add support for 'close remainder to' field

CHANGELOG.md

@@ -1,3 +1,7 @@
 # 0.0.1
 ## Added
 - SDK released
+# 0.0.2
+## Added
+- Support for "genesis ID" field in transactions
+- Support for "close remainder to" field in transactions

README.md

@@ -405,7 +405,7 @@ func main() {
 
 	// Make transaction
 	genID := txParams.GenesisID
-	tx, err := transaction.MakePaymentTxn(fromAddr, toAddr, 1, 100, 300, 400, nil, genID)
+	tx, err := transaction.MakePaymentTxn(fromAddr, toAddr, 1, 100, 300, 400, nil, "", genID)
 	if err != nil {
 		fmt.Printf("Error creating transaction: %s\n", err)
 		return

crypto/crypto_test.go

@@ -21,7 +21,7 @@ func TestSignTransaction(t *testing.T) {
 	const toAddr = "PU7ZTZJ5GSXET2ZPIWDWDT2TQQEP7WXOGXDQ3ARUCZW6PK7D4ULSE6NYCE"
 
 	// Build the unsigned transaction
-	tx, err := transaction.MakePaymentTxn(fromAddr, toAddr, 1, 1234, 106575, 107575, nil)
+	tx, err := transaction.MakePaymentTxn(fromAddr, toAddr, 1, 1234, 106575, 107575, nil, "", "")
 	require.NoError(t, err)
 
 	// Decode the secret key for the sender

examples/gen-addresses/main.go

@@ -114,7 +114,7 @@ func main() {
 
 	// Sign a sample transaction using this library, *not* kmd
 	genID := txParams.GenesisID
-	tx, err := transaction.MakePaymentTxn(addresses[0], addresses[1], 1, 100, 300, 400, nil, genID)
+	tx, err := transaction.MakePaymentTxn(addresses[0], addresses[1], 1, 100, 300, 400, nil, "", genID)
 	if err != nil {
 		fmt.Printf("Error creating transaction: %s\n", err)
 		return

transaction/transaction.go

@@ -6,7 +6,7 @@ import (
 
 // MakePaymentTxn constructs a payment transaction using the passed parameters.
 // `from` and `to` addresses should be checksummed, human-readable addresses
-func MakePaymentTxn(from, to string, fee, amount, firstRound, lastRound uint64, note []byte, genesisID string) (tx types.Transaction, err error) {
+func MakePaymentTxn(from, to string, fee, amount, firstRound, lastRound uint64, note []byte, closeRemainderTo, genesisID string) (tx types.Transaction, err error) {
 	// Decode from address
 	fromAddr, err := types.DecodeAddress(from)
 	if err != nil {
@@ -19,6 +19,15 @@ func MakePaymentTxn(from, to string, fee, amount, firstRound, lastRound uint64,
 		return
 	}
 
+	// Decode the CloseRemainderTo address, if present
+	var closeRemainderToAddr types.Address
+	if closeRemainderTo != "" {
+		closeRemainderToAddr, err = types.DecodeAddress(closeRemainderTo)
+		if err != nil {
+			return
+		}
+	}
+
 	// Build the transaction
 	tx = types.Transaction{
 		Type: types.PaymentTx,
@@ -31,8 +40,9 @@ func MakePaymentTxn(from, to string, fee, amount, firstRound, lastRound uint64,
 			GenesisID:  genesisID,
 		},
 		PaymentTxnFields: types.PaymentTxnFields{
-			Receiver: toAddr,
-			Amount:   types.Algos(amount),
+			Receiver:         toAddr,
+			Amount:           types.Algos(amount),
+			CloseRemainderTo: closeRemainderToAddr,
 		},
 	}
 	return

types/transaction.go

@@ -39,6 +39,12 @@ type PaymentTxnFields struct {
 
 	Receiver Address `codec:"rcv"`
 	Amount   Algos   `codec:"amt"`
+
+	// When CloseRemainderTo is set, it indicates that the
+	// transaction is requesting that the account should be
+	// closed, and all remaining funds be transferred to this
+	// address.
+	CloseRemainderTo Address `codec:"close"`
 }
 
 // Header captures the fields common to every transaction type.