From 25fcfa5c6289277910b9cffbdf40fc4e74af94c9 Mon Sep 17 00:00:00 2001
From: nakul1010 <nakul.amate@gmail.com>
Date: Tue, 13 Aug 2024 18:07:29 +0530
Subject: [PATCH] fix: return serialized signed transaction

---
 docs/docs/build/bob-sdk/gateway.md | 10 ++++++----
 sdk/examples/gateway.ts            |  9 +++++----
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/docs/docs/build/bob-sdk/gateway.md b/docs/docs/build/bob-sdk/gateway.md
index 20d5067e..d34d1292 100644
--- a/docs/docs/build/bob-sdk/gateway.md
+++ b/docs/docs/build/bob-sdk/gateway.md
@@ -94,8 +94,7 @@ We recommend using our [sats-wagmi](./sats-wagmi.md) package to query your user'
 ```ts title="/src/utils/gateway.ts"
 import { createTransfer } from "@gobob/bob-sdk";
 import { AddressType, getAddressInfo } from "bitcoin-address-validation";
-import { hex, base64 } from "@scure/base";
-import { Transaction as SigTx } from "@scure/btc-signer";
+import { Transaction } from '@scure/btc-signer';
 
 const tx = await createTxWithOpReturn(
   fromAddress,
@@ -110,7 +109,7 @@ async function createTxWithOpReturn(
   amount: number,
   opReturn: string,
   fromPubKey?: string
-): Promise<base64> {
+): Promise<Buffer> {
   const addressType = getAddressInfo(fromAddress).type;
 
   // Ensure this is not the P2TR address for ordinals (we don't want to spend from it)
@@ -139,7 +138,10 @@ async function createTxWithOpReturn(
     opReturn
   );
   const psbt = unsignedTx.toPSBT(0);
-  return base64.encode(psbt)
+
+  const signedTx = Transaction.fromPSBT(psbt);
+
+  return Buffer.from(signedTx.extract())
 }
 ```
 
diff --git a/sdk/examples/gateway.ts b/sdk/examples/gateway.ts
index 2ec1fad7..0941a352 100644
--- a/sdk/examples/gateway.ts
+++ b/sdk/examples/gateway.ts
@@ -1,8 +1,7 @@
 import { GatewayApiClient } from "../src/gateway";
 import { AddressType, getAddressInfo } from "bitcoin-address-validation";
 import { createTransfer } from "../src/wallet/utxo";
-import { hex, base64 } from '@scure/base';
-import { Transaction as SigTx } from '@scure/btc-signer';
+import { Transaction } from '@scure/btc-signer';
 
 const BOB_TBTC_V2_TOKEN_ADDRESS = "0xBBa2eF945D523C4e2608C9E1214C2Cc64D4fc2e2";
 
@@ -24,7 +23,7 @@ export async function swapBtcForToken(evmAddress: string) {
 
 }
 
-async function createTxWithOpReturn(fromAddress: string, toAddress: string, amount: number, opReturn: string, fromPubKey?: string): Promise<base64> {
+async function createTxWithOpReturn(fromAddress: string, toAddress: string, amount: number, opReturn: string, fromPubKey?: string): Promise<Buffer> {
     const addressType = getAddressInfo(fromAddress).type;
 
     // Ensure this is not the P2TR address for ordinals (we don't want to spend from it)
@@ -51,5 +50,7 @@ async function createTxWithOpReturn(fromAddress: string, toAddress: string, amou
 
     const psbt = unsignedTx.toPSBT(0);
 
-    return base64.encode(psbt)
+    const signedTx = Transaction.fromPSBT(psbt);
+
+    return Buffer.from(signedTx.extract())
 }