Merge pull request #1933 from yaslama/transactions-addresses

Add addresses to transactions returned by SubscribeTransactions

lnwallet/btcwallet/btcwallet.go

@@ -556,6 +556,7 @@ func minedTransactionsToDetails(
 // for an unconfirmed transaction to a transaction detail.
 func unminedTransactionsToDetail(
 	summary base.TransactionSummary,
+	chainParams *chaincfg.Params,
 ) (*lnwallet.TransactionDetail, error) {
 
 	wireTx := &wire.MsgTx{}
@@ -565,10 +566,22 @@ func unminedTransactionsToDetail(
 		return nil, err
 	}
 
+	var destAddresses []btcutil.Address
+	for _, txOut := range wireTx.TxOut {
+		_, outAddresses, _, err :=
+			txscript.ExtractPkScriptAddrs(txOut.PkScript, chainParams)
+		if err != nil {
+			return nil, err
+		}
+
+		destAddresses = append(destAddresses, outAddresses...)
+	}
+
 	txDetail := &lnwallet.TransactionDetail{
 		Hash:          *summary.Hash,
 		TotalFees:     int64(summary.Fee),
 		Timestamp:     summary.Timestamp,
+		DestAddresses: destAddresses,
 		RawTx:         summary.Transaction,
 	}
 
@@ -618,7 +631,7 @@ func (b *BtcWallet) ListTransactionDetails() ([]*lnwallet.TransactionDetail, err
 		txDetails = append(txDetails, details...)
 	}
 	for _, tx := range txns.UnminedTransactions {
-		detail, err := unminedTransactionsToDetail(tx)
+		detail, err := unminedTransactionsToDetail(tx, b.netParams)
 		if err != nil {
 			return nil, err
 		}
@@ -705,7 +718,9 @@ out:
 			// notifications for any newly unconfirmed transactions.
 			go func() {
 				for _, tx := range txNtfn.UnminedTransactions {
-					detail, err := unminedTransactionsToDetail(tx)
+					detail, err := unminedTransactionsToDetail(
+						tx, t.w.ChainParams(),
+					)
 					if err != nil {
 						continue
 					}

lnwallet/interface_test.go

@@ -1181,9 +1181,11 @@ func testListTransactionDetails(miner *rpctest.Harness,
 
 	// Next create a transaction paying to an output which isn't under the
 	// wallet's control.
-	b := txscript.NewScriptBuilder()
-	b.AddOp(txscript.OP_0)
-	outputScript, err := b.Script()
+	minerAddr, err := miner.NewAddress()
+	if err != nil {
+		t.Fatalf("unable to generate address: %v", err)
+	}
+	outputScript, err := txscript.PayToAddrScript(minerAddr)
 	if err != nil {
 		t.Fatalf("unable to make output script: %v", err)
 	}
@@ -1227,6 +1229,20 @@ func testListTransactionDetails(miner *rpctest.Harness,
 			t.Fatalf("num confs incorrect, got %v expected %v",
 				txDetail.NumConfirmations, 0)
 		}
+
+		// We test that each txDetail has destination addresses. This ensures
+		// that even when we have 0 confirmation transactions, the destination
+		// addresses are returned.
+		var match bool
+		for _, addr := range txDetail.DestAddresses {
+			if addr.String() == minerAddr.String() {
+				match = true
+				break
+			}
+		}
+		if !match {
+			t.Fatalf("minerAddr: %v should have been a dest addr", minerAddr)
+		}
 	}
 	if !mempoolTxFound {
 		t.Fatalf("unable to find mempool tx in tx details!")

rpcserver.go

@@ -3576,6 +3576,10 @@ func (r *rpcServer) SubscribeTransactions(req *lnrpc.GetTransactionsRequest,
 	for {
 		select {
 		case tx := <-txClient.ConfirmedTransactions():
+			destAddresses := make([]string, 0, len(tx.DestAddresses))
+			for _, destAddress := range tx.DestAddresses {
+				destAddresses = append(destAddresses, destAddress.EncodeAddress())
+			}
 			detail := &lnrpc.Transaction{
 				TxHash:           tx.Hash.String(),
 				Amount:           int64(tx.Value),
@@ -3583,6 +3587,7 @@ func (r *rpcServer) SubscribeTransactions(req *lnrpc.GetTransactionsRequest,
 				BlockHash:        tx.BlockHash.String(),
 				TimeStamp:        tx.Timestamp,
 				TotalFees:        tx.TotalFees,
+				DestAddresses:    destAddresses,
 				RawTxHex:         hex.EncodeToString(tx.RawTx),
 			}
 			if err := updateStream.Send(detail); err != nil {
@@ -3590,11 +3595,16 @@ func (r *rpcServer) SubscribeTransactions(req *lnrpc.GetTransactionsRequest,
 			}
 
 		case tx := <-txClient.UnconfirmedTransactions():
+			var destAddresses []string
+			for _, destAddress := range tx.DestAddresses {
+				destAddresses = append(destAddresses, destAddress.EncodeAddress())
+			}
 			detail := &lnrpc.Transaction{
 				TxHash:        tx.Hash.String(),
 				Amount:        int64(tx.Value),
 				TimeStamp:     tx.Timestamp,
 				TotalFees:     tx.TotalFees,
+				DestAddresses: destAddresses,
 				RawTxHex:      hex.EncodeToString(tx.RawTx),
 			}
 			if err := updateStream.Send(detail); err != nil {