From 2cfc78d78fda7bbe990fd9cb44060d3e7570a5b2 Mon Sep 17 00:00:00 2001
From: Nesopie <aymanshaik1015@gmail.com>
Date: Mon, 25 Mar 2024 12:51:14 +0530
Subject: [PATCH] fix: coinbase serialization

---
 .gitignore                                | 3 ++-
 output.txt                                | 4 ++--
 src/features/block/coinbaseTransaction.ts | 2 +-
 src/features/encoding/serializer.ts       | 6 +-----
 src/index.ts                              | 5 +++++
 5 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/.gitignore b/.gitignore
index 40b878d..8dd884b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-node_modules/
\ No newline at end of file
+node_modules/
+output.txt
\ No newline at end of file
diff --git a/output.txt b/output.txt
index 72b9472..a18ad39 100644
--- a/output.txt
+++ b/output.txt
@@ -1,5 +1,5 @@
-040000000000ffff00000000000000000000000000000000000000000000000000000000644fbf96c3029092bc313552afed1d20bf61e3e874ff09ec696496a1dd2d0e2854220166ffff001f68450000
-00000000010000000000000000000000000000000000000000000000000000000000000000ffffffff040323370800000000028651da4d000000001976a914edf10a7fac6b32e24daa5305c723f3de58db1bc888ac0000000000000000266a24aa21a9edf600a0667d8eef335e2f4cd9eaf746ce287bb6f62e9b0ef94869c65420a959a100000000
+040000000000ffff00000000000000000000000000000000000000000000000000000000644fbf96c3029092bc313552afed1d20bf61e3e874ff09ec696496a1dd2d0e28c5250166ffff001f8e190000
+000000000001010000000000000000000000000000000000000000000000000000000000000000ffffffff040323370800000000028651da4d000000001976a914edf10a7fac6b32e24daa5305c723f3de58db1bc888ac0000000000000000266a24aa21a9edf600a0667d8eef335e2f4cd9eaf746ce287bb6f62e9b0ef94869c65420a959a10120000000000000000000000000000000000000000000000000000000000000000000000000
 66de1e6c0437305764ab5ba0104bb5bdb6dc4a48b83323aeff155d2684cabccc
 a9f1f2279711f476c30e2e1382a0e99358c662a48fbd1774d7e5e7f8ea27d98d
 b9ea7324bf46de83ff81f0876dd8e6e8485318165cf9c5073549dd8824c7c2d3
diff --git a/src/features/block/coinbaseTransaction.ts b/src/features/block/coinbaseTransaction.ts
index e9c5310..d163c4a 100644
--- a/src/features/block/coinbaseTransaction.ts
+++ b/src/features/block/coinbaseTransaction.ts
@@ -17,7 +17,7 @@ const coinbaseTemplate = {
       prevout: null,
       scriptsig: "03233708",
       scriptsig_asm: "OP_PUSHBYTES_3 233708",
-      witness: [Buffer.from(ZEROS, "hex")],
+      witness: [ZEROS],
     },
   ],
   vout: [
diff --git a/src/features/encoding/serializer.ts b/src/features/encoding/serializer.ts
index 0fa573b..700993b 100644
--- a/src/features/encoding/serializer.ts
+++ b/src/features/encoding/serializer.ts
@@ -93,11 +93,7 @@ export const txSerializer = (tx: Transaction) => {
 
   return {
     serializedTx,
-    serializedWTx: isWitness
-      ? tx.vin[0].txid === ZEROS
-        ? ZEROS
-        : serializedWTx
-      : serializedTx,
+    serializedWTx: isWitness ? serializedWTx : serializedTx,
   };
 };
 
diff --git a/src/index.ts b/src/index.ts
index c8fa77f..0c4b22e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -9,6 +9,7 @@ import { txSerializer, txWeight } from "./features/encoding/serializer";
 import { feePerByte } from "./features/block/fee";
 import { mine } from "./features/block/mine";
 import * as path from "path";
+import * as bitcoin from "bitcoinjs-lib";
 
 (async () => {
   const files = fs.readdirSync("./mempool");
@@ -38,6 +39,10 @@ import * as path from "path";
 
   const { serializedBlock, blockHash, coinbaseTransaction } = mine(txs);
 
+  const ct = bitcoin.Transaction.fromHex(
+    txSerializer(coinbaseTransaction).serializedWTx
+  );
+
   fs.writeFileSync(outputFile, serializedBlock);
   fs.appendFileSync(outputFile, "\n");
   fs.appendFileSync(