Add version and locktime setters

src/psbt.js

@@ -14,9 +14,9 @@ class Psbt extends bip174_1.Psbt {
   constructor(opts = {}) {
     super();
     // set defaults
-    this.setVersion(2);
     this.opts = Object.assign({}, DEFAULT_OPTS, opts);
     this.__TX = transaction_1.Transaction.fromBuffer(this.globalMap.unsignedTx);
+    this.setVersion(2);
     // set cache
     const self = this;
     delete this.globalMap.unsignedTx;
@@ -44,6 +44,16 @@ class Psbt extends bip174_1.Psbt {
     dpew(this, '__TX_BUF_CACHE', false, true);
     dpew(this, 'opts', false, true);
   }
+  setVersion(version) {
+    this.__TX.version = version;
+    this.__TX_BUF_CACHE = undefined;
+    return this;
+  }
+  setLocktime(locktime) {
+    this.__TX.locktime = locktime;
+    this.__TX_BUF_CACHE = undefined;
+    return this;
+  }
   addInput(inputData) {
     const self = this;
     const inputAdder = (_inputData, txBuf) => {

ts_src/psbt.ts

@@ -23,9 +23,9 @@ export class Psbt extends PsbtBase {
   constructor(opts: PsbtOptsOptional = {}) {
     super();
     // set defaults
-    this.setVersion(2);
     this.opts = Object.assign({}, DEFAULT_OPTS, opts);
     this.__TX = Transaction.fromBuffer(this.globalMap.unsignedTx!);
+    this.setVersion(2);
 
     // set cache
     const self = this;
@@ -61,6 +61,18 @@ export class Psbt extends PsbtBase {
     dpew(this, 'opts', false, true);
   }
 
+  setVersion(version: number): this {
+    this.__TX.version = version;
+    this.__TX_BUF_CACHE = undefined;
+    return this;
+  }
+
+  setLocktime(locktime: number): this {
+    this.__TX.locktime = locktime;
+    this.__TX_BUF_CACHE = undefined;
+    return this;
+  }
+
   addInput(inputData: TransactionInput): this {
     const self = this;
     const inputAdder = (

types/psbt.d.ts

@@ -8,6 +8,8 @@ export declare class Psbt extends PsbtBase {
     private __TX_BUF_CACHE?;
     private opts;
     constructor(opts?: PsbtOptsOptional);
+    setVersion(version: number): this;
+    setLocktime(locktime: number): this;
     addInput(inputData: TransactionInput): this;
     addOutput(outputData: TransactionOutput): this;
     extractTransaction(): Transaction;