slice should be
+// returned to the free list by using the recycleOutpointKey function when the
+// caller is done with it _unless_ the slice will need to live for longer than
+// the caller can calculate such as when used to write to the database.
+func outpointKey(outpoint wire.OutPoint) *[]byte {
+	// A VLQ employs an MSB encoding, so they are useful not only to reduce the
+	// amount of storage space, but also so iteration of utxos when doing
+	// byte-wise comparisons will produce them in order.
+	key := outpointKeyPool.Get().(*[]byte)
+	idx := uint64(outpoint.Index)
+	tree := uint64(outpoint.Tree)
+	*key = (*key)[:chainhash.HashSize+serializeSizeVLQ(idx)+
+		serializeSizeVLQ(tree)]
+	copy(*key, outpoint.Hash[:])
+	offset := chainhash.HashSize
+	offset += putVLQ((*key)[offset:], idx)
+	putVLQ((*key)[offset:], tree)
+	return key
+}
+
+// outpointFromKey returns the outpoint that the provided serialized key
+// represents.
+func outpointFromKey(serialized []byte) (*wire.OutPoint, error) {
+	if chainhash.HashSize >= len(serialized) {
+		return nil, errDeserialize("unexpected length for serialized outpoint key")
 	}
-	if output1Unspent {
-		headerCode |= 0x02 // bit 1
+
+	// Deserialize the hash.
+	var hash chainhash.Hash
+	copy(hash[:], serialized[:chainhash.HashSize])
+	offset := chainhash.HashSize
+
+	// Deserialize the index.
+	idx, bytesRead := deserializeVLQ(serialized[offset:])
+	offset += bytesRead
+	if offset >= len(serialized) {
+		return nil, errDeserialize("unexpected end of data after index")
 	}
 
-	return headerCode, numBitmapBytes, nil
+	// Deserialize the tree.
+	tree, _ := deserializeVLQ(serialized[offset:])
+
+	return &wire.OutPoint{Hash: hash, Index: uint32(idx), Tree: int8(tree)}, nil
+}
+
+// recycleOutpointKey puts the provided byte slice, which should have been
+// obtained via the outpointKey function, back on the free list.
+func recycleOutpointKey(key *[]byte) {
+	outpointKeyPool.Put(key)
 }
 
 // serializeUtxoEntry returns the entry serialized to a format that is suitable
 // for long-term storage.  The format is described in detail above.
 func serializeUtxoEntry(entry *UtxoEntry) ([]byte, error) {
-	// Fully spent entries have no serialization.
-	if entry.IsFullySpent() {
+	// Spent entries have no serialization.
+	if entry.IsSpent() {
 		return nil, nil
 	}
 
-	// Determine the output order by sorting the sparse output index keys.
-	outputOrder := make([]int, 0, len(entry.sparseOutputs))
-	for outputIndex := range entry.sparseOutputs {
-		outputOrder = append(outputOrder, int(outputIndex))
-	}
-	sort.Ints(outputOrder)
-
-	// Encode the header code and determine the number of bytes the
-	// unspentness bitmap needs.
-	highIndex := uint32(outputOrder[len(outputOrder)-1])
-	headerCode, numBitmapBytes, err := utxoEntryHeaderCode(entry, highIndex)
-	if err != nil {
-		return nil, err
-	}
-
 	// Calculate the size needed to serialize the entry.
-	flags := encodeFlags(entry.isCoinBase, entry.hasExpiry, entry.txType, false)
-	size := serializeSizeVLQ(uint64(entry.txVersion)) +
-		serializeSizeVLQ(uint64(entry.height)) +
-		serializeSizeVLQ(uint64(entry.index)) +
+	const hasAmount = true
+	flags := encodeFlags(entry.IsCoinBase(), entry.HasExpiry(),
+		entry.TransactionType())
+	size := serializeSizeVLQ(uint64(entry.blockHeight)) +
+		serializeSizeVLQ(uint64(entry.blockIndex)) +
 		serializeSizeVLQ(uint64(flags)) +
-		serializeSizeVLQ(headerCode) + numBitmapBytes
-	for _, outputIndex := range outputOrder {
-		out := entry.sparseOutputs[uint32(outputIndex)]
-		if out.spent {
-			continue
-		}
-		size += compressedTxOutSize(uint64(out.amount), out.scriptVersion,
-			out.pkScript, currentCompressionVersion, out.compressed, true)
-	}
-	if entry.txType == stake.TxTypeSStx {
-		size += len(entry.stakeExtra)
+		compressedTxOutSize(uint64(entry.amount), entry.scriptVersion,
+			entry.pkScript, currentCompressionVersion, hasAmount)
+
+	if entry.ticketMinOuts != nil {
+		size += len(entry.ticketMinOuts.data)
 	}
 
-	// Serialize the version, block height, block index, and flags of the
-	// containing transaction, and "header code" which is a complex bitmap
-	// of spentness.
+	// Serialize the entry.
 	serialized := make([]byte, size)
-	offset := putVLQ(serialized, uint64(entry.txVersion))
-	offset += putVLQ(serialized[offset:], uint64(entry.height))
-	offset += putVLQ(serialized[offset:], uint64(entry.index))
+	offset := putVLQ(serialized, uint64(entry.blockHeight))
+	offset += putVLQ(serialized[offset:], uint64(entry.blockIndex))
 	offset += putVLQ(serialized[offset:], uint64(flags))
-	offset += putVLQ(serialized[offset:], headerCode)
-
-	// Serialize the unspentness bitmap.
-	for i := uint32(0); i < uint32(numBitmapBytes); i++ {
-		unspentBits := byte(0)
-		for j := uint32(0); j < 8; j++ {
-			// The first 2 outputs are encoded via the header code,
-			// so adjust the output index accordingly.
-			if !entry.IsOutputSpent(2 + i*8 + j) {
-				unspentBits |= 1 << uint8(j)
-			}
-		}
-		serialized[offset] = unspentBits
-		offset++
-	}
-
-	// Serialize the compressed unspent transaction outputs.  Outputs that
-	// are already compressed are serialized without modifications.
-	for _, outputIndex := range outputOrder {
-		out := entry.sparseOutputs[uint32(outputIndex)]
-		if out.spent {
-			continue
-		}
+	offset += putCompressedTxOut(serialized[offset:], uint64(entry.amount),
+		entry.scriptVersion, entry.pkScript, currentCompressionVersion, hasAmount)
 
-		offset += putCompressedTxOut(serialized[offset:],
-			uint64(out.amount), out.scriptVersion, out.pkScript,
-			currentCompressionVersion, out.compressed, true)
-	}
-
-	if entry.txType == stake.TxTypeSStx {
-		copy(serialized[offset:], entry.stakeExtra)
+	if entry.ticketMinOuts != nil {
+		copy(serialized[offset:], entry.ticketMinOuts.data)
 	}
 
 	return serialized, nil
@@ -1033,17 +955,10 @@ func serializeUtxoEntry(entry *UtxoEntry) ([]byte, error) {
 // deserializeUtxoEntry decodes a utxo entry from the passed serialized byte
 // slice into a new UtxoEntry using a format that is suitable for long-term
 // storage.  The format is described in detail above.
-func deserializeUtxoEntry(serialized []byte) (*UtxoEntry, error) {
-	// Deserialize the version.
-	version, bytesRead := deserializeVLQ(serialized)
-	offset := bytesRead
-	if offset >= len(serialized) {
-		return nil, errDeserialize("unexpected end of data after version")
-	}
-
+func deserializeUtxoEntry(serialized []byte, txOutIndex uint32) (*UtxoEntry, error) {
 	// Deserialize the block height.
-	blockHeight, bytesRead := deserializeVLQ(serialized[offset:])
-	offset += bytesRead
+	blockHeight, bytesRead := deserializeVLQ(serialized)
+	offset := bytesRead
 	if offset >= len(serialized) {
 		return nil, errDeserialize("unexpected end of data after height")
 	}
@@ -1061,133 +976,71 @@ func deserializeUtxoEntry(serialized []byte) (*UtxoEntry, error) {
 	if offset >= len(serialized) {
 		return nil, errDeserialize("unexpected end of data after flags")
 	}
-	isCoinBase, hasExpiry, txType, _ := decodeFlags(byte(flags))
+	isCoinBase, hasExpiry, txType := decodeFlags(txOutFlags(flags))
 
-	// Deserialize the header code.
-	code, bytesRead := deserializeVLQ(serialized[offset:])
-	offset += bytesRead
-	if offset >= len(serialized) {
-		return nil, errDeserialize("unexpected end of data after header")
+	// Decode the compressed unspent transaction output.
+	amount, scriptVersion, script, bytesRead, err :=
+		decodeCompressedTxOut(serialized[offset:], currentCompressionVersion,
+			true)
+	if err != nil {
+		return nil, errDeserialize(fmt.Sprintf("unable to decode utxo: %v", err))
 	}
+	offset += bytesRead
 
-	// Decode the header code.
-	//
-	// Bit 0 indicates output 0 is unspent.
-	// Bit 1 indicates output 1 is unspent.
-	// Bits 2-x encodes the number of non-zero unspentness bitmap bytes that
-	// follow.  When both output 0 and 1 are spent, it encodes N-1.
-	output0Unspent := code&0x01 != 0
-	output1Unspent := code&0x02 != 0
-	numBitmapBytes := code >> 2
-	if !output0Unspent && !output1Unspent {
-		numBitmapBytes++
-	}
-
-	// Ensure there are enough bytes left to deserialize the unspentness
-	// bitmap.
-	if uint64(len(serialized[offset:])) < numBitmapBytes {
-		return nil, errDeserialize("unexpected end of data for " +
-			"unspentness bitmap")
-	}
-
-	// Create a new utxo entry with the details deserialized above to house
-	// all of the utxos.
-	entry := newUtxoEntry(uint16(version), uint32(blockHeight),
-		uint32(blockIndex), isCoinBase, hasExpiry, txType)
-
-	// Add sparse output for unspent outputs 0 and 1 as needed based on the
-	// details provided by the header code.
-	var outputIndexes []uint32
-	if output0Unspent {
-		outputIndexes = append(outputIndexes, 0)
-	}
-	if output1Unspent {
-		outputIndexes = append(outputIndexes, 1)
-	}
-
-	// Decode the unspentness bitmap adding a sparse output for each unspent
-	// output.
-	for i := uint32(0); i < uint32(numBitmapBytes); i++ {
-		unspentBits := serialized[offset]
-		for j := uint32(0); j < 8; j++ {
-			if unspentBits&0x01 != 0 {
-				// The first 2 outputs are encoded via the
-				// header code, so adjust the output number
-				// accordingly.
-				outputNum := 2 + i*8 + j
-				outputIndexes = append(outputIndexes, outputNum)
-			}
-			unspentBits >>= 1
-		}
-		offset++
-	}
-
-	// Decode and add all of the utxos.
-	for i, outputIndex := range outputIndexes {
-		// Decode the next utxo.  The script and amount fields of the
-		// utxo output are left compressed so decompression can be
-		// avoided on those that are not accessed.  This is done since
-		// it is quite common for a redeeming transaction to only
-		// reference a single utxo from a referenced transaction.
-		//
-		// 'true' below instructs the method to deserialize a stored
-		// amount.
-		amount, scriptVersion, compScript, bytesRead, err :=
-			decodeCompressedTxOut(serialized[offset:], currentCompressionVersion,
-				true)
-		if err != nil {
-			return nil, errDeserialize(fmt.Sprintf("unable to "+
-				"decode utxo at index %d: %v", i, err))
-		}
-		offset += bytesRead
-
-		entry.sparseOutputs[outputIndex] = &utxoOutput{
-			spent:         false,
-			compressed:    true,
-			scriptVersion: scriptVersion,
-			pkScript:      compScript,
-			amount:        amount,
-		}
+	// Create a new utxo entry with the details deserialized above.
+	const spent = false
+	const modified = false
+	entry := &UtxoEntry{
+		amount:        amount,
+		pkScript:      script,
+		blockHeight:   uint32(blockHeight),
+		blockIndex:    uint32(blockIndex),
+		scriptVersion: scriptVersion,
+		packedFlags: encodeUtxoFlags(isCoinBase, spent, modified, hasExpiry,
+			txType),
 	}
 
-	// Copy the stake extra data if this was a ticket.
-	if entry.txType == stake.TxTypeSStx {
-		stakeExtra := make([]byte, len(serialized[offset:]))
-		copy(stakeExtra, serialized[offset:])
-		entry.stakeExtra = stakeExtra
+	// Copy the minimal outputs if this was a ticket submission output.
+	if isTicketSubmissionOutput(txType, txOutIndex) {
+		entry.ticketMinOuts = &ticketMinimalOutputs{
+			data: make([]byte, len(serialized[offset:])),
+		}
+		copy(entry.ticketMinOuts.data, serialized[offset:])
 	}
 
 	return entry, nil
 }
 
-// dbFetchUtxoEntry uses an existing database transaction to fetch all unspent
-// outputs for the provided Bitcoin transaction hash from the utxo set.
+// dbFetchUtxoEntry uses an existing database transaction to fetch the specified
+// transaction output from the utxo set.
 //
-// When there is no entry for the provided hash, nil will be returned for the
-// both the entry and the error.
-func dbFetchUtxoEntry(dbTx database.Tx, hash *chainhash.Hash) (*UtxoEntry, error) {
-	// Fetch the unspent transaction output information for the passed
-	// transaction hash.  Return now when there is no entry.
+// When there is no entry for the provided output, nil will be returned for both
+// the entry and the error.
+func dbFetchUtxoEntry(dbTx database.Tx, outpoint wire.OutPoint) (*UtxoEntry, error) {
+	// Fetch the unspent transaction output information for the passed transaction
+	// output.  Return now when there is no entry.
+	key := outpointKey(outpoint)
 	utxoBucket := dbTx.Metadata().Bucket(utxoSetBucketName)
-	serializedUtxo := utxoBucket.Get(hash[:])
+	serializedUtxo := utxoBucket.Get(*key)
+	recycleOutpointKey(key)
 	if serializedUtxo == nil {
 		return nil, nil
 	}
 
-	// A non-nil zero-length entry means there is an entry in the database
-	// for a fully spent transaction which should never be the case.
+	// A non-nil zero-length entry means there is an entry in the database for a
+	// spent transaction output which should never be the case.
 	if len(serializedUtxo) == 0 {
-		return nil, AssertError(fmt.Sprintf("database contains entry "+
-			"for fully spent tx %v", hash))
+		return nil, AssertError(fmt.Sprintf("database contains entry for spent tx "+
+			"output %v", outpoint))
 	}
 
 	// Deserialize the utxo entry and return it.
-	entry, err := deserializeUtxoEntry(serializedUtxo)
+	entry, err := deserializeUtxoEntry(serializedUtxo, outpoint.Index)
 	if err != nil {
-		// Ensure any deserialization errors are returned as database
-		// corruption errors.
+		// Ensure any deserialization errors are returned as database corruption
+		// errors.
 		if isDeserializeErr(err) {
-			str := fmt.Sprintf("corrupt utxo entry for %v: %v", hash, err)
+			str := fmt.Sprintf("corrupt utxo entry for %v: %v", outpoint, err)
 			return nil, makeDbErr(database.ErrCorruption, str)
 		}
 
@@ -1197,51 +1050,53 @@ func dbFetchUtxoEntry(dbTx database.Tx, hash *chainhash.Hash) (*UtxoEntry, error
 	return entry, nil
 }
 
-// dbFetchUxtoStats fetches statistics on the current unspent trnsaction output set.
+// dbFetchUxtoStats fetches statistics on the current unspent transaction output
+// set.
 func dbFetchUtxoStats(dbTx database.Tx) (*UtxoStats, error) {
 	utxoBucket := dbTx.Metadata().Bucket(utxoSetBucketName)
 
 	var stats UtxoStats
-	transactions := make(map[chainhash.Hash]int64)
+	transactions := make(map[chainhash.Hash]struct{})
 	leaves := make([]chainhash.Hash, 0)
 	cursor := utxoBucket.Cursor()
 
 	for ok := cursor.First(); ok; ok = cursor.Next() {
 		key := cursor.Key()
-		hash := chainhash.HashH(key)
+		outpoint, err := outpointFromKey(key)
+		if err != nil {
+			return nil, err
+		}
+
 		serializedUtxo := cursor.Value()
 		entrySize := len(serializedUtxo)
 
-		// A non-nil zero-length entry means there is an entry in the database
-		// for a fully spent transaction which should never be the case.
+		// A non-nil zero-length entry means there is an entry in the database for a
+		// spent transaction output which should never be the case.
 		if entrySize == 0 {
-			return nil, AssertError(fmt.Sprintf("database contains entry "+
-				"for fully spent tx %s", hash))
+			return nil, AssertError(fmt.Sprintf("database contains entry for spent "+
+				"tx output %v", outpoint))
 		}
 
 		stats.Utxos++
 		stats.Size += int64(entrySize)
-		transactions[hash]++
+		transactions[outpoint.Hash] = struct{}{}
 
 		leaves = append(leaves, chainhash.HashH(serializedUtxo))
 
-		// Deserialize the utxo entry and return it.
-		entry, err := deserializeUtxoEntry(serializedUtxo)
+		// Deserialize the utxo entry.
+		entry, err := deserializeUtxoEntry(serializedUtxo, outpoint.Index)
 		if err != nil {
-			// Ensure any deserialization errors are returned as database
-			// corruption errors.
+			// Ensure any deserialization errors are returned as database corruption
+			// errors.
 			if isDeserializeErr(err) {
-				str := fmt.Sprintf("corrupt utxo entry for %v: %v", hash, err)
+				str := fmt.Sprintf("corrupt utxo entry for %v: %v", outpoint, err)
 				return nil, makeDbErr(database.ErrCorruption, str)
 			}
 
 			return nil, err
 		}
 
-		for _, out := range entry.sparseOutputs {
-			stats.Utxos++
-			stats.Total += out.amount
-		}
+		stats.Total += entry.amount
 	}
 
 	stats.SerializedHash = standalone.CalcMerkleRootInPlace(leaves)
@@ -1250,42 +1105,40 @@ func dbFetchUtxoStats(dbTx database.Tx) (*UtxoStats, error) {
 	return &stats, nil
 }
 
-// dbPutUtxoView uses an existing database transaction to update the utxo set
-// in the database based on the provided utxo view contents and state.  In
-// particular, only the entries that have been marked as modified are written
-// to the database.
+// dbPutUtxoView uses an existing database transaction to update the utxo set in
+// the database based on the provided utxo view contents and state.  In
+// particular, only the entries that have been marked as modified are written to
+// the database.
 func dbPutUtxoView(dbTx database.Tx, view *UtxoViewpoint) error {
 	utxoBucket := dbTx.Metadata().Bucket(utxoSetBucketName)
-	for txHashIter, entry := range view.entries {
+	for outpoint, entry := range view.entries {
 		// No need to update the database if the entry was not modified.
-		if entry == nil || !entry.modified {
+		if entry == nil || !entry.isModified() {
 			continue
 		}
 
-		// Serialize the utxo entry without any entries that have been
-		// spent.
-		serialized, err := serializeUtxoEntry(entry)
-		if err != nil {
-			return err
-		}
-
-		// Make a copy of the hash because the iterator changes on each
-		// loop iteration and thus slicing it directly would cause the
-		// data to change out from under the put/delete funcs below.
-		txHash := txHashIter
-
-		// Remove the utxo entry if it is now fully spent.
-		if serialized == nil {
-			if err := utxoBucket.Delete(txHash[:]); err != nil {
+		// Remove the utxo entry if it is spent.
+		if entry.IsSpent() {
+			key := outpointKey(outpoint)
+			err := utxoBucket.Delete(*key)
+			recycleOutpointKey(key)
+			if err != nil {
 				return err
 			}
 
 			continue
 		}
 
-		// At this point the utxo entry is not fully spent, so store its
-		// serialization in the database.
-		err = utxoBucket.Put(txHash[:], serialized)
+		// Serialize and store the utxo entry.
+		serialized, err := serializeUtxoEntry(entry)
+		if err != nil {
+			return err
+		}
+		key := outpointKey(outpoint)
+		err = utxoBucket.Put(*key, serialized)
+		// NOTE: The key is intentionally not recycled here since the database
+		// interface contract prohibits modifications.  It will be garbage collected
+		// normally when the database is done with it.
 		if err != nil {
 			return err
 		}
@@ -1959,7 +1812,12 @@ func (b *BlockChain) initChainState(ctx context.Context) error {
 
 		return nil
 	})
-	return err
+	if err != nil {
+		return err
+	}
+
+	// Upgrade the database post block index load as needed.
+	return upgradeDBPostBlockIndexLoad(ctx, b)
 }
 
 // dbFetchBlockByNode uses an existing database transaction to retrieve the raw
diff --git a/blockchain/chainio_test.go b/blockchain/chainio_test.go
index 0ff57e608a..5091b01e16 100644
--- a/blockchain/chainio_test.go
+++ b/blockchain/chainio_test.go
@@ -16,7 +16,6 @@ import (
 
 	"github.com/decred/dcrd/blockchain/stake/v4"
 	"github.com/decred/dcrd/blockchain/standalone/v2"
-	"github.com/decred/dcrd/chaincfg/chainhash"
 	"github.com/decred/dcrd/database/v2"
 	"github.com/decred/dcrd/wire"
 )
@@ -347,53 +346,46 @@ func TestStxoSerialization(t *testing.T) {
 	tests := []struct {
 		name       string
 		stxo       spentTxOut
-		txVersion  int32 // When the txout is not fully spent.
 		serialized []byte
-	}{
-		{
-			name: "Spends last output of coinbase",
-			stxo: spentTxOut{
-				amount:        9999,
-				scriptVersion: 0,
-				pkScript:      hexToBytes("76a9146edbc6c4d31bae9f1ccc38538a114bf42de65e8688ac"),
-				height:        12345,
-				index:         54321,
-				isCoinBase:    true,
-				hasExpiry:     false,
-				txFullySpent:  true,
-				txType:        0,
-				txVersion:     1,
-			},
-			serialized: hexToBytes("4100006edbc6c4d31bae9f1ccc38538a114bf42de65e8601"),
-		},
-		{
-			name: "Spends last output of non coinbase and is a ticket",
-			stxo: spentTxOut{
-				amount:        9999,
-				scriptVersion: 0,
-				pkScript:      hexToBytes("76a9146edbc6c4d31bae9f1ccc38538a114bf42de65e8688ac"),
-				height:        12345,
-				index:         54321,
-				isCoinBase:    false,
-				hasExpiry:     false,
-				txFullySpent:  true,
-				txType:        1,
-				txVersion:     1,
-				stakeExtra:    []byte{0x00},
-			},
-			serialized: hexToBytes("4400006edbc6c4d31bae9f1ccc38538a114bf42de65e860100"),
+		txOutIndex uint32
+	}{{
+		name: "Coinbase, no expiry",
+		stxo: spentTxOut{
+			amount:        9999,
+			scriptVersion: 0,
+			pkScript: hexToBytes("76a9146edbc6c4d31bae9f1ccc38538a114bf42de65e8688a" +
+				"c"),
+			blockHeight: 12345,
+			blockIndex:  54321,
+			packedFlags: encodeFlags(
+				true,  // coinbase
+				false, // no expiry
+				stake.TxTypeRegular,
+			),
 		},
-		{
-			name: "Does not spend last output",
-			stxo: spentTxOut{
-				amount:        34405000000,
-				pkScript:      hexToBytes("76a9146edbc6c4d31bae9f1ccc38538a114bf42de65e8688ac"),
-				scriptVersion: 0,
+		serialized: hexToBytes("0100006edbc6c4d31bae9f1ccc38538a114bf42de65e86"),
+		txOutIndex: 3,
+	}, {
+		name: "Ticket submission",
+		stxo: spentTxOut{
+			amount:        9999,
+			scriptVersion: 0,
+			pkScript: hexToBytes("76a9146edbc6c4d31bae9f1ccc38538a114bf42de65e8688a" +
+				"c"),
+			blockHeight: 12345,
+			blockIndex:  54321,
+			packedFlags: encodeFlags(
+				false, // not coinbase
+				true,  // has expiry
+				stake.TxTypeSStx,
+			),
+			ticketMinOuts: &ticketMinimalOutputs{
+				data: []byte{0x00},
 			},
-			txVersion:  1,
-			serialized: hexToBytes("0000006edbc6c4d31bae9f1ccc38538a114bf42de65e86"),
 		},
-	}
+		serialized: hexToBytes("0600006edbc6c4d31bae9f1ccc38538a114bf42de65e8600"),
+		txOutIndex: 0,
+	}}
 
 	for _, test := range tests {
 		// Ensure the function to calculate the serialized size without
@@ -426,16 +418,19 @@ func TestStxoSerialization(t *testing.T) {
 		// stxo.
 		var gotStxo spentTxOut
 		offset, err := decodeSpentTxOut(test.serialized, &gotStxo,
-			test.stxo.amount, test.stxo.height, test.stxo.index)
+			test.stxo.amount, test.stxo.blockHeight, test.stxo.blockIndex,
+			test.txOutIndex)
 		if err != nil {
-			t.Errorf("decodeSpentTxOut (%s): unexpected error: %v",
-				test.name, err)
+			t.Errorf("decodeSpentTxOut (%s): unexpected error: %v", test.name, err)
 			continue
 		}
+		if !reflect.DeepEqual(gotStxo, test.stxo) {
+			t.Errorf("decodeSpentTxOut (%s):\nwant: %+v\n got: %+v\n", test.name,
+				test.stxo, gotStxo)
+		}
 		if offset != len(test.serialized) {
-			t.Errorf("decodeSpentTxOut (%s): did not get expected "+
-				"number of bytes read - got %d, want %d",
-				test.name, offset, len(test.serialized))
+			t.Errorf("decodeSpentTxOut (%s): did not get expected number of bytes "+
+				"read - got %d, want %d", test.name, offset, len(test.serialized))
 			continue
 		}
 	}
@@ -449,88 +444,38 @@ func TestStxoDecodeErrors(t *testing.T) {
 	tests := []struct {
 		name       string
 		stxo       spentTxOut
+		txOutIndex uint32
 		serialized []byte
 		errType    error
 		bytesRead  int // Expected number of bytes read.
-	}{
-		{
-			// [EOF]
-			name:       "nothing serialized (no flags)",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes(""),
-			errType:    errDeserialize(""),
-			bytesRead:  0,
-		},
-		{
-			// [<flags 00> EOF]
-			name:       "no compressed txout script version",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("00"),
-			errType:    errDeserialize(""),
-			bytesRead:  1,
-		},
-		{
-			// [<flags 10> <script version 00> EOF]
-			name:       "no tx version data after empty script for a fully spent regular stxo",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("4000"),
-			errType:    errDeserialize(""),
-			bytesRead:  2,
-		},
-		{
-			// [<flags 10> <script version 00> <compressed pk script 01 6e ...> EOF]
-			name:       "no tx version data after a pay-to-script-hash script for a fully spent regular stxo",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("4000016edbc6c4d31bae9f1ccc38538a114bf42de65e86"),
-			errType:    errDeserialize(""),
-			bytesRead:  23,
-		},
-		{
-			// [<flags 14> <script version 00> <compressed pk script 01 6e ...> <tx version 01> EOF]
-			name:       "no stakeextra data after script for a fully spent ticket stxo",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("4400016edbc6c4d31bae9f1ccc38538a114bf42de65e8601"),
-			errType:    errDeserialize(""),
-			bytesRead:  24,
-		},
-		{
-			// [<flags 14> <script version 00> <compressed pk script 01 6e ...> <tx version 01> <stakeextra {num outputs 01}> EOF]
-			name:       "truncated stakeextra data after script for a fully spent ticket stxo (num outputs only)",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("4400016edbc6c4d31bae9f1ccc38538a114bf42de65e860101"),
-			errType:    errDeserialize(""),
-			bytesRead:  25,
-		},
-		{
-			// [<flags 14> <script version 00> <compressed pk script 01 6e ...> <tx version 01> <stakeextra {num outputs 01} {amount 0f}> EOF]
-			name:       "truncated stakeextra data after script for a fully spent ticket stxo (num outputs and amount only)",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("4400016edbc6c4d31bae9f1ccc38538a114bf42de65e8601010f"),
-			errType:    errDeserialize(""),
-			bytesRead:  26,
-		},
-		{
-			// [<flags 14> <script version 00> <compressed pk script 01 6e ...> <tx version 01> <stakeextra {num outputs 01} {amount 0f} {script version 00}> EOF]
-			name:       "truncated stakeextra data after script for a fully spent ticket stxo (num outputs, amount, and script version only)",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("4400016edbc6c4d31bae9f1ccc38538a114bf42de65e8601010f00"),
-			errType:    errDeserialize(""),
-			bytesRead:  27,
-		},
-		{
-			// [<flags 14> <script version 00> <compressed pk script 01 6e ...> <tx version 01> <stakeextra {num outputs 01} {amount 0f} {script version 00} {script size 1a} {25 bytes of script instead of 26}> EOF]
-			name:       "truncated stakeextra data after script for a fully spent ticket stxo (script size specified as 0x1a, but only 0x19 bytes provided)",
-			stxo:       spentTxOut{},
-			serialized: hexToBytes("4400016edbc6c4d31bae9f1ccc38538a114bf42de65e8601010f001aba76a9140cdf9941c0c221243cb8672cd1ad2c4c0933850588"),
-			errType:    errDeserialize(""),
-			bytesRead:  28,
-		},
-	}
+	}{{
+		name:       "nothing serialized (no flags)",
+		stxo:       spentTxOut{},
+		txOutIndex: 0,
+		serialized: hexToBytes(""),
+		errType:    errDeserialize(""),
+		bytesRead:  0,
+	}, {
+		name:       "no data after flags",
+		stxo:       spentTxOut{},
+		txOutIndex: 0,
+		serialized: hexToBytes("01"),
+		errType:    errDeserialize(""),
+		bytesRead:  1,
+	}, {
+		name:       "incomplete compressed txout",
+		stxo:       spentTxOut{},
+		txOutIndex: 0,
+		serialized: hexToBytes("010012"),
+		errType:    errDeserialize(""),
+		bytesRead:  2,
+	}}
 
 	for _, test := range tests {
 		// Ensure the expected error type is returned.
 		gotBytesRead, err := decodeSpentTxOut(test.serialized,
-			&test.stxo, test.stxo.amount, test.stxo.height, test.stxo.index)
+			&test.stxo, test.stxo.amount, test.stxo.blockHeight, test.stxo.blockIndex,
+			test.txOutIndex)
 		if !errors.As(err, &test.errType) {
 			t.Errorf("decodeSpentTxOut (%s): expected error type "+
 				"does not match - got %T, want %T", test.name,
@@ -557,227 +502,218 @@ func TestSpendJournalSerialization(t *testing.T) {
 		name       string
 		entry      []spentTxOut
 		blockTxns  []*wire.MsgTx
-		utxoView   *UtxoViewpoint
 		serialized []byte
-	}{
-		{
-			name:       "No spends",
-			entry:      nil,
-			blockTxns:  nil,
-			utxoView:   NewUtxoViewpoint(nil),
-			serialized: nil,
-		},
-		{
-			name: "One tx with one input spends last output of coinbase",
-			entry: []spentTxOut{{
-				amount:        5000000000,
-				scriptVersion: 0,
-				pkScript:      hexToBytes("0511db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5c"),
-				compressed:    true,
-				height:        9,
-				index:         0,
-				isCoinBase:    true,
-				hasExpiry:     false,
-				txFullySpent:  true,
-				txType:        0,
-				txVersion:     1,
-				stakeExtra:    nil,
-			}},
-			blockTxns: []*wire.MsgTx{{ // Coinbase omitted.
-				SerType: wire.TxSerializeFull,
-				Version: 1,
-				TxIn: []*wire.TxIn{{
-					PreviousOutPoint: wire.OutPoint{
-						Hash:  *mustParseHash("0437cd7f8525ceed2324359c2d0ba26006d92d856a9c20fa0241106ee5a597c9"),
-						Index: 0,
-						Tree:  0,
-					},
-					SignatureScript: hexToBytes("47304402204e45e16932b8af514961a1d3a1a25fdf3f4f7732e9d624c6c61548ab5fb8cd410220181522ec8eca07de4860a4acdd12909d831cc56cbbac4622082221a8768d1d0901"),
-					Sequence:        0xffffffff,
-					BlockHeight:     9,
-					BlockIndex:      0,
-					ValueIn:         5000000000,
-				}},
-				TxOut: []*wire.TxOut{{
-					Value:    1000000000,
-					Version:  0,
-					PkScript: hexToBytes("4104ae1a62fe09c5f51b13905f07f06b99a2f7159b2225f374cd378d71302fa28414e7aab37397f554a7df5f142c21c1b7303b8a0626f1baded5c72a704f7e6cd84cac"),
-				}, {
-					Value:    4000000000,
-					Version:  0,
-					PkScript: hexToBytes("410411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03f999b8643f656b412a3ac"),
-				}},
-				LockTime: 0,
-				Expiry:   0,
+	}{{
+		name:       "No spends",
+		entry:      nil,
+		blockTxns:  nil,
+		serialized: nil,
+	}, {
+		name: "One tx with one input",
+		entry: []spentTxOut{{
+			amount:        5000000000,
+			scriptVersion: 0,
+			pkScript: hexToBytes("0511db93e1dcdb8a016b49840f8c53bc1eb68a382e97b148" +
+				"2ecad7b148a6909a5c"),
+			blockHeight: 9,
+			blockIndex:  0,
+			packedFlags: encodeFlags(
+				true,  // coinbase
+				false, // no expiry
+				stake.TxTypeRegular,
+			),
+		}},
+		blockTxns: []*wire.MsgTx{{ // Coinbase omitted.
+			SerType: wire.TxSerializeFull,
+			Version: 1,
+			TxIn: []*wire.TxIn{{
+				PreviousOutPoint: wire.OutPoint{
+					Hash: *mustParseHash("0437cd7f8525ceed2324359c2d0ba26006d92d856a9c2" +
+						"0fa0241106ee5a597c9"),
+					Index: 0,
+					Tree:  0,
+				},
+				SignatureScript: hexToBytes("47304402204e45e16932b8af514961a1d3a1a25f" +
+					"df3f4f7732e9d624c6c61548ab5fb8cd410220181522ec8eca07de4860a4acdd12" +
+					"909d831cc56cbbac4622082221a8768d1d0901"),
+				Sequence:    0xffffffff,
+				BlockHeight: 9,
+				BlockIndex:  0,
+				ValueIn:     5000000000,
 			}},
-			utxoView:   NewUtxoViewpoint(nil),
-			serialized: hexToBytes("41000511db93e1dcdb8a016b49840f8c53bc1eb68a382e97b1482ecad7b148a6909a5c01"),
-		},
-		{
-			name: "Two txns when one spends last output, one doesn't",
-			entry: []spentTxOut{{
-				amount:        34405000000,
-				height:        321,
-				index:         123,
-				scriptVersion: 0,
-				pkScript:      hexToBytes("016edbc6c4d31bae9f1ccc38538a114bf42de65e86"),
-				compressed:    true,
+			TxOut: []*wire.TxOut{{
+				Value:   1000000000,
+				Version: 0,
+				PkScript: hexToBytes("4104ae1a62fe09c5f51b13905f07f06b99a2f7159b2225f" +
+					"374cd378d71302fa28414e7aab37397f554a7df5f142c21c1b7303b8a0626f1bad" +
+					"ed5c72a704f7e6cd84cac"),
 			}, {
-				amount:        13761000000,
-				scriptVersion: 0,
-				pkScript:      hexToBytes("01b2fb57eadf61e106a100a7445a8c3f67898841ec"),
-				compressed:    true,
-				height:        3214,
-				index:         1234,
-				isCoinBase:    false,
-				hasExpiry:     false,
-				txFullySpent:  true,
-				txType:        0,
-				txVersion:     1,
-				stakeExtra:    nil,
+				Value:   4000000000,
+				Version: 0,
+				PkScript: hexToBytes("410411db93e1dcdb8a016b49840f8c53bc1eb68a382e97b" +
+					"1482ecad7b148a6909a5cb2e0eaddfb84ccf9744464f82e160bfa9b8b64f9d4c03" +
+					"f999b8643f656b412a3ac"),
 			}},
-			blockTxns: []*wire.MsgTx{{ // Coinbase omitted.
-				SerType: wire.TxSerializeFull,
-				Version: 1,
-				TxIn: []*wire.TxIn{{
-					PreviousOutPoint: wire.OutPoint{
-						Hash:  *mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f426433047462477dc7a5d470f987a537"),
-						Index: 1,
-						Tree:  0,
-					},
-					SignatureScript: hexToBytes("493046022100c167eead9840da4a033c9a56470d7794a9bb1605b377ebe5688499b39f94be59022100fb6345cab4324f9ea0b9ee9169337534834638d818129778370f7d378ee4a325014104d962cac5390f12ddb7539507065d0def320d68c040f2e73337c3a1aaaab7195cb5c4d02e0959624d534f3c10c3cf3d73ca5065ebd62ae986b04c6d090d32627c"),
-					Sequence:        0xffffffff,
-					BlockHeight:     321,
-					BlockIndex:      123,
-					ValueIn:         34405000000,
-				}},
-				TxOut: []*wire.TxOut{{
-					Value:    5000000,
-					Version:  0,
-					PkScript: hexToBytes("76a914f419b8db4ba65f3b6fcc233acb762ca6f51c23d488ac"),
-				}, {
-					Value:    34400000000,
-					Version:  0,
-					PkScript: hexToBytes("76a914cadf4fc336ab3c6a4610b75f31ba0676b7f663d288ac"),
-				}},
-				LockTime: 0,
-				Expiry:   0,
+			LockTime: 0,
+			Expiry:   0,
+		}},
+		serialized: hexToBytes("0100610511db93e1dcdb8a016b49840f8c53bc1eb68a382e9" +
+			"7b1482ecad7b148a6909a5c"),
+	}, {
+		name: "Two txns with one input each",
+		entry: []spentTxOut{{
+			amount:        34405000000,
+			blockHeight:   321,
+			blockIndex:    123,
+			scriptVersion: 0,
+			pkScript:      hexToBytes("016edbc6c4d31bae9f1ccc38538a114bf42de65e86"),
+			packedFlags: encodeFlags(
+				false, // not coinbase
+				false, // no expiry
+				stake.TxTypeRegular,
+			),
+		}, {
+			amount:        13761000000,
+			scriptVersion: 0,
+			pkScript:      hexToBytes("01b2fb57eadf61e106a100a7445a8c3f67898841ec"),
+			blockHeight:   3214,
+			blockIndex:    1234,
+			packedFlags: encodeFlags(
+				true,  // coinbase
+				false, // no expiry
+				stake.TxTypeRegular,
+			),
+		}},
+		blockTxns: []*wire.MsgTx{{ // Coinbase omitted.
+			SerType: wire.TxSerializeFull,
+			Version: 1,
+			TxIn: []*wire.TxIn{{
+				PreviousOutPoint: wire.OutPoint{
+					Hash: *mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f4264330474624" +
+						"77dc7a5d470f987a537"),
+					Index: 1,
+					Tree:  0,
+				},
+				SignatureScript: hexToBytes("493046022100c167eead9840da4a033c9a56470d" +
+					"7794a9bb1605b377ebe5688499b39f94be59022100fb6345cab4324f9ea0b9ee91" +
+					"69337534834638d818129778370f7d378ee4a325014104d962cac5390f12ddb753" +
+					"9507065d0def320d68c040f2e73337c3a1aaaab7195cb5c4d02e0959624d534f3c" +
+					"10c3cf3d73ca5065ebd62ae986b04c6d090d32627c"),
+				Sequence:    0xffffffff,
+				BlockHeight: 321,
+				BlockIndex:  123,
+				ValueIn:     34405000000,
+			}},
+			TxOut: []*wire.TxOut{{
+				Value:   5000000,
+				Version: 0,
+				PkScript: hexToBytes("76a914f419b8db4ba65f3b6fcc233acb762ca6f51c23d48" +
+					"8ac"),
 			}, {
-				SerType: wire.TxSerializeFull,
-				Version: 1,
-				TxIn: []*wire.TxIn{{
-					PreviousOutPoint: wire.OutPoint{
-						Hash:  *mustParseHash("92fbe1d4be82f765dfabc9559d4620864b05cc897c4db0e29adac92d294e52b7"),
-						Index: 0,
-						Tree:  0,
-					},
-					SignatureScript: hexToBytes("483045022100e256743154c097465cf13e89955e1c9ff2e55c46051b627751dee0144183157e02201d8d4f02cde8496aae66768f94d35ce54465bd4ae8836004992d3216a93a13f00141049d23ce8686fe9b802a7a938e8952174d35dd2c2089d4112001ed8089023ab4f93a3c9fcd5bfeaa9727858bf640dc1b1c05ec3b434bb59837f8640e8810e87742"),
-					Sequence:        0xffffffff,
-					BlockHeight:     3214,
-					BlockIndex:      1234,
-					ValueIn:         13761000000,
-				}},
-				TxOut: []*wire.TxOut{{
-					Value:    5000000,
-					Version:  0,
-					PkScript: hexToBytes("76a914a983ad7c92c38fc0e2025212e9f972204c6e687088ac"),
-				}, {
-					Value:    13756000000,
-					Version:  0,
-					PkScript: hexToBytes("76a914a6ebd69952ab486a7a300bfffdcb395dc7d47c2388ac"),
-				}},
-				LockTime: 0,
-				Expiry:   0,
+				Value:   34400000000,
+				Version: 0,
+				PkScript: hexToBytes("76a914cadf4fc336ab3c6a4610b75f31ba0676b7f663d28" +
+					"8ac"),
 			}},
-			utxoView: &UtxoViewpoint{entries: map[chainhash.Hash]*UtxoEntry{
-				*mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f426433047462477dc7a5d470f987a537"): {
-					txVersion:  1,
-					isCoinBase: false,
-					hasExpiry:  false,
-					height:     321,
-					index:      123,
-					sparseOutputs: map[uint32]*utxoOutput{
-						1: {
-							amount:        34405000000,
-							scriptVersion: 0,
-							pkScript:      hexToBytes("76a9142084541c3931677527a7eafe56fd90207c344eb088ac"),
-							compressed:    false,
-						},
-					},
+			LockTime: 0,
+			Expiry:   0,
+		}, {
+			SerType: wire.TxSerializeFull,
+			Version: 1,
+			TxIn: []*wire.TxIn{{
+				PreviousOutPoint: wire.OutPoint{
+					Hash: *mustParseHash("92fbe1d4be82f765dfabc9559d4620864b05cc897c4db" +
+						"0e29adac92d294e52b7"),
+					Index: 0,
+					Tree:  0,
 				},
+				SignatureScript: hexToBytes("483045022100e256743154c097465cf13e89955" +
+					"e1c9ff2e55c46051b627751dee0144183157e02201d8d4f02cde8496aae66768f" +
+					"94d35ce54465bd4ae8836004992d3216a93a13f00141049d23ce8686fe9b802a7" +
+					"a938e8952174d35dd2c2089d4112001ed8089023ab4f93a3c9fcd5bfeaa972785" +
+					"8bf640dc1b1c05ec3b434bb59837f8640e8810e87742"),
+				Sequence:    0xffffffff,
+				BlockHeight: 3214,
+				BlockIndex:  1234,
+				ValueIn:     13761000000,
 			}},
-			serialized: hexToBytes("400001b2fb57eadf61e106a100a7445a8c3f67898841ec010000016edbc6c4d31bae9f1ccc38538a114bf42de65e86"),
-		},
-		{
-			name: "One tx, two inputs from same tx, neither spend last output",
-			entry: []spentTxOut{{
-				amount:        159747816,
-				height:        1111,
-				index:         2222,
-				scriptVersion: 0,
-				pkScript:      hexToBytes("4151"),
-				compressed:    true,
+			TxOut: []*wire.TxOut{{
+				Value:   5000000,
+				Version: 0,
+				PkScript: hexToBytes("76a914a983ad7c92c38fc0e2025212e9f972204c6e68708" +
+					"8ac"),
 			}, {
-				amount:        159747816,
-				height:        3333,
-				index:         4444,
-				scriptVersion: 0,
-				pkScript:      hexToBytes("4151"),
-				compressed:    true,
+				Value:   13756000000,
+				Version: 0,
+				PkScript: hexToBytes("76a914a6ebd69952ab486a7a300bfffdcb395dc7d47c238" +
+					"8ac"),
 			}},
-			blockTxns: []*wire.MsgTx{{ // Coinbase omitted.
-				SerType: wire.TxSerializeFull,
-				Version: 1,
-				TxIn: []*wire.TxIn{{
-					PreviousOutPoint: wire.OutPoint{
-						Hash:  *mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f426433047462477dc7a5d470f987a537"),
-						Index: 1,
-					},
-					SignatureScript: hexToBytes(""),
-					Sequence:        0xffffffff,
-					BlockHeight:     1111,
-					BlockIndex:      2222,
-					ValueIn:         159747816,
-				}, {
-					PreviousOutPoint: wire.OutPoint{
-						Hash:  *mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f426433047462477dc7a5d470f987a537"),
-						Index: 2,
-					},
-					SignatureScript: hexToBytes(""),
-					Sequence:        0xffffffff,
-					BlockHeight:     3333,
-					BlockIndex:      4444,
-					ValueIn:         159747816,
-				}},
-				TxOut: []*wire.TxOut{{
-					Value:    165125632,
-					Version:  0,
-					PkScript: hexToBytes("51"),
-				}, {
-					Value:    154370000,
-					Version:  0,
-					PkScript: hexToBytes("51"),
-				}},
-				LockTime: 0,
-				Expiry:   0,
-			}},
-			utxoView: &UtxoViewpoint{entries: map[chainhash.Hash]*UtxoEntry{
-				*mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f426433047462477dc7a5d470f987a537"): {
-					txVersion:  1,
-					isCoinBase: false,
-					hasExpiry:  false,
-					height:     100000,
-					sparseOutputs: map[uint32]*utxoOutput{
-						0: {
-							amount:   165712179,
-							pkScript: hexToBytes("51"),
-						},
-					},
+			LockTime: 0,
+			Expiry:   0,
+		}},
+		serialized: hexToBytes("01005501b2fb57eadf61e106a100a7445a8c3f67898841ec0" +
+			"00055016edbc6c4d31bae9f1ccc38538a114bf42de65e86"),
+	}, {
+		name: "One tx, two inputs from same tx",
+		entry: []spentTxOut{{
+			amount:        159747816,
+			blockHeight:   1111,
+			blockIndex:    2222,
+			scriptVersion: 0,
+			pkScript:      hexToBytes("4151"),
+			packedFlags: encodeFlags(
+				false, // not coinbase
+				false, // no expiry
+				stake.TxTypeRegular,
+			),
+		}, {
+			amount:        159747816,
+			blockHeight:   3333,
+			blockIndex:    4444,
+			scriptVersion: 0,
+			pkScript:      hexToBytes("4151"),
+			packedFlags:   encodeFlags(false, false, stake.TxTypeRegular),
+		}},
+		blockTxns: []*wire.MsgTx{{ // Coinbase omitted.
+			SerType: wire.TxSerializeFull,
+			Version: 1,
+			TxIn: []*wire.TxIn{{
+				PreviousOutPoint: wire.OutPoint{
+					Hash: *mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f4264330474624" +
+						"77dc7a5d470f987a537"),
+					Index: 1,
 				},
+				SignatureScript: hexToBytes(""),
+				Sequence:        0xffffffff,
+				BlockHeight:     1111,
+				BlockIndex:      2222,
+				ValueIn:         159747816,
+			}, {
+				PreviousOutPoint: wire.OutPoint{
+					Hash: *mustParseHash("c0ed017828e59ad5ed3cf70ee7c6fb0f4264330474624" +
+						"77dc7a5d470f987a537"),
+					Index: 2,
+				},
+				SignatureScript: hexToBytes(""),
+				Sequence:        0xffffffff,
+				BlockHeight:     3333,
+				BlockIndex:      4444,
+				ValueIn:         159747816,
 			}},
-			serialized: hexToBytes("0000415100004151"),
-		},
-	}
+			TxOut: []*wire.TxOut{{
+				Value:    165125632,
+				Version:  0,
+				PkScript: hexToBytes("51"),
+			}, {
+				Value:    154370000,
+				Version:  0,
+				PkScript: hexToBytes("51"),
+			}},
+			LockTime: 0,
+			Expiry:   0,
+		}},
+		serialized: hexToBytes("00004241510000424151"),
+	}}
 
 	for i, test := range tests {
 		// Ensure the journal entry serializes to the expected value.
@@ -895,293 +831,158 @@ func TestUtxoSerialization(t *testing.T) {
 		name       string
 		entry      *UtxoEntry
 		serialized []byte
+		txOutIndex uint32
 	}{
 		{
-			name: "Only output 0, coinbase, even uncomp pubkey",
-			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: true,
-				hasExpiry:  false,
-				txType:     0,
-				height:     12345,
-				index:      54321,
-				stakeExtra: nil,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						amount:        5000000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("410496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858eeac"),
-						compressed:    false,
-					},
-				},
-			},
-			serialized: hexToBytes("01df3982a731010132000496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52"),
-		},
-		{
-			name: "Only output 0, coinbase, odd uncomp pubkey",
-			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: true,
-				hasExpiry:  false,
-				txType:     0,
-				height:     12345,
-				index:      54321,
-				stakeExtra: nil,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						amount:        5000000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("410496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52258a76c86aea2b1f59fb07ebe87e19dd6b8dee99409de18c57d340dbbd37a341ac"),
-						compressed:    false,
-					},
-				},
-			},
-			serialized: hexToBytes("01df3982a731010132000596b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52"),
-		},
-		{
-			name: "Only output 1, not coinbase",
-			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     0,
-				height:     55555,
-				index:      1,
-				stakeExtra: nil,
-				sparseOutputs: map[uint32]*utxoOutput{
-					1: {
-						amount:        1000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914ee8bd501094a7d5ca318da2506de35e1cb025ddc88ac"),
-						compressed:    false,
-					},
-				},
-			},
-			serialized: hexToBytes("0182b103010002070000ee8bd501094a7d5ca318da2506de35e1cb025ddc"),
-		},
-		{
-			name: "Ticket with one output",
-			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     1,
-				height:     55555,
-				index:      1,
-				stakeExtra: hexToBytes("030f001aba76a9140cdf9941c0c221243cb8672cd1ad2c4c0933850588ac0000206a1e1a221182c26bbae681e4d96d452794e1951e70a208520000000000000054b5f466001abd76a9146c4f8b15918566534d134be7d7004b7f481bf36988ac"),
-				sparseOutputs: map[uint32]*utxoOutput{
-					1: {
-						amount:        1000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914ee8bd501094a7d5ca318da2506de35e1cb025ddc88ac"),
-						compressed:    false,
-					},
-				},
-			},
-			serialized: hexToBytes("0182b103010402070000ee8bd501094a7d5ca318da2506de35e1cb025ddc030f001aba76a9140cdf9941c0c221243cb8672cd1ad2c4c0933850588ac0000206a1e1a221182c26bbae681e4d96d452794e1951e70a208520000000000000054b5f466001abd76a9146c4f8b15918566534d134be7d7004b7f481bf36988ac"),
-		},
-		{
-			name: "Only output 2, coinbase, non-zero script version",
+			name: "Coinbase, even uncomp pubkey",
 			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: true,
-				hasExpiry:  false,
-				txType:     0,
-				height:     12345,
-				index:      1,
-				sparseOutputs: map[uint32]*utxoOutput{
-					2: {
-						amount:        100937281,
-						scriptVersion: 0xffff,
-						pkScript:      hexToBytes("76a914da33f77cee27c2a975ed5124d7e4f7f97513510188ac"),
-						compressed:    false,
-					},
-				},
+				amount: 5000000000,
+				pkScript: hexToBytes("410496b538e853519c726a2c91e61ec11600ae1390813a6" +
+					"27c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621" +
+					"e73a82cbf2342c858eeac"),
+				blockHeight:   12345,
+				blockIndex:    54321,
+				scriptVersion: 0,
+				packedFlags: encodeUtxoFlags(
+					true,  // coinbase
+					false, // unspent
+					false, // not modified
+					false, // no expiry
+					stake.TxTypeRegular,
+				),
 			},
-			serialized: hexToBytes("01df390101000182b095bf4182fe7f00da33f77cee27c2a975ed5124d7e4f7f975135101"),
-		},
-		{
-			name: "outputs 0 and 2 not coinbase",
+			serialized: hexToBytes("df3982a7310132000496b538e853519c726a2c91e61ec11" +
+				"600ae1390813a627c66fb8be7947be63c52"),
+			txOutIndex: 0,
+		}, {
+			name: "Coinbase, odd uncomp pubkey",
 			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     0,
-				height:     99999,
-				index:      3,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						amount:        20000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914e2ccd6ec7c6e2e581349c77e067385fa8236bf8a88ac"),
-						compressed:    false,
-					},
-					2: {
-						amount:        15000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914b8025be1b3efc63b0ad48e7f9f10e87544528d5888ac"),
-						compressed:    false,
-					},
-				},
+				amount: 5000000000,
+				pkScript: hexToBytes("410496b538e853519c726a2c91e61ec11600ae1390813a6" +
+					"27c66fb8be7947be63c52258a76c86aea2b1f59fb07ebe87e19dd6b8dee99409de" +
+					"18c57d340dbbd37a341ac"),
+				blockHeight:   12345,
+				blockIndex:    54321,
+				scriptVersion: 0,
+				packedFlags: encodeUtxoFlags(
+					true,  // coinbase
+					false, // unspent
+					false, // not modified
+					false, // no expiry
+					stake.TxTypeRegular,
+				),
 			},
-			serialized: hexToBytes("01858c1f03000501120000e2ccd6ec7c6e2e581349c77e067385fa8236bf8a80090000b8025be1b3efc63b0ad48e7f9f10e87544528d58"),
-		},
-		{
-			name: "outputs 0 and 2 not coinbase, has expiry",
+			serialized: hexToBytes("df3982a7310132000596b538e853519c726a2c91e61ec11" +
+				"600ae1390813a627c66fb8be7947be63c52"),
+			txOutIndex: 0,
+		}, {
+			name: "Non-coinbase regular tx",
 			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  true,
-				txType:     0,
-				height:     99999,
-				index:      3,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						amount:        20000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914e2ccd6ec7c6e2e581349c77e067385fa8236bf8a88ac"),
-						compressed:    false,
-					},
-					2: {
-						amount:        15000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914b8025be1b3efc63b0ad48e7f9f10e87544528d5888ac"),
-						compressed:    false,
-					},
-				},
+				amount: 1000000,
+				pkScript: hexToBytes("76a914ee8bd501094a7d5ca318da2506de35e1cb025ddc8" +
+					"8ac"),
+				blockHeight:   55555,
+				blockIndex:    1,
+				scriptVersion: 0,
+				packedFlags: encodeUtxoFlags(
+					false, // not coinbase
+					false, // unspent
+					false, // not modified
+					false, // no expiry
+					stake.TxTypeRegular,
+				),
 			},
-			serialized: hexToBytes("01858c1f03020501120000e2ccd6ec7c6e2e581349c77e067385fa8236bf8a80090000b8025be1b3efc63b0ad48e7f9f10e87544528d58"),
-		},
-		{
-			name: "outputs 0 and 2, not coinbase, 1 marked spent",
+			serialized: hexToBytes("82b1030100070000ee8bd501094a7d5ca318da2506de35e" +
+				"1cb025ddc"),
+			txOutIndex: 0,
+		}, {
+			name: "Ticket tx",
 			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     0,
-				height:     12345,
-				index:      1,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						amount:        20000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914e2ccd6ec7c6e2e581349c77e067385fa8236bf8a88ac"),
-						compressed:    false,
-					},
-					1: { // This won't be serialized.
-						spent:         true,
-						amount:        1000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914e43031c3e46f20bf1ccee9553ce815de5a48467588ac"),
-						compressed:    false,
-					},
-					2: {
-						amount:        15000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914b8025be1b3efc63b0ad48e7f9f10e87544528d5888ac"),
-						compressed:    false,
-					},
+				amount: 1000000,
+				pkScript: hexToBytes("76a914ee8bd501094a7d5ca318da2506de35e1cb025ddc8" +
+					"8ac"),
+				blockHeight:   55555,
+				blockIndex:    1,
+				scriptVersion: 0,
+				packedFlags: encodeUtxoFlags(
+					false, // not coinbase
+					false, // unspent
+					false, // not modified
+					true,  // has expiry
+					stake.TxTypeSStx,
+				),
+				ticketMinOuts: &ticketMinimalOutputs{
+					data: hexToBytes("030f001aba76a9140cdf9941c0c221243cb8672cd1ad2c4c0" +
+						"933850588ac0000206a1e1a221182c26bbae681e4d96d452794e1951e70a2085" +
+						"20000000000000054b5f466001abd76a9146c4f8b15918566534d134be7d7004" +
+						"b7f481bf36988ac"),
 				},
 			},
-			serialized: hexToBytes("01df3901000501120000e2ccd6ec7c6e2e581349c77e067385fa8236bf8a80090000b8025be1b3efc63b0ad48e7f9f10e87544528d58"),
-		},
-		{
-			name: "outputs 0 and 2, not coinbase, output 2 compressed",
+			serialized: hexToBytes("82b1030106070000ee8bd501094a7d5ca318da2506de35e" +
+				"1cb025ddc030f001aba76a9140cdf9941c0c221243cb8672cd1ad2c4c0933850588a" +
+				"c0000206a1e1a221182c26bbae681e4d96d452794e1951e70a208520000000000000" +
+				"054b5f466001abd76a9146c4f8b15918566534d134be7d7004b7f481bf36988ac"),
+			txOutIndex: 0,
+		}, {
+			name: "Output 2, coinbase, non-zero script version",
 			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     0,
-				height:     12345,
-				index:      1,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						amount:        20000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914e2ccd6ec7c6e2e581349c77e067385fa8236bf8a88ac"),
-						compressed:    false,
-					},
-					2: {
-						// Uncompressed Amount: 15000000
-						// Uncompressed PkScript: 76a914b8025be1b3efc63b0ad48e7f9f10e87544528d5888ac
-						amount: 137,
-
-						pkScript:   hexToBytes("00b8025be1b3efc63b0ad48e7f9f10e87544528d58"),
-						compressed: true,
-					},
-				},
+				amount: 100937281,
+				pkScript: hexToBytes("76a914da33f77cee27c2a975ed5124d7e4f7f9751351018" +
+					"8ac"),
+				blockHeight:   12345,
+				blockIndex:    1,
+				scriptVersion: 0xffff,
+				packedFlags: encodeUtxoFlags(
+					true,  // coinbase
+					false, // unspent
+					false, // not modified
+					false, // no expiry
+					stake.TxTypeRegular,
+				),
 			},
-			serialized: hexToBytes("01df3901000501120000e2ccd6ec7c6e2e581349c77e067385fa8236bf8a884f0000b8025be1b3efc63b0ad48e7f9f10e87544528d58"),
-		},
-		{
-			name: "outputs 0 and 2, not coinbase, output 2 compressed, packed indexes reversed",
+			serialized: hexToBytes("df39010182b095bf4182fe7f00da33f77cee27c2a975ed5" +
+				"124d7e4f7f975135101"),
+			txOutIndex: 2,
+		}, {
+			name: "Has expiry",
 			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     0,
-				height:     33333,
-				index:      21,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						amount:        20000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("76a914e2ccd6ec7c6e2e581349c77e067385fa8236bf8a88ac"),
-						compressed:    false,
-					},
-					2: {
-						// Uncompressed Amount: 15000000
-						// Uncompressed PkScript: 76a914b8025be1b3efc63b0ad48e7f9f10e87544528d5888ac
-						amount:        137,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("00b8025be1b3efc63b0ad48e7f9f10e87544528d58"),
-						compressed:    true,
-					},
-				},
+				amount: 20000000,
+				pkScript: hexToBytes("76a914e2ccd6ec7c6e2e581349c77e067385fa8236bf8a8" +
+					"8ac"),
+				blockHeight:   99999,
+				blockIndex:    3,
+				scriptVersion: 0,
+				packedFlags: encodeUtxoFlags(
+					false, // not coinbase
+					false, // unspent
+					false, // not modified
+					true,  // has expiry
+					stake.TxTypeRegular,
+				),
 			},
-			serialized: hexToBytes("0181833515000501120000e2ccd6ec7c6e2e581349c77e067385fa8236bf8a884f0000b8025be1b3efc63b0ad48e7f9f10e87544528d58"),
-		},
-		{
-			name: "Only output 0, coinbase, fully spent",
+			serialized: hexToBytes("858c1f0302120000e2ccd6ec7c6e2e581349c77e067385f" +
+				"a8236bf8a"),
+			txOutIndex: 0,
+		}, {
+			name: "Coinbase, spent",
 			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     0,
-				height:     33333,
-				index:      231,
-				sparseOutputs: map[uint32]*utxoOutput{
-					0: {
-						spent:         true,
-						amount:        5000000000,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("410496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858eeac"),
-						compressed:    false,
-					},
-				},
+				amount: 5000000000,
+				pkScript: hexToBytes("410496b538e853519c726a2c91e61ec11600ae1390813a6" +
+					"27c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621" +
+					"e73a82cbf2342c858eeac"),
+				blockHeight:   33333,
+				blockIndex:    3,
+				scriptVersion: 0,
+				packedFlags: encodeUtxoFlags(
+					true,  // coinbase
+					true,  // spent
+					false, // not modified
+					true,  // has expiry
+					stake.TxTypeRegular,
+				),
 			},
 			serialized: nil,
-		},
-		{
-			name: "Only output 22, not coinbase",
-			entry: &UtxoEntry{
-				txVersion:  1,
-				isCoinBase: false,
-				hasExpiry:  false,
-				txType:     0,
-				height:     3221,
-				index:      211,
-				sparseOutputs: map[uint32]*utxoOutput{
-					22: {
-						spent:         false,
-						amount:        366875659,
-						scriptVersion: 0,
-						pkScript:      hexToBytes("a9141dd46a006572d820e448e12d2bbb38640bc718e687"),
-						compressed:    false,
-					},
-				},
-			},
-			serialized: hexToBytes("019815805300080000108ba5b9e76300011dd46a006572d820e448e12d2bbb38640bc718e6"),
+			txOutIndex: 0,
 		},
 	}
 
@@ -1200,97 +1001,26 @@ func TestUtxoSerialization(t *testing.T) {
 			continue
 		}
 
-		// Don't try to deserialize if the test entry was fully spent
-		// since it will have a nil serialization.
-		if test.entry.IsFullySpent() {
+		// Don't try to deserialize if the test entry was spent since it will have a
+		// nil serialization.
+		if test.entry.IsSpent() {
+			if gotBytes != nil {
+				t.Errorf("serializeUtxoEntry #%d (%s): expected spent utxo "+
+					"serialization to be nil", i, test.name)
+			}
 			continue
 		}
 
-		// Deserialize to a utxo entry.
-		utxoEntry, err := deserializeUtxoEntry(test.serialized)
+		// Ensure that the serialized bytes are decoded back to the expected utxo.
+		gotUtxo, err := deserializeUtxoEntry(test.serialized, test.txOutIndex)
 		if err != nil {
-			t.Errorf("deserializeUtxoEntry #%d (%s) unexpected "+
-				"error: %v", i, test.name, err)
-			continue
-		}
-
-		// Ensure that the deserialized utxo entry has the same
-		// properties for the containing transaction and block height.
-		if utxoEntry.TxVersion() != test.entry.TxVersion() {
-			t.Errorf("deserializeUtxoEntry #%d (%s) mismatched "+
-				" txVersion: got %d, want %d", i, test.name,
-				utxoEntry.TxVersion(), test.entry.TxVersion())
-			continue
-		}
-		if utxoEntry.IsCoinBase() != test.entry.IsCoinBase() {
-			t.Errorf("deserializeUtxoEntry #%d (%s) mismatched "+
-				"coinbase flag: got %v, want %v", i, test.name,
-				utxoEntry.IsCoinBase(), test.entry.IsCoinBase())
-			continue
-		}
-		if utxoEntry.BlockHeight() != test.entry.BlockHeight() {
-			t.Errorf("deserializeUtxoEntry #%d (%s) mismatched "+
-				"block height: got %d, want %d", i, test.name,
-				utxoEntry.BlockHeight(),
-				test.entry.BlockHeight())
-			continue
-		}
-		if utxoEntry.IsFullySpent() != test.entry.IsFullySpent() {
-			t.Errorf("deserializeUtxoEntry #%d (%s) mismatched "+
-				"fully spent: got %v, want %v", i, test.name,
-				utxoEntry.IsFullySpent(),
-				test.entry.IsFullySpent())
+			t.Errorf("serializeUtxoEntry #%d (%s): unexpected error: %v", i,
+				test.name, err)
 			continue
 		}
-
-		// Ensure all of the outputs in the test entry match the
-		// spentness of the output in the deserialized entry and the
-		// deserialized entry does not contain any additional utxos.
-		var numUnspent int
-		for outputIndex := range test.entry.sparseOutputs {
-			gotSpent := utxoEntry.IsOutputSpent(outputIndex)
-			wantSpent := test.entry.IsOutputSpent(outputIndex)
-			if !wantSpent {
-				numUnspent++
-			}
-			if gotSpent != wantSpent {
-				t.Errorf("deserializeUtxoEntry #%d (%s) output "+
-					"#%d: mismatched spent: got %v, want "+
-					"%v", i, test.name, outputIndex,
-					gotSpent, wantSpent)
-				continue
-			}
-		}
-		if len(utxoEntry.sparseOutputs) != numUnspent {
-			t.Errorf("deserializeUtxoEntry #%d (%s): mismatched "+
-				"number of unspent outputs: got %d, want %d", i,
-				test.name, len(utxoEntry.sparseOutputs),
-				numUnspent)
-			continue
-		}
-
-		// Ensure all of the amounts and scripts of the utxos in the
-		// deserialized entry match the ones in the test entry.
-		for outputIndex := range utxoEntry.sparseOutputs {
-			gotAmount := utxoEntry.AmountByIndex(outputIndex)
-			wantAmount := test.entry.AmountByIndex(outputIndex)
-			if gotAmount != wantAmount {
-				t.Errorf("deserializeUtxoEntry #%d (%s) "+
-					"output #%d: mismatched amounts: got "+
-					"%d, want %d", i, test.name,
-					outputIndex, gotAmount, wantAmount)
-				continue
-			}
-
-			gotPkScript := utxoEntry.PkScriptByIndex(outputIndex)
-			wantPkScript := test.entry.PkScriptByIndex(outputIndex)
-			if !bytes.Equal(gotPkScript, wantPkScript) {
-				t.Errorf("deserializeUtxoEntry #%d (%s) "+
-					"output #%d mismatched scripts: got "+
-					"%x, want %x", i, test.name,
-					outputIndex, gotPkScript, wantPkScript)
-				continue
-			}
+		if !reflect.DeepEqual(gotUtxo, test.entry) {
+			t.Errorf("serializeUtxoEntry #%d (%s):\nwant: %+v\n got: %+v\n", i,
+				test.name, test.entry, gotUtxo)
 		}
 	}
 }
@@ -1303,39 +1033,34 @@ func TestUtxoEntryDeserializeErrors(t *testing.T) {
 	tests := []struct {
 		name       string
 		serialized []byte
+		txOutIndex uint32
 		errType    error
-	}{
-		{
-			name:       "no data after version",
-			serialized: hexToBytes("01"),
-			errType:    errDeserialize(""),
-		},
-		{
-			name:       "no data after block height",
-			serialized: hexToBytes("0101"),
-			errType:    errDeserialize(""),
-		},
-		{
-			name:       "no data after header code",
-			serialized: hexToBytes("010102"),
-			errType:    errDeserialize(""),
-		},
-		{
-			name:       "not enough bytes for unspentness bitmap",
-			serialized: hexToBytes("01017800"),
-			errType:    errDeserialize(""),
-		},
-		{
-			name:       "incomplete compressed txout",
-			serialized: hexToBytes("01010232"),
-			errType:    errDeserialize(""),
-		},
-	}
+	}{{
+		name:       "no data after block height",
+		serialized: hexToBytes("01"),
+		txOutIndex: 0,
+		errType:    errDeserialize(""),
+	}, {
+		name:       "no data after block index",
+		serialized: hexToBytes("0101"),
+		txOutIndex: 0,
+		errType:    errDeserialize(""),
+	}, {
+		name:       "no data after flags",
+		serialized: hexToBytes("010101"),
+		txOutIndex: 0,
+		errType:    errDeserialize(""),
+	}, {
+		name:       "incomplete compressed txout",
+		serialized: hexToBytes("01010123"),
+		txOutIndex: 0,
+		errType:    errDeserialize(""),
+	}}
 
 	for _, test := range tests {
 		// Ensure the expected error type is returned and the returned
 		// entry is nil.
-		entry, err := deserializeUtxoEntry(test.serialized)
+		entry, err := deserializeUtxoEntry(test.serialized, test.txOutIndex)
 		if !errors.As(err, &test.errType) {
 			t.Errorf("deserializeUtxoEntry (%s): expected error "+
 				"type does not match - got %T, want %T",
diff --git a/blockchain/compress.go b/blockchain/compress.go
index d6765a66eb..b8c6698eae 100644
--- a/blockchain/compress.go
+++ b/blockchain/compress.go
@@ -579,60 +579,35 @@ func decompressTxOutAmount(amount uint64) uint64 {
 // -----------------------------------------------------------------------------
 
 // compressedTxOutSize returns the number of bytes the passed transaction output
-// fields would take when encoded with the format described above.  The
-// preCompressed flag indicates the provided amount and script are already
-// compressed.  This is useful since loaded utxo entries are not decompressed
-// until the output is accessed.
+// fields would take when encoded with the format described above.
 func compressedTxOutSize(amount uint64, scriptVersion uint16, pkScript []byte,
-	compressionVersion uint32, preCompressed bool, hasAmount bool) int {
+	compressionVersion uint32, hasAmount bool) int {
+
 	scriptVersionSize := serializeSizeVLQ(uint64(scriptVersion))
-	if preCompressed && !hasAmount {
-		return scriptVersionSize + len(pkScript)
-	}
-	if preCompressed && hasAmount {
-		return scriptVersionSize + serializeSizeVLQ(compressTxOutAmount(amount)) +
-			len(pkScript)
-	}
-	if !preCompressed && !hasAmount {
+	if !hasAmount {
 		return scriptVersionSize + compressedScriptSize(scriptVersion,
 			pkScript, compressionVersion)
 	}
 
-	// if !preCompressed && hasAmount
 	return scriptVersionSize + serializeSizeVLQ(compressTxOutAmount(amount)) +
 		compressedScriptSize(scriptVersion, pkScript, compressionVersion)
 }
 
-// putCompressedTxOut potentially compresses the passed amount and script
-// according to their domain specific compression algorithms and encodes them
-// directly into the passed target byte slice with the format described above.
-// The preCompressed flag indicates the provided amount and script are already
-// compressed in which case the values are not modified.  This is useful since
-// loaded utxo entries are not decompressed until the output is accessed.  The
-// target byte slice must be at least large enough to handle the number of bytes
-// returned by the compressedTxOutSize function or it will panic.
+// putCompressedTxOut compresses the passed amount and script according to their
+// domain specific compression algorithms and encodes them directly into the
+// passed target byte slice with the format described above.  The target byte
+// slice must be at least large enough to handle the number of bytes returned by
+// the compressedTxOutSize function or it will panic.
 func putCompressedTxOut(target []byte, amount uint64, scriptVersion uint16,
-	pkScript []byte, compressionVersion uint32, preCompressed bool,
-	hasAmount bool) int {
-	if preCompressed && hasAmount {
-		offset := putVLQ(target, compressTxOutAmount(amount))
-		offset += putVLQ(target[offset:], uint64(scriptVersion))
-		copy(target[offset:], pkScript)
-		return offset + len(pkScript)
-	}
-	if preCompressed && !hasAmount {
-		offset := putVLQ(target, uint64(scriptVersion))
-		copy(target[offset:], pkScript)
-		return offset + len(pkScript)
-	}
-	if !preCompressed && !hasAmount {
+	pkScript []byte, compressionVersion uint32, hasAmount bool) int {
+
+	if !hasAmount {
 		offset := putVLQ(target, uint64(scriptVersion))
 		offset += putCompressedScript(target[offset:], scriptVersion, pkScript,
 			compressionVersion)
 		return offset
 	}
 
-	// if !preCompressed && hasAmount
 	offset := putVLQ(target, compressTxOutAmount(amount))
 	offset += putVLQ(target[offset:], uint64(scriptVersion))
 	offset += putCompressedScript(target[offset:], scriptVersion, pkScript,
@@ -641,10 +616,11 @@ func putCompressedTxOut(target []byte, amount uint64, scriptVersion uint16,
 }
 
 // decodeCompressedTxOut decodes the passed compressed txout, possibly followed
-// by other data, into its compressed amount and compressed script and returns
-// them along with the number of bytes they occupied.
+// by other data, into its uncompressed amount and script and returns them along
+// with the number of bytes they occupied prior to decompression.
 func decodeCompressedTxOut(serialized []byte, compressionVersion uint32,
 	hasAmount bool) (int64, uint16, []byte, int, error) {
+
 	var amount int64
 	var bytesRead int
 	var offset int
@@ -684,66 +660,50 @@ func decodeCompressedTxOut(serialized []byte, compressionVersion uint32,
 			scriptSize))
 	}
 
-	// Make a copy of the compressed script so the original serialized data
-	// can be released as soon as possible.
-	compressedScript := make([]byte, scriptSize)
-	copy(compressedScript, serialized[offset:offset+scriptSize])
+	// Decompress the script.
+	script := decompressScript(serialized[offset:offset+scriptSize],
+		compressionVersion)
 
-	return amount, uint16(scriptVersion), compressedScript,
-		offset + scriptSize, nil
+	return amount, uint16(scriptVersion), script, offset + scriptSize, nil
 }
 
-// -----------------------------------------------------------------------------
-// Decred specific transaction encoding flags
-//
-// Details about a transaction needed to determine how it may be spent
-// according to consensus rules are given by these flags.
+// txOutFlags defines additional information and state for transaction outputs.
+// This is used when serializing both unspent and spent transaction outputs.
 //
-// The following details are encoded into a single byte, where the index
-// of the bit is given in zeroeth order:
-//     0: Is coinbase
-//     1: Has an expiry
-//   2-4: Transaction type
-//     5: Unused
-//     6: Fully spent
-//     7: Unused
-//
-// 0, 1, and 6 are bit flags, while the transaction type is encoded with a bitmask
-// and used to describe the underlying int.
-//
-// The fully spent flag should always come as the *last* flag (highest bit index)
-// in this data type should flags be updated to include more rules in the future,
-// such as rules governing new script OP codes. This ensures that we may still use
-// these flags in the UTX serialized data without consequence, where the last
-// flag indicating fully spent will always be zeroed. Note that currently the
-// fully spent flag is stored in bit 6 so that when serializing the flags as a
-// VLQ integer it still fits into a single byte.
-//
-// -----------------------------------------------------------------------------
+// The bit representation is:
+//   bit  0     - containing transaction is a coinbase
+//   bit  1     - containing transaction has an expiry
+//   bits 2-5   - transaction type
+//   bits 6-7   - unused
+type txOutFlags uint8
 
 const (
-	// txTypeBitmask describes the bitmask that yields the 3rd, 4th and 5th
-	// bits from the flags byte.
-	txTypeBitmask = 0x1c
+	// txOutFlagCoinBase indicates that a txout was contained in a coinbase tx.
+	txOutFlagCoinBase = 1 << 0
+
+	// txOutFlagHasExpiry indicates that a txout was contained in a tx that included
+	// an expiry.
+	txOutFlagHasExpiry = 1 << 1
 
-	// txTypeShift is the number of bits to shift flags to the right to yield the
-	// correct integer value after applying the bitmask with AND.
-	txTypeShift = 2
+	// txOutFlagTxTypeBitmask describes the bitmask that yields bits 4-7 from
+	// txoFlags.
+	txOutFlagTxTypeBitmask = 0x3c
+
+	// txOutFlagTxTypeShift is the number of bits to shift txoFlags to the right
+	// to yield the correct integer value after applying the bitmask with AND.
+	txOutFlagTxTypeShift = 2
 )
 
 // encodeFlags encodes transaction flags into a single byte.
-func encodeFlags(isCoinBase bool, hasExpiry bool, txType stake.TxType, fullySpent bool) byte {
-	b := uint8(txType)
-	b <<= txTypeShift
+func encodeFlags(isCoinBase bool, hasExpiry bool, txType stake.TxType) txOutFlags {
+	b := txOutFlags(txType)
+	b <<= txOutFlagTxTypeShift
 
 	if isCoinBase {
-		b |= 0x01 // Set bit 0
+		b |= txOutFlagCoinBase
 	}
 	if hasExpiry {
-		b |= 0x02 // Set bit 1
-	}
-	if fullySpent {
-		b |= 0x40 // Set bit 6
+		b |= txOutFlagHasExpiry
 	}
 
 	return b
@@ -751,18 +711,12 @@ func encodeFlags(isCoinBase bool, hasExpiry bool, txType stake.TxType, fullySpen
 
 // decodeFlags decodes transaction flags from a single byte into their respective
 // data types.
-func decodeFlags(b byte) (bool, bool, stake.TxType, bool) {
-	isCoinBase := b&0x01 != 0
-	hasExpiry := b&(1<<1) != 0
-	fullySpent := b&(1<<6) != 0
-	txType := stake.TxType((b & txTypeBitmask) >> txTypeShift)
-
-	return isCoinBase, hasExpiry, txType, fullySpent
-}
+func decodeFlags(flags txOutFlags) (bool, bool, stake.TxType) {
+	isCoinBase := flags&txOutFlagCoinBase == txOutFlagCoinBase
+	hasExpiry := flags&txOutFlagHasExpiry == txOutFlagHasExpiry
+	txType := (flags & txOutFlagTxTypeBitmask) >> txOutFlagTxTypeShift
 
-// decodeFlagsFullySpent decodes whether or not a transaction was fully spent.
-func decodeFlagsFullySpent(b byte) bool {
-	return b&(1<<6) != 0
+	return isCoinBase, hasExpiry, stake.TxType(txType)
 }
 
 // absInt64 computes the absolute value of the given int64 and converts it into
diff --git a/blockchain/compress_test.go b/blockchain/compress_test.go
index 84af9ccef2..81885b9ea1 100644
--- a/blockchain/compress_test.go
+++ b/blockchain/compress_test.go
@@ -368,100 +368,66 @@ func TestCompressedTxOut(t *testing.T) {
 		amount        uint64
 		scriptVersion uint16
 		pkScript      []byte
-		compPkScript  []byte
 		version       uint32
 		compressed    []byte
 		hasAmount     bool
-		isCompressed  bool
 	}{
 		{
 			name:          "nulldata with 0 DCR",
 			amount:        0,
 			scriptVersion: 0,
 			pkScript:      hexToBytes("6a200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20"),
-			compPkScript:  hexToBytes("626a200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20"),
 			version:       1,
 			compressed:    hexToBytes("00626a200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20"),
 			hasAmount:     false,
-			isCompressed:  false,
 		},
 		{
 			name:          "pay-to-pubkey-hash dust, no amount",
 			amount:        0,
 			scriptVersion: 0,
 			pkScript:      hexToBytes("76a9141018853670f9f3b0582c5b9ee8ce93764ac32b9388ac"),
-			compPkScript:  hexToBytes("001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
 			version:       1,
 			compressed:    hexToBytes("00001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
 			hasAmount:     false,
-			isCompressed:  false,
-		},
-		{
-			name:          "pay-to-pubkey-hash dust, no amount, precompressed",
-			amount:        0,
-			scriptVersion: 0,
-			pkScript:      hexToBytes("001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-			compPkScript:  hexToBytes("001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-			version:       1,
-			compressed:    hexToBytes("00001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-			hasAmount:     false,
-			isCompressed:  true,
 		},
 		{
 			name:          "pay-to-pubkey-hash dust, amount",
 			amount:        546,
 			scriptVersion: 0,
 			pkScript:      hexToBytes("76a9141018853670f9f3b0582c5b9ee8ce93764ac32b9388ac"),
-			compPkScript:  hexToBytes("001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-			version:       1,
-			compressed:    hexToBytes("a52f00001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-			hasAmount:     true,
-			isCompressed:  false,
-		},
-		{
-			name:          "pay-to-pubkey-hash dust, amount, precompressed",
-			amount:        546,
-			scriptVersion: 0,
-			pkScript:      hexToBytes("001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
-			compPkScript:  hexToBytes("001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
 			version:       1,
 			compressed:    hexToBytes("a52f00001018853670f9f3b0582c5b9ee8ce93764ac32b93"),
 			hasAmount:     true,
-			isCompressed:  true,
 		},
 		{
 			name:          "pay-to-pubkey uncompressed, no amount",
 			amount:        0,
 			scriptVersion: 0,
 			pkScript:      hexToBytes("4104192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b40d45264838c0bd96852662ce6a847b197376830160c6d2eb5e6a4c44d33f453eac"),
-			compPkScript:  hexToBytes("04192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4"),
 			version:       1,
 			compressed:    hexToBytes("0004192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4"),
 			hasAmount:     false,
-			isCompressed:  false,
 		},
 		{
 			name:          "pay-to-pubkey uncompressed 1 DCR, amount present",
 			amount:        100000000,
 			scriptVersion: 0,
 			pkScript:      hexToBytes("4104192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b40d45264838c0bd96852662ce6a847b197376830160c6d2eb5e6a4c44d33f453eac"),
-			compPkScript:  hexToBytes("04192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4"),
 			version:       1,
 			compressed:    hexToBytes("090004192d74d0cb94344c9569c2e77901573d8d7903c3ebec3a957724895dca52c6b4"),
 			hasAmount:     true,
-			isCompressed:  false,
 		},
 	}
 
 	for _, test := range tests {
-		targetSz := compressedTxOutSize(0, test.scriptVersion, test.pkScript, currentCompressionVersion, test.isCompressed, test.hasAmount) - 1
+		targetSz := compressedTxOutSize(0, test.scriptVersion, test.pkScript, currentCompressionVersion, test.hasAmount) - 1
 		target := make([]byte, targetSz)
 		putCompressedScript(target, test.scriptVersion, test.pkScript, currentCompressionVersion)
 
 		// Ensure the function to calculate the serialized size without
 		// actually serializing the txout is calculated properly.
 		gotSize := compressedTxOutSize(test.amount, test.scriptVersion,
-			test.pkScript, test.version, test.isCompressed, test.hasAmount)
+			test.pkScript, test.version, test.hasAmount)
 		if gotSize != len(test.compressed) {
 			t.Errorf("compressedTxOutSize (%s): did not get "+
 				"expected size - got %d, want %d", test.name,
@@ -473,7 +439,7 @@ func TestCompressedTxOut(t *testing.T) {
 		gotCompressed := make([]byte, gotSize)
 		gotBytesWritten := putCompressedTxOut(gotCompressed,
 			test.amount, test.scriptVersion, test.pkScript,
-			test.version, test.isCompressed, test.hasAmount)
+			test.version, test.hasAmount)
 		if !bytes.Equal(gotCompressed, test.compressed) {
 			t.Errorf("compressTxOut (%s): did not get expected "+
 				"bytes - got %x, want %x", test.name,
@@ -510,10 +476,10 @@ func TestCompressedTxOut(t *testing.T) {
 				test.name, gotScrVersion, test.scriptVersion)
 			continue
 		}
-		if !bytes.Equal(gotScript, test.compPkScript) {
+		if !bytes.Equal(gotScript, test.pkScript) {
 			t.Errorf("decodeCompressedTxOut (%s): did not get "+
 				"expected script - got %x, want %x",
-				test.name, gotScript, test.compPkScript)
+				test.name, gotScript, test.pkScript)
 			continue
 		}
 		if gotBytesRead != len(test.compressed) {
@@ -522,21 +488,6 @@ func TestCompressedTxOut(t *testing.T) {
 				test.name, gotBytesRead, len(test.compressed))
 			continue
 		}
-
-		// Ensure the compressed values decompress to the expected
-		// txout.
-		gotScript = decompressScript(gotScript, test.version)
-		localScript := make([]byte, len(test.pkScript))
-		copy(localScript, test.pkScript)
-		if test.isCompressed {
-			localScript = decompressScript(localScript, test.version)
-		}
-		if !bytes.Equal(gotScript, localScript) {
-			t.Errorf("decompressTxOut (%s): did not get expected "+
-				"script - got %x, want %x", test.name,
-				gotScript, test.pkScript)
-			continue
-		}
 	}
 }
 
diff --git a/blockchain/error.go b/blockchain/error.go
index 6420f4234a..1c62fd45bd 100644
--- a/blockchain/error.go
+++ b/blockchain/error.go
@@ -392,11 +392,6 @@ const (
 	// more than it is allowed.
 	ErrBadStakebaseValue = ErrorKind("ErrBadStakebaseValue")
 
-	// ErrDiscordantTxTree specifies that a given origin tx's content
-	// indicated that it should exist in a different tx tree than the
-	// one given in the TxIn outpoint.
-	ErrDiscordantTxTree = ErrorKind("ErrDiscordantTxTree")
-
 	// ErrStakeFees indicates an error with the fees found in the stake
 	// transaction tree.
 	ErrStakeFees = ErrorKind("ErrStakeFees")
diff --git a/blockchain/error_test.go b/blockchain/error_test.go
index 96c0cab743..a8add038bc 100644
--- a/blockchain/error_test.go
+++ b/blockchain/error_test.go
@@ -102,7 +102,6 @@ func TestErrorKindStringer(t *testing.T) {
 		{ErrForceReorgWrongChain, "ErrForceReorgWrongChain"},
 		{ErrForceReorgMissingChild, "ErrForceReorgMissingChild"},
 		{ErrBadStakebaseValue, "ErrBadStakebaseValue"},
-		{ErrDiscordantTxTree, "ErrDiscordantTxTree"},
 		{ErrStakeFees, "ErrStakeFees"},
 		{ErrNoStakeTx, "ErrNoStakeTx"},
 		{ErrBadBlockHeight, "ErrBadBlockHeight"},
diff --git a/blockchain/fullblocktests/generate.go b/blockchain/fullblocktests/generate.go
index 6e4ee48def..3e6a01fe73 100644
--- a/blockchain/fullblocktests/generate.go
+++ b/blockchain/fullblocktests/generate.go
@@ -2014,7 +2014,7 @@ func Generate(includeLargeReorg bool) (tests [][]TestInstance, err error) {
 		tx.TxIn[0].PreviousOutPoint.Tree = wire.TxTreeStake
 		b.AddTransaction(tx)
 	})
-	rejected(blockchain.ErrDiscordantTxTree)
+	rejected(blockchain.ErrMissingTxOut)
 
 	// Create block with no dev subsidy for coinbase transaction.
 	//
diff --git a/blockchain/scriptval.go b/blockchain/scriptval.go
index 7647f1b854..cf8677280b 100644
--- a/blockchain/scriptval.go
+++ b/blockchain/scriptval.go
@@ -56,48 +56,34 @@ out:
 			break out
 
 		case txVI := <-v.validateChan:
-			// Ensure the referenced input transaction is available.
+			// Ensure the referenced input utxo is available.
 			txIn := txVI.txIn
-			originTxHash := &txIn.PreviousOutPoint.Hash
-			originTxIndex := txIn.PreviousOutPoint.Index
-			txEntry := v.utxoView.LookupEntry(originTxHash)
-			if txEntry == nil {
-				str := fmt.Sprintf("unable to find input "+
-					"transaction %v referenced from "+
-					"transaction %v", originTxHash,
-					txVI.tx.Hash())
-				err := ruleError(ErrMissingTxOut, str)
-				v.sendResult(ctx, err)
-				break out
-			}
-
-			// Ensure the referenced input transaction public key
-			// script is available.
-			pkScript := txEntry.PkScriptByIndex(originTxIndex)
-			if pkScript == nil {
+			utxo := v.utxoView.LookupEntry(txIn.PreviousOutPoint)
+			if utxo == nil {
 				str := fmt.Sprintf("unable to find unspent "+
-					"output %v script referenced from "+
+					"output %v referenced from "+
 					"transaction %s:%d",
 					txIn.PreviousOutPoint, txVI.tx.Hash(),
 					txVI.txInIndex)
-				err := ruleError(ErrBadTxInput, str)
+				err := ruleError(ErrMissingTxOut, str)
 				v.sendResult(ctx, err)
 				break out
 			}
 
 			// Create a new script engine for the script pair.
 			sigScript := txIn.SignatureScript
-			version := txEntry.ScriptVersionByIndex(originTxIndex)
+			version := utxo.ScriptVersion()
+			pkScript := utxo.PkScript()
 
 			vm, err := txscript.NewEngine(pkScript, txVI.tx.MsgTx(),
 				txVI.txInIndex, v.flags, version, v.sigCache)
 			if err != nil {
 				str := fmt.Sprintf("failed to parse input "+
-					"%s:%d which references output %s:%d - "+
+					"%s:%d which references output %v - "+
 					"%v (input script bytes %x, prev output "+
 					"script bytes %x)", txVI.tx.Hash(),
-					txVI.txInIndex, originTxHash,
-					originTxIndex, err, sigScript, pkScript)
+					txVI.txInIndex, txIn.PreviousOutPoint,
+					err, sigScript, pkScript)
 				err := ruleError(ErrScriptMalformed, str)
 				v.sendResult(ctx, err)
 				break out
@@ -106,11 +92,11 @@ out:
 			// Execute the script pair.
 			if err := vm.Execute(); err != nil {
 				str := fmt.Sprintf("failed to validate input "+
-					"%s:%d which references output %s:%d - "+
+					"%s:%d which references output %v - "+
 					"%v (input script bytes %x, prev output "+
 					"script bytes %x)", txVI.tx.Hash(),
-					txVI.txInIndex, originTxHash,
-					originTxIndex, err, sigScript, pkScript)
+					txVI.txInIndex, txIn.PreviousOutPoint,
+					err, sigScript, pkScript)
 				err := ruleError(ErrScriptValidation, str)
 				v.sendResult(ctx, err)
 				break out
diff --git a/blockchain/sequencelock.go b/blockchain/sequencelock.go
index 622a86be41..8341774356 100644
--- a/blockchain/sequencelock.go
+++ b/blockchain/sequencelock.go
@@ -69,7 +69,7 @@ func (b *BlockChain) calcSequenceLock(node *blockNode, tx *dcrutil.Tx, view *Utx
 			continue
 		}
 
-		utxo := view.LookupEntry(&txIn.PreviousOutPoint.Hash)
+		utxo := view.LookupEntry(txIn.PreviousOutPoint)
 		if utxo == nil {
 			str := fmt.Sprintf("output %v referenced from "+
 				"transaction %s:%d either does not exist or "+
diff --git a/blockchain/stakeext.go b/blockchain/stakeext.go
index e486339bc3..244ba69447 100644
--- a/blockchain/stakeext.go
+++ b/blockchain/stakeext.go
@@ -10,6 +10,7 @@ import (
 	"github.com/decred/dcrd/database/v2"
 	"github.com/decred/dcrd/dcrutil/v4"
 	"github.com/decred/dcrd/txscript/v4"
+	"github.com/decred/dcrd/wire"
 )
 
 // NextLotteryData returns the next tickets eligible for spending as SSGen
@@ -110,15 +111,14 @@ func (b *BlockChain) TicketsWithAddress(address dcrutil.Address, isTreasuryEnabl
 	var ticketsWithAddr []chainhash.Hash
 	err := b.db.View(func(dbTx database.Tx) error {
 		for _, hash := range tickets {
-			utxo, err := dbFetchUtxoEntry(dbTx, &hash)
+			outpoint := wire.OutPoint{Hash: hash, Index: 0, Tree: wire.TxTreeStake}
+			utxo, err := dbFetchUtxoEntry(dbTx, outpoint)
 			if err != nil {
 				return err
 			}
 
-			_, addrs, _, err :=
-				txscript.ExtractPkScriptAddrs(utxo.ScriptVersionByIndex(0),
-					utxo.PkScriptByIndex(0), b.chainParams,
-					isTreasuryEnabled)
+			_, addrs, _, err := txscript.ExtractPkScriptAddrs(utxo.ScriptVersion(),
+				utxo.PkScript(), b.chainParams, isTreasuryEnabled)
 			if err != nil {
 				return err
 			}
@@ -223,12 +223,13 @@ func (b *BlockChain) TicketPoolValue() (dcrutil.Amount, error) {
 	var amt int64
 	err := b.db.View(func(dbTx database.Tx) error {
 		for _, hash := range sn.LiveTickets() {
-			utxo, err := dbFetchUtxoEntry(dbTx, &hash)
+			outpoint := wire.OutPoint{Hash: hash, Index: 0, Tree: wire.TxTreeStake}
+			utxo, err := dbFetchUtxoEntry(dbTx, outpoint)
 			if err != nil {
 				return err
 			}
 
-			amt += utxo.sparseOutputs[0].amount
+			amt += utxo.Amount()
 		}
 		return nil
 	})
diff --git a/blockchain/upgrade.go b/blockchain/upgrade.go
index 5bd38cc488..61c4544f75 100644
--- a/blockchain/upgrade.go
+++ b/blockchain/upgrade.go
@@ -496,7 +496,7 @@ type scriptSource map[wire.OutPoint]scriptSourceEntry
 // PrevScript returns the script and script version associated with the provided
 // previous outpoint along with a bool that indicates whether or not the
 // requested entry exists.  This ensures the caller is able to distinguish
-// between missing entry and empty v0 scripts.
+// between missing entries and empty v0 scripts.
 func (s scriptSource) PrevScript(prevOut *wire.OutPoint) (uint16, []byte, bool) {
 	entry, ok := s[*prevOut]
 	if !ok {
@@ -1789,6 +1789,1162 @@ func upgradeToVersion8(ctx context.Context, db database.DB, dbInfo *databaseInfo
 	return nil
 }
 
+// migrateUtxoSetVersion2To3 migrates all utxoset entries from the v2 bucket to
+// a v3 bucket and removes the old v2 bucket.
+//
+// The utxoset is guaranteed to be fully updated if this returns without
+// failure.
+func migrateUtxoSetVersion2To3(ctx context.Context, db database.DB) error {
+	// Hardcoded bucket and key names so updates do not affect old upgrades.
+	v2BucketName := []byte("utxosetv2")
+	v3BucketName := []byte("utxosetv3")
+
+	log.Info("Migrating database utxoset.  This may take a while...")
+	start := time.Now()
+
+	// Create the new utxoset bucket as needed.
+	err := db.Update(func(dbTx database.Tx) error {
+		_, err := dbTx.Metadata().CreateBucketIfNotExists(v3BucketName)
+		return err
+	})
+	if err != nil {
+		return err
+	}
+
+	// doBatch contains the primary logic for upgrading the utxoset from version
+	// 2 to 3 in batches.  This is done because attempting to migrate in a
+	// single database transaction could result in massive memory usage and
+	// could potentially crash on many systems due to ulimits.
+	//
+	// It returns whether or not all entries have been updated.
+	const maxEntries = 20000
+	var resumeOffset uint32
+	var totalMigrated uint64
+	doBatch := func(dbTx database.Tx) (bool, error) {
+		meta := dbTx.Metadata()
+		v2Bucket := meta.Bucket(v2BucketName)
+		if v2Bucket == nil {
+			return false, fmt.Errorf("bucket %s does not exist", v2BucketName)
+		}
+
+		v3Bucket := meta.Bucket(v3BucketName)
+		if v3Bucket == nil {
+			return false, fmt.Errorf("bucket %s does not exist", v3BucketName)
+		}
+
+		// Migrate utxoset entries so long as the max number of entries for this
+		// batch has not been exceeded.
+		var logProgress bool
+		var numMigrated, numIterated uint32
+		err := v2Bucket.ForEach(func(oldKey, oldSerialized []byte) error {
+			if interruptRequested(ctx) {
+				logProgress = true
+				return errInterruptRequested
+			}
+
+			if numMigrated >= maxEntries {
+				logProgress = true
+				return errBatchFinished
+			}
+
+			// Skip entries that have already been migrated in previous batches.
+			numIterated++
+			if numIterated-1 < resumeOffset {
+				return nil
+			}
+			resumeOffset++
+
+			// Old key was the transaction hash.
+			var txHash chainhash.Hash
+			copy(txHash[:], oldKey)
+
+			// Deserialize the legacy V2 entry which included all utxos for the given
+			// transaction.
+			//
+			// The legacy V2 format is as follows:
+			//
+			//   <version><height><header code><unspentness bitmap>
+			//	 [<compressed txouts>,...]
+			//
+			//   Field                 Type     Size
+			//   transaction version   VLQ      variable
+			//   block height          VLQ      variable
+			//   block index           VLQ      variable
+			//   flags                 VLQ      variable (currently 1 byte)
+			//   header code           VLQ      variable
+			//   unspentness bitmap    []byte   variable
+			//   compressed txouts
+			//     compressed amount   VLQ      variable
+			//     compressed version  VLQ      variable
+			//     compressed script   []byte   variable
+			//   stakeExtra            []byte   variable
+			//
+			// The serialized flags code format is:
+			//   bit  0   - containing transaction is a coinbase
+			//   bit  1   - containing transaction has an expiry
+			//   bits 2-4 - transaction type
+			//   bit  5   - unused
+			//   bit  6   - is fully spent
+			//   bit  7   - unused
+			//
+			// The serialized header code format is:
+			//   bit 0 - output zero is unspent
+			//   bit 1 - output one is unspent
+			//   bits 2-x - number of bytes in unspentness bitmap.  When both bits 1
+			//     and 2 are unset, it encodes N-1 since there must be at least one
+			//     unspent output.
+			//
+			// The stake extra field contains minimally encoded outputs for all
+			// consensus-related outputs in the stake transaction. It is only
+			// encoded for tickets.
+
+			// Deserialize the version.
+			//
+			// NOTE: Ignore version since it is no longer used in the new format.
+			_, bytesRead := deserializeVLQ(oldSerialized)
+			offset := bytesRead
+			if offset >= len(oldSerialized) {
+				return errDeserialize("unexpected end of data after version")
+			}
+
+			// Deserialize the block height.
+			blockHeight, bytesRead := deserializeVLQ(oldSerialized[offset:])
+			offset += bytesRead
+			if offset >= len(oldSerialized) {
+				return errDeserialize("unexpected end of data after height")
+			}
+
+			// Deserialize the block index.
+			blockIndex, bytesRead := deserializeVLQ(oldSerialized[offset:])
+			offset += bytesRead
+			if offset >= len(oldSerialized) {
+				return errDeserialize("unexpected end of data after index")
+			}
+
+			// Deserialize the flags.
+			flags, bytesRead := deserializeVLQ(oldSerialized[offset:])
+			offset += bytesRead
+			if offset >= len(oldSerialized) {
+				return errDeserialize("unexpected end of data after flags")
+			}
+			// Decode the flags.  The format is:
+			//     0: Is coinbase
+			//     1: Has an expiry
+			//   2-4: Transaction type
+			//     5: Unused
+			//     6: Fully spent
+			//     7: Unused
+			isCoinBase := flags&0x01 != 0
+			hasExpiry := flags&(1<<1) != 0
+			txType := stake.TxType((flags & 0x1c) >> 2)
+
+			// Deserialize the header code.
+			code, bytesRead := deserializeVLQ(oldSerialized[offset:])
+			offset += bytesRead
+			if offset >= len(oldSerialized) {
+				return errDeserialize("unexpected end of data after header")
+			}
+
+			// Decode the header code.
+			//
+			// Bit 0 indicates output 0 is unspent.
+			// Bit 1 indicates output 1 is unspent.
+			// Bits 2-x encodes the number of non-zero unspentness bitmap bytes that
+			// follow.  When both output 0 and 1 are spent, it encodes N-1.
+			output0Unspent := code&0x01 != 0
+			output1Unspent := code&0x02 != 0
+			numBitmapBytes := code >> 2
+			if !output0Unspent && !output1Unspent {
+				numBitmapBytes++
+			}
+
+			// Ensure there are enough bytes left to deserialize the unspentness
+			// bitmap.
+			if uint64(len(oldSerialized[offset:])) < numBitmapBytes {
+				return errDeserialize("unexpected end of data for " +
+					"unspentness bitmap")
+			}
+
+			// Add sparse outputs for unspent outputs 0 and 1 as needed based on the
+			// details provided by the header code.
+			var outputIndexes []uint32
+			if output0Unspent {
+				outputIndexes = append(outputIndexes, 0)
+			}
+			if output1Unspent {
+				outputIndexes = append(outputIndexes, 1)
+			}
+
+			// Decode the unspentness bitmap adding a sparse output for each unspent
+			// output.
+			for i := uint32(0); i < uint32(numBitmapBytes); i++ {
+				unspentBits := oldSerialized[offset]
+				for j := uint32(0); j < 8; j++ {
+					if unspentBits&0x01 != 0 {
+						// The first 2 outputs are encoded via the
+						// header code, so adjust the output number
+						// accordingly.
+						outputNum := 2 + i*8 + j
+						outputIndexes = append(outputIndexes, outputNum)
+					}
+					unspentBits >>= 1
+				}
+				offset++
+			}
+
+			// Create a map to hold all of the converted outputs for the entry.
+			type convertedOut struct {
+				compressedAmount uint64
+				compressedScript []byte
+				scriptVersion    uint64
+			}
+			outputs := make(map[uint32]*convertedOut)
+
+			// Decode and add all of the outputs.
+			for _, outputIndex := range outputIndexes {
+				// Deserialize the compressed amount and ensure there are bytes
+				// remaining for the compressed script.
+				compressedAmount, bytesRead := deserializeVLQ(oldSerialized[offset:])
+				if bytesRead == 0 {
+					return errDeserialize("unexpected end of data during decoding " +
+						"(compressed amount)")
+				}
+				offset += bytesRead
+
+				// Decode the script version.
+				scriptVersion, bytesRead := deserializeVLQ(oldSerialized[offset:])
+				if bytesRead == 0 {
+					return errDeserialize("unexpected end of data during decoding " +
+						"(script version)")
+				}
+				offset += bytesRead
+
+				// Decode the compressed script size and ensure there are enough bytes
+				// left in the slice for it.
+				const compressionVersion = 1
+				scriptSize := decodeCompressedScriptSize(oldSerialized[offset:],
+					compressionVersion)
+				// Note: scriptSize == 0 is OK (an empty compressed script is valid)
+				if scriptSize < 0 {
+					return errDeserialize("negative script size")
+				}
+				if len(oldSerialized[offset:]) < scriptSize {
+					return errDeserialize(fmt.Sprintf("unexpected end of "+
+						"data after script size (got %v, need %v)",
+						len(oldSerialized[offset:]), scriptSize))
+				}
+				compressedScript := make([]byte, scriptSize)
+				copy(compressedScript, oldSerialized[offset:offset+scriptSize])
+				offset += scriptSize
+
+				// Create a converted utxo entry with the details deserialized above.
+				outputs[outputIndex] = &convertedOut{
+					compressedAmount: compressedAmount,
+					compressedScript: compressedScript,
+					scriptVersion:    scriptVersion,
+				}
+			}
+
+			// Copy the stake extra data if this was a ticket.
+			var ticketMinOuts []byte
+			if txType == stake.TxTypeSStx {
+				ticketMinOuts = make([]byte, len(oldSerialized[offset:]))
+				copy(ticketMinOuts, oldSerialized[offset:])
+			}
+
+			// Create V3 utxo entries with the details deserialized above.
+			//
+			// The V3 serialized key format is:
+			//
+			//   <hash><output index><tree>
+			//
+			//   Field                Type             Size
+			//   hash                 chainhash.Hash   chainhash.HashSize
+			//   output index         VLQ              variable
+			//   tree                 VLQ              variable
+			//
+			// The V3 serialized value format is:
+			//
+			//   <block height><block index><flags><compressed txout>
+			//   OPTIONAL: [<ticket min outs>]
+			//
+			//   Field                Type     Size
+			//   block height         VLQ      variable
+			//   block index          VLQ      variable
+			//   flags                VLQ      variable
+			//   compressed txout
+			//     compressed amount   VLQ      variable
+			//     compressed version  VLQ      variable
+			//     compressed script   []byte   variable
+			//
+			//   OPTIONAL
+			//     ticketMinOuts      []byte         variable
+			//
+			// The serialized flags format is:
+			//   bit  0     - containing transaction is a coinbase
+			//   bit  1     - containing transaction has an expiry
+			//   bits 2-5   - transaction type
+			//   bits 6-7   - unused
+			//
+			// The ticket min outs field contains minimally encoded outputs for all
+			// outputs of a ticket transaction. It is only encoded for ticket outputs.
+			for outputIndex, output := range outputs {
+				// Encode the V3 utxo flags.
+				encodedFlags := uint8(txType) << 2
+				if isCoinBase {
+					encodedFlags |= 1
+				}
+				if hasExpiry {
+					encodedFlags |= 1 << 1
+				}
+
+				// Calculate the size needed to serialize the entry.
+				size := serializeSizeVLQ(blockHeight) +
+					serializeSizeVLQ(blockIndex) +
+					serializeSizeVLQ(uint64(encodedFlags)) +
+					serializeSizeVLQ(output.compressedAmount) +
+					serializeSizeVLQ(output.scriptVersion) +
+					len(output.compressedScript)
+
+				// Only store the ticket minimal outputs in the ticket submission
+				// output (output index 0).
+				if outputIndex == 0 {
+					size += len(ticketMinOuts)
+				}
+
+				// Serialize the entry.
+				reserialized := make([]byte, size)
+				reserializedOffset := putVLQ(reserialized, blockHeight)
+				reserializedOffset += putVLQ(reserialized[reserializedOffset:],
+					blockIndex)
+				reserializedOffset += putVLQ(reserialized[reserializedOffset:],
+					uint64(encodedFlags))
+				reserializedOffset += putVLQ(reserialized[reserializedOffset:],
+					output.compressedAmount)
+				reserializedOffset += putVLQ(reserialized[reserializedOffset:],
+					output.scriptVersion)
+				copy(reserialized[reserializedOffset:], output.compressedScript)
+				reserializedOffset += len(output.compressedScript)
+
+				// Only store the ticket minimal outputs in the ticket submission
+				// output (output index 0).
+				if ticketMinOuts != nil && outputIndex == 0 {
+					copy(reserialized[reserializedOffset:], ticketMinOuts)
+				}
+
+				// Create the key for the new entry.
+				tree := wire.TxTreeRegular
+				if txType != stake.TxTypeRegular {
+					tree = wire.TxTreeStake
+				}
+				keySize := chainhash.HashSize + serializeSizeVLQ(uint64(outputIndex)) +
+					serializeSizeVLQ(uint64(tree))
+				key := make([]byte, keySize)
+				copy(key, txHash[:])
+				keyOffset := chainhash.HashSize
+				keyOffset += putVLQ(key[keyOffset:], uint64(outputIndex))
+				putVLQ(key[keyOffset:], uint64(tree))
+
+				// Create the new entry in the V3 bucket.
+				err = v3Bucket.Put(key, reserialized)
+				if err != nil {
+					return err
+				}
+			}
+
+			numMigrated++
+			return nil
+		})
+		isFullyDone := err == nil
+		if (isFullyDone || logProgress) && numMigrated > 0 {
+			totalMigrated += uint64(numMigrated)
+			log.Infof("Migrated %d entries (%d total)", numMigrated,
+				totalMigrated)
+		}
+		return isFullyDone, err
+	}
+
+	// Migrate all entries in batches for the reasons mentioned above.
+	if err := batchedUpdate(ctx, db, doBatch); err != nil {
+		return err
+	}
+
+	elapsed := time.Since(start).Round(time.Millisecond)
+	log.Infof("Done migrating utxoset.  Total entries: %d in %v", totalMigrated,
+		elapsed)
+
+	if interruptRequested(ctx) {
+		return errInterruptRequested
+	}
+
+	// Drop version 2 utxoset.
+	log.Info("Removing old utxoset entries...")
+	start = time.Now()
+	err = incrementalFlatDrop(ctx, db, v2BucketName, "old utxoset")
+	if err != nil {
+		return err
+	}
+	elapsed = time.Since(start).Round(time.Millisecond)
+	log.Infof("Done removing old utxoset entries in %v", elapsed)
+	return nil
+}
+
+// migrateSpendJournalVersion2To3 migrates all spend journal entries from the v2
+// bucket to a v3 bucket and removes the old v2 bucket.
+//
+// The spend journal entries are guaranteed to be fully updated if this returns
+// without failure.
+func migrateSpendJournalVersion2To3(ctx context.Context, b *BlockChain) error {
+	// Hardcoded bucket and key names so updates do not affect old upgrades.
+	v2SpendJournalBucketName := []byte("spendjournalv2")
+	v3SpendJournalBucketName := []byte("spendjournalv3")
+	v3BlockIndexBucketName := []byte("blockidxv3")
+	v3UtxoSetBucketName := []byte("utxosetv3")
+	tmpTxInfoBucketName := []byte("tmpTxInfo")
+
+	log.Info("Migrating database spend journal.  This may take a while...")
+	start := time.Now()
+
+	// Create the new spend journal bucket as needed.
+	err := b.db.Update(func(dbTx database.Tx) error {
+		_, err := dbTx.Metadata().CreateBucketIfNotExists(v3SpendJournalBucketName)
+		return err
+	})
+	if err != nil {
+		return err
+	}
+
+	// Create the temp bucket as needed.  This bucket is used to temporarily store
+	// tx info for fully spent transactions.
+	err = b.db.Update(func(dbTx database.Tx) error {
+		_, err := dbTx.Metadata().CreateBucketIfNotExists(tmpTxInfoBucketName)
+		return err
+	})
+	if err != nil {
+		return err
+	}
+
+	// doBatch contains the primary logic for upgrading the spend journal from
+	// version 2 to 3 in batches.  This is done because attempting to migrate in a
+	// single database transaction could result in massive memory usage and
+	// could potentially crash on many systems due to ulimits.
+	//
+	// It returns whether or not all entries have been updated.
+	const maxEntries = 20000
+	var resumeOffset uint32
+	var totalMigrated uint64
+	doBatch := func(dbTx database.Tx) (bool, error) {
+		meta := dbTx.Metadata()
+
+		v2SpendJournalBucket := meta.Bucket(v2SpendJournalBucketName)
+		if v2SpendJournalBucket == nil {
+			return false, fmt.Errorf("bucket %s does not exist",
+				v2SpendJournalBucketName)
+		}
+
+		v3SpendJournalBucket := meta.Bucket(v3SpendJournalBucketName)
+		if v3SpendJournalBucket == nil {
+			return false, fmt.Errorf("bucket %s does not exist",
+				v3SpendJournalBucketName)
+		}
+
+		v3BlockIndexBucket := meta.Bucket(v3BlockIndexBucketName)
+		if v3BlockIndexBucket == nil {
+			return false, fmt.Errorf("bucket %s does not exist",
+				v3BlockIndexBucketName)
+		}
+
+		v3UtxoSetBucket := meta.Bucket(v3UtxoSetBucketName)
+		if v3UtxoSetBucket == nil {
+			return false, fmt.Errorf("bucket %s does not exist",
+				v3UtxoSetBucketName)
+		}
+
+		tmpTxInfoBucket := meta.Bucket(tmpTxInfoBucketName)
+		if tmpTxInfoBucket == nil {
+			return false, fmt.Errorf("bucket %s does not exist",
+				tmpTxInfoBucketName)
+		}
+
+		// Migrate spend journal entries so long as the max number of entries for
+		// this batch has not been exceeded.
+		//
+		// Use the block index to iterate through every block in reverse order.  It
+		// is necessary to read the blocks in reverse order since the V2 spend
+		// journal conditionally stored tx info when the output was the last spent
+		// output of the containing transaction.  Therefore, we need to find the
+		// last spent outputs first and temporarily store the associated tx info so
+		// that it is available when creating the corresponding V3 entries.
+		var logProgress bool
+		var numMigrated, numIterated uint32
+		cursor := v3BlockIndexBucket.Cursor()
+		for ok := cursor.Last(); ok; ok = cursor.Prev() {
+			// Reset err on each iteration.
+			err = nil
+
+			if interruptRequested(ctx) {
+				logProgress = true
+				err = errInterruptRequested
+				break
+			}
+
+			if numMigrated >= maxEntries {
+				logProgress = true
+				err = errBatchFinished
+				break
+			}
+
+			// Skip entries that have already been migrated in previous batches.
+			numIterated++
+			if numIterated-1 < resumeOffset {
+				continue
+			}
+			resumeOffset++
+
+			// Deserialize the header from the V3 block index entry.  The header is
+			// the first item in the serialized entry.
+			serializedBlockIndexEntry := cursor.Value()
+			if len(serializedBlockIndexEntry) < blockHdrSize {
+				return false, errDeserialize("unexpected end of data while " +
+					"reading block header")
+			}
+			hB := serializedBlockIndexEntry[0:blockHdrSize]
+			var header wire.BlockHeader
+			if err := header.Deserialize(bytes.NewReader(hB)); err != nil {
+				return false, err
+			}
+
+			// Skip entries that have already been migrated in previous interrupted
+			// upgrades.
+			blockHash := header.BlockHash()
+			if v3SpendJournalBucket.Get(blockHash[:]) != nil {
+				continue
+			}
+
+			// Load the full block from the database.
+			blockBytes, err := dbTx.FetchBlock(&blockHash)
+			if err != nil {
+				break
+			}
+			var msgBlock wire.MsgBlock
+			if err = msgBlock.FromBytes(blockBytes); err != nil {
+				break
+			}
+
+			// Determine if treasury agenda is active.
+			isTreasuryEnabled := false
+			if msgBlock.Header.Height > 0 {
+				parentHash := msgBlock.Header.PrevBlock
+				isTreasuryEnabled, err = b.IsTreasuryAgendaActive(&parentHash)
+				if err != nil {
+					break
+				}
+			}
+
+			// Deserialize the legacy V2 spend journal entry.
+			//
+			// The legacy V2 format is as follows:
+			//
+			//   [<flags><script version><compressed pk script>],...
+			//   OPTIONAL: [<txVersion><stakeExtra>]
+			//
+			//   Field                Type           Size
+			//   flags                VLQ            byte
+			//   scriptVersion        uint16         2 bytes
+			//   pkScript             VLQ+[]byte     variable
+			//
+			//   OPTIONAL
+			//     txVersion          VLQ            variable
+			//     stakeExtra         []byte         variable
+			//
+			// The serialized flags code format is:
+			//   bit  0   - containing transaction is a coinbase
+			//   bit  1   - containing transaction has an expiry
+			//   bits 2-4 - transaction type
+			//   bit  5   - unused
+			//   bit  6   - is fully spent
+			//   bit  7   - unused
+			//
+			// The stake extra field contains minimally encoded outputs for all
+			// consensus-related outputs in the stake transaction. It is only
+			// encoded for tickets.
+			//
+			//   NOTE: The transaction version and flags are only encoded when the
+			//   spent txout was the final unspent output of the containing
+			//   transaction.  Otherwise, the header code will be 0 and the version is
+			//   not serialized at all. This is done because that information is only
+			//   needed when the utxo set no longer has it.
+
+			// Get the serialized V2 data.
+			v2Serialized := v2SpendJournalBucket.Get(blockHash[:])
+
+			// Exclude the coinbase transaction since it can't spend anything.
+			blockTxns := make([]*wire.MsgTx, 0, len(msgBlock.STransactions)+
+				len(msgBlock.Transactions[1:]))
+			if len(msgBlock.STransactions) > 0 && isTreasuryEnabled {
+				// Skip treasury base and remove tspends.
+				for _, v := range msgBlock.STransactions[1:] {
+					if stake.IsTSpend(v) {
+						continue
+					}
+					blockTxns = append(blockTxns, v)
+				}
+			} else {
+				blockTxns = append(blockTxns, msgBlock.STransactions...)
+			}
+			blockTxns = append(blockTxns, msgBlock.Transactions[1:]...)
+			if len(blockTxns) > 0 && len(v2Serialized) == 0 {
+				panicf("missing spend journal data for %s", msgBlock.BlockHash())
+			}
+
+			// Calculate the total number of stxos.
+			var numStxos int
+			for _, tx := range blockTxns {
+				if stake.IsSSGen(tx, isTreasuryEnabled) {
+					numStxos++
+					continue
+				}
+				numStxos += len(tx.TxIn)
+			}
+
+			// When a block has no spent txouts there is nothing to serialize.
+			if len(v2Serialized) == 0 {
+				// Ensure the block actually has no stxos.  This should never
+				// happen unless there is database corruption or an empty entry
+				// erroneously made its way into the database.
+				if numStxos != 0 {
+					return false, AssertError(fmt.Sprintf("mismatched spend "+
+						"journal serialization - no serialization for "+
+						"expected %d stxos", numStxos))
+				}
+
+				continue
+			}
+
+			// Create a slice to hold all of the converted stxos.
+			type convertedStxo struct {
+				compScript    []byte
+				ticketMinOuts []byte
+				scriptVersion uint16
+				flags         uint8
+				txOutIndex    uint32
+			}
+			stxos := make([]convertedStxo, numStxos)
+
+			// Loop backwards through all transactions so everything is read in
+			// reverse order to match the serialization order.
+			stxoIdx := numStxos - 1
+			offset := 0
+			for txIdx := len(blockTxns) - 1; txIdx > -1; txIdx-- {
+				tx := blockTxns[txIdx]
+				isVote := stake.IsSSGen(tx, isTreasuryEnabled)
+
+				// Loop backwards through all of the transaction inputs and read
+				// the associated stxo.
+				for txInIdx := len(tx.TxIn) - 1; txInIdx > -1; txInIdx-- {
+					// Skip stakebase since it has no input.
+					if txInIdx == 0 && isVote {
+						continue
+					}
+
+					txIn := tx.TxIn[txInIdx]
+					stxo := &stxos[stxoIdx]
+					stxoIdx--
+
+					// Set the tx out index that the stxo is associated with.
+					stxo.txOutIndex = txIn.PreviousOutPoint.Index
+
+					// Deserialize the flags.
+					flags, bytesRead := deserializeVLQ(v2Serialized[offset:])
+					if bytesRead == 0 {
+						return false, errDeserialize("unexpected end of data during " +
+							"decoding (flags)")
+					}
+					offset += bytesRead
+
+					// Decode the script version.
+					scriptVersion, bytesRead := deserializeVLQ(v2Serialized[offset:])
+					if bytesRead == 0 {
+						return false, errDeserialize("unexpected end of " +
+							"data during decoding (script version)")
+					}
+					offset += bytesRead
+					stxo.scriptVersion = uint16(scriptVersion)
+
+					// Decode the compressed script size and ensure there are enough bytes
+					// left in the slice for it.
+					const compressionVersion = 1
+					scriptSize := decodeCompressedScriptSize(v2Serialized[offset:],
+						compressionVersion)
+					// Note: scriptSize == 0 is OK (an empty compressed script is valid)
+					if scriptSize < 0 {
+						return false, errDeserialize("negative script size")
+					}
+					if len(v2Serialized[offset:]) < scriptSize {
+						return false, errDeserialize(fmt.Sprintf("unexpected end of "+
+							"data after script size (got %v, need %v)",
+							len(v2Serialized[offset:]), scriptSize))
+					}
+					compressedScript := make([]byte, scriptSize)
+					copy(compressedScript, v2Serialized[offset:offset+scriptSize])
+					offset += scriptSize
+					stxo.compScript = compressedScript
+
+					// Deserialize the containing transaction if the flags indicate that
+					// the transaction has been fully spent.
+					// The flags format is:
+					//   bit  0   - containing transaction is a coinbase
+					//   bit  1   - containing transaction has an expiry
+					//   bits 2-4 - transaction type
+					//   bit  5   - unused
+					//   bit  6   - is fully spent
+					//   bit  7   - unused
+					fullySpent := flags&(1<<6) != 0
+					if fullySpent {
+						txType := stake.TxType((flags & 0x1c) >> 2)
+						stxo.flags = uint8(flags)
+
+						// Unset the spent flag since it is no longer needed in the new
+						// version.
+						stxo.flags &^= 1 << 6
+
+						// Deserialize the version and ignore it since it is no longer
+						// used in the new format.
+						_, bytesRead := deserializeVLQ(v2Serialized[offset:])
+						if bytesRead == 0 {
+							return false, errDeserialize("unexpected end of " +
+								"data during decoding (tx version)")
+						}
+						offset += bytesRead
+
+						if txType == stake.TxTypeSStx {
+							sz, err := determineMinimalOutputsSizeV1(v2Serialized[offset:])
+							if err != nil {
+								return false, errDeserialize(fmt.Sprintf("unable to decode "+
+									"ticket outputs: %v", err))
+							}
+
+							// Copy the ticket minimal outputs.
+							ticketMinOuts := make([]byte, sz)
+							copy(ticketMinOuts, v2Serialized[offset:offset+sz])
+							stxo.ticketMinOuts = ticketMinOuts
+							offset += sz
+						}
+
+						// Save the fully spent tx info in the temp bucket.  Store the
+						// fields that were conditionally stored in V2, which includes flags
+						// and ticket minimal outputs.
+						//
+						// The serialzied format is:
+						//   flags             VLQ            byte
+						//   ticketMinOuts     []byte         variable
+						//
+						// The flags format is:
+						//   bit  0   - containing transaction is a coinbase
+						//   bit  1   - containing transaction has an expiry
+						//   bits 2-5 - transaction type
+						//   bits 6-7 - unused
+						//
+						// The ticket min outs field is only stored for ticket submission
+						// outputs.
+						size := serializeSizeVLQ(uint64(stxo.flags))
+						if txType == stake.TxTypeSStx && stxo.txOutIndex == 0 {
+							size += len(stxo.ticketMinOuts)
+						}
+						target := make([]byte, size)
+						tmpOffset := putVLQ(target, uint64(stxo.flags))
+						if txType == stake.TxTypeSStx && stxo.txOutIndex == 0 {
+							copy(target[tmpOffset:], stxo.ticketMinOuts)
+						}
+						err = tmpTxInfoBucket.Put(txIn.PreviousOutPoint.Hash[:], target)
+						if err != nil {
+							return false, err
+						}
+
+						// Continue since we have everything we need for stxos that were
+						// marked as fully spent.
+						continue
+					}
+
+					// The stxo was not marked as fully spent (otherwise we already
+					// continued above).  To get the missing tx info (flags and ticket
+					// min outs), first check the tmp bucket, and if not found, then
+					// check the utxo set.
+
+					// First, check the temp bucket for the tx info.
+					tmpSerialized := tmpTxInfoBucket.Get(txIn.PreviousOutPoint.Hash[:])
+					if len(tmpSerialized) != 0 {
+						flags, bytesRead := deserializeVLQ(tmpSerialized)
+						tmpOffset := bytesRead
+						stxo.flags = uint8(flags)
+
+						// Decode the flags.  The format is:
+						//   bit  0   - containing transaction is a coinbase
+						//   bit  1   - containing transaction has an expiry
+						//   bits 2-5 - transaction type
+						//   bits 6-7 - unused
+						txType := stake.TxType((flags & 0x3c) >> 2)
+						if txType == stake.TxTypeSStx {
+							stxo.ticketMinOuts = make([]byte, len(tmpSerialized[tmpOffset:]))
+							copy(stxo.ticketMinOuts, tmpSerialized[tmpOffset:])
+						}
+
+						// Continue to the next stxo since the flags and ticket min outs
+						// have now been set.
+						continue
+					}
+
+					// If the temp bucked didn't have the tx info, check the utxo set for
+					// the tx info.  We don't know what output to look for, so this scans
+					// until it finds the first output for the corresponding transaction
+					// hash.
+					//
+					// Attempt to find an entry by seeking for the hash along with a zero
+					// index and tree.  Due to the fact the keys are serialized as
+					// <hash><index><tree>, where the index and tree use an MSB encoding,
+					// if there are any entries for the hash at all, one will be found.
+					cursor := v3UtxoSetBucket.Cursor()
+					index := uint64(0)
+					tree := uint64(0)
+					utxoKey := make([]byte, chainhash.HashSize+serializeSizeVLQ(index)+
+						serializeSizeVLQ(tree))
+					copy(utxoKey, txIn.PreviousOutPoint.Hash[:])
+					utxoKeyOffset := chainhash.HashSize
+					utxoKeyOffset += putVLQ(utxoKey[utxoKeyOffset:], index)
+					putVLQ(utxoKey[utxoKeyOffset:], tree)
+					ok := cursor.Seek(utxoKey)
+					if !ok {
+						return false, AssertError(fmt.Sprintf("Couldn't find any utxo "+
+							"for non-fully spent tx %v",
+							txIn.PreviousOutPoint.Hash.String()))
+					}
+					cursorKey := cursor.Key()
+					if len(cursorKey) < chainhash.HashSize {
+						return false, AssertError(fmt.Sprintf("Couldn't find any utxo "+
+							"for non-fully spent tx %v",
+							txIn.PreviousOutPoint.Hash.String()))
+					}
+
+					// An entry was found, but it could just be an entry with the next
+					// highest hash after the requested one, so make sure the hashes
+					// actually match.
+					if chainhash.HashSize >= len(cursorKey) {
+						return false, errDeserialize("unexpected length for serialized " +
+							"outpoint key")
+					}
+					var keyHash chainhash.Hash
+					copy(keyHash[:], cursorKey[:chainhash.HashSize])
+					keyOffset := chainhash.HashSize
+					keyIdx, bytesRead := deserializeVLQ(cursorKey[keyOffset:])
+					keyOffset += bytesRead
+					if keyOffset >= len(cursorKey) {
+						return false, errDeserialize("unexpected end of data after index")
+					}
+					keyTree, _ := deserializeVLQ(cursorKey[keyOffset:])
+					outpoint := wire.OutPoint{Hash: keyHash, Index: uint32(keyIdx),
+						Tree: int8(keyTree)}
+					if outpoint.Hash != txIn.PreviousOutPoint.Hash {
+						return false, AssertError(fmt.Sprintf("Couldn't find any utxo "+
+							"for non-fully spent tx %v",
+							txIn.PreviousOutPoint.Hash.String()))
+					}
+
+					// Deserialize the V3 utxo entry.
+					//
+					// The V3 serialized key format is:
+					//
+					//   <hash><output index><tree>
+					//
+					//   Field                Type             Size
+					//   hash                 chainhash.Hash   chainhash.HashSize
+					//   output index         VLQ              variable
+					//   tree                 VLQ              variable
+					//
+					// The V3 serialized value format is:
+					//
+					//   <block height><block index><flags><compressed txout>
+					//   OPTIONAL: [<ticket min outs>]
+					//
+					//   Field                Type     Size
+					//   block height         VLQ      variable
+					//   block index          VLQ      variable
+					//   flags                VLQ      variable
+					//   compressed txout
+					//     compressed amount   VLQ      variable
+					//     compressed version  VLQ      variable
+					//     compressed script   []byte   variable
+					//
+					//   OPTIONAL
+					//     ticketMinOuts      []byte         variable
+					//
+					// The serialized flags format is:
+					//   bit  0     - containing transaction is a coinbase
+					//   bit  1     - containing transaction has an expiry
+					//   bits 2-5   - transaction type
+					//   bits 6-7   - unused
+					//
+					// The ticket min outs field contains minimally encoded outputs for
+					// all outputs of a ticket transaction. It is only encoded for ticket
+					// submission outputs.
+					v3UtxoSerialized := cursor.Value()
+
+					// Deserialize the block height.  Ignore it since we don't need it.
+					_, bytesRead = deserializeVLQ(v3UtxoSerialized)
+					v3UtxoOffset := bytesRead
+					if v3UtxoOffset >= len(v3UtxoSerialized) {
+						return false, errDeserialize("unexpected end of data after height")
+					}
+
+					// Deserialize the block index.  Ignore it since we don't need it.
+					_, bytesRead = deserializeVLQ(v3UtxoSerialized[v3UtxoOffset:])
+					v3UtxoOffset += bytesRead
+					if v3UtxoOffset >= len(v3UtxoSerialized) {
+						return false, errDeserialize("unexpected end of data after index")
+					}
+
+					// Deserialize the flags.
+					v3UtxoFlags, bytesRead := deserializeVLQ(v3UtxoSerialized[v3UtxoOffset:])
+					v3UtxoOffset += bytesRead
+					if v3UtxoOffset >= len(v3UtxoSerialized) {
+						return false, errDeserialize("unexpected end of data after flags")
+					}
+
+					// Set the flags on the stxo.
+					stxo.flags = uint8(v3UtxoFlags)
+
+					// Deserialize the compressed amount and ensure there are bytes
+					// remaining for the compressed script.  Ignore it since we don't need
+					// it.
+					_, bytesRead = deserializeVLQ(v3UtxoSerialized[v3UtxoOffset:])
+					if bytesRead == 0 {
+						return false, errDeserialize("unexpected end of data during decoding " +
+							"(compressed amount)")
+					}
+					v3UtxoOffset += bytesRead
+
+					// Decode the script version.  Ignore it since we don't need it.
+					_, bytesRead = deserializeVLQ(v3UtxoSerialized[v3UtxoOffset:])
+					if bytesRead == 0 {
+						return false, errDeserialize("unexpected end of data during decoding " +
+							"(script version)")
+					}
+					v3UtxoOffset += bytesRead
+
+					// Decode the compressed script size and ensure there are enough bytes
+					// left in the slice for it.
+					scriptSize = decodeCompressedScriptSize(v3UtxoSerialized[v3UtxoOffset:],
+						compressionVersion)
+					// Note: scriptSize == 0 is OK (an empty compressed script is valid)
+					if scriptSize < 0 {
+						return false, errDeserialize("negative script size")
+					}
+					if len(v3UtxoSerialized[v3UtxoOffset:]) < scriptSize {
+						return false, errDeserialize(fmt.Sprintf("unexpected end of "+
+							"data after script size (got %v, need %v)",
+							len(v3UtxoSerialized[v3UtxoOffset:]), scriptSize))
+					}
+					// Ignore the script since we don't need it.
+					v3UtxoOffset += scriptSize
+
+					// Determine the tx type from the flags.  The flags format is:
+					//   bit  0     - containing transaction is a coinbase
+					//   bit  1     - containing transaction has an expiry
+					//   bits 2-5   - transaction type
+					//   bits 6-7   - unused
+					txType := stake.TxType((v3UtxoFlags & 0x3c) >> 2)
+
+					// Copy the minimal outputs if this was a ticket submission output.
+					if txType == stake.TxTypeSStx && outpoint.Index == 0 {
+						stxo.ticketMinOuts = make([]byte, len(v3UtxoSerialized[v3UtxoOffset:]))
+						copy(stxo.ticketMinOuts, v3UtxoSerialized[v3UtxoOffset:])
+					}
+				}
+			}
+
+			// Create a V3 spend journal entry with the details deserialized above.
+			//
+			// The V3 serialized format is:
+			//
+			//   [<flags><script version><compressed pk script>],...
+			//   OPTIONAL: <ticket min outs>
+			//
+			//   Field                Type           Size
+			//   flags                VLQ            byte
+			//   scriptVersion        uint16         2 bytes
+			//   pkScript             VLQ+[]byte     variable
+			//
+			//   OPTIONAL
+			//     ticketMinOuts      []byte         variable
+			//
+			// The serialized flags format is:
+			//   bit  0     - containing transaction is a coinbase
+			//   bit  1     - containing transaction has an expiry
+			//   bits 2-5   - transaction type
+			//   bits 6-7   - unused
+			//
+			// The ticket min outs field contains minimally encoded outputs for all
+			// outputs of a ticket transaction. It is only encoded for ticket
+			// submission outputs.
+
+			// Calculate the size needed to serialize the entire journal entry.
+			var size int
+			sizes := make([]int, 0, len(stxos))
+			for i := range stxos {
+				stxo := &stxos[i]
+				sz := serializeSizeVLQ(uint64(stxo.flags)) +
+					serializeSizeVLQ(uint64(stxo.scriptVersion)) +
+					len(stxo.compScript)
+
+				// Determine the tx type from the flags.  The flags format is:
+				//   bit  0     - containing transaction is a coinbase
+				//   bit  1     - containing transaction has an expiry
+				//   bits 2-5   - transaction type
+				//   bits 6-7   - unused
+				txType := stake.TxType((stxo.flags & 0x3c) >> 2)
+
+				// Only store the minimal outputs if this was a ticket submission
+				// output.
+				if txType == stake.TxTypeSStx && stxo.txOutIndex == 0 {
+					sz += len(stxo.ticketMinOuts)
+				}
+
+				sizes = append(sizes, sz)
+				size += sz
+			}
+			reserialized := make([]byte, size)
+
+			// Serialize each individual stxo directly into the slice in reverse
+			// order one after the other.
+			offset = 0
+			for i := len(stxos) - 1; i > -1; i-- {
+				oldOffset := offset
+				stxo := &stxos[i]
+				offset += putVLQ(reserialized[offset:], uint64(stxo.flags))
+				offset += putVLQ(reserialized[offset:], uint64(stxo.scriptVersion))
+				copy(reserialized[offset:], stxo.compScript)
+				offset += len(stxo.compScript)
+
+				// Determine the tx type from the flags.  The flags format is:
+				//   bit  0     - containing transaction is a coinbase
+				//   bit  1     - containing transaction has an expiry
+				//   bits 2-5   - transaction type
+				//   bits 6-7   - unused
+				txType := stake.TxType((stxo.flags & 0x3c) >> 2)
+
+				// Only store the minimal outputs if this was a ticket submission
+				// output.
+				if txType == stake.TxTypeSStx && stxo.txOutIndex == 0 {
+					copy(reserialized[offset:], stxo.ticketMinOuts)
+					offset += len(stxo.ticketMinOuts)
+				}
+
+				if offset-oldOffset != sizes[i] {
+					return false, AssertError(fmt.Sprintf("bad write; expect sz %v, "+
+						"got sz %v (wrote %x)", sizes[i], offset-oldOffset,
+						reserialized[oldOffset:offset]))
+				}
+			}
+
+			// Create the new entry in the V3 bucket.
+			err = v3SpendJournalBucket.Put(blockHash[:], reserialized)
+			if err != nil {
+				return false, err
+			}
+
+			numMigrated++
+		}
+		isFullyDone := err == nil
+		if (isFullyDone || logProgress) && numMigrated > 0 {
+			totalMigrated += uint64(numMigrated)
+			log.Infof("Migrated %d entries (%d total)", numMigrated,
+				totalMigrated)
+		}
+		return isFullyDone, err
+	}
+
+	// Migrate all entries in batches for the reasons mentioned above.
+	if err := batchedUpdate(ctx, b.db, doBatch); err != nil {
+		return err
+	}
+
+	elapsed := time.Since(start).Round(time.Millisecond)
+	log.Infof("Done migrating spend journal.  Total entries: %d in %v",
+		totalMigrated, elapsed)
+
+	if interruptRequested(ctx) {
+		return errInterruptRequested
+	}
+
+	// Drop temp bucket.
+	log.Info("Removing temp data...")
+	start = time.Now()
+	err = incrementalFlatDrop(ctx, b.db, tmpTxInfoBucketName, "temp data")
+	if err != nil {
+		return err
+	}
+	elapsed = time.Since(start).Round(time.Millisecond)
+	log.Infof("Done removing temp data in %v", elapsed)
+
+	// Drop version 2 spend journal.
+	log.Info("Removing old spend journal...")
+	start = time.Now()
+	err = incrementalFlatDrop(ctx, b.db, v2SpendJournalBucketName, "old journal")
+	if err != nil {
+		return err
+	}
+	elapsed = time.Since(start).Round(time.Millisecond)
+	log.Infof("Done removing old spend journal in %v", elapsed)
+	return nil
+}
+
+// upgradeToVersion9 upgrades a version 8 blockchain database to version 9.
+func upgradeToVersion9(ctx context.Context, b *BlockChain) error {
+	if interruptRequested(ctx) {
+		return errInterruptRequested
+	}
+
+	log.Info("Upgrading database to version 9...")
+	start := time.Now()
+
+	// Migrate the utxoset to version 3.
+	v3DoneKeyName := []byte("utxosetv3done")
+	err := runUpgradeStageOnce(ctx, b.db, v3DoneKeyName, func() error {
+		return migrateUtxoSetVersion2To3(ctx, b.db)
+	})
+	if err != nil {
+		return err
+	}
+
+	if interruptRequested(ctx) {
+		return errInterruptRequested
+	}
+
+	// Migrate the spend journal to version 3.
+	err = migrateSpendJournalVersion2To3(ctx, b)
+	if err != nil {
+		return err
+	}
+
+	// Update and persist the database version  and remove upgrade progress
+	// tracking keys.
+	err = b.db.Update(func(dbTx database.Tx) error {
+		err := dbTx.Metadata().Delete(v3DoneKeyName)
+		if err != nil {
+			return err
+		}
+
+		b.dbInfo.version = 9
+		return dbPutDatabaseInfo(dbTx, b.dbInfo)
+	})
+	if err != nil {
+		return err
+	}
+
+	elapsed := time.Since(start).Round(time.Millisecond)
+	log.Infof("Done upgrading database in %v.", elapsed)
+	return nil
+}
+
 // checkDBTooOldToUpgrade returns an ErrDBTooOldToUpgrade error if the provided
 // database version can no longer be upgraded due to being too old.
 func checkDBTooOldToUpgrade(dbVersion uint32) error {
@@ -1830,7 +2986,9 @@ func CheckDBTooOldToUpgrade(db database.DB) error {
 }
 
 // upgradeDB upgrades old database versions to the newest version by applying
-// all possible upgrades iteratively.
+// all possible upgrades iteratively.  Note that there may also be upgrades
+// that run after the block index has been loaded as part of the
+// upgradeDBPostBlockIndexLoad function.
 //
 // NOTE: The passed database info will be updated with the latest versions.
 func upgradeDB(ctx context.Context, db database.DB, chainParams *chaincfg.Params, dbInfo *databaseInfo) error {
@@ -1888,3 +3046,22 @@ func upgradeDB(ctx context.Context, db database.DB, chainParams *chaincfg.Params
 
 	return nil
 }
+
+// upgradeDBPostBlockIndexLoad upgrades old database versions to the newest
+// version by applying all possible post block index upgrades iteratively.
+// This function should only include upgrades that need to be run after the
+// block index has been loaded.  Upgrades that run prior to the block index
+// being loaded should be included in the upgradeDB function.
+//
+// NOTE: The passed database info will be updated with the latest versions.
+func upgradeDBPostBlockIndexLoad(ctx context.Context, b *BlockChain) error {
+	// Update to a version 9 database if needed.  This entails migrating the
+	// utxoset and spend journal to the v3 format.
+	if b.dbInfo.version == 8 {
+		if err := upgradeToVersion9(ctx, b); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
diff --git a/blockchain/utxoviewpoint.go b/blockchain/utxoviewpoint.go
index 36e0be1a19..43cbfd6818 100644
--- a/blockchain/utxoviewpoint.go
+++ b/blockchain/utxoviewpoint.go
@@ -17,184 +17,177 @@ import (
 	"github.com/decred/dcrd/wire"
 )
 
-// utxoOutput houses details about an individual unspent transaction output such
-// as whether or not it is spent, its public key script, and how much it pays.
-//
-// Standard public key scripts are stored in the database using a compressed
-// format. Since the vast majority of scripts are of the standard form, a fairly
-// significant savings is achieved by discarding the portions of the standard
-// scripts that can be reconstructed.
-//
-// Also, since it is common for only a specific output in a given utxo entry to
-// be referenced from a redeeming transaction, the script and amount for a given
-// output is not uncompressed until the first time it is accessed.  This
-// provides a mechanism to avoid the overhead of needlessly uncompressing all
-// outputs for a given utxo entry at the time of load.
-//
-// The struct is aligned for memory efficiency.
-type utxoOutput struct {
-	pkScript      []byte // The public key script for the output.
-	amount        int64  // The amount of the output.
-	scriptVersion uint16 // The script version
-	compressed    bool   // The public key script is compressed.
-	spent         bool   // Output is spent.
-}
+// utxoFlags defines additional information and state for a transaction output
+// in a utxo view.  The bit representation is:
+//   bit  0    - containing transaction is a coinbase
+//   bit  1    - transaction output has been spent
+//   bit  2    - transaction output has been modified since it was loaded
+//   bit  3    - containing transaction has an expiry
+//   bits 4-7	 - transaction type
+type utxoFlags uint8
+
+const (
+	// utxoFlagCoinBase indicates that a txout was contained in a coinbase tx.
+	utxoFlagCoinBase utxoFlags = 1 << iota
+
+	// utxoFlagSpent indicates that a txout is spent.
+	utxoFlagSpent
+
+	// utxoFlagModified indicates that a txout has been modified since it was
+	// loaded.
+	utxoFlagModified
+
+	// utxoFlagHasExpiry indicates that a txout was contained in a tx that
+	// included an expiry.
+	utxoFlagHasExpiry
+)
 
-// maybeDecompress decompresses the amount and public key script fields of the
-// utxo and marks it decompressed if needed.
-func (o *utxoOutput) maybeDecompress(compressionVersion uint32) {
-	// Nothing to do if it's not compressed.
-	if !o.compressed {
-		return
+const (
+	// utxoFlagTxTypeBitmask describes the bitmask that yields bits 4-7 from
+	// utxoFlags.
+	utxoFlagTxTypeBitmask = 0xf0
+
+	// utxoFlagTxTypeShift is the number of bits to shift utxoFlags to the right
+	// to yield the correct integer value after applying the bitmask with AND.
+	utxoFlagTxTypeShift = 4
+)
+
+// encodeUtxoFlags returns utxoFlags representing the passed parameters.
+func encodeUtxoFlags(coinbase bool, spent bool, modified bool, hasExpiry bool,
+	txType stake.TxType) utxoFlags {
+
+	packedFlags := utxoFlags(txType) << utxoFlagTxTypeShift
+	if coinbase {
+		packedFlags |= utxoFlagCoinBase
+	}
+	if spent {
+		packedFlags |= utxoFlagSpent
+	}
+	if modified {
+		packedFlags |= utxoFlagModified
 	}
+	if hasExpiry {
+		packedFlags |= utxoFlagHasExpiry
+	}
+
+	return packedFlags
+}
 
-	o.pkScript = decompressScript(o.pkScript, compressionVersion)
-	o.compressed = false
+// ticketMinimalOutputs stores the minimal outputs for ticket transactions and
+// is used in ticket submission utxo entries.
+//
+// The minimal outputs for ticket transactions are stored since all outputs of a
+// ticket need to be retrieved when validating vote transaction inputs or
+// revoking a ticket.
+type ticketMinimalOutputs struct {
+	data []byte
 }
 
-// UtxoEntry contains contextual information about an unspent transaction such
-// as whether or not it is a coinbase transaction, which block it was found in,
-// and the spent status of its outputs.
+// UtxoEntry houses details about an individual transaction output in a utxo
+// view such as whether or not it was contained in a coinbase tx, the height of
+// the block that contains the tx, whether or not it is spent, its public key
+// script, and how much it pays.
 //
 // The struct is aligned for memory efficiency.
 type UtxoEntry struct {
-	sparseOutputs map[uint32]*utxoOutput // Sparse map of unspent outputs.
-	stakeExtra    []byte                 // Extra data for the staking system.
-
-	txType    stake.TxType // The stake type of the transaction.
-	height    uint32       // Height of block containing tx.
-	index     uint32       // Index of containing tx in block.
-	txVersion uint16       // The tx version of this tx.
+	amount   int64
+	pkScript []byte
+
+	// ticketMinOuts is the minimal outputs for the ticket transaction that the
+	// output is contained in.  This is only stored in ticket submission outputs
+	// and is nil for all other output types.
+	ticketMinOuts *ticketMinimalOutputs
+
+	blockHeight   uint32
+	blockIndex    uint32
+	scriptVersion uint16
+
+	// packedFlags contains additional info about the output as defined by
+	// utxoFlags.  This approach is used in order to reduce memory usage since
+	// there will be a lot of these in memory.
+	packedFlags utxoFlags
+}
 
-	isCoinBase bool // Whether entry is a coinbase tx.
-	hasExpiry  bool // Whether entry has an expiry.
-	modified   bool // Entry changed since load.
+// isModified returns whether or not the output has been modified since it was
+// loaded.
+func (entry *UtxoEntry) isModified() bool {
+	return entry.packedFlags&utxoFlagModified == utxoFlagModified
 }
 
-// TxVersion returns the version of the transaction the utxo represents.
-func (entry *UtxoEntry) TxVersion() uint16 {
-	return entry.txVersion
+// IsCoinBase returns whether or not the output was contained in a coinbase
+// transaction.
+func (entry *UtxoEntry) IsCoinBase() bool {
+	return entry.packedFlags&utxoFlagCoinBase == utxoFlagCoinBase
 }
 
-// HasExpiry returns the transaction expiry for the transaction that the utxo
-// entry represents.
-func (entry *UtxoEntry) HasExpiry() bool {
-	return entry.hasExpiry
+// IsSpent returns whether or not the output has been spent based upon the
+// current state of the unspent transaction output view it was obtained from.
+func (entry *UtxoEntry) IsSpent() bool {
+	return entry.packedFlags&utxoFlagSpent == utxoFlagSpent
 }
 
-// IsCoinBase returns whether or not the transaction the utxo entry represents
-// is a coinbase.
-func (entry *UtxoEntry) IsCoinBase() bool {
-	return entry.isCoinBase
+// HasExpiry returns whether or not the output was contained in a transaction
+// that included an expiry.
+func (entry *UtxoEntry) HasExpiry() bool {
+	return entry.packedFlags&utxoFlagHasExpiry == utxoFlagHasExpiry
 }
 
-// BlockHeight returns the height of the block containing the transaction the
-// utxo entry represents.
+// BlockHeight returns the height of the block containing the output.
 func (entry *UtxoEntry) BlockHeight() int64 {
-	return int64(entry.height)
+	return int64(entry.blockHeight)
 }
 
-// BlockIndex returns the height of the block containing the transaction the
-// utxo entry represents.
+// BlockIndex returns the index of the transaction that the output is contained
+// in.
 func (entry *UtxoEntry) BlockIndex() uint32 {
-	return entry.index
+	return entry.blockIndex
 }
 
-// TransactionType returns the type of the transaction the utxo entry
-// represents.
+// TransactionType returns the type of the transaction that the output is
+// contained in.
 func (entry *UtxoEntry) TransactionType() stake.TxType {
-	return entry.txType
+	txType := (entry.packedFlags & utxoFlagTxTypeBitmask) >> utxoFlagTxTypeShift
+	return stake.TxType(txType)
 }
 
-// IsOutputSpent returns whether or not the provided output index has been
-// spent based upon the current state of the unspent transaction output view
-// the entry was obtained from.
-//
-// Returns true if the output index references an output that does not exist
-// either due to it being invalid or because the output is not part of the view
-// due to previously being spent/pruned.
-func (entry *UtxoEntry) IsOutputSpent(outputIndex uint32) bool {
-	output, ok := entry.sparseOutputs[outputIndex]
-	if !ok {
-		return true
-	}
-
-	return output.spent
-}
-
-// SpendOutput marks the output at the provided index as spent.  Specifying an
-// output index that does not exist will not have any effect.
-func (entry *UtxoEntry) SpendOutput(outputIndex uint32) {
-	output, ok := entry.sparseOutputs[outputIndex]
-	if !ok {
-		return
-	}
-
+// Spend marks the output as spent.  Spending an output that is already spent
+// has no effect.
+func (entry *UtxoEntry) Spend() {
 	// Nothing to do if the output is already spent.
-	if output.spent {
+	if entry.IsSpent() {
 		return
 	}
 
-	entry.modified = true
-	output.spent = true
+	// Mark the output as spent and modified.
+	entry.packedFlags |= utxoFlagSpent | utxoFlagModified
 }
 
-// IsFullySpent returns whether or not the transaction the utxo entry represents
-// is fully spent.
-func (entry *UtxoEntry) IsFullySpent() bool {
-	// The entry is not fully spent if any of the outputs are unspent.
-	for _, output := range entry.sparseOutputs {
-		if !output.spent {
-			return false
-		}
-	}
-
-	return true
+// Amount returns the amount of the output.
+func (entry *UtxoEntry) Amount() int64 {
+	return entry.amount
 }
 
-// AmountByIndex returns the amount of the provided output index.
-//
-// Returns 0 if the output index references an output that does not exist
-// either due to it being invalid or because the output is not part of the view
-// due to previously being spent/pruned.
-func (entry *UtxoEntry) AmountByIndex(outputIndex uint32) int64 {
-	output, ok := entry.sparseOutputs[outputIndex]
-	if !ok {
-		return 0
-	}
-
-	return output.amount
+// PkScript returns the public key script for the output.
+func (entry *UtxoEntry) PkScript() []byte {
+	return entry.pkScript
 }
 
-// ScriptVersionByIndex returns the public key script for the provided output
-// index.
-//
-// Returns 0 if the output index references an output that does not exist
-// either due to it being invalid or because the output is not part of the view
-// due to previously being spent/pruned.
-func (entry *UtxoEntry) ScriptVersionByIndex(outputIndex uint32) uint16 {
-	output, ok := entry.sparseOutputs[outputIndex]
-	if !ok {
-		return 0
-	}
-
-	return output.scriptVersion
+// ScriptVersion returns the public key script version for the output.
+func (entry *UtxoEntry) ScriptVersion() uint16 {
+	return entry.scriptVersion
 }
 
-// PkScriptByIndex returns the public key script for the provided output index.
-//
-// Returns nil if the output index references an output that does not exist
-// either due to it being invalid or because the output is not part of the view
-// due to previously being spent/pruned.
-func (entry *UtxoEntry) PkScriptByIndex(outputIndex uint32) []byte {
-	output, ok := entry.sparseOutputs[outputIndex]
-	if !ok {
+// TicketMinimalOutputs returns the minimal outputs for the ticket transaction
+// that the output is contained in.  Note that the ticket minimal outputs are
+// only stored in ticket submission outputs and nil will be returned for all
+// other output types.
+func (entry *UtxoEntry) TicketMinimalOutputs() []*stake.MinimalOutput {
+	if entry.ticketMinOuts == nil {
 		return nil
 	}
 
-	// Ensure the output is decompressed before returning the script.
-	output.maybeDecompress(currentCompressionVersion)
-	return output.pkScript
+	minOuts, _ := deserializeToMinimalOutputs(entry.ticketMinOuts.data)
+	return minOuts
 }
 
 // Clone returns a deep copy of the utxo entry.
@@ -204,40 +197,27 @@ func (entry *UtxoEntry) Clone() *UtxoEntry {
 	}
 
 	newEntry := &UtxoEntry{
-		stakeExtra:    make([]byte, len(entry.stakeExtra)),
-		txVersion:     entry.txVersion,
-		height:        entry.height,
-		index:         entry.index,
-		txType:        entry.txType,
-		isCoinBase:    entry.isCoinBase,
-		hasExpiry:     entry.hasExpiry,
-		sparseOutputs: make(map[uint32]*utxoOutput),
+		amount:        entry.amount,
+		pkScript:      entry.pkScript,
+		blockHeight:   entry.blockHeight,
+		blockIndex:    entry.blockIndex,
+		scriptVersion: entry.scriptVersion,
+		packedFlags:   entry.packedFlags,
 	}
-	copy(newEntry.stakeExtra, entry.stakeExtra)
-	for outputIndex, output := range entry.sparseOutputs {
-		newEntry.sparseOutputs[outputIndex] = &utxoOutput{
-			pkScript:      output.pkScript,
-			amount:        output.amount,
-			scriptVersion: output.scriptVersion,
-			compressed:    output.compressed,
-			spent:         output.spent,
+
+	if entry.ticketMinOuts != nil {
+		newEntry.ticketMinOuts = &ticketMinimalOutputs{
+			data: make([]byte, len(entry.ticketMinOuts.data)),
 		}
+		copy(newEntry.ticketMinOuts.data, entry.ticketMinOuts.data)
 	}
+
 	return newEntry
 }
 
-// newUtxoEntry returns a new unspent transaction output entry with the provided
-// coinbase flag and block height ready to have unspent outputs added.
-func newUtxoEntry(txVersion uint16, height uint32, index uint32, isCoinBase bool, hasExpiry bool, txType stake.TxType) *UtxoEntry {
-	return &UtxoEntry{
-		sparseOutputs: make(map[uint32]*utxoOutput),
-		txVersion:     txVersion,
-		height:        height,
-		index:         index,
-		isCoinBase:    isCoinBase,
-		hasExpiry:     hasExpiry,
-		txType:        txType,
-	}
+// isTicketSubmissionOutput returns true if the output is a ticket submission.
+func isTicketSubmissionOutput(txType stake.TxType, txOutIdx uint32) bool {
+	return txType == stake.TxTypeSStx && txOutIdx == 0
 }
 
 // UtxoViewpoint represents a view into the set of unspent transaction outputs
@@ -248,7 +228,7 @@ func newUtxoEntry(txVersion uint16, height uint32, index uint32, isCoinBase bool
 // The unspent outputs are needed by other transactions for things such as
 // script validation and double spend prevention.
 type UtxoViewpoint struct {
-	entries    map[chainhash.Hash]*UtxoEntry
+	entries    map[wire.OutPoint]*UtxoEntry
 	bestHash   chainhash.Hash
 	blockChain *BlockChain
 }
@@ -265,47 +245,85 @@ func (view *UtxoViewpoint) SetBestHash(hash *chainhash.Hash) {
 	view.bestHash = *hash
 }
 
-// LookupEntry returns information about a given transaction according to the
-// current state of the view.  It will return nil if the passed transaction
-// hash does not exist in the view or is otherwise not available such as when
-// it has been disconnected during a reorg.
-func (view *UtxoViewpoint) LookupEntry(txHash *chainhash.Hash) *UtxoEntry {
-	entry, ok := view.entries[*txHash]
-	if !ok {
-		return nil
-	}
-
-	return entry
+// LookupEntry returns information about a given transaction output according to
+// the current state of the view.  It will return nil if the passed output does
+// not exist in the view or is otherwise not available such as when it has been
+// disconnected during a reorg.
+func (view *UtxoViewpoint) LookupEntry(outpoint wire.OutPoint) *UtxoEntry {
+	return view.entries[outpoint]
 }
 
-// PrevScript returns the script and script version associated with the provided
-// previous outpoint along with a bool that indicates whether or not the
-// requested entry exists.  This ensures the caller is able to distinguish
-// between missing entry and empty v0 scripts.
-func (view *UtxoViewpoint) PrevScript(prevOut *wire.OutPoint) (uint16, []byte, bool) {
-	entry := view.LookupEntry(&prevOut.Hash)
+// addTxOut adds the specified output to the view if it is not provably
+// unspendable.  When the view already has an entry for the output, it will be
+// marked unspent.  All fields will be updated for existing entries since it's
+// possible it has changed during a reorg.
+func (view *UtxoViewpoint) addTxOut(outpoint wire.OutPoint, txOut *wire.TxOut,
+	packedFlags utxoFlags, blockHeight int64, blockIndex uint32,
+	ticketMinOuts *ticketMinimalOutputs) {
+
+	// Don't add provably unspendable outputs.
+	if txscript.IsUnspendable(txOut.Value, txOut.PkScript) {
+		return
+	}
+
+	// Update existing entries.  All fields are updated because it's possible
+	// (although extremely unlikely) that the existing entry is being replaced by
+	// a different transaction with the same hash.  This is allowed so long as the
+	// previous transaction is fully spent.
+	entry := view.LookupEntry(outpoint)
 	if entry == nil {
-		return 0, nil, false
+		entry = new(UtxoEntry)
+		view.entries[outpoint] = entry
 	}
 
-	version := entry.ScriptVersionByIndex(prevOut.Index)
-	pkScript := entry.PkScriptByIndex(prevOut.Index)
-	return version, pkScript, true
+	entry.amount = txOut.Value
+	entry.pkScript = txOut.PkScript
+	entry.blockHeight = uint32(blockHeight)
+	entry.blockIndex = blockIndex
+	entry.scriptVersion = txOut.Version
+	entry.packedFlags = packedFlags
+	entry.ticketMinOuts = ticketMinOuts
 }
 
-// PriorityInput returns the block height and amount associated with the
-// provided previous outpoint along with a bool that indicates whether or not
-// the requested entry exists.  This ensures the caller is able to distinguish
-// missing entries from zero values.
-func (view *UtxoViewpoint) PriorityInput(prevOut *wire.OutPoint) (int64, int64, bool) {
-	originHash := &prevOut.Hash
-	originIndex := prevOut.Index
-	txEntry := view.LookupEntry(originHash)
-	if txEntry != nil && !txEntry.IsOutputSpent(originIndex) {
-		return txEntry.BlockHeight(), txEntry.AmountByIndex(originIndex), true
+// AddTxOut adds the specified output of the passed transaction to the view if
+// it exists and is not provably unspendable.  When the view already has an
+// entry for the output, it will be marked unspent.  All fields will be updated
+// for existing entries since it's possible it has changed during a reorg.
+func (view *UtxoViewpoint) AddTxOut(tx *dcrutil.Tx, txOutIdx uint32,
+	blockHeight int64, blockIndex uint32, isTreasuryEnabled bool) {
+
+	// Can't add an output for an out of bounds index.
+	msgTx := tx.MsgTx()
+	if txOutIdx >= uint32(len(msgTx.TxOut)) {
+		return
 	}
 
-	return 0, 0, false
+	// Set encoded flags for the transaction.
+	isCoinBase := standalone.IsCoinBaseTx(msgTx, isTreasuryEnabled)
+	const spent = false
+	hasExpiry := msgTx.Expiry != wire.NoExpiryValue
+	const modified = true
+	txType := stake.DetermineTxType(msgTx, isTreasuryEnabled)
+	tree := wire.TxTreeRegular
+	if txType != stake.TxTypeRegular {
+		tree = wire.TxTreeStake
+	}
+	flags := encodeUtxoFlags(isCoinBase, spent, modified, hasExpiry, txType)
+
+	// Update existing entries.  All fields are updated because it's possible
+	// (although extremely unlikely) that the existing entry is being replaced by
+	// a different transaction with the same hash.  This is allowed so long as the
+	// previous transaction is fully spent.
+	outpoint := wire.OutPoint{Hash: *tx.Hash(), Index: txOutIdx, Tree: tree}
+	txOut := msgTx.TxOut[txOutIdx]
+	var ticketMinOuts *ticketMinimalOutputs
+	if isTicketSubmissionOutput(txType, txOutIdx) {
+		ticketMinOuts = &ticketMinimalOutputs{
+			data: make([]byte, serializeSizeForMinimalOutputs(tx)),
+		}
+		putTxToMinimalOutputs(ticketMinOuts.data, tx)
+	}
+	view.addTxOut(outpoint, txOut, flags, blockHeight, blockIndex, ticketMinOuts)
 }
 
 // AddTxOuts adds all outputs in the passed transaction which are not provably
@@ -313,66 +331,77 @@ func (view *UtxoViewpoint) PriorityInput(prevOut *wire.OutPoint) (int64, int64,
 // outputs, they are simply marked unspent.  All fields will be updated for
 // existing entries since it's possible it has changed during a reorg.
 func (view *UtxoViewpoint) AddTxOuts(tx *dcrutil.Tx, blockHeight int64, blockIndex uint32, isTreasuryEnabled bool) {
-	// When there are not already any utxos associated with the transaction,
-	// add a new entry for it to the view.
-	entry := view.LookupEntry(tx.Hash())
-	if entry == nil {
-		msgTx := tx.MsgTx()
-		txType := stake.DetermineTxType(msgTx, isTreasuryEnabled)
-		entry = newUtxoEntry(msgTx.Version, uint32(blockHeight),
-			blockIndex, standalone.IsCoinBaseTx(msgTx, isTreasuryEnabled),
-			msgTx.Expiry != 0, txType)
-		if txType == stake.TxTypeSStx {
-			stakeExtra := make([]byte, serializeSizeForMinimalOutputs(tx))
-			putTxToMinimalOutputs(stakeExtra, tx)
-			entry.stakeExtra = stakeExtra
-		}
-		view.entries[*tx.Hash()] = entry
-	} else {
-		entry.height = uint32(blockHeight)
-		entry.index = blockIndex
+	msgTx := tx.MsgTx()
+
+	// Set encoded flags for the transaction.
+	isCoinBase := standalone.IsCoinBaseTx(msgTx, isTreasuryEnabled)
+	const spent = false
+	hasExpiry := msgTx.Expiry != wire.NoExpiryValue
+	const modified = true
+	txType := stake.DetermineTxType(msgTx, isTreasuryEnabled)
+	tree := wire.TxTreeRegular
+	if txType != stake.TxTypeRegular {
+		tree = wire.TxTreeStake
 	}
-	entry.modified = true
+	flags := encodeUtxoFlags(isCoinBase, spent, modified, hasExpiry, txType)
 
-	// Loop all of the transaction outputs and add those which are not
+	// Loop through all of the transaction outputs and add those which are not
 	// provably unspendable.
-	for txOutIdx, txOut := range tx.MsgTx().TxOut {
-		// TODO allow pruning of stake utxs after all other outputs are spent
-		if txscript.IsUnspendable(txOut.Value, txOut.PkScript) {
-			continue
+	outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
+	for txOutIdx, txOut := range msgTx.TxOut {
+		// Update existing entries.  All fields are updated because it's possible
+		// (although extremely unlikely) that the existing entry is being replaced
+		// by a different transaction with the same hash.  This is allowed so long
+		// as the previous transaction is fully spent.
+		outpoint.Index = uint32(txOutIdx)
+		var ticketMinOuts *ticketMinimalOutputs
+		if isTicketSubmissionOutput(txType, uint32(txOutIdx)) {
+			ticketMinOuts = &ticketMinimalOutputs{
+				data: make([]byte, serializeSizeForMinimalOutputs(tx)),
+			}
+			putTxToMinimalOutputs(ticketMinOuts.data, tx)
 		}
+		view.addTxOut(outpoint, txOut, flags, blockHeight, blockIndex,
+			ticketMinOuts)
+	}
+}
 
-		// Update existing entries.  All fields are updated because it's
-		// possible (although extremely unlikely) that the existing
-		// entry is being replaced by a different transaction with the
-		// same hash.  This is allowed so long as the previous
-		// transaction is fully spent.
-		if output, ok := entry.sparseOutputs[uint32(txOutIdx)]; ok {
-			output.spent = false
-			output.amount = txOut.Value
-			output.scriptVersion = txOut.Version
-			output.pkScript = txOut.PkScript
-			output.compressed = false
-			continue
-		}
+// PrevScript returns the script and script version associated with the provided
+// previous outpoint along with a bool that indicates whether or not the
+// requested entry exists.  This ensures the caller is able to distinguish
+// between missing entries and empty v0 scripts.
+func (view *UtxoViewpoint) PrevScript(prevOut *wire.OutPoint) (uint16, []byte, bool) {
+	entry := view.LookupEntry(*prevOut)
+	if entry == nil {
+		return 0, nil, false
+	}
 
-		// Add the unspent transaction output.
-		entry.sparseOutputs[uint32(txOutIdx)] = &utxoOutput{
-			spent:         false,
-			amount:        txOut.Value,
-			scriptVersion: txOut.Version,
-			pkScript:      txOut.PkScript,
-			compressed:    false,
-		}
+	version := entry.ScriptVersion()
+	pkScript := entry.PkScript()
+	return version, pkScript, true
+}
+
+// PriorityInput returns the block height and amount associated with the
+// provided previous outpoint along with a bool that indicates whether or not
+// the requested entry exists.  This ensures the caller is able to distinguish
+// missing entries from zero values.
+func (view *UtxoViewpoint) PriorityInput(prevOut *wire.OutPoint) (int64, int64, bool) {
+	entry := view.LookupEntry(*prevOut)
+	if entry != nil && !entry.IsSpent() {
+		return entry.BlockHeight(), entry.Amount(), true
 	}
+
+	return 0, 0, false
 }
 
 // connectTransaction updates the view by adding all new utxos created by the
-// passed transaction and marking all utxos that the transactions spend as
+// passed transaction and marking all utxos that the transaction spends as
 // spent.  In addition, when the 'stxos' argument is not nil, it will be updated
 // to append an entry for each spent txout.  An error will be returned if the
 // view does not contain the required utxos.
-func (view *UtxoViewpoint) connectTransaction(tx *dcrutil.Tx, blockHeight int64, blockIndex uint32, stxos *[]spentTxOut, isTreasuryEnabled bool) error {
+func (view *UtxoViewpoint) connectTransaction(tx *dcrutil.Tx, blockHeight int64,
+	blockIndex uint32, stxos *[]spentTxOut, isTreasuryEnabled bool) error {
+
 	// Coinbase transactions don't have any inputs to spend.
 	msgTx := tx.MsgTx()
 	if standalone.IsCoinBaseTx(msgTx, isTreasuryEnabled) {
@@ -386,9 +415,8 @@ func (view *UtxoViewpoint) connectTransaction(tx *dcrutil.Tx, blockHeight int64,
 		return nil
 	}
 
-	// Spend the referenced utxos by marking them spent in the view and,
-	// if a slice was provided for the spent txout details, append an entry
-	// to it.
+	// Spend the referenced utxos by marking them spent in the view and, if a
+	// slice was provided for the spent txout details, append an entry to it.
 	isVote := stake.IsSSGen(msgTx, isTreasuryEnabled)
 	var isTSpend bool
 	if isTreasuryEnabled {
@@ -405,47 +433,35 @@ func (view *UtxoViewpoint) connectTransaction(tx *dcrutil.Tx, blockHeight int64,
 			continue
 		}
 
-		// Ensure the referenced utxo exists in the view.  This should
-		// never happen unless there is a bug is introduced in the code.
-		originIndex := txIn.PreviousOutPoint.Index
-		entry := view.entries[txIn.PreviousOutPoint.Hash]
+		// Ensure the referenced utxo exists in the view.  This should never happen
+		// unless there is a bug is introduced in the code.
+		entry := view.entries[txIn.PreviousOutPoint]
 		if entry == nil {
 			return AssertError(fmt.Sprintf("view missing input %v",
 				txIn.PreviousOutPoint))
 		}
-		entry.SpendOutput(originIndex)
 
-		// Don't create the stxo details if not requested.
-		if stxos == nil {
-			continue
-		}
-
-		// Populate the stxo details using the utxo entry.  When the
-		// transaction is fully spent, set the additional stxo fields
-		// accordingly since those details will no longer be available
-		// in the utxo set.
-		var stxo = spentTxOut{
-			compressed:    false,
-			amount:        txIn.ValueIn,
-			scriptVersion: entry.ScriptVersionByIndex(originIndex),
-			pkScript:      entry.PkScriptByIndex(originIndex),
-		}
-		if entry.IsFullySpent() {
-			stxo.txVersion = entry.TxVersion()
-			stxo.height = uint32(entry.BlockHeight())
-			stxo.index = entry.BlockIndex()
-			stxo.isCoinBase = entry.IsCoinBase()
-			stxo.hasExpiry = entry.HasExpiry()
-			stxo.txType = entry.TransactionType()
-			stxo.txFullySpent = true
-
-			if entry.txType == stake.TxTypeSStx {
-				stxo.stakeExtra = entry.stakeExtra
+		// Only create the stxo details if requested.
+		if stxos != nil {
+			// Populate the stxo details using the utxo entry.
+			var stxo = spentTxOut{
+				amount:        entry.Amount(),
+				pkScript:      entry.PkScript(),
+				ticketMinOuts: entry.ticketMinOuts,
+				blockHeight:   uint32(entry.BlockHeight()),
+				blockIndex:    entry.BlockIndex(),
+				scriptVersion: entry.ScriptVersion(),
+				packedFlags: encodeFlags(entry.IsCoinBase(), entry.HasExpiry(),
+					entry.TransactionType()),
 			}
+
+			*stxos = append(*stxos, stxo)
 		}
 
-		// Append the entry to the provided spent txouts slice.
-		*stxos = append(*stxos, stxo)
+		// Mark the entry as spent.  This is not done until after the relevant
+		// details have been accessed since spending it might clear the fields from
+		// memory in the future.
+		entry.Spend()
 	}
 
 	// Add the transaction's outputs as available utxos.
@@ -454,15 +470,15 @@ func (view *UtxoViewpoint) connectTransaction(tx *dcrutil.Tx, blockHeight int64,
 	return nil
 }
 
-// disconnectTransactions updates the view by removing all utxos created by
-// the transactions in either the regular or stake tree of the block, depending
-// on the flag, and unspending all of the txos spent by those same transactions
-// by using the provided spent txo information.
-func (view *UtxoViewpoint) disconnectTransactions(block *dcrutil.Block, stxos []spentTxOut, stakeTree bool, isTreasuryEnabled bool) error {
+// disconnectTransactions updates the view by removing all utxos created by the
+// transactions in either the regular or stake tree of the block, depending on
+// the flag, and unspending all of the txos spent by those same transactions by
+// using the provided spent txo information.
+func (view *UtxoViewpoint) disconnectTransactions(db database.DB, block *dcrutil.Block, stxos []spentTxOut, stakeTree bool, isTreasuryEnabled bool) error {
 	// Choose which transaction tree to use and the appropriate offset into the
 	// spent transaction outputs that corresponds to them depending on the flag.
-	// Transactions in the stake tree are spent before transactions in the
-	// regular tree, thus skip all of the outputs spent by the regular tree when
+	// Transactions in the stake tree are spent before transactions in the regular
+	// tree, thus skip all of the outputs spent by the regular tree when
 	// disconnecting stake transactions.
 	stxoIdx := len(stxos) - 1
 	transactions := block.Transactions()
@@ -473,6 +489,7 @@ func (view *UtxoViewpoint) disconnectTransactions(block *dcrutil.Block, stxos []
 
 	for txIdx := len(transactions) - 1; txIdx > -1; txIdx-- {
 		tx := transactions[txIdx]
+		txHash := tx.Hash()
 		msgTx := tx.MsgTx()
 		txType := stake.TxTypeRegular
 		if stakeTree {
@@ -488,25 +505,63 @@ func (view *UtxoViewpoint) disconnectTransactions(block *dcrutil.Block, stxos []
 				stakeTree && txIdx == 0
 		}
 
-		// Clear this transaction from the view if it already exists or create a
-		// new empty entry for when it does not.  This is done because the code
-		// relies on its existence in the view in order to signal modifications
-		// have happened.
-		isCoinbase := !stakeTree && txIdx == 0
-		entry := view.entries[*tx.Hash()]
-		if entry == nil {
-			entry = newUtxoEntry(msgTx.Version, uint32(block.Height()),
-				uint32(txIdx), isCoinbase, msgTx.Expiry != 0, txType)
-			view.entries[*tx.Hash()] = entry
+		tree := wire.TxTreeRegular
+		if txType != stake.TxTypeRegular {
+			tree = wire.TxTreeStake
 		}
-		entry.modified = true
-		entry.sparseOutputs = make(map[uint32]*utxoOutput)
-
-		// Loop backwards through all of the transaction inputs (except
-		// for the coinbase and treasurybase which have no inputs) and
-		// unspend the referenced txos.  This is necessary to match the
-		// order of the spent txout entries.
-		if isCoinbase || isTreasuryBase || isTSpend {
+
+		isCoinBase := !stakeTree && txIdx == 0
+		hasExpiry := msgTx.Expiry != wire.NoExpiryValue
+
+		// Mark all of the spendable outputs originally created by the transaction
+		// as spent.  It is instructive to note that while the outputs aren't
+		// actually being spent here, rather they no longer exist.  Since a pruned
+		// utxo set is used, there is no practical difference between a utxo that
+		// does not exist and one that has been spent.
+		//
+		// When the utxo does not already exist in the view, add an entry for it and
+		// then mark it spent.  This is done because the code relies on its
+		// existence in the view in order to signal modifications have happened.
+		outpoint := wire.OutPoint{Hash: *txHash, Tree: tree}
+		for txOutIdx, txOut := range msgTx.TxOut {
+			// Don't add provably unspendable outputs.
+			if txscript.IsUnspendable(txOut.Value, txOut.PkScript) {
+				continue
+			}
+
+			outpoint.Index = uint32(txOutIdx)
+			entry := view.entries[outpoint]
+			if entry == nil {
+				const spent = false
+				const modified = true
+				entry = &UtxoEntry{
+					amount:        txOut.Value,
+					pkScript:      txOut.PkScript,
+					blockHeight:   uint32(block.Height()),
+					blockIndex:    uint32(txIdx),
+					scriptVersion: txOut.Version,
+					packedFlags: encodeUtxoFlags(isCoinBase, spent, modified, hasExpiry,
+						txType),
+				}
+
+				if isTicketSubmissionOutput(txType, uint32(txOutIdx)) {
+					entry.ticketMinOuts = &ticketMinimalOutputs{
+						data: make([]byte, serializeSizeForMinimalOutputs(tx)),
+					}
+					putTxToMinimalOutputs(entry.ticketMinOuts.data, tx)
+				}
+
+				view.entries[outpoint] = entry
+			}
+
+			entry.Spend()
+		}
+
+		// Loop backwards through all of the transaction inputs (except for the
+		// coinbase and treasurybase which have no inputs) and unspend the
+		// referenced txos.  This is necessary to match the order of the spent txout
+		// entries.
+		if isCoinBase || isTreasuryBase || isTSpend {
 			continue
 		}
 		for txInIdx := len(msgTx.TxIn) - 1; txInIdx > -1; txInIdx-- {
@@ -515,72 +570,64 @@ func (view *UtxoViewpoint) disconnectTransactions(block *dcrutil.Block, stxos []
 				continue
 			}
 
-			// Ensure the spent txout index is decremented to stay in sync with
-			// the transaction input.
+			// Ensure the spent txout index is decremented to stay in sync with the
+			// transaction input.
 			stxo := &stxos[stxoIdx]
 			stxoIdx--
 
-			// When there is not already an entry for the referenced transaction
-			// in the view, it means it was fully spent, so create a new utxo
-			// entry in order to resurrect it.
+			// When there is not already an entry for the referenced output in the
+			// view, it means it was previously spent, so create a new utxo entry in
+			// order to resurrect it.
 			txIn := msgTx.TxIn[txInIdx]
-			originHash := &txIn.PreviousOutPoint.Hash
-			originIndex := txIn.PreviousOutPoint.Index
-			entry := view.entries[*originHash]
+			entry := view.entries[txIn.PreviousOutPoint]
 			if entry == nil {
-				if !stxo.txFullySpent {
-					return AssertError(fmt.Sprintf("tried to revive unspent "+
-						"tx %v from non-fully spent stx entry", originHash))
-				}
-				entry = newUtxoEntry(msgTx.Version, stxo.height, stxo.index,
-					stxo.isCoinBase, stxo.hasExpiry, stxo.txType)
-				if stxo.txType == stake.TxTypeSStx {
-					entry.stakeExtra = stxo.stakeExtra
-				}
-				view.entries[*originHash] = entry
-			}
-
-			// Mark the entry as modified since it is either new or will be
-			// changed below.
-			entry.modified = true
-
-			// Restore the specific utxo using the stxo data from the spend
-			// journal if it doesn't already exist in the view.
-			output, ok := entry.sparseOutputs[originIndex]
-			if !ok {
-				// Add the unspent transaction output.
-				entry.sparseOutputs[originIndex] = &utxoOutput{
-					compressed:    stxo.compressed,
-					spent:         false,
+				const spent = false
+				const modified = true
+				entry = &UtxoEntry{
 					amount:        txIn.ValueIn,
-					scriptVersion: stxo.scriptVersion,
 					pkScript:      stxo.pkScript,
+					ticketMinOuts: stxo.ticketMinOuts,
+					blockHeight:   stxo.blockHeight,
+					blockIndex:    stxo.blockIndex,
+					scriptVersion: stxo.scriptVersion,
+					packedFlags: encodeUtxoFlags(stxo.IsCoinBase(), spent, modified,
+						stxo.HasExpiry(), stxo.TransactionType()),
 				}
-				continue
+
+				view.entries[txIn.PreviousOutPoint] = entry
 			}
 
-			// Mark the existing referenced transaction output as unspent.
-			output.spent = false
+			// Mark the existing referenced transaction output as unspent and
+			// modified.
+			entry.packedFlags &^= utxoFlagSpent
+			entry.packedFlags |= utxoFlagModified
 		}
 	}
 
 	return nil
 }
 
+// RemoveEntry removes the given transaction output from the current state of
+// the view.  It will have no effect if the passed output does not exist in the
+// view.
+func (view *UtxoViewpoint) RemoveEntry(outpoint wire.OutPoint) {
+	delete(view.entries, outpoint)
+}
+
 // disconnectRegularTransactions updates the view by removing all utxos created
 // by the transactions in regular tree of the provided block and unspending all
 // of the txos spent by those same transactions by using the provided spent txo
 // information.
-func (view *UtxoViewpoint) disconnectRegularTransactions(block *dcrutil.Block, stxos []spentTxOut, isTreasuryEnabled bool) error {
-	return view.disconnectTransactions(block, stxos, false, isTreasuryEnabled)
+func (view *UtxoViewpoint) disconnectRegularTransactions(db database.DB, block *dcrutil.Block, stxos []spentTxOut, isTreasuryEnabled bool) error {
+	return view.disconnectTransactions(db, block, stxos, false, isTreasuryEnabled)
 }
 
 // disconnectStakeTransactions updates the view by removing all utxos created
 // by the transactions in stake tree of the provided block and unspending all
 // of the txos spent by those same transactions by using the provided spent txo
 // information.
-func (view *UtxoViewpoint) disconnectStakeTransactions(block *dcrutil.Block, stxos []spentTxOut, isTreasuryEnabled bool) error {
-	return view.disconnectTransactions(block, stxos, true, isTreasuryEnabled)
+func (view *UtxoViewpoint) disconnectStakeTransactions(db database.DB, block *dcrutil.Block, stxos []spentTxOut, isTreasuryEnabled bool) error {
+	return view.disconnectTransactions(db, block, stxos, true, isTreasuryEnabled)
 }
 
 // disconnectDisapprovedBlock updates the view by disconnecting all of the
@@ -589,7 +636,6 @@ func (view *UtxoViewpoint) disconnectStakeTransactions(block *dcrutil.Block, stx
 // Disconnecting a transaction entails removing the utxos created by it and
 // restoring the outputs spent by it with the help of the provided spent txo
 // information.
-//func (view *UtxoViewpoint) disconnectDisapprovedBlock(db database.DB, block *dcrutil.Block, stxos []spentTxOut) error {
 func (view *UtxoViewpoint) disconnectDisapprovedBlock(db database.DB, block *dcrutil.Block, isTreasuryEnabled bool) error {
 	// Load all of the spent txos for the block from the database spend journal.
 	var stxos []spentTxOut
@@ -616,7 +662,7 @@ func (view *UtxoViewpoint) disconnectDisapprovedBlock(db database.DB, block *dcr
 			countSpentOutputs(block, isTreasuryEnabled))
 	}
 
-	return view.disconnectRegularTransactions(block, stxos, isTreasuryEnabled)
+	return view.disconnectRegularTransactions(db, block, stxos, isTreasuryEnabled)
 }
 
 // connectBlock updates the view by potentially disconnecting all of the
@@ -713,11 +759,11 @@ func (view *UtxoViewpoint) disconnectBlock(db database.DB, block, parent *dcruti
 	// Disconnect all of the transactions in both the regular and stake trees of
 	// the block.  Notice that the regular tree is disconnected before the stake
 	// tree since that is the reverse of how they are connected.
-	err = view.disconnectRegularTransactions(block, stxos, isTreasuryEnabled)
+	err = view.disconnectRegularTransactions(db, block, stxos, isTreasuryEnabled)
 	if err != nil {
 		return err
 	}
-	err = view.disconnectStakeTransactions(block, stxos, isTreasuryEnabled)
+	err = view.disconnectStakeTransactions(db, block, stxos, isTreasuryEnabled)
 	if err != nil {
 		return err
 	}
@@ -749,65 +795,63 @@ func (view *UtxoViewpoint) disconnectBlock(db database.DB, block, parent *dcruti
 }
 
 // Entries returns the underlying map that stores of all the utxo entries.
-func (view *UtxoViewpoint) Entries() map[chainhash.Hash]*UtxoEntry {
+func (view *UtxoViewpoint) Entries() map[wire.OutPoint]*UtxoEntry {
 	return view.entries
 }
 
-// commit prunes all entries marked modified that are now fully spent and marks
-// all entries as unmodified.
+// commit prunes all entries marked modified that are now spent and marks all
+// entries as unmodified.
 func (view *UtxoViewpoint) commit() {
-	for txHash, entry := range view.entries {
-		if entry == nil || (entry.modified && entry.IsFullySpent()) {
-			delete(view.entries, txHash)
+	for outpoint, entry := range view.entries {
+		if entry == nil || (entry.isModified() && entry.IsSpent()) {
+			delete(view.entries, outpoint)
 			continue
 		}
 
-		entry.modified = false
+		entry.packedFlags &^= utxoFlagModified
 	}
 }
 
 // viewFilteredSet represents a set of utxos to fetch from the database that are
 // not already in a view.
-type viewFilteredSet map[chainhash.Hash]struct{}
+type viewFilteredSet map[wire.OutPoint]struct{}
 
-// add conditionally adds the provided utxo hash to the set if it does not
+// add conditionally adds the provided outpoint to the set if it does not
 // already exist in the provided view.
-func (set viewFilteredSet) add(view *UtxoViewpoint, hash *chainhash.Hash) {
-	if _, ok := view.entries[*hash]; !ok {
-		set[*hash] = struct{}{}
+func (set viewFilteredSet) add(view *UtxoViewpoint, outpoint *wire.OutPoint) {
+	if _, ok := view.entries[*outpoint]; !ok {
+		set[*outpoint] = struct{}{}
 	}
 }
 
 // fetchUtxosMain fetches unspent transaction output data about the provided
-// set of transactions from the point of view of the end of the main chain at
-// the time of the call.
+// set of outpoints from the point of view of the main chain tip at the time of
+// the call.
 //
 // Upon completion of this function, the view will contain an entry for each
-// requested transaction.  Fully spent transactions, or those which otherwise
-// don't exist, will result in a nil entry in the view.
+// requested outpoint.  Spent outputs, or those which otherwise don't exist,
+// will result in a nil entry in the view.
 func (view *UtxoViewpoint) fetchUtxosMain(db database.DB, filteredSet viewFilteredSet) error {
-	// Nothing to do if there are no requested hashes.
+	// Nothing to do if there are no requested outputs.
 	if len(filteredSet) == 0 {
 		return nil
 	}
 
-	// Load the unspent transaction output information for the requested set
-	// of transactions from the point of view of the end of the main chain.
+	// Load the requested set of unspent transaction outputs from the point
+	// of view of the end of the main chain.
 	//
 	// NOTE: Missing entries are not considered an error here and instead
 	// will result in nil entries in the view.  This is intentionally done
-	// since other code uses the presence of an entry in the store as a way
-	// to optimize spend and unspend updates to apply only to the specific
-	// utxos that the caller needs access to.
+	// so other code can use the presence of an entry in the view as a way
+	// to unnecessarily avoid attempting to reload it from the database.
 	return db.View(func(dbTx database.Tx) error {
-		for hash := range filteredSet {
-			hashCopy := hash
-			entry, err := dbFetchUtxoEntry(dbTx, &hashCopy)
+		for outpoint := range filteredSet {
+			entry, err := dbFetchUtxoEntry(dbTx, outpoint)
 			if err != nil {
 				return err
 			}
 
-			view.entries[hash] = entry
+			view.entries[outpoint] = entry
 		}
 
 		return nil
@@ -857,7 +901,7 @@ func (view *UtxoViewpoint) addRegularInputUtxos(block *dcrutil.Block, isTreasury
 
 			// Only request entries that are not already in the view from the
 			// database.
-			filteredSet.add(view, originHash)
+			filteredSet.add(view, &txIn.PreviousOutPoint)
 		}
 	}
 
@@ -877,12 +921,12 @@ func (view *UtxoViewpoint) fetchRegularInputUtxos(db database.DB, block *dcrutil
 	return view.fetchUtxosMain(db, filteredSet)
 }
 
-// fetchInputUtxos loads utxo details about the input transactions referenced
-// by the transactions in both the regular and stake trees of the given block
-// into the view from the database as needed.  In the case of regular tree,
-// referenced entries that are earlier in the regular tree of the block are
-// added to the view.  In all cases, entries that are already in the view are
-// not modified.
+// fetchInputUtxos loads the unspent transaction outputs for the inputs
+// referenced by the transactions in both the regular and stake trees of the
+// given block into the view from the database as needed.  In the case of the
+// regular tree, referenced entries that are earlier in the regular tree of the
+// block are added to the view.  In all cases, entries that are already in the
+// view are not modified.
 func (view *UtxoViewpoint) fetchInputUtxos(db database.DB, block *dcrutil.Block, isTreasuryEnabled bool) error {
 	// Add any outputs of transactions in the regular tree of the block that are
 	// referenced by inputs of transactions that are located later in the tree
@@ -907,8 +951,7 @@ func (view *UtxoViewpoint) fetchInputUtxos(db database.DB, block *dcrutil.Block,
 
 			// Only request entries that are not already in the view
 			// from the database.
-			originHash := &txIn.PreviousOutPoint.Hash
-			filteredSet.add(view, originHash)
+			filteredSet.add(view, &txIn.PreviousOutPoint)
 		}
 	}
 
@@ -919,13 +962,13 @@ func (view *UtxoViewpoint) fetchInputUtxos(db database.DB, block *dcrutil.Block,
 // clone returns a deep copy of the view.
 func (view *UtxoViewpoint) clone() *UtxoViewpoint {
 	clonedView := &UtxoViewpoint{
-		entries:    make(map[chainhash.Hash]*UtxoEntry),
+		entries:    make(map[wire.OutPoint]*UtxoEntry),
 		bestHash:   view.bestHash,
 		blockChain: view.blockChain,
 	}
 
-	for txHash, entry := range view.entries {
-		clonedView.entries[txHash] = entry.Clone()
+	for outpoint, entry := range view.entries {
+		clonedView.entries[outpoint] = entry.Clone()
 	}
 
 	return clonedView
@@ -934,18 +977,17 @@ func (view *UtxoViewpoint) clone() *UtxoViewpoint {
 // NewUtxoViewpoint returns a new empty unspent transaction output view.
 func NewUtxoViewpoint(blockChain *BlockChain) *UtxoViewpoint {
 	return &UtxoViewpoint{
-		entries:    make(map[chainhash.Hash]*UtxoEntry),
+		entries:    make(map[wire.OutPoint]*UtxoEntry),
 		blockChain: blockChain,
 	}
 }
 
-// FetchUtxoView loads utxo details about the input transactions referenced by
-// the passed transaction from the point of view of the end of the main chain
-// while taking into account whether or not the transactions in the regular tree
-// of the current tip block should be included or not depending on the provided
-// flag.  It also attempts to fetch the utxo details for the transaction itself
-// so the returned view can be examined for duplicate unspent transaction
-// outputs.
+// FetchUtxoView loads unspent transaction outputs for the inputs referenced by
+// the passed transaction from the point of view of the main chain tip while
+// taking into account whether or not the transactions in the regular tree of
+// the current tip block should be included or not depending on the provided
+// flag.  It also attempts to fetch the utxos for the outputs of the transaction
+// itself so the returned view can be examined for duplicate transactions.
 //
 // This function is safe for concurrent access however the returned view is NOT.
 func (b *BlockChain) FetchUtxoView(tx *dcrutil.Tx, includeRegularTxns bool) (*UtxoViewpoint, error) {
@@ -1001,12 +1043,21 @@ func (b *BlockChain) FetchUtxoView(tx *dcrutil.Tx, includeRegularTxns bool) (*Ut
 	}
 
 	// Create a set of needed transactions based on those referenced by the
-	// inputs of the passed transaction.  Also, add the passed transaction
+	// inputs of the passed transaction.  Also, add the outputs of the transaction
 	// itself as a way for the caller to detect duplicates that are not fully
 	// spent.
 	filteredSet := make(viewFilteredSet)
-	filteredSet.add(view, tx.Hash())
 	msgTx := tx.MsgTx()
+	txType := stake.DetermineTxType(msgTx, isTreasuryEnabled)
+	tree := wire.TxTreeRegular
+	if txType != stake.TxTypeRegular {
+		tree = wire.TxTreeStake
+	}
+	outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
+	for txOutIdx := range msgTx.TxOut {
+		outpoint.Index = uint32(txOutIdx)
+		filteredSet.add(view, &outpoint)
+	}
 	if !standalone.IsCoinBaseTx(msgTx, isTreasuryEnabled) {
 		isVote := stake.IsSSGen(msgTx, isTreasuryEnabled)
 		for txInIdx, txIn := range msgTx.TxIn {
@@ -1015,7 +1066,7 @@ func (b *BlockChain) FetchUtxoView(tx *dcrutil.Tx, includeRegularTxns bool) (*Ut
 				continue
 			}
 
-			filteredSet.add(view, &txIn.PreviousOutPoint.Hash)
+			filteredSet.add(view, &txIn.PreviousOutPoint)
 		}
 	}
 
@@ -1023,24 +1074,24 @@ func (b *BlockChain) FetchUtxoView(tx *dcrutil.Tx, includeRegularTxns bool) (*Ut
 	return view, err
 }
 
-// FetchUtxoEntry loads and returns the unspent transaction output entry for the
-// passed hash from the point of view of the end of the main chain.
+// FetchUtxoEntry loads and returns the requested unspent transaction output
+// from the point of view of the the main chain tip.
 //
-// NOTE: Requesting a hash for which there is no data will NOT return an error.
-// Instead both the entry and the error will be nil.  This is done to allow
-// pruning of fully spent transactions.  In practice this means the caller must
-// check if the returned entry is nil before invoking methods on it.
+// NOTE: Requesting an output for which there is no data will NOT return an
+// error.  Instead both the entry and the error will be nil.  This is done to
+// allow pruning of spent transaction outputs.  In practice this means the
+// caller must check if the returned entry is nil before invoking methods on it.
 //
 // This function is safe for concurrent access however the returned entry (if
 // any) is NOT.
-func (b *BlockChain) FetchUtxoEntry(txHash *chainhash.Hash) (*UtxoEntry, error) {
+func (b *BlockChain) FetchUtxoEntry(outpoint wire.OutPoint) (*UtxoEntry, error) {
 	b.chainLock.RLock()
 	defer b.chainLock.RUnlock()
 
 	var entry *UtxoEntry
 	err := b.db.View(func(dbTx database.Tx) error {
 		var err error
-		entry, err = dbFetchUtxoEntry(dbTx, txHash)
+		entry, err = dbFetchUtxoEntry(dbTx, outpoint)
 		return err
 	})
 	if err != nil {
diff --git a/blockchain/utxoviewpoint_test.go b/blockchain/utxoviewpoint_test.go
index 95cda652f7..2d93c67871 100644
--- a/blockchain/utxoviewpoint_test.go
+++ b/blockchain/utxoviewpoint_test.go
@@ -55,8 +55,8 @@ func TestFetchUtxoView(t *testing.T) {
 
 		for txInIdx, txIn := range tx.MsgTx().TxIn {
 			prevOut := &txIn.PreviousOutPoint
-			entry := view.LookupEntry(&prevOut.Hash)
-			gotSpent := entry == nil || entry.IsOutputSpent(prevOut.Index)
+			entry := view.LookupEntry(*prevOut)
+			gotSpent := entry == nil || entry.IsSpent()
 			if gotSpent != spent {
 				t.Fatalf("unexpected spent state for txo %s referenced by "+
 					"input %d -- got %v, want %v", prevOut, txInIdx,
diff --git a/blockchain/validate.go b/blockchain/validate.go
index 47318dc7a2..4a9225bb59 100644
--- a/blockchain/validate.go
+++ b/blockchain/validate.go
@@ -1839,31 +1839,39 @@ func (b *BlockChain) checkBlockContext(block *dcrutil.Block, prevNode *blockNode
 //
 // Decred: Check the stake transactions to make sure they don't have this txid
 // too.
-func (b *BlockChain) checkDupTxs(txSet []*dcrutil.Tx, view *UtxoViewpoint) error {
+func (b *BlockChain) checkDupTxs(txSet []*dcrutil.Tx, view *UtxoViewpoint, tree int8) error {
 	if !checkForDuplicateHashes {
 		return nil
 	}
 
-	// Fetch utxo details for all of the transactions in this block.
-	// Typically, there will not be any utxos for any of the transactions.
+	// Fetch utxos for all of the transaction outputs in this block.
+	// Typically, there will not be any utxos for any of the outputs.
 	filteredSet := make(viewFilteredSet)
 	for _, tx := range txSet {
-		filteredSet.add(view, tx.Hash())
+		outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
+		for txOutIdx := range tx.MsgTx().TxOut {
+			outpoint.Index = uint32(txOutIdx)
+			filteredSet.add(view, &outpoint)
+		}
 	}
 	err := view.fetchUtxosMain(b.db, filteredSet)
 	if err != nil {
 		return err
 	}
 
-	// Duplicate transactions are only allowed if the previous transaction
-	// is fully spent.
+	// Duplicate transaction outputs are only allowed if the previous
+	// transaction output is spent.
 	for _, tx := range txSet {
-		txEntry := view.LookupEntry(tx.Hash())
-		if txEntry != nil && !txEntry.IsFullySpent() {
-			str := fmt.Sprintf("tried to overwrite transaction %v "+
-				"at block height %d that is not fully spent",
-				tx.Hash(), txEntry.BlockHeight())
-			return ruleError(ErrOverwriteTx, str)
+		outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
+		for txOutIdx := range tx.MsgTx().TxOut {
+			outpoint.Index = uint32(txOutIdx)
+			entry := view.LookupEntry(outpoint)
+			if entry != nil && !entry.IsSpent() {
+				str := fmt.Sprintf("tried to overwrite transaction output %v "+
+					"at block height %d that is not spent",
+					outpoint, entry.BlockHeight())
+				return ruleError(ErrOverwriteTx, str)
+			}
 		}
 	}
 
@@ -1960,10 +1968,8 @@ func checkTicketPurchaseInputs(msgTx *wire.MsgTx, view *UtxoViewpoint) error {
 
 	for txInIdx := 0; txInIdx < len(msgTx.TxIn); txInIdx++ {
 		txIn := msgTx.TxIn[txInIdx]
-		originTxHash := &txIn.PreviousOutPoint.Hash
-		originTxIndex := txIn.PreviousOutPoint.Index
-		entry := view.LookupEntry(originTxHash)
-		if entry == nil || entry.IsOutputSpent(originTxIndex) {
+		entry := view.LookupEntry(txIn.PreviousOutPoint)
+		if entry == nil || entry.IsSpent() {
 			str := fmt.Sprintf("output %v referenced from transaction %s:%d "+
 				"either does not exist or has already been spent",
 				txIn.PreviousOutPoint, msgTx.TxHash(), txInIdx)
@@ -1974,14 +1980,14 @@ func checkTicketPurchaseInputs(msgTx *wire.MsgTx, view *UtxoViewpoint) error {
 		// particular, the allowed forms are pay-to-pubkey-hash and
 		// pay-to-script-hash either in the standard form (without a stake
 		// opcode) or their stake-tagged variant (with a stake opcode).
-		pkScriptVer := entry.ScriptVersionByIndex(originTxIndex)
+		pkScriptVer := entry.ScriptVersion()
 		if pkScriptVer != 0 {
 			str := fmt.Sprintf("output %v script version %d referenced by "+
 				"ticket %s:%d is not supported", txIn.PreviousOutPoint,
 				pkScriptVer, msgTx.TxHash(), txInIdx)
 			return ruleError(ErrTicketInputScript, str)
 		}
-		pkScript := entry.PkScriptByIndex(originTxIndex)
+		pkScript := entry.PkScript()
 		if !isAllowedTicketInputScriptForm(pkScript) {
 			str := fmt.Sprintf("output %v referenced from ticket %s:%d "+
 				"is not pay-to-pubkey-hash or pay-to-script-hash (script: %x)",
@@ -1995,7 +2001,7 @@ func checkTicketPurchaseInputs(msgTx *wire.MsgTx, view *UtxoViewpoint) error {
 		commitmentOutIdx := txInIdx*2 + 1
 		commitmentScript := msgTx.TxOut[commitmentOutIdx].PkScript
 		commitmentAmount := extractTicketCommitAmount(commitmentScript)
-		inputAmount := entry.AmountByIndex(originTxIndex)
+		inputAmount := entry.Amount()
 		change := msgTx.TxOut[commitmentOutIdx+1].Value
 		adjustedAmount := commitmentAmount + change
 		if adjustedAmount != inputAmount {
@@ -2104,12 +2110,12 @@ func extractTicketCommitFeeLimits(script []byte) uint16 {
 // Note that the returned error is not a RuleError, so the it is up to the
 // caller convert it accordingly.
 func checkTicketSubmissionInput(ticketUtxo *UtxoEntry) error {
-	submissionScriptVer := ticketUtxo.ScriptVersionByIndex(submissionOutputIdx)
+	submissionScriptVer := ticketUtxo.ScriptVersion()
 	if submissionScriptVer != 0 {
 		return fmt.Errorf("script version %d is not supported",
 			submissionScriptVer)
 	}
-	submissionScript := ticketUtxo.PkScriptByIndex(submissionOutputIdx)
+	submissionScript := ticketUtxo.PkScript()
 	if !isStakeSubmission(submissionScript) {
 		return fmt.Errorf("not a supported stake submission script (script: "+
 			"%x)", submissionScript)
@@ -2338,8 +2344,8 @@ func checkVoteInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.Tx, txHe
 
 	// Ensure the referenced ticket is available.
 	ticketHash := &ticketIn.PreviousOutPoint.Hash
-	ticketUtxo := view.LookupEntry(ticketHash)
-	if ticketUtxo == nil || ticketUtxo.IsFullySpent() {
+	ticketUtxo := view.LookupEntry(ticketIn.PreviousOutPoint)
+	if ticketUtxo == nil || ticketUtxo.IsSpent() {
 		str := fmt.Sprintf("ticket output %v referenced by vote %s:%d either "+
 			"does not exist or has already been spent",
 			ticketIn.PreviousOutPoint, voteHash, ticketInIdx)
@@ -2373,7 +2379,7 @@ func checkVoteInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.Tx, txHe
 		return ruleError(ErrImmatureTicketSpend, str)
 	}
 
-	ticketOuts := ConvertUtxosToMinimalOutputs(ticketUtxo)
+	ticketOuts := ticketUtxo.TicketMinimalOutputs()
 	if len(ticketOuts) == 0 {
 		panicf("missing extra stake data for ticket %v -- probable database "+
 			"corruption", ticketHash)
@@ -2438,8 +2444,8 @@ func checkRevocationInputs(tx *dcrutil.Tx, txHeight int64, view *UtxoViewpoint,
 
 	// Ensure the referenced ticket is available.
 	ticketHash := &ticketIn.PreviousOutPoint.Hash
-	ticketUtxo := view.LookupEntry(ticketHash)
-	if ticketUtxo == nil || ticketUtxo.IsFullySpent() {
+	ticketUtxo := view.LookupEntry(ticketIn.PreviousOutPoint)
+	if ticketUtxo == nil || ticketUtxo.IsSpent() {
 		str := fmt.Sprintf("ticket output %v referenced from revocation %s:%d "+
 			"either does not exist or has already been spent",
 			ticketIn.PreviousOutPoint, revokeHash, ticketInIdx)
@@ -2475,7 +2481,7 @@ func checkRevocationInputs(tx *dcrutil.Tx, txHeight int64, view *UtxoViewpoint,
 		return ruleError(ErrImmatureTicketSpend, str)
 	}
 
-	ticketOuts := ConvertUtxosToMinimalOutputs(ticketUtxo)
+	ticketOuts := ticketUtxo.TicketMinimalOutputs()
 	if len(ticketOuts) == 0 {
 		panicf("missing extra stake data for ticket %v -- probable database "+
 			"corruption", ticketHash)
@@ -2628,13 +2634,14 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 			continue
 		}
 
-		txInHash := &txIn.PreviousOutPoint.Hash
-		originTxIndex := txIn.PreviousOutPoint.Index
-		utxoEntry := view.LookupEntry(txInHash)
-		if utxoEntry == nil || utxoEntry.IsOutputSpent(originTxIndex) {
+		txInOutpoint := txIn.PreviousOutPoint
+		txInHash := &txInOutpoint.Hash
+		originTxIndex := txInOutpoint.Index
+		utxoEntry := view.LookupEntry(txInOutpoint)
+		if utxoEntry == nil || utxoEntry.IsSpent() {
 			str := fmt.Sprintf("output %v referenced from "+
 				"transaction %s:%d either does not exist or "+
-				"has already been spent", txIn.PreviousOutPoint,
+				"has already been spent", txInOutpoint,
 				txHash, idx)
 			return 0, ruleError(ErrMissingTxOut, str)
 		}
@@ -2642,7 +2649,7 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 		// Check fraud proof witness data.
 
 		// Using zero value outputs as inputs is banned.
-		if utxoEntry.AmountByIndex(originTxIndex) == 0 {
+		if utxoEntry.Amount() == 0 {
 			str := fmt.Sprintf("tried to spend zero value output "+
 				"from input %v, idx %v", txInHash,
 				originTxIndex)
@@ -2651,10 +2658,10 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 
 		if checkFraudProof {
 			if txIn.ValueIn !=
-				utxoEntry.AmountByIndex(originTxIndex) {
+				utxoEntry.Amount() {
 				str := fmt.Sprintf("bad fraud check value in "+
 					"(expected %v, given %v) for txIn %v",
-					utxoEntry.AmountByIndex(originTxIndex),
+					utxoEntry.Amount(),
 					txIn.ValueIn, idx)
 				return 0, ruleError(ErrFraudAmountIn, str)
 			}
@@ -2710,29 +2717,11 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 			}
 		}
 
-		// Ensure that the outpoint's tx tree makes sense.
-		originTxOPTree := txIn.PreviousOutPoint.Tree
-		originTxType := utxoEntry.TransactionType()
-		indicatedTree := wire.TxTreeRegular
-		if originTxType != stake.TxTypeRegular {
-			indicatedTree = wire.TxTreeStake
-		}
-		if indicatedTree != originTxOPTree {
-			errStr := fmt.Sprintf("tx %v attempted to spend from "+
-				"a %v tx tree (hash %v), yet the outpoint "+
-				"specified a %v tx tree instead", txHash,
-				indicatedTree, txIn.PreviousOutPoint.Hash,
-				originTxOPTree)
-			return 0, ruleError(ErrDiscordantTxTree, errStr)
-		}
-
 		// OP_TADD and OP_TGEN tagged outputs can only be spent after
 		// CoinbaseMaturity blocks.
 		if isTreasuryEnabled {
-			scriptClass := txscript.GetScriptClass(
-				utxoEntry.ScriptVersionByIndex(originTxIndex),
-				utxoEntry.PkScriptByIndex(originTxIndex),
-				isTreasuryEnabled)
+			scriptClass := txscript.GetScriptClass(utxoEntry.ScriptVersion(),
+				utxoEntry.PkScript(), isTreasuryEnabled)
 			if scriptClass == txscript.TreasuryAddTy ||
 				scriptClass == txscript.TreasuryGenTy {
 				originHeight := utxoEntry.BlockHeight()
@@ -2756,9 +2745,8 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 		// from non votes and revocations and make sure that they spend no
 		// OP_SSTX tagged outputs.
 		if !(isVote || isRevocation) {
-			if stake.IsTicketPurchaseScript(
-				utxoEntry.ScriptVersionByIndex(originTxIndex),
-				utxoEntry.PkScriptByIndex(originTxIndex)) {
+			if stake.IsTicketPurchaseScript(utxoEntry.ScriptVersion(),
+				utxoEntry.PkScript()) {
 				errSSGen := stake.CheckSSGen(msgTx,
 					isTreasuryEnabled)
 				errSSRtx := stake.CheckSSRtx(msgTx)
@@ -2774,12 +2762,10 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 
 		// OP_SSGEN and OP_SSRTX tagged outputs can only be spent after
 		// coinbase maturity many blocks.
-		if stake.IsRevocationScript(
-			utxoEntry.ScriptVersionByIndex(originTxIndex),
-			utxoEntry.PkScriptByIndex(originTxIndex)) ||
-			stake.IsVoteScript(
-				utxoEntry.ScriptVersionByIndex(originTxIndex),
-				utxoEntry.PkScriptByIndex(originTxIndex)) {
+		if stake.IsRevocationScript(utxoEntry.ScriptVersion(),
+			utxoEntry.PkScript()) ||
+			stake.IsVoteScript(utxoEntry.ScriptVersion(),
+				utxoEntry.PkScript()) {
 			originHeight := utxoEntry.BlockHeight()
 			blocksSincePrev := txHeight - originHeight
 			if blocksSincePrev < reqStakeOutMaturity {
@@ -2795,9 +2781,8 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 
 		// Ticket change outputs may only be spent after ticket change
 		// maturity many blocks.
-		if stake.IsStakeChangeScript(
-			utxoEntry.ScriptVersionByIndex(originTxIndex),
-			utxoEntry.PkScriptByIndex(originTxIndex)) {
+		if stake.IsStakeChangeScript(utxoEntry.ScriptVersion(),
+			utxoEntry.PkScript()) {
 			originHeight := utxoEntry.BlockHeight()
 			blocksSincePrev := txHeight - originHeight
 			if blocksSincePrev <
@@ -2817,7 +2802,7 @@ func CheckTransactionInputs(subsidyCache *standalone.SubsidyCache, tx *dcrutil.T
 		// in a transaction are in a unit value known as an atom.  One
 		// Decred is a quantity of atoms as defined by the AtomPerCoin
 		// constant.
-		originTxAtom := utxoEntry.AmountByIndex(originTxIndex)
+		originTxAtom := utxoEntry.Amount()
 		if originTxAtom < 0 {
 			str := fmt.Sprintf("transaction output has negative "+
 				"value of %v", originTxAtom)
@@ -2935,20 +2920,19 @@ func CountP2SHSigOps(tx *dcrutil.Tx, isCoinBaseTx bool, isStakeBaseTx bool, view
 	totalSigOps := 0
 	for txInIndex, txIn := range msgTx.TxIn {
 		// Ensure the referenced input transaction is available.
-		originTxHash := &txIn.PreviousOutPoint.Hash
-		originTxIndex := txIn.PreviousOutPoint.Index
-		utxoEntry := view.LookupEntry(originTxHash)
-		if utxoEntry == nil || utxoEntry.IsOutputSpent(originTxIndex) {
+		txInOutpoint := txIn.PreviousOutPoint
+		utxoEntry := view.LookupEntry(txInOutpoint)
+		if utxoEntry == nil || utxoEntry.IsSpent() {
 			str := fmt.Sprintf("output %v referenced from "+
 				"transaction %s:%d either does not exist or "+
-				"has already been spent", txIn.PreviousOutPoint,
+				"has already been spent", txInOutpoint,
 				tx.Hash(), txInIndex)
 			return 0, ruleError(ErrMissingTxOut, str)
 		}
 
 		// We're only interested in pay-to-script-hash types, so skip
 		// this input if it's not one.
-		pkScript := utxoEntry.PkScriptByIndex(originTxIndex)
+		pkScript := utxoEntry.PkScript()
 		if !txscript.IsPayToScriptHash(pkScript) {
 			continue
 		}
@@ -2966,7 +2950,7 @@ func CountP2SHSigOps(tx *dcrutil.Tx, isCoinBaseTx bool, isStakeBaseTx bool, view
 		if totalSigOps < lastSigOps {
 			str := fmt.Sprintf("the public key script from output "+
 				"%v contains too many signature operations - "+
-				"overflow", txIn.PreviousOutPoint)
+				"overflow", txInOutpoint)
 			return 0, ruleError(ErrTooManySigOps, str)
 		}
 	}
@@ -3021,16 +3005,16 @@ func checkStakeBaseAmounts(subsidyCache *standalone.SubsidyCache, height int64,
 		msgTx := tx.MsgTx()
 		if stake.IsSSGen(msgTx, isTreasuryEnabled) {
 			// Ensure the input is available.
-			txInHash := &msgTx.TxIn[1].PreviousOutPoint.Hash
-			utxoEntry, exists := view.entries[*txInHash]
+			txInOutpoint := msgTx.TxIn[1].PreviousOutPoint
+			txInHash := &txInOutpoint.Hash
+			utxoEntry, exists := view.entries[txInOutpoint]
 			if !exists || utxoEntry == nil {
 				str := fmt.Sprintf("couldn't find input tx %v "+
 					"for stakebase amounts check", txInHash)
 				return ruleError(ErrTicketUnavailable, str)
 			}
 
-			originTxIndex := msgTx.TxIn[1].PreviousOutPoint.Index
-			originTxAtom := utxoEntry.AmountByIndex(originTxIndex)
+			originTxAtom := utxoEntry.Amount()
 
 			totalOutputs := int64(0)
 			// Sum up the outputs.
@@ -3066,16 +3050,16 @@ func getStakeBaseAmounts(txs []*dcrutil.Tx, view *UtxoViewpoint, isTreasuryEnabl
 		msgTx := tx.MsgTx()
 		if stake.IsSSGen(msgTx, isTreasuryEnabled) {
 			// Ensure the input is available.
-			txInHash := &msgTx.TxIn[1].PreviousOutPoint.Hash
-			utxoEntry, exists := view.entries[*txInHash]
+			txInOutpoint := msgTx.TxIn[1].PreviousOutPoint
+			txInHash := &txInOutpoint.Hash
+			utxoEntry, exists := view.entries[txInOutpoint]
 			if !exists || utxoEntry == nil {
 				str := fmt.Sprintf("couldn't find input tx %v "+
 					"for stakebase amounts get", txInHash)
 				return 0, ruleError(ErrTicketUnavailable, str)
 			}
 
-			originTxIndex := msgTx.TxIn[1].PreviousOutPoint.Index
-			originTxAtom := utxoEntry.AmountByIndex(originTxIndex)
+			originTxAtom := utxoEntry.Amount()
 
 			totalInputs += originTxAtom
 
@@ -3119,8 +3103,9 @@ func getStakeTreeFees(subsidyCache *standalone.SubsidyCache, height int64, txs [
 				continue
 			}
 
-			txInHash := &in.PreviousOutPoint.Hash
-			utxoEntry, exists := view.entries[*txInHash]
+			txInOutpoint := in.PreviousOutPoint
+			txInHash := &txInOutpoint.Hash
+			utxoEntry, exists := view.entries[txInOutpoint]
 			if !exists || utxoEntry == nil {
 				str := fmt.Sprintf("couldn't find input tx "+
 					"%v for stake tree fee calculation",
@@ -3128,8 +3113,7 @@ func getStakeTreeFees(subsidyCache *standalone.SubsidyCache, height int64, txs [
 				return 0, ruleError(ErrTicketUnavailable, str)
 			}
 
-			originTxIndex := in.PreviousOutPoint.Index
-			originTxAtom := utxoEntry.AmountByIndex(originTxIndex)
+			originTxAtom := utxoEntry.Amount()
 
 			totalInputs += originTxAtom
 		}
@@ -3562,7 +3546,7 @@ func (b *BlockChain) checkConnectBlock(node *blockNode, block, parent *dcrutil.B
 
 	// Ensure the stake transaction tree does not contain any transactions
 	// that 'overwrite' older transactions which are not fully spent.
-	err = b.checkDupTxs(block.STransactions(), view)
+	err = b.checkDupTxs(block.STransactions(), view, wire.TxTreeStake)
 	if err != nil {
 		log.Tracef("checkDupTxs failed for cur TxTreeStake: %v", err)
 		return err
@@ -3635,7 +3619,7 @@ func (b *BlockChain) checkConnectBlock(node *blockNode, block, parent *dcrutil.B
 
 	// Ensure the regular transaction tree does not contain any transactions
 	// that 'overwrite' older transactions which are not fully spent.
-	err = b.checkDupTxs(block.Transactions(), view)
+	err = b.checkDupTxs(block.Transactions(), view, wire.TxTreeRegular)
 	if err != nil {
 		log.Tracef("checkDupTxs failed for cur TxTreeRegular: %v", err)
 		return err
diff --git a/gcs/blockcf2/blockcf.go b/gcs/blockcf2/blockcf.go
index 2ac6150599..ac194fcea5 100644
--- a/gcs/blockcf2/blockcf.go
+++ b/gcs/blockcf2/blockcf.go
@@ -376,8 +376,8 @@ func Regular(block *wire.MsgBlock, prevScripts PrevScripter) (*gcs.FilterV2, err
 
 				// Commit to the change outputs with the exception of those that
 				// are provably unspendable.
-				isChangeOuput := txOutIdx%2 == 0
-				if isChangeOuput {
+				isChangeOutput := txOutIdx%2 == 0
+				if isChangeOutput {
 					if txOut.Value == 0 {
 						continue
 					}
diff --git a/internal/mempool/mempool.go b/internal/mempool/mempool.go
index 90a8a85a25..c5473b20bb 100644
--- a/internal/mempool/mempool.go
+++ b/internal/mempool/mempool.go
@@ -425,10 +425,10 @@ func (mp *TxPool) removeOrphan(tx *dcrutil.Tx, removeRedeemers bool, isTreasuryE
 			tree = wire.TxTreeStake
 		}
 
-		prevOut := wire.OutPoint{Hash: *txHash, Tree: tree}
+		outpoint := wire.OutPoint{Hash: *txHash, Tree: tree}
 		for txOutIdx := range tx.MsgTx().TxOut {
-			prevOut.Index = uint32(txOutIdx)
-			for _, orphan := range mp.orphansByPrev[prevOut] {
+			outpoint.Index = uint32(txOutIdx)
+			for _, orphan := range mp.orphansByPrev[outpoint] {
 				mp.removeOrphan(orphan, true, isTreasuryEnabled)
 			}
 		}
@@ -698,10 +698,10 @@ func (mp *TxPool) fetchRedeemers(outpoints map[wire.OutPoint]*dcrutil.Tx, tx *dc
 	tree := wire.TxTreeRegular
 	seen := map[chainhash.Hash]struct{}{}
 	redeemers := make([]*dcrutil.Tx, 0)
-	prevOut := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
+	outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
 	for i := uint32(0); i < uint32(len(tx.MsgTx().TxOut)); i++ {
-		prevOut.Index = i
-		txRedeemer, exists := outpoints[prevOut]
+		outpoint.Index = i
+		txRedeemer, exists := outpoints[outpoint]
 		if !exists {
 			continue
 		}
@@ -838,16 +838,16 @@ func (mp *TxPool) removeTransaction(tx *dcrutil.Tx, removeRedeemers bool, isTrea
 			tree = wire.TxTreeStake
 		}
 
-		prevOut := wire.OutPoint{Hash: *txHash, Tree: tree}
+		outpoint := wire.OutPoint{Hash: *txHash, Tree: tree}
 		for i := uint32(0); i < uint32(len(tx.MsgTx().TxOut)); i++ {
-			prevOut.Index = i
-			if txRedeemer, exists := mp.outpoints[prevOut]; exists {
+			outpoint.Index = i
+			if txRedeemer, exists := mp.outpoints[outpoint]; exists {
 				mp.removeTransaction(txRedeemer, true,
 					isTreasuryEnabled)
 				continue
 			}
-			if txRedeemer, exists := mp.stagedOutpoints[prevOut]; exists {
-				log.Tracef("Removing staged transaction %v", prevOut.Hash)
+			if txRedeemer, exists := mp.stagedOutpoints[outpoint]; exists {
+				log.Tracef("Removing staged transaction %v", outpoint.Hash)
 				mp.removeStagedTransaction(txRedeemer)
 			}
 		}
@@ -1116,18 +1116,24 @@ func (mp *TxPool) fetchInputUtxos(tx *dcrutil.Tx, isTreasuryEnabled bool) (*bloc
 	}
 
 	// Attempt to populate any missing inputs from the transaction pool.
-	for originHash, entry := range utxoView.Entries() {
-		if entry != nil && !entry.IsFullySpent() {
+	for _, txIn := range tx.MsgTx().TxIn {
+		prevOut := &txIn.PreviousOutPoint
+		entry := utxoView.LookupEntry(*prevOut)
+		if entry != nil && !entry.IsSpent() {
 			continue
 		}
 
-		if poolTxDesc, exists := mp.pool[originHash]; exists {
-			utxoView.AddTxOuts(poolTxDesc.Tx, mining.UnminedHeight,
+		if poolTxDesc, exists := mp.pool[prevOut.Hash]; exists {
+			// AddTxOut ignores out of range index values, so it is safe to call without
+			// bounds checking here.
+			utxoView.AddTxOut(poolTxDesc.Tx, prevOut.Index, mining.UnminedHeight,
 				wire.NullBlockIndex, isTreasuryEnabled)
 		}
 
-		if stagedTx, exists := mp.staged[originHash]; exists {
-			utxoView.AddTxOuts(stagedTx, mining.UnminedHeight,
+		if stagedTx, exists := mp.staged[prevOut.Hash]; exists {
+			// AddTxOut ignores out of range index values, so it is safe to call without
+			// bounds checking here.
+			utxoView.AddTxOut(stagedTx, prevOut.Index, mining.UnminedHeight,
 				wire.NullBlockIndex, isTreasuryEnabled)
 		}
 	}
@@ -1225,11 +1231,11 @@ func (mp *TxPool) maybeAcceptTransaction(tx *dcrutil.Tx, isNew, rateLimit, allow
 	// Then, be sure to set the tx tree correctly as it's possible a user submitted
 	// it to the network with TxTreeUnknown.
 	txType := stake.DetermineTxType(msgTx, isTreasuryEnabled)
-	if txType == stake.TxTypeRegular {
-		tx.SetTree(wire.TxTreeRegular)
-	} else {
-		tx.SetTree(wire.TxTreeStake)
+	tree := wire.TxTreeRegular
+	if txType != stake.TxTypeRegular {
+		tree = wire.TxTreeStake
 	}
+	tx.SetTree(tree)
 	isVote := txType == stake.TxTypeSSGen
 
 	var isTreasuryBase, isTSpend bool
@@ -1377,21 +1383,26 @@ func (mp *TxPool) maybeAcceptTransaction(tx *dcrutil.Tx, isNew, rateLimit, allow
 
 	// Don't allow the transaction if it exists in the main chain and is not
 	// already fully spent.
-	txEntry := utxoView.LookupEntry(txHash)
-	if txEntry != nil && !txEntry.IsFullySpent() {
-		return nil, txRuleError(ErrAlreadyExists, "transaction already exists")
+	outpoint := wire.OutPoint{Hash: *txHash, Tree: tree}
+	for txOutIdx := range msgTx.TxOut {
+		outpoint.Index = uint32(txOutIdx)
+		entry := utxoView.LookupEntry(outpoint)
+		if entry != nil && !entry.IsSpent() {
+			return nil, txRuleError(ErrAlreadyExists, "transaction already exists")
+		}
+		utxoView.RemoveEntry(outpoint)
 	}
-	delete(utxoView.Entries(), *txHash)
 
-	// Transaction is an orphan if any of the inputs don't exist.
+	// Transaction is an orphan if any of the referenced transaction outputs don't
+	// exist or are already spent.
 	var missingParents []*chainhash.Hash
 	for i, txIn := range msgTx.TxIn {
 		if (i == 0 && (isVote || isTreasuryBase)) || isTSpend {
 			continue
 		}
 
-		entry := utxoView.LookupEntry(&txIn.PreviousOutPoint.Hash)
-		if entry == nil || entry.IsFullySpent() {
+		entry := utxoView.LookupEntry(txIn.PreviousOutPoint)
+		if entry == nil || entry.IsSpent() {
 			// Must make a copy of the hash here since the iterator
 			// is replaced and taking its address directly would
 			// result in all of the entries pointing to the same
@@ -1407,10 +1418,9 @@ func (mp *TxPool) maybeAcceptTransaction(tx *dcrutil.Tx, isNew, rateLimit, allow
 					txIn.PreviousOutPoint.Hash)
 				continue
 			}
-			if entry.IsFullySpent() {
-				log.Tracef("Transaction %v uses full spent input %v "+
-					"and will be considered an orphan", txHash,
-					txIn.PreviousOutPoint.Hash)
+			if entry.IsSpent() {
+				log.Tracef("Transaction %v uses spent input %v and will be considered "+
+					"an orphan", txHash, txIn.PreviousOutPoint.Hash)
 			}
 		}
 	}
@@ -1784,7 +1794,7 @@ func (mp *TxPool) processOrphans(acceptedTx *dcrutil.Tx, isTreasuryEnabled bool)
 			tree = wire.TxTreeStake
 		}
 
-		prevOut := wire.OutPoint{Hash: *processItem.Hash(), Tree: tree}
+		outpoint := wire.OutPoint{Hash: *processItem.Hash(), Tree: tree}
 		for txOutIdx := range processItem.MsgTx().TxOut {
 			// Look up all orphans that redeem the output that is
 			// now available.  This will typically only be one, but
@@ -1797,8 +1807,8 @@ func (mp *TxPool) processOrphans(acceptedTx *dcrutil.Tx, isTreasuryEnabled bool)
 			// would otherwise make outputs unspendable.
 			//
 			// Skip to the next available output if there are none.
-			prevOut.Index = uint32(txOutIdx)
-			orphans, exists := mp.orphansByPrev[prevOut]
+			outpoint.Index = uint32(txOutIdx)
+			orphans, exists := mp.orphansByPrev[outpoint]
 			if !exists {
 				continue
 			}
@@ -2181,11 +2191,11 @@ func New(cfg *Config) *TxPool {
 	// for a given transaction, scan the mempool to find which transactions
 	// spend it.
 	forEachRedeemer := func(tx *dcrutil.Tx, f func(redeemerTx *mining.TxDesc)) {
-		prevOut := wire.OutPoint{Hash: *tx.Hash(), Tree: tx.Tree()}
+		outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tx.Tree()}
 		txOutLen := uint32(len(tx.MsgTx().TxOut))
 		for i := uint32(0); i < txOutLen; i++ {
-			prevOut.Index = i
-			if txRedeemer, exists := mp.outpoints[prevOut]; exists {
+			outpoint.Index = i
+			if txRedeemer, exists := mp.outpoints[outpoint]; exists {
 				f(&mp.pool[txRedeemer.MsgTx().TxHash()].TxDesc)
 			}
 		}
diff --git a/internal/mempool/mempool_test.go b/internal/mempool/mempool_test.go
index 65ea82f9d6..3fa4346400 100644
--- a/internal/mempool/mempool_test.go
+++ b/internal/mempool/mempool_test.go
@@ -83,16 +83,20 @@ func (s *fakeChain) FetchUtxoView(tx *dcrutil.Tx, treeValid bool) (*blockchain.U
 	// All entries are cloned to ensure modifications to the returned view
 	// do not affect the fake chain's view.
 
-	// Add an entry for the tx itself to the new view.
+	// Add entries for the outputs of the tx itself to the new view.
+	msgTx := tx.MsgTx()
 	viewpoint := blockchain.NewUtxoViewpoint(nil)
-	entry := s.utxos.LookupEntry(tx.Hash())
-	viewpoint.Entries()[*tx.Hash()] = entry.Clone()
+	outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tx.Tree()}
+	for txOutIdx := range msgTx.TxOut {
+		outpoint.Index = uint32(txOutIdx)
+		entry := s.utxos.LookupEntry(outpoint)
+		viewpoint.Entries()[outpoint] = entry.Clone()
+	}
 
 	// Add entries for all of the inputs to the tx to the new view.
-	for _, txIn := range tx.MsgTx().TxIn {
-		originHash := &txIn.PreviousOutPoint.Hash
-		entry := s.utxos.LookupEntry(originHash)
-		viewpoint.Entries()[*originHash] = entry.Clone()
+	for _, txIn := range msgTx.TxIn {
+		entry := s.utxos.LookupEntry(txIn.PreviousOutPoint)
+		viewpoint.Entries()[txIn.PreviousOutPoint] = entry.Clone()
 	}
 
 	return viewpoint, nil
@@ -194,7 +198,7 @@ func (s *fakeChain) CalcSequenceLock(tx *dcrutil.Tx, view *blockchain.UtxoViewpo
 			continue
 		}
 
-		utxo := view.LookupEntry(&txIn.PreviousOutPoint.Hash)
+		utxo := view.LookupEntry(txIn.PreviousOutPoint)
 		if utxo == nil {
 			str := fmt.Sprintf("output %v referenced from transaction %s:%d "+
 				"either does not exist or has already been spent",
@@ -1002,7 +1006,8 @@ func TestTicketPurchaseOrphan(t *testing.T) {
 	// Add the transaction back to the mempool to ensure it
 	// kicks the ticket out to the stage pool.
 	harness.AddFakeUTXO(tx, int64(mining.UnminedHeight))
-	harness.chain.utxos.LookupEntry(tx.Hash()).SpendOutput(0)
+	outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: wire.TxTreeRegular, Index: 0}
+	harness.chain.utxos.LookupEntry(outpoint).Spend()
 	_, err = harness.txPool.MaybeAcceptTransaction(tx, false, false)
 	if err != nil {
 		t.Fatalf("ProcessTransaction: failed to accept valid transaction %v",
diff --git a/internal/mempool/policy.go b/internal/mempool/policy.go
index c3a29ff084..3d5879f7ed 100644
--- a/internal/mempool/policy.go
+++ b/internal/mempool/policy.go
@@ -124,10 +124,9 @@ func checkInputsStandard(tx *dcrutil.Tx, txType stake.TxType, utxoView *blockcha
 		// It is safe to elide existence and index checks here since
 		// they have already been checked prior to calling this
 		// function.
-		prevOut := txIn.PreviousOutPoint
-		entry := utxoView.LookupEntry(&prevOut.Hash)
-		originPkScriptVer := entry.ScriptVersionByIndex(prevOut.Index)
-		originPkScript := entry.PkScriptByIndex(prevOut.Index)
+		entry := utxoView.LookupEntry(txIn.PreviousOutPoint)
+		originPkScriptVer := entry.ScriptVersion()
+		originPkScript := entry.PkScript()
 		switch txscript.GetScriptClass(originPkScriptVer,
 			originPkScript, isTreasuryEnabled) {
 		case txscript.ScriptHashTy:
diff --git a/internal/mining/mining.go b/internal/mining/mining.go
index 7d2c5e5843..f9fb981db9 100644
--- a/internal/mining/mining.go
+++ b/internal/mining/mining.go
@@ -398,13 +398,13 @@ type BlockTemplate struct {
 // mergeUtxoView adds all of the entries in viewB to viewA.  The result is that
 // viewA will contain all of its original entries plus all of the entries
 // in viewB.  It will replace any entries in viewB which also exist in viewA
-// if the entry in viewA is fully spent.
+// if the entry in viewA is spent.
 func mergeUtxoView(viewA *blockchain.UtxoViewpoint, viewB *blockchain.UtxoViewpoint) {
 	viewAEntries := viewA.Entries()
-	for hash, entryB := range viewB.Entries() {
-		if entryA, exists := viewAEntries[hash]; !exists ||
-			entryA == nil || entryA.IsFullySpent() {
-			viewAEntries[hash] = entryB
+	for outpoint, entryB := range viewB.Entries() {
+		if entryA, exists := viewAEntries[outpoint]; !exists ||
+			entryA == nil || entryA.IsSpent() {
+			viewAEntries[outpoint] = entryB
 		}
 	}
 }
@@ -665,11 +665,9 @@ func createTreasuryBaseTx(subsidyCache *standalone.SubsidyCache, nextBlockHeight
 // which are not provably unspendable as available unspent transaction outputs.
 func spendTransaction(utxoView *blockchain.UtxoViewpoint, tx *dcrutil.Tx, height int64, isTreasuryEnabled bool) {
 	for _, txIn := range tx.MsgTx().TxIn {
-		originHash := &txIn.PreviousOutPoint.Hash
-		originIndex := txIn.PreviousOutPoint.Index
-		entry := utxoView.LookupEntry(originHash)
+		entry := utxoView.LookupEntry(txIn.PreviousOutPoint)
 		if entry != nil {
-			entry.SpendOutput(originIndex)
+			entry.Spend()
 		}
 	}
 
@@ -749,16 +747,14 @@ func (g *BlkTmplGenerator) maybeInsertStakeTx(stx *dcrutil.Tx, treeValid bool, i
 			continue
 		}
 
-		originHash := &txIn.PreviousOutPoint.Hash
-		utxIn := view.LookupEntry(originHash)
-		if utxIn == nil {
+		entry := view.LookupEntry(txIn.PreviousOutPoint)
+		if entry == nil {
 			missingInput = true
 			break
 		} else {
-			originIdx := txIn.PreviousOutPoint.Index
-			txIn.ValueIn = utxIn.AmountByIndex(originIdx)
-			txIn.BlockHeight = uint32(utxIn.BlockHeight())
-			txIn.BlockIndex = utxIn.BlockIndex()
+			txIn.ValueIn = entry.Amount()
+			txIn.BlockHeight = uint32(entry.BlockHeight())
+			txIn.BlockIndex = entry.BlockIndex()
 		}
 	}
 	return !missingInput
@@ -1221,9 +1217,8 @@ mempoolLoop:
 			}
 
 			originHash := &txIn.PreviousOutPoint.Hash
-			originIndex := txIn.PreviousOutPoint.Index
-			utxoEntry := utxos.LookupEntry(originHash)
-			if utxoEntry == nil || utxoEntry.IsOutputSpent(originIndex) {
+			entry := utxos.LookupEntry(txIn.PreviousOutPoint)
+			if entry == nil || entry.IsSpent() {
 				if !g.cfg.TxSource.HaveTransaction(originHash) {
 					log.Tracef("Skipping tx %s because "+
 						"it references unspent output "+
@@ -1957,9 +1952,9 @@ nextPriorityQueueItem:
 			break
 		}
 
-		utxs, err := g.cfg.FetchUtxoView(tx, !knownDisapproved)
+		view, err := g.cfg.FetchUtxoView(tx, !knownDisapproved)
 		if err != nil {
-			str := fmt.Sprintf("failed to fetch input utxs for tx %v: %s",
+			str := fmt.Sprintf("failed to fetch utxo view for tx %v: %s",
 				tx.Hash(), err.Error())
 			return nil, makeError(ErrFetchTxStore, str)
 		}
@@ -1970,17 +1965,15 @@ nextPriorityQueueItem:
 		tx = txCopy
 
 		for _, txIn := range tx.MsgTx().TxIn {
-			originHash := &txIn.PreviousOutPoint.Hash
-			utx := utxs.LookupEntry(originHash)
-			if utx == nil {
+			entry := view.LookupEntry(txIn.PreviousOutPoint)
+			if entry == nil {
 				// Set a flag with the index so we can properly set
 				// the fraud proof below.
 				txIn.BlockIndex = wire.NullBlockIndex
 			} else {
-				originIdx := txIn.PreviousOutPoint.Index
-				txIn.ValueIn = utx.AmountByIndex(originIdx)
-				txIn.BlockHeight = uint32(utx.BlockHeight())
-				txIn.BlockIndex = utx.BlockIndex()
+				txIn.ValueIn = entry.Amount()
+				txIn.BlockHeight = uint32(entry.BlockHeight())
+				txIn.BlockIndex = entry.BlockIndex()
 			}
 		}
 	}
diff --git a/internal/mining/mining_harness_test.go b/internal/mining/mining_harness_test.go
index 10156e94bd..51e1b7eb4a 100644
--- a/internal/mining/mining_harness_test.go
+++ b/internal/mining/mining_harness_test.go
@@ -140,16 +140,26 @@ func (c *fakeChain) FetchUtxoView(tx *dcrutil.Tx, treeValid bool) (*blockchain.U
 	// All entries are cloned to ensure modifications to the returned view
 	// do not affect the fake chain's view.
 
-	// Add an entry for the tx itself to the new view.
+	msgTx := tx.MsgTx()
+	txType := stake.DetermineTxType(msgTx, c.isTreasuryAgendaActive)
+	tree := wire.TxTreeRegular
+	if txType != stake.TxTypeRegular {
+		tree = wire.TxTreeStake
+	}
+
+	// Add entries for the outputs of the tx itself to the new view.
 	viewpoint := blockchain.NewUtxoViewpoint(nil)
-	entry := c.utxos.LookupEntry(tx.Hash())
-	viewpoint.Entries()[*tx.Hash()] = entry.Clone()
+	prevOut := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
+	for txOutIdx := range msgTx.TxOut {
+		prevOut.Index = uint32(txOutIdx)
+		entry := c.utxos.LookupEntry(prevOut)
+		viewpoint.Entries()[prevOut] = entry.Clone()
+	}
 
 	// Add entries for all of the inputs to the tx to the new view.
 	for _, txIn := range tx.MsgTx().TxIn {
-		originHash := &txIn.PreviousOutPoint.Hash
-		entry := c.utxos.LookupEntry(originHash)
-		viewpoint.Entries()[*originHash] = entry.Clone()
+		entry := c.utxos.LookupEntry(txIn.PreviousOutPoint)
+		viewpoint.Entries()[txIn.PreviousOutPoint] = entry.Clone()
 	}
 
 	return viewpoint, c.fetchUtxoViewErr
@@ -358,10 +368,10 @@ func (p *fakeTxSource) fetchRedeemers(outpoints map[wire.OutPoint]*dcrutil.Tx, t
 	tree := wire.TxTreeRegular
 	seen := map[chainhash.Hash]struct{}{}
 	redeemers := make([]*dcrutil.Tx, 0)
-	prevOut := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
+	outpoint := wire.OutPoint{Hash: *tx.Hash(), Tree: tree}
 	for i := uint32(0); i < uint32(len(tx.MsgTx().TxOut)); i++ {
-		prevOut.Index = i
-		txRedeemer, exists := outpoints[prevOut]
+		outpoint.Index = i
+		txRedeemer, exists := outpoints[outpoint]
 		if !exists {
 			continue
 		}
@@ -413,13 +423,7 @@ func (p *fakeTxSource) removeOrphan(tx *dcrutil.Tx, removeRedeemers bool, isTrea
 
 	// Remove any orphans that redeem outputs from this one if requested.
 	if removeRedeemers {
-		txType := stake.DetermineTxType(tx.MsgTx(), isTreasuryEnabled)
-		tree := wire.TxTreeRegular
-		if txType != stake.TxTypeRegular {
-			tree = wire.TxTreeStake
-		}
-
-		prevOut := wire.OutPoint{Hash: *txHash, Tree: tree}
+		prevOut := wire.OutPoint{Hash: *txHash, Tree: tx.Tree()}
 		for txOutIdx := range tx.MsgTx().TxOut {
 			prevOut.Index = uint32(txOutIdx)
 			for _, orphan := range p.orphansByPrev[prevOut] {
@@ -661,8 +665,8 @@ func (p *fakeTxSource) maybeAcceptTransaction(tx *dcrutil.Tx, isNew bool) ([]*ch
 			continue
 		}
 
-		entry := utxoView.LookupEntry(&txIn.PreviousOutPoint.Hash)
-		if entry == nil || entry.IsFullySpent() {
+		entry := utxoView.LookupEntry(txIn.PreviousOutPoint)
+		if entry == nil || entry.IsSpent() {
 			// Must make a copy of the hash here since the iterator
 			// is replaced and taking its address directly would
 			// result in all of the entries pointing to the same
@@ -678,10 +682,9 @@ func (p *fakeTxSource) maybeAcceptTransaction(tx *dcrutil.Tx, isNew bool) ([]*ch
 					txIn.PreviousOutPoint.Hash)
 				continue
 			}
-			if entry.IsFullySpent() {
-				log.Tracef("Transaction %v uses full spent input %v "+
-					"and will be considered an orphan", txHash,
-					txIn.PreviousOutPoint.Hash)
+			if entry.IsSpent() {
+				log.Tracef("Transaction %v uses spent input %v and will be considered "+
+					"an orphan", txHash, txIn.PreviousOutPoint.Hash)
 			}
 		}
 	}
@@ -878,19 +881,25 @@ func (p *fakeTxSource) fetchInputUtxos(tx *dcrutil.Tx, isTreasuryEnabled bool) (
 	}
 
 	// Attempt to populate any missing inputs from the transaction pool.
-	for originHash, entry := range utxoView.Entries() {
-		if entry != nil && !entry.IsFullySpent() {
+	for _, txIn := range tx.MsgTx().TxIn {
+		prevOut := &txIn.PreviousOutPoint
+		entry := utxoView.LookupEntry(*prevOut)
+		if entry != nil && !entry.IsSpent() {
 			continue
 		}
 
-		if poolTxDesc, exists := p.pool[originHash]; exists {
-			utxoView.AddTxOuts(poolTxDesc.Tx, UnminedHeight, wire.NullBlockIndex,
-				isTreasuryEnabled)
+		if poolTxDesc, exists := p.pool[prevOut.Hash]; exists {
+			// AddTxOut ignores out of range index values, so it is safe to call without
+			// bounds checking here.
+			utxoView.AddTxOut(poolTxDesc.Tx, prevOut.Index, UnminedHeight,
+				wire.NullBlockIndex, isTreasuryEnabled)
 		}
 
-		if stagedTx, exists := p.staged[originHash]; exists {
-			utxoView.AddTxOuts(stagedTx, UnminedHeight, wire.NullBlockIndex,
-				isTreasuryEnabled)
+		if stagedTx, exists := p.staged[prevOut.Hash]; exists {
+			// AddTxOut ignores out of range index values, so it is safe to call without
+			// bounds checking here.
+			utxoView.AddTxOut(stagedTx, prevOut.Index, UnminedHeight,
+				wire.NullBlockIndex, isTreasuryEnabled)
 		}
 	}
 
diff --git a/internal/mining/mining_view_test.go b/internal/mining/mining_view_test.go
index 6c3fb884c6..457a56661b 100644
--- a/internal/mining/mining_view_test.go
+++ b/internal/mining/mining_view_test.go
@@ -497,7 +497,8 @@ func TestAncestorTrackingLimits(t *testing.T) {
 	for index := len(allTxns) - 1; index >= 0; index-- {
 		tx := allTxns[index]
 		txHash := tx.Hash()
-		harness.chain.utxos.LookupEntry(txHash).SpendOutput(0)
+		outpoint := wire.OutPoint{Hash: *txHash, Index: 0, Tree: wire.TxTreeRegular}
+		harness.chain.utxos.LookupEntry(outpoint).Spend()
 		_, err = harness.AddTransactionToTxSource(tx)
 		if err != nil {
 			t.Fatalf("unable to add transaction to the tx source: %v", err)
diff --git a/internal/netsync/manager.go b/internal/netsync/manager.go
index efd63452d5..ce8b4f50ff 100644
--- a/internal/netsync/manager.go
+++ b/internal/netsync/manager.go
@@ -14,6 +14,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/decred/dcrd/blockchain/stake/v4"
 	"github.com/decred/dcrd/blockchain/v4"
 	"github.com/decred/dcrd/chaincfg/chainhash"
 	"github.com/decred/dcrd/chaincfg/v3"
@@ -110,10 +111,11 @@ type getSyncPeerMsg struct {
 // this through the sync manager so the sync manager doesn't ban the peer
 // when it sends this information back.
 type requestFromPeerMsg struct {
-	peer   *peerpkg.Peer
-	blocks []*chainhash.Hash
-	txs    []*chainhash.Hash
-	reply  chan requestFromPeerResponse
+	peer         *peerpkg.Peer
+	blocks       []*chainhash.Hash
+	voteHashes   []*chainhash.Hash
+	tSpendHashes []*chainhash.Hash
+	reply        chan requestFromPeerResponse
 }
 
 // requestFromPeerResponse is a response sent to the reply channel of a
@@ -1301,13 +1303,34 @@ func (m *SyncManager) haveInventory(invVect *wire.InvVect) (bool, error) {
 			return true, nil
 		}
 
-		// Check if the transaction exists from the point of view of the
-		// end of the main chain.
-		entry, err := m.cfg.Chain.FetchUtxoEntry(&invVect.Hash)
-		if err != nil {
-			return false, err
+		// Check if the transaction exists from the point of view of the main chain
+		// tip.  Note that this is only a best effort since it is expensive to check
+		// existence of every output and the only purpose of this check is to avoid
+		// downloading already known transactions.
+		//
+		// The first three outputs are checked because it covers the majority of
+		// common scenarios, including:
+		//   - The vast majority of regular transactions consist of two outputs
+		//     where one is some form of "pay-to-somebody-else" and the other is a
+		//     change output.
+		//   - For some stake transactions (e.g. votes) the first two outputs will
+		//     never be found as a utxo, since they are not spendable, so we need to
+		//     check through at least the third output.
+		outpoint := wire.OutPoint{Hash: invVect.Hash}
+		trees := []int8{wire.TxTreeRegular, wire.TxTreeStake}
+		for _, tree := range trees {
+			outpoint.Tree = tree
+			for i := uint32(0); i < 3; i++ {
+				outpoint.Index = i
+				entry, err := m.cfg.Chain.FetchUtxoEntry(outpoint)
+				if err != nil {
+					return false, err
+				}
+				if entry != nil && !entry.IsSpent() {
+					return true, nil
+				}
+			}
 		}
-		return entry != nil && !entry.IsFullySpent(), nil
 	}
 
 	// The requested inventory is an unsupported type, so just claim
@@ -1556,7 +1579,8 @@ out:
 				msg.reply <- peerID
 
 			case requestFromPeerMsg:
-				err := m.requestFromPeer(msg.peer, msg.blocks, msg.txs)
+				err := m.requestFromPeer(msg.peer, msg.blocks, msg.voteHashes,
+					msg.tSpendHashes)
 				msg.reply <- requestFromPeerResponse{
 					err: err,
 				}
@@ -1721,16 +1745,20 @@ func (m *SyncManager) SyncPeerID() int32 {
 // RequestFromPeer allows an outside caller to request blocks or transactions
 // from a peer.  The requests are logged in the internal map of requests so the
 // peer is not later banned for sending the respective data.
-func (m *SyncManager) RequestFromPeer(p *peerpkg.Peer, blocks, txs []*chainhash.Hash) error {
+func (m *SyncManager) RequestFromPeer(p *peerpkg.Peer, blocks,
+	voteHashes []*chainhash.Hash, tSpendHashes []*chainhash.Hash) error {
+
 	reply := make(chan requestFromPeerResponse)
-	m.msgChan <- requestFromPeerMsg{peer: p, blocks: blocks, txs: txs,
-		reply: reply}
+	m.msgChan <- requestFromPeerMsg{peer: p, blocks: blocks,
+		voteHashes: voteHashes, tSpendHashes: tSpendHashes, reply: reply}
 	response := <-reply
 
 	return response.err
 }
 
-func (m *SyncManager) requestFromPeer(p *peerpkg.Peer, blocks, txs []*chainhash.Hash) error {
+func (m *SyncManager) requestFromPeer(p *peerpkg.Peer, blocks,
+	voteHashes []*chainhash.Hash, tSpendHashes []*chainhash.Hash) error {
+
 	peer := lookupPeer(p, m.peers)
 	if peer == nil {
 		return fmt.Errorf("unknown peer %s", p)
@@ -1763,41 +1791,80 @@ func (m *SyncManager) requestFromPeer(p *peerpkg.Peer, blocks, txs []*chainhash.
 		m.requestedBlocks[*bh] = struct{}{}
 	}
 
-	// Add the vote transactions to the request.
-	for _, vh := range txs {
-		// If we've already requested this transaction, skip it.
-		_, alreadyReqP := peer.requestedTxns[*vh]
-		_, alreadyReqB := m.requestedTxns[*vh]
-
-		if alreadyReqP || alreadyReqB {
-			continue
+	addTxsToRequest := func(txs []*chainhash.Hash, txType stake.TxType) error {
+		// Return immediately if txs is nil.
+		if txs == nil {
+			return nil
 		}
 
-		// Ask the transaction memory pool if the transaction is known
-		// to it in any form (main pool or orphan).
-		if m.cfg.TxMemPool.HaveTransaction(vh) {
-			continue
-		}
+		for _, tx := range txs {
+			// If we've already requested this transaction, skip it.
+			_, alreadyReqP := peer.requestedTxns[*tx]
+			_, alreadyReqB := m.requestedTxns[*tx]
 
-		// Check if the transaction exists from the point of view of the
-		// end of the main chain.
-		entry, err := m.cfg.Chain.FetchUtxoEntry(vh)
-		if err != nil {
-			return err
-		}
-		if entry != nil {
-			continue
-		}
+			if alreadyReqP || alreadyReqB {
+				continue
+			}
 
-		err = msgResp.AddInvVect(wire.NewInvVect(wire.InvTypeTx, vh))
-		if err != nil {
-			return fmt.Errorf("unexpected error encountered building request "+
-				"for mining state vote %v: %v",
-				vh, err.Error())
+			// Ask the transaction memory pool if the transaction is known
+			// to it in any form (main pool or orphan).
+			if m.cfg.TxMemPool.HaveTransaction(tx) {
+				continue
+			}
+
+			// Check if the transaction exists from the point of view of the main
+			// chain tip.  Note that this is only a best effort since it is expensive
+			// to check existence of every output and the only purpose of this check
+			// is to avoid requesting already known transactions.
+			//
+			// Check for a specific outpoint based on the tx type.
+			outpoint := wire.OutPoint{Hash: *tx}
+			switch txType {
+			case stake.TxTypeSSGen:
+				// The first two outputs of vote transactions are OP_RETURN <data>, and
+				// therefore never exist as an unspent txo.  Use the third output, as
+				// the third output (and subsequent outputs) are OP_SSGEN outputs.
+				outpoint.Index = 2
+				outpoint.Tree = wire.TxTreeStake
+			case stake.TxTypeTSpend:
+				// The first output of a tSpend transaction is OP_RETURN <data>, and
+				// therefore never exists as an unspent txo.  Use the second output, as
+				// the second output (and subsequent outputs) are OP_TGEN outputs.
+				outpoint.Index = 1
+				outpoint.Tree = wire.TxTreeStake
+			}
+			entry, err := m.cfg.Chain.FetchUtxoEntry(outpoint)
+			if err != nil {
+				return err
+			}
+			if entry != nil {
+				continue
+			}
+
+			err = msgResp.AddInvVect(wire.NewInvVect(wire.InvTypeTx, tx))
+			if err != nil {
+				return fmt.Errorf("unexpected error encountered building request "+
+					"for mining state vote %v: %v",
+					tx, err.Error())
+			}
+
+			peer.requestedTxns[*tx] = struct{}{}
+			m.requestedTxns[*tx] = struct{}{}
 		}
 
-		peer.requestedTxns[*vh] = struct{}{}
-		m.requestedTxns[*vh] = struct{}{}
+		return nil
+	}
+
+	// Add the vote transactions to the request.
+	err := addTxsToRequest(voteHashes, stake.TxTypeSSGen)
+	if err != nil {
+		return err
+	}
+
+	// Add the tspend transactions to the request.
+	err = addTxsToRequest(tSpendHashes, stake.TxTypeTSpend)
+	if err != nil {
+		return err
 	}
 
 	if len(msgResp.InvList) > 0 {
diff --git a/internal/rpcserver/interface.go b/internal/rpcserver/interface.go
index 25960f6aea..2fe00f8cbe 100644
--- a/internal/rpcserver/interface.go
+++ b/internal/rpcserver/interface.go
@@ -169,51 +169,35 @@ type UtxoEntry interface {
 	// ToUtxoEntry returns the underlying UtxoEntry instance.
 	ToUtxoEntry() *blockchain.UtxoEntry
 
-	// TransactionType returns the type of the transaction the utxo entry
-	// represents.
+	// TransactionType returns the type of the transaction that the output is
+	// contained in.
 	TransactionType() stake.TxType
 
-	// IsOutputSpent returns whether or not the provided output index has been
-	// spent based upon the current state of the unspent transaction output view
-	// the entry was obtained from.
-	//
-	// Returns true if the output index references an output that does not exist
-	// either due to it being invalid or because the output is not part of the view
-	// due to previously being spent/pruned.
-	IsOutputSpent(outputIndex uint32) bool
+	// IsSpent returns whether or not the output has been spent based upon the
+	// current state of the unspent transaction output view it was obtained from.
+	IsSpent() bool
 
-	// BlockHeight returns the height of the block containing the transaction the
-	// utxo entry represents.
+	// BlockHeight returns the height of the block containing the output.
 	BlockHeight() int64
 
-	// TxVersion returns the version of the transaction the utxo represents.
-	TxVersion() uint16
+	// Amount returns the amount of the output.
+	Amount() int64
 
-	// AmountByIndex returns the amount of the provided output index.
-	//
-	// Returns 0 if the output index references an output that does not exist
-	// either due to it being invalid or because the output is not part of the view
-	// due to previously being spent/pruned.
-	AmountByIndex(outputIndex uint32) int64
+	// ScriptVersion returns the public key script version for the output.
+	ScriptVersion() uint16
 
-	// ScriptVersionByIndex returns the public key script for the provided output
-	// index.
-	//
-	// Returns 0 if the output index references an output that does not exist
-	// either due to it being invalid or because the output is not part of the view
-	// due to previously being spent/pruned.
-	ScriptVersionByIndex(outputIndex uint32) uint16
+	// PkScript returns the public key script for the output.
+	PkScript() []byte
 
-	// PkScriptByIndex returns the public key script for the provided output index.
-	//
-	// Returns nil if the output index references an output that does not exist
-	// either due to it being invalid or because the output is not part of the view
-	// due to previously being spent/pruned.
-	PkScriptByIndex(outputIndex uint32) []byte
-
-	// IsCoinBase returns whether or not the transaction the utxo entry represents
-	// is a coinbase.
+	// IsCoinBase returns whether or not the output was contained in a coinbase
+	// transaction.
 	IsCoinBase() bool
+
+	// TicketMinimalOutputs returns the minimal outputs for the ticket transaction
+	// that the output is contained in.  Note that the ticket minimal outputs are
+	// only stored in ticket submission outputs and nil will be returned for all
+	// other output types.
+	TicketMinimalOutputs() []*stake.MinimalOutput
 }
 
 // Chain represents a chain for use with the RPC server.
@@ -272,11 +256,6 @@ type Chain interface {
 	// hash has been missed in the live ticket treap of the best node.
 	CheckMissedTickets(hashes []chainhash.Hash) []bool
 
-	// ConvertUtxosToMinimalOutputs converts the contents of a UTX to a series of
-	// minimal outputs. It does this so that these can be passed to stake subpackage
-	// functions, where they will be evaluated for correctness.
-	ConvertUtxosToMinimalOutputs(entry UtxoEntry) []*stake.MinimalOutput
-
 	// CountVoteVersion returns the total number of version votes for the current
 	// rule change activation interval.
 	CountVoteVersion(version uint32) (uint32, error)
@@ -288,17 +267,17 @@ type Chain interface {
 	// the interval.
 	EstimateNextStakeDifficulty(hash *chainhash.Hash, newTickets int64, useMaxTickets bool) (int64, error)
 
-	// FetchUtxoEntry loads and returns the unspent transaction output entry for the
-	// passed hash from the point of view of the end of the main chain.
+	// FetchUtxoEntry loads and returns the requested unspent transaction output
+	// from the point of view of the main chain tip.
 	//
-	// NOTE: Requesting a hash for which there is no data must NOT return an error.
-	// Instead both the entry and the error must be nil.  This is done to allow
-	// pruning of fully spent transactions.  In practice this means the caller must
-	// check if the returned entry is nil before invoking methods on it.
+	// NOTE: Requesting an output for which there is no data will NOT return an
+	// error.  Instead both the entry and the error will be nil.  This is done to
+	// allow pruning of spent transaction outputs.  In practice this means the
+	// caller must check if the returned entry is nil before invoking methods on it.
 	//
 	// This function is safe for concurrent access however the returned entry (if
 	// any) is NOT.
-	FetchUtxoEntry(txHash *chainhash.Hash) (UtxoEntry, error)
+	FetchUtxoEntry(outpoint wire.OutPoint) (UtxoEntry, error)
 
 	// FetchUtxoStats returns statistics on the current utxo set.
 	FetchUtxoStats() (*blockchain.UtxoStats, error)
diff --git a/internal/rpcserver/rpcserver.go b/internal/rpcserver/rpcserver.go
index 28cfae899c..9dbd8eb297 100644
--- a/internal/rpcserver/rpcserver.go
+++ b/internal/rpcserver/rpcserver.go
@@ -966,17 +966,22 @@ func handleCreateRawSSRtx(_ context.Context, s *Server, cmd interface{}) (interf
 	}
 
 	// Try to fetch the ticket from the block database.
-	ticketUtx, err := s.cfg.Chain.FetchUtxoEntry(txHash)
-	if ticketUtx == nil || err != nil {
+	outpoint := wire.OutPoint{Hash: *txHash, Index: input.Vout, Tree: input.Tree}
+	ticketUtxo, err := s.cfg.Chain.FetchUtxoEntry(outpoint)
+	if ticketUtxo == nil || err != nil {
 		return nil, rpcNoTxInfoError(txHash)
 	}
-	if t := ticketUtx.TransactionType(); t != stake.TxTypeSStx {
+	if t := ticketUtxo.TransactionType(); t != stake.TxTypeSStx {
 		return nil, rpcDeserializationError("Invalid Tx type: %v", t)
 	}
 
 	// Store the sstx pubkeyhashes and amounts as found in the transaction
 	// outputs.
-	minimalOutputs := s.cfg.Chain.ConvertUtxosToMinimalOutputs(ticketUtx)
+	minimalOutputs := ticketUtxo.TicketMinimalOutputs()
+	if minimalOutputs == nil {
+		return nil, rpcInternalError("Missing ticket minimal outputs", "")
+	}
+
 	ssrtxPayTypes, ssrtxPkhs, sstxAmts, _, _, _ :=
 		stake.SStxStakeOutputInfo(minimalOutputs)
 
@@ -3440,7 +3445,6 @@ func handleGetTxOut(_ context.Context, s *Server, cmd interface{}) (interface{},
 	var pkScript []byte
 	var isCoinbase bool
 	var isTreasuryEnabled bool
-	var txTree int8
 	includeMempool := true
 	if c.IncludeMempool != nil {
 		includeMempool = *c.IncludeMempool
@@ -3448,6 +3452,14 @@ func handleGetTxOut(_ context.Context, s *Server, cmd interface{}) (interface{},
 	var txFromMempool *dcrutil.Tx
 	if includeMempool {
 		txFromMempool, _ = s.cfg.TxMempooler.FetchTransaction(txHash)
+
+		// Set as nil if the tx tree does not match the tree param that was passed.
+		// This is set as nil rather than returning immediately here since it is
+		// technically possible (though extremely unlikely) that the tx exists
+		// elsewhere, so it should still continue and check elsewhere below.
+		if txFromMempool != nil && txFromMempool.Tree() != c.Tree {
+			txFromMempool = nil
+		}
 	}
 	if txFromMempool != nil {
 		mtx := txFromMempool.MsgTx()
@@ -3480,9 +3492,9 @@ func handleGetTxOut(_ context.Context, s *Server, cmd interface{}) (interface{},
 		scriptVersion = txOut.Version
 		pkScript = txOut.PkScript
 		isCoinbase = standalone.IsCoinBaseTx(mtx, isTreasuryEnabled)
-		txTree = txFromMempool.Tree()
 	} else {
-		entry, err := chain.FetchUtxoEntry(txHash)
+		outpoint := wire.OutPoint{Hash: *txHash, Index: c.Vout, Tree: c.Tree}
+		entry, err := chain.FetchUtxoEntry(outpoint)
 		if err != nil {
 			context := "Failed to retrieve utxo entry"
 			return nil, rpcInternalError(err.Error(), context)
@@ -3494,7 +3506,7 @@ func handleGetTxOut(_ context.Context, s *Server, cmd interface{}) (interface{},
 		// transaction already in the main chain.  Mined transactions
 		// that are spent by a mempool transaction are not affected by
 		// this.
-		if entry == nil || entry.IsOutputSpent(c.Vout) {
+		if entry == nil || entry.IsSpent() {
 			return nil, nil
 		}
 
@@ -3513,19 +3525,10 @@ func handleGetTxOut(_ context.Context, s *Server, cmd interface{}) (interface{},
 
 		bestBlockHash = best.Hash.String()
 		confirmations = 1 + best.Height - entry.BlockHeight()
-		value = entry.AmountByIndex(c.Vout)
-		scriptVersion = entry.ScriptVersionByIndex(c.Vout)
-		pkScript = entry.PkScriptByIndex(c.Vout)
+		value = entry.Amount()
+		scriptVersion = entry.ScriptVersion()
+		pkScript = entry.PkScript()
 		isCoinbase = entry.IsCoinBase()
-		txTree = wire.TxTreeRegular
-		if entry.TransactionType() != stake.TxTypeRegular {
-			txTree = wire.TxTreeStake
-		}
-	}
-
-	// Return nil if the tx tree does not match the tree param that was passed.
-	if txTree != c.Tree {
-		return nil, nil
 	}
 
 	// Disassemble script into single line printable format.  The
diff --git a/internal/rpcserver/rpcserverhandlers_test.go b/internal/rpcserver/rpcserverhandlers_test.go
index 0473da0918..5cbe276a3f 100644
--- a/internal/rpcserver/rpcserverhandlers_test.go
+++ b/internal/rpcserver/rpcserverhandlers_test.go
@@ -56,17 +56,16 @@ const testDataPath = "testdata"
 
 // testRPCUtxoEntry provides a mock utxo entry by implementing the UtxoEntry interface.
 type testRPCUtxoEntry struct {
-	amountByIndex        int64
+	amount               int64
 	hasExpiry            bool
 	height               uint32
 	index                uint32
 	isCoinBase           bool
-	isOutputSpent        bool
-	modified             bool
-	pkScriptByIndex      []byte
-	scriptVersionByIndex uint16
+	isSpent              bool
+	pkScript             []byte
+	scriptVersion        uint16
+	ticketMinimalOutputs []*stake.MinimalOutput
 	txType               stake.TxType
-	txVersion            uint16
 }
 
 // ToUtxoEntry returns a mocked underlying UtxoEntry instance.
@@ -74,49 +73,50 @@ func (u *testRPCUtxoEntry) ToUtxoEntry() *blockchain.UtxoEntry {
 	return nil
 }
 
-// TransactionType returns a mocked txType of the testRPCUtxoEntry.
+// TransactionType returns a mocked type of the transaction that the output is
+// contained in.
 func (u *testRPCUtxoEntry) TransactionType() stake.TxType {
 	return u.txType
 }
 
-// IsOutputSpent returns a mocked bool representing whether or not the provided
-// output index has been spent.
-func (u *testRPCUtxoEntry) IsOutputSpent(outputIndex uint32) bool {
-	return u.isOutputSpent
+// IsSpent returns a mocked bool representing whether or not the output has been
+// spent.
+func (u *testRPCUtxoEntry) IsSpent() bool {
+	return u.isSpent
 }
 
-// BlockHeight returns a mocked height of the testRPCUtxoEntry.
+// BlockHeight returns a mocked height of the block containing the output.
 func (u *testRPCUtxoEntry) BlockHeight() int64 {
 	return int64(u.height)
 }
 
-// TxVersion returns a mocked txVersion of the testRPCUtxoEntry.
-func (u *testRPCUtxoEntry) TxVersion() uint16 {
-	return u.txVersion
+// Amount returns a mocked amount of the output.
+func (u *testRPCUtxoEntry) Amount() int64 {
+	return u.amount
 }
 
-// AmountByIndex returns a mocked amount of the provided output index.
-func (u *testRPCUtxoEntry) AmountByIndex(outputIndex uint32) int64 {
-	return u.amountByIndex
+// ScriptVersion returns a mocked public key script version of the output.
+func (u *testRPCUtxoEntry) ScriptVersion() uint16 {
+	return u.scriptVersion
 }
 
-// ScriptVersionByIndex returns a mocked public key script for the provided
-// output index.
-func (u *testRPCUtxoEntry) ScriptVersionByIndex(outputIndex uint32) uint16 {
-	return u.scriptVersionByIndex
+// PkScript returns a mocked public key script of the output.
+func (u *testRPCUtxoEntry) PkScript() []byte {
+	return u.pkScript
 }
 
-// PkScriptByIndex returns a mocked public key script for the provided output
-// index.
-func (u *testRPCUtxoEntry) PkScriptByIndex(outputIndex uint32) []byte {
-	return u.pkScriptByIndex
-}
-
-// IsCoinBase returns a mocked isCoinBase bool of the testRPCUtxoEntry.
+// IsCoinBase returns a mocked bool representing whether or not the output was
+// contained in a coinbase transaction.
 func (u *testRPCUtxoEntry) IsCoinBase() bool {
 	return u.isCoinBase
 }
 
+// TicketMinimalOutputs returns mocked minimal outputs for the ticket
+// transaction that the output is contained in.
+func (u *testRPCUtxoEntry) TicketMinimalOutputs() []*stake.MinimalOutput {
+	return u.ticketMinimalOutputs
+}
+
 // tspendVotes is used to mock the results of a chain TSpendCountVotes call.
 type tspendVotes struct {
 	yes int64
@@ -145,7 +145,6 @@ type testRPCChain struct {
 	checkLiveTicket               bool
 	checkLiveTickets              []bool
 	checkMissedTickets            []bool
-	convertUtxosToMinimalOutputs  []*stake.MinimalOutput
 	countVoteVersion              uint32
 	countVoteVersionErr           error
 	estimateNextStakeDifficultyFn func(hash *chainhash.Hash, newTickets int64, useMaxTickets bool) (diff int64, err error)
@@ -263,11 +262,6 @@ func (c *testRPCChain) CheckMissedTickets(hashes []chainhash.Hash) []bool {
 	return c.checkMissedTickets
 }
 
-// ConvertUtxosToMinimalOutputs returns a mocked MinimalOutput slice.
-func (c *testRPCChain) ConvertUtxosToMinimalOutputs(entry UtxoEntry) []*stake.MinimalOutput {
-	return c.convertUtxosToMinimalOutputs
-}
-
 // CountVoteVersion returns a mocked total number of version votes for the current
 // rule change activation interval.
 func (c *testRPCChain) CountVoteVersion(version uint32) (uint32, error) {
@@ -280,7 +274,7 @@ func (c *testRPCChain) EstimateNextStakeDifficulty(hash *chainhash.Hash, newTick
 }
 
 // FetchUtxoEntry returns a mocked UtxoEntry.
-func (c *testRPCChain) FetchUtxoEntry(txHash *chainhash.Hash) (UtxoEntry, error) {
+func (c *testRPCChain) FetchUtxoEntry(outpoint wire.OutPoint) (UtxoEntry, error) {
 	return c.fetchUtxoEntry, c.fetchUtxoEntryErr
 }
 
@@ -1393,19 +1387,6 @@ func defaultMockRPCChain() *testRPCChain {
 			Status:    "active",
 		}},
 		chainWork: chainWork,
-		convertUtxosToMinimalOutputs: []*stake.MinimalOutput{{
-			PkScript: hexToBytes("baa914780239ea1231ba67b0c5b82e786b51e21072522187"),
-			Value:    100000000,
-			Version:  0,
-		}, {
-			PkScript: hexToBytes("6a1e355c96f48612d57509140e9a049981d5f9970f945c770d00000000000058"),
-			Value:    0,
-			Version:  0,
-		}, {
-			PkScript: hexToBytes("bd76a914000000000000000000000000000000000000000088ac"),
-			Value:    0,
-			Version:  0,
-		}},
 		estimateNextStakeDifficultyFn: func(*chainhash.Hash, int64, bool) (int64, error) {
 			return 14336790201, nil
 		},
@@ -1413,7 +1394,19 @@ func defaultMockRPCChain() *testRPCChain {
 			hasExpiry: true,
 			height:    100000,
 			txType:    stake.TxTypeSStx,
-			txVersion: 1,
+			ticketMinimalOutputs: []*stake.MinimalOutput{{
+				PkScript: hexToBytes("baa914780239ea1231ba67b0c5b82e786b51e21072522187"),
+				Value:    100000000,
+				Version:  0,
+			}, {
+				PkScript: hexToBytes("6a1e355c96f48612d57509140e9a049981d5f9970f945c770d00000000000058"),
+				Value:    0,
+				Version:  0,
+			}, {
+				PkScript: hexToBytes("bd76a914000000000000000000000000000000000000000088ac"),
+				Value:    0,
+				Version:  0,
+			}},
 		},
 		fetchUtxoStats: &blockchain.UtxoStats{
 			Utxos:          1593879,
@@ -2129,34 +2122,39 @@ func TestHandleCreateRawSSRtx(t *testing.T) {
 		},
 		mockChain: func() *testRPCChain {
 			chain := defaultMockRPCChain()
-			chain.convertUtxosToMinimalOutputs = []*stake.MinimalOutput{{
-				PkScript: []byte{
-					0xBA, 0xA9, 0x14, 0x78, 0x02, 0x39, 0xEA, 0x12,
-					0x31, 0xBA, 0x67, 0xB0, 0xC5, 0xB8, 0x2E, 0x78,
-					0x6B, 0x51, 0xE2, 0x10, 0x72, 0x52, 0x21, 0x87,
-				},
-				Value:   100000000,
-				Version: 0,
-			}, {
-				PkScript: []byte{
-					0x6A, 0x1E, 0x35, 0x5C, 0x96, 0xF4, 0x86, 0x12,
-					0xD5, 0x75, 0x09, 0x14, 0x0E, 0x9A, 0x04, 0x99,
-					0x81, 0xD5, 0xF9, 0x97, 0x0F, 0x94,
-					0x5C, 0x77, 0x0D, 0x00, 0x00, 0x00, 0x00, 0x80, // commitamt (set MSB for P2SH)
-					0x00, 0x58,
-				},
-				Value:   0,
-				Version: 0,
-			}, {
-				PkScript: []byte{
-					0xBD, 0x76, 0xA9, 0x14, 0x00, 0x00, 0x00, 0x00,
-					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-					0x88, 0xAC,
-				},
-				Value:   0,
-				Version: 0,
-			}}
+			chain.fetchUtxoEntry = &testRPCUtxoEntry{
+				hasExpiry: true,
+				height:    100000,
+				txType:    stake.TxTypeSStx,
+				ticketMinimalOutputs: []*stake.MinimalOutput{{
+					PkScript: []byte{
+						0xBA, 0xA9, 0x14, 0x78, 0x02, 0x39, 0xEA, 0x12,
+						0x31, 0xBA, 0x67, 0xB0, 0xC5, 0xB8, 0x2E, 0x78,
+						0x6B, 0x51, 0xE2, 0x10, 0x72, 0x52, 0x21, 0x87,
+					},
+					Value:   100000000,
+					Version: 0,
+				}, {
+					PkScript: []byte{
+						0x6A, 0x1E, 0x35, 0x5C, 0x96, 0xF4, 0x86, 0x12,
+						0xD5, 0x75, 0x09, 0x14, 0x0E, 0x9A, 0x04, 0x99,
+						0x81, 0xD5, 0xF9, 0x97, 0x0F, 0x94,
+						0x5C, 0x77, 0x0D, 0x00, 0x00, 0x00, 0x00, 0x80, // commitamt (set MSB for P2SH)
+						0x00, 0x58,
+					},
+					Value:   0,
+					Version: 0,
+				}, {
+					PkScript: []byte{
+						0xBD, 0x76, 0xA9, 0x14, 0x00, 0x00, 0x00, 0x00,
+						0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+						0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+						0x88, 0xAC,
+					},
+					Value:   0,
+					Version: 0,
+				}},
+			}
 			return chain
 		}(),
 		result: "0100000001395ebc9af44c4a696fa8e6287bdbf0a89a4d6207f191cb0f1eefc25" +
@@ -2222,10 +2220,8 @@ func TestHandleCreateRawSSRtx(t *testing.T) {
 				txType:     stake.TxTypeRegular,
 				height:     100000,
 				index:      0,
-				txVersion:  1,
 				isCoinBase: false,
 				hasExpiry:  true,
-				modified:   false,
 			}
 			return chain
 		}(),
@@ -2268,34 +2264,39 @@ func TestHandleCreateRawSSRtx(t *testing.T) {
 		},
 		mockChain: func() *testRPCChain {
 			chain := defaultMockRPCChain()
-			chain.convertUtxosToMinimalOutputs = []*stake.MinimalOutput{{
-				PkScript: []byte{
-					0xBA, 0xA9, 0x14, 0x78, 0x02, 0x39, 0xEA, 0x12,
-					0x31, 0xBA, 0x67, 0xB0, 0xC5, 0xB8, 0x2E, 0x78,
-					0x6B, 0x51, 0xE2, 0x10, 0x72, 0x52, 0x21, 0x87,
-				},
-				Value:   100000000,
-				Version: 0,
-			}, {
-				PkScript: []byte{
-					0x6A, 0x1E, 0x35, 0x5C, 0x96, 0xF4, 0x86, 0x12,
-					0xD5, 0x75, 0x09, 0x14, 0x0E, 0x9A, 0x04, 0x99,
-					0x81, 0xD5, 0xF9, 0x97, 0x0F, 0x94,
-					0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // commitamt (invalid amount)
-					0x00, 0x58,
-				},
-				Value:   0,
-				Version: 0,
-			}, {
-				PkScript: []byte{
-					0xBD, 0x76, 0xA9, 0x14, 0x00, 0x00, 0x00, 0x00,
-					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-					0x88, 0xAC,
-				},
-				Value:   0,
-				Version: 0,
-			}}
+			chain.fetchUtxoEntry = &testRPCUtxoEntry{
+				hasExpiry: true,
+				height:    100000,
+				txType:    stake.TxTypeSStx,
+				ticketMinimalOutputs: []*stake.MinimalOutput{{
+					PkScript: []byte{
+						0xBA, 0xA9, 0x14, 0x78, 0x02, 0x39, 0xEA, 0x12,
+						0x31, 0xBA, 0x67, 0xB0, 0xC5, 0xB8, 0x2E, 0x78,
+						0x6B, 0x51, 0xE2, 0x10, 0x72, 0x52, 0x21, 0x87,
+					},
+					Value:   100000000,
+					Version: 0,
+				}, {
+					PkScript: []byte{
+						0x6A, 0x1E, 0x35, 0x5C, 0x96, 0xF4, 0x86, 0x12,
+						0xD5, 0x75, 0x09, 0x14, 0x0E, 0x9A, 0x04, 0x99,
+						0x81, 0xD5, 0xF9, 0x97, 0x0F, 0x94,
+						0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // commitamt (invalid amount)
+						0x00, 0x58,
+					},
+					Value:   0,
+					Version: 0,
+				}, {
+					PkScript: []byte{
+						0xBD, 0x76, 0xA9, 0x14, 0x00, 0x00, 0x00, 0x00,
+						0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+						0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+						0x88, 0xAC,
+					},
+					Value:   0,
+					Version: 0,
+				}},
+			}
 			return chain
 		}(),
 		wantErr: true,
@@ -4868,13 +4869,12 @@ func TestHandleGetTxOut(t *testing.T) {
 	chainWithTx := func() *testRPCChain {
 		chain := defaultMockRPCChain()
 		chain.fetchUtxoEntry = &testRPCUtxoEntry{
-			amountByIndex:        txOut.Value,
-			height:               432100,
-			index:                1,
-			pkScriptByIndex:      script,
-			scriptVersionByIndex: scriptVersion,
-			txType:               stake.TxTypeRegular,
-			txVersion:            msgTx.Version,
+			amount:        txOut.Value,
+			height:        432100,
+			index:         1,
+			pkScript:      script,
+			scriptVersion: scriptVersion,
+			txType:        stake.TxTypeRegular,
 		}
 		return chain
 	}
@@ -4908,22 +4908,22 @@ func TestHandleGetTxOut(t *testing.T) {
 		}(),
 		result: nil,
 	}, {
-		name:    "handleGetTxOut: ok transaction exists but wrong tree",
+		name:    "handleGetTxOut: ok transaction exists in mempool but wrong tree",
 		handler: handleGetTxOut,
 		cmd:     &cmd,
 		mockChain: func() *testRPCChain {
 			chain := defaultMockRPCChain()
-			chain.fetchUtxoEntry = &testRPCUtxoEntry{
-				amountByIndex:        txOut.Value,
-				height:               432100,
-				index:                1,
-				pkScriptByIndex:      script,
-				scriptVersionByIndex: scriptVersion,
-				txType:               stake.TxTypeSStx,
-				txVersion:            msgTx.Version,
-			}
+			chain.fetchUtxoEntry = nil
 			return chain
 		}(),
+		mockTxMempooler: func() *testTxMempooler {
+			mp := defaultMockTxMempooler()
+			tx := dcrutil.NewTx(hexToMsgTx(txHex))
+			tx.SetTree(wire.TxTreeStake)
+			mp.fetchTransaction = tx
+			mp.fetchTransactionErr = nil
+			return mp
+		}(),
 		result: nil,
 	}, {
 		name:    "handleGetTxOut: invalid txid",
@@ -4966,6 +4966,7 @@ func TestHandleGetTxOut(t *testing.T) {
 		mockTxMempooler: func() *testTxMempooler {
 			mp := defaultMockTxMempooler()
 			tx := dcrutil.NewTx(hexToMsgTx(txHex))
+			tx.SetTree(wire.TxTreeRegular)
 			tx.MsgTx().TxOut[0] = nil
 			mp.fetchTransaction = tx
 			mp.fetchTransactionErr = nil
diff --git a/rpcadaptors.go b/rpcadaptors.go
index 795d2ee9fd..3f89c6184c 100644
--- a/rpcadaptors.go
+++ b/rpcadaptors.go
@@ -11,7 +11,6 @@ import (
 	"net"
 	"time"
 
-	"github.com/decred/dcrd/blockchain/stake/v4"
 	"github.com/decred/dcrd/blockchain/v4"
 	"github.com/decred/dcrd/chaincfg/chainhash"
 	"github.com/decred/dcrd/chaincfg/v3"
@@ -379,25 +378,18 @@ type rpcChain struct {
 // Ensure rpcChain implements the rpcserver.Chain interface.
 var _ rpcserver.Chain = (*rpcChain)(nil)
 
-// ConvertUtxosToMinimalOutputs converts the contents of a UTX to a series of
-// minimal outputs. It does this so that these can be passed to stake subpackage
-// functions, where they will be evaluated for correctness.
-func (c *rpcChain) ConvertUtxosToMinimalOutputs(entry rpcserver.UtxoEntry) []*stake.MinimalOutput {
-	return blockchain.ConvertUtxosToMinimalOutputs(entry.ToUtxoEntry())
-}
-
-// FetchUtxoEntry loads and returns the unspent transaction output entry for the
-// passed hash from the point of view of the end of the main chain.
+// FetchUtxoEntry loads and returns the requested unspent transaction output
+// from the point of view of the main chain tip.
 //
-// NOTE: Requesting a hash for which there is no data will NOT return an error.
-// Instead both the entry and the error will be nil.  This is done to allow
-// pruning of fully spent transactions.  In practice this means the caller must
-// check if the returned entry is nil before invoking methods on it.
+// NOTE: Requesting an output for which there is no data will NOT return an
+// error.  Instead both the entry and the error will be nil.  This is done to
+// allow pruning of spent transaction outputs.  In practice this means the
+// caller must check if the returned entry is nil before invoking methods on it.
 //
 // This function is safe for concurrent access however the returned entry (if
 // any) is NOT.
-func (c *rpcChain) FetchUtxoEntry(txHash *chainhash.Hash) (rpcserver.UtxoEntry, error) {
-	utxo, err := c.BlockChain.FetchUtxoEntry(txHash)
+func (c *rpcChain) FetchUtxoEntry(outpoint wire.OutPoint) (rpcserver.UtxoEntry, error) {
+	utxo, err := c.BlockChain.FetchUtxoEntry(outpoint)
 	if utxo == nil || err != nil {
 		return nil, err
 	}
diff --git a/server.go b/server.go
index b7299cec11..b5695368e6 100644
--- a/server.go
+++ b/server.go
@@ -855,7 +855,7 @@ func (sp *serverPeer) OnGetMiningState(p *peer.Peer, msg *wire.MsgGetMiningState
 // requests the data advertised in the message from the peer.
 func (sp *serverPeer) OnMiningState(p *peer.Peer, msg *wire.MsgMiningState) {
 	err := sp.server.syncManager.RequestFromPeer(sp.Peer, msg.BlockHashes,
-		msg.VoteHashes)
+		msg.VoteHashes, nil)
 	if err != nil {
 		peerLog.Warnf("couldn't handle mining state message: %v",
 			err.Error())
@@ -947,20 +947,21 @@ func (sp *serverPeer) OnGetInitState(p *peer.Peer, msg *wire.MsgGetInitState) {
 // requests the data advertised in the message from the peer.
 func (sp *serverPeer) OnInitState(p *peer.Peer, msg *wire.MsgInitState) {
 	blockHashes := make([]*chainhash.Hash, 0, len(msg.BlockHashes))
-	txHashes := make([]*chainhash.Hash, 0, len(msg.VoteHashes)+len(msg.TSpendHashes))
+	voteHashes := make([]*chainhash.Hash, 0, len(msg.VoteHashes))
+	tSpendHashes := make([]*chainhash.Hash, 0, len(msg.TSpendHashes))
 
 	for i := range msg.BlockHashes {
 		blockHashes = append(blockHashes, &msg.BlockHashes[i])
 	}
 	for i := range msg.VoteHashes {
-		txHashes = append(txHashes, &msg.VoteHashes[i])
+		voteHashes = append(voteHashes, &msg.VoteHashes[i])
 	}
 	for i := range msg.TSpendHashes {
-		txHashes = append(txHashes, &msg.TSpendHashes[i])
+		tSpendHashes = append(tSpendHashes, &msg.TSpendHashes[i])
 	}
 
 	err := sp.server.syncManager.RequestFromPeer(sp.Peer, blockHashes,
-		txHashes)
+		voteHashes, tSpendHashes)
 	if err != nil {
 		peerLog.Warnf("couldn't handle init state message: %v", err)
 	}