Some type fixes and js build

src/index.js

@@ -1,7 +1,6 @@
 'use strict';
 Object.defineProperty(exports, '__esModule', { value: true });
 const bitcoinjs_lib_1 = require('bitcoinjs-lib');
-const bitcoinjs_lib_2 = require('bitcoinjs-lib');
 async function requestPayjoinWithCustomRemoteCall(psbt, remoteCall) {
   const clonedPsbt = psbt.clone();
   clonedPsbt.finalizeAllInputs();
@@ -15,12 +14,6 @@ async function requestPayjoinWithCustomRemoteCall(psbt, remoteCall) {
   delete clonedPsbt.data.globalMap.globalXpub;
   const payjoinPsbt = await remoteCall(clonedPsbt);
   if (!payjoinPsbt) throw new Error("We did not get the receiver's PSBT");
-  // no inputs were added?
-  if (clonedPsbt.inputCount <= payjoinPsbt.inputCount) {
-    throw new Error(
-      "There were less inputs than before in the receiver's PSBT",
-    );
-  }
   if (
     payjoinPsbt.data.globalMap.globalXpub &&
     payjoinPsbt.data.globalMap.globalXpub.length > 0
@@ -62,7 +55,7 @@ async function requestPayjoinWithCustomRemoteCall(psbt, remoteCall) {
           // Can we assume output will contain redeemScript and witnessScript?
           // If so, we could decompile scriptPubkey, RS, and WS, and search for
           // the pubkey and its hash160.
-          bitcoinjs_lib_2.payments.p2wpkh({
+          bitcoinjs_lib_1.payments.p2wpkh({
             pubkey: originalOutput.bip32Derivation[0].pubkey,
           }).output,
         )
@@ -70,8 +63,18 @@ async function requestPayjoinWithCustomRemoteCall(psbt, remoteCall) {
         payjoinPsbt.updateOutput(index, originalOutput);
     });
   }
-  // TODO: check payjoinPsbt.version == psbt.version
-  // TODO: check payjoinPsbt.locktime == psbt.locktime
+  if (
+    getGlobalTransaction(payjoinPsbt).version !==
+    getGlobalTransaction(psbt).version
+  ) {
+    throw new Error('The version field of the transaction has been modified');
+  }
+  if (
+    getGlobalTransaction(payjoinPsbt).locktime !==
+    getGlobalTransaction(psbt).locktime
+  ) {
+    throw new Error('The LockTime field of the transaction has been modified');
+  }
   // TODO: check payjoinPsbt.inputs where input belongs to us, that it is not finalized
   // TODO: check payjoinPsbt.inputs where input belongs to us, that it is was included in psbt.inputs
   // TODO: check payjoinPsbt.inputs where input belongs to us, that its sequence has not changed from that of psbt.inputs

ts_src/index.ts

@@ -1,4 +1,4 @@
-import { Psbt, Transaction, payments } from 'bitcoinjs-lib';
+import { payments, Psbt, Transaction, TxInput } from 'bitcoinjs-lib';
 import {
   Bip32Derivation,
   GlobalXpub,
@@ -6,13 +6,6 @@ import {
 } from 'bip174/src/lib/interfaces';
 
 type Nullable<T> = T | null;
-interface TxInput {
-  hash: Buffer;
-  index: number;
-  script: Buffer;
-  sequence: number;
-  witness: Buffer[];
-}
 
 export async function requestPayjoinWithCustomRemoteCall(
   psbt: Psbt,
@@ -33,7 +26,6 @@ export async function requestPayjoinWithCustomRemoteCall(
   const payjoinPsbt = await remoteCall(clonedPsbt);
   if (!payjoinPsbt) throw new Error("We did not get the receiver's PSBT");
 
-
   if (
     payjoinPsbt.data.globalMap.globalXpub &&
     (payjoinPsbt.data.globalMap.globalXpub as GlobalXpub[]).length > 0
@@ -87,10 +79,16 @@ export async function requestPayjoinWithCustomRemoteCall(
     });
   }
 
-  if (getGlobalTransaction(payjoinPsbt).version !== getGlobalTransaction(psbt).version) {
+  if (
+    getGlobalTransaction(payjoinPsbt).version !==
+    getGlobalTransaction(psbt).version
+  ) {
     throw new Error('The version field of the transaction has been modified');
   }
-  if (getGlobalTransaction(payjoinPsbt).locktime !== getGlobalTransaction(psbt).locktime) {
+  if (
+    getGlobalTransaction(payjoinPsbt).locktime !==
+    getGlobalTransaction(psbt).locktime
+  ) {
     throw new Error('The LockTime field of the transaction has been modified');
   }
   // TODO: check payjoinPsbt.inputs where input belongs to us, that it is not finalized