Decred support

coins.json

@@ -137,4 +137,42 @@
 	},
 	"dust_limit": 546,
 	"blocktime_minutes": 2.5
+},  {
+	"coin_name": "Decred",
+	"coin_shortcut": "DCR",
+	"address_type": 1855,
+	"maxfee_kb": 100000000,
+	"address_type_p2sh": 1818,
+	"address_type_p2wpkh": null,
+	"address_type_p2wsh": null,
+	"signed_message_header": "Decred Signed Message:\n",
+	"hash_genesis_block": "298e5cc3d985bfe7f81dc135f360abe089edd4396b86d2de66b0cef42b21d980",
+	"xpub_magic": "02fda926",
+	"xprv_magic": "02fda4e8",
+	"bip44": 20,
+	"segwit": false,
+	"default_fee_b": {
+		"Normal": 10
+	},
+  "dust_limit": 546,
+	"blocktime_minutes": 10
+},  {
+	"coin_name": "DecredTestnet",
+	"coin_shortcut": "DCRT",
+	"address_type": 3873,
+	"maxfee_kb": 100000000,
+	"address_type_p2sh": 3836,
+	"address_type_p2wpkh": null,
+	"address_type_p2wsh": null,
+	"signed_message_header": "Decred Signed Message:\n",
+	"hash_genesis_block": "298e5cc3d985bfe7f81dc135f360abe089edd4396b86d2de66b0cef42b21d980",
+	"xpub_magic": "043587d1",
+	"xprv_magic": "04358397",
+	"bip44": 11,
+	"segwit": false,
+	"default_fee_b": {
+		"Normal": 10
+	},
+  "dust_limit": 546,
+  "blocktime_minutes": 10
 }]

protob/messages.proto

@@ -81,7 +81,16 @@ enum MessageType {
 	MessageType_DebugLinkMemoryRead = 110 [(wire_debug_in) = true];
 	MessageType_DebugLinkMemory = 111 [(wire_debug_out) = true];
 	MessageType_DebugLinkMemoryWrite = 112 [(wire_debug_in) = true];
-	MessageType_DebugLinkFlashErase = 113 [(wire_debug_in) = true];
+  MessageType_DebugLinkFlashErase = 113 [(wire_debug_in) = true];
+  MessageType_DecredLoadDevice = 114 [(wire_in) = true];
+  MessageType_DecredGetAddress = 115 [(wire_in) = true];
+  MessageType_DecredAddress = 116 [(wire_out) = true];
+  MessageType_DecredEntropyAck = 117 [(wire_in) = true];
+  MessageType_DecredSignMessage = 118 [(wire_in) = true];
+  MessageType_DecredVerifyMessage = 119 [(wire_in) = true];
+  MessageType_DecredSignTx = 120 [(wire_in) = true];
+  MessageType_DecredTxAck = 121 [(wire_in) = true];
+  MessageType_DecredTxRequest = 122 [(wire_out) = true];
 }
 
 ////////////////////
@@ -348,6 +357,107 @@ message LoadDevice {
 	optional uint32 u2f_counter = 8;			// U2F counter
 }
 
+/**
+ * Request: Load Decred seed PGP word list from the computer
+ * @next ButtonRequest
+ * @next Success
+ * @next Failure
+ */
+message DecredLoadDevice {
+	optional string mnemonic = 1;				// seed encoded as BIP-39 mnemonic (12, 18 or 24 words)
+	optional HDNodeType node = 2;				// BIP-32 node
+	optional string pin = 3;				// set PIN protection
+	optional bool passphrase_protection = 4;		// enable master node encryption using passphrase
+	optional string language = 5 [default='english'];	// device language
+	optional string label = 6;				// device label
+	optional uint32 u2f_counter = 7;			// U2F counter
+}
+
+/**
+ * Request: Ask device for Decred address corresponding to address_n path
+ * @next PassphraseRequest
+ * @next DecredAddress
+ * @next Failure
+ */
+message DecredGetAddress {
+	repeated uint32 address_n = 1;			// BIP-32 path to derive the key from master node
+	optional bool show_display = 2;			// optionally show on display before sending the result
+}
+
+/**
+ * Response: Contains an Decred address derived from device private seed
+ * @prev DecredGetAddress
+ */
+message DecredAddress {
+  required string address = 1;        // Base58 encoded address string
+}
+
+/**
+ * Request: Provide additional entropy for seed generation function (Decred variant)
+ * @prev EntropyRequest
+ * @next ButtonRequest
+ */
+message DecredEntropyAck {
+	optional bytes entropy = 1;				// 256 bits (32 bytes) of random data
+}
+
+/**
+ * Request: Ask device to sign message (Decred variant)
+ * @next MessageSignature
+ * @next Failure
+ */
+message DecredSignMessage {
+	repeated uint32 address_n = 1;				// BIP-32 path to derive the key from master node
+	required bytes message = 2;				// message to be signed
+}
+
+/**
+ * Request: Ask device to verify message (Decred variant)
+ * @next Success
+ * @next Failure
+ */
+message DecredVerifyMessage {
+	optional string address = 1;				// address to verify
+	optional bytes signature = 2;				// signature to verify
+	optional bytes message = 3;				// message to verify
+}
+
+/**
+ * Request: Ask device to sign transaction (Decred variant)
+ * @next PassphraseRequest
+ * @next PinMatrixRequest
+ * @next DecredTxRequest
+ * @next Failure
+ */
+message DecredSignTx {
+	required uint32 outputs_count = 1;			// number of transaction outputs
+	required uint32 inputs_count = 2;			// number of transaction inputs
+	optional uint32 version = 4 [default=1];		// transaction version
+	optional uint32 lock_time = 5 [default=0];		// transaction lock_time
+}
+
+/**
+ * Response: Device asks for information for signing Decred transaction or returns the last result
+ * If request_index is set, device awaits TxAck message (with fields filled in according to request_type)
+ * If signature_index is set, 'signature' contains signed input of signature_index's input
+ * @prev DecredSignTx
+ * @prev DecredTxAck
+ */
+message DecredTxRequest {
+	optional RequestType request_type = 1;			// what should be filled in TxAck message?
+	optional TxRequestDetailsType details = 2;		// request for tx details
+	optional TxRequestSerializedType serialized = 3;	// serialized data and request for next
+}
+
+/**
+ * Request: Decred Reported transaction data
+ * @prev DecredTxRequest
+ * @next DecredTxRequest
+ */
+message DecredTxAck {
+	optional DecredTransactionType tx = 1;
+}
+
 /**
  * Request: Ask device to do initialization involving user interaction
  * @next EntropyRequest

protob/types.proto

@@ -267,3 +267,78 @@ message IdentityType {
 	optional string path = 5;			// path part of URI
 	optional uint32 index = 6 [default=0];		// identity index
 }
+
+
+/**
+ * Structure representing a decred data type that is used to track previous
+ * transaction outputs.
+ * @used_in DecredTxInType
+ */
+message DecredOutPointType {
+  required bytes hash = 1;
+  required uint64 index = 2;
+  optional bytes tree = 3;
+}
+
+/**
+ * Structure representing decred transaction input
+ * @used_in SimpleSignTx
+ * @used_in DecredTransactionType
+ */
+message DecredTxInType {
+  // Non-witness
+  required DecredOutPointType previous_out_point = 1;
+  required uint32 sequence = 2 [default=0xffffffff];
+
+  // Witness
+  required int64 value_in = 3;
+  required uint32 block_height = 4;
+  required uint32 block_index = 5;
+  required bytes signature_script = 6; // FIXME ATM this has a fixed size set in - should be dynamic length/pointer
+
+  required bytes prev_hash = 7;						// XXX remove me, I may not be needed
+  optional InputScriptType script_type = 8 [default=SPENDADDRESS];	// defines template of input script
+	optional MultisigRedeemScriptType multisig = 9;				// Filled if input is going to spend multisig tx
+	optional uint64 amount = 10;						// amount of previous transaction output (for segwit only)
+  repeated uint32 address_n = 11;						// BIP-32 path to derive the key from master node
+	required uint32 prev_index = 12;						// index of previous output to spend
+	optional bytes script_sig = 13;						// script signature, unset for tx to sign
+}
+
+/**
+ * Structure representing decred transaction output
+ * @used_in SimpleSignTx
+ * @used_in DecredTransactionType
+ */
+message DecredTxOutType {
+  required int64 value = 1;
+  required uint32 version = 2;
+  required bytes pk_script = 3; // FIXME ATM this has a fixed size set in - should be dynamic length/pointer
+
+  // XXX remove the below members
+  optional string address = 4;			// target coin address in Base58 encoding
+	repeated uint32 address_n = 5;			// BIP-32 path to derive the key from master node; has higher priority than "address"
+	required uint64 amount = 6;			// amount to spend in satoshis
+	required OutputScriptType script_type = 7;	// output script type
+	optional MultisigRedeemScriptType multisig = 8; // defines multisig address; script_type must be PAYTOMULTISIG
+	optional bytes op_return_data = 9;		// defines op_return data; script_type must be PAYTOOPRETURN, amount must be 0
+
+}
+
+/**
+ * Structure representing decred transaction
+ * @used_in DecredTxAck
+ */
+message DecredTransactionType {
+  optional int32 version = 1;
+	repeated DecredTxInType inputs = 2;
+	repeated TxOutputBinType bin_outputs = 3;
+  optional uint32 lock_time = 4;
+	repeated DecredTxOutType outputs = 5;
+	optional uint32 inputs_cnt = 6;
+	optional uint32 outputs_cnt = 7;
+  optional bytes extra_data = 8;
+	optional uint32 extra_data_len = 9;
+  required bytes cached_hash = 10;
+  optional uint32 expiry = 11;
+}