diff --git a/proto/tendermint/store/types.proto b/proto/tendermint/store/types.proto
index 54c5143c69..843667455b 100644
--- a/proto/tendermint/store/types.proto
+++ b/proto/tendermint/store/types.proto
@@ -12,8 +12,8 @@ message BlockStoreState {
 // as well as the result of executing the transaction.
 message TxInfo {
   int64 height    = 1;
-  uint32 index     = 2;
+  uint32 index    = 2;
   // The response code of executing the tx. 0 means
   // successfully executed, all others are error codes.
-  uint32 code = 3;
+  uint32 code     = 3;
 }
diff --git a/rpc/core/types/responses.go b/rpc/core/types/responses.go
index f072aa9779..c5b858cfc1 100644
--- a/rpc/core/types/responses.go
+++ b/rpc/core/types/responses.go
@@ -60,8 +60,8 @@ type ResultCommit struct {
 	CanonicalCommit    bool `json:"canonical"`
 }
 
-// ResultTxStatus contains info to locate a tx in a committed block.
-// TODO: nina update godoc
+// ResultTxStatus represents the status of a transaction during its life cycle.
+// It contains info to locate a tx in a committed block as well as its execution code and status.
 type ResultTxStatus struct {
 	Height        int64  `json:"height"`
 	Index         uint32 `json:"index"`
diff --git a/store/store.go b/store/store.go
index fb27f5c196..df06c64212 100644
--- a/store/store.go
+++ b/store/store.go
@@ -450,8 +450,7 @@ func (bs *BlockStore) SaveSeenCommit(height int64, seenCommit *types.Commit) err
 	return bs.db.Set(calcSeenCommitKey(height), seenCommitBytes)
 }
 
-// SaveTxInfo gets Tx hashes from the block converts them to TxInfo and persists them to the db.
-// TODO: nina: update godoc here
+// SaveTxInfo indexes the txs from the block with the given response codes during execution.
 func (bs *BlockStore) SaveTxInfo(block *types.Block, txResponseCodes []uint32) error {
 	if len(txResponseCodes) != len(block.Txs) {
 		return fmt.Errorf("txResponseCodes length mismatch with block txs length")