rpcclient: Add GetTransactionWatchOnly method

rpcclient/wallet.go

@@ -20,7 +20,8 @@ import (
 // *****************************
 
 // FutureGetTransactionResult is a future promise to deliver the result
-// of a GetTransactionAsync RPC invocation (or an applicable error).
+// of a GetTransactionAsync or GetTransactionWatchOnlyAsync RPC invocation
+// (or an applicable error).
 type FutureGetTransactionResult chan *response
 
 // Receive waits for the response promised by the future and returns detailed
@@ -63,6 +64,28 @@ func (c *Client) GetTransaction(txHash *chainhash.Hash) (*btcjson.GetTransaction
 	return c.GetTransactionAsync(txHash).Receive()
 }
 
+// GetTransactionWatchOnlyAsync returns an instance of a type that can be used
+// to get the result of the RPC at some future time by invoking the Receive function on
+// the returned instance.
+//
+// See GetTransactionWatchOnly for the blocking version and more details.
+func (c *Client) GetTransactionWatchOnlyAsync(txHash *chainhash.Hash, watchOnly bool) FutureGetTransactionResult {
+	hash := ""
+	if txHash != nil {
+		hash = txHash.String()
+	}
+
+	cmd := btcjson.NewGetTransactionCmd(hash, &watchOnly)
+	return c.sendCmd(cmd)
+}
+
+// GetTransactionWatchOnly returns detailed information about a wallet
+// transaction, and allow including watch-only addresses in balance
+// calculation and details.
+func (c *Client) GetTransactionWatchOnly(txHash *chainhash.Hash, watchOnly bool) (*btcjson.GetTransactionResult, error) {
+	return c.GetTransactionWatchOnlyAsync(txHash, watchOnly).Receive()
+}
+
 // FutureListTransactionsResult is a future promise to deliver the result of a
 // ListTransactionsAsync, ListTransactionsCountAsync, or
 // ListTransactionsCountFromAsync RPC invocation (or an applicable error).