feat: allow setting explicit fee payer for transaction (#13129)

web3.js/test/transaction.test.js

@@ -86,19 +86,22 @@ describe('compileMessage', () => {
 
     expect(() => {
       transaction.compileMessage();
-    }).toThrow('Transaction feePayer required');
-
-    transaction.setSigners(payer.publicKey);
-
-    expect(() => {
-      transaction.compileMessage();
-    }).toThrow('missing signer');
+    }).toThrow('Transaction fee payer required');
 
     transaction.setSigners(payer.publicKey, new Account().publicKey);
 
     expect(() => {
       transaction.compileMessage();
     }).toThrow('unknown signer');
+
+    // Expect compile to succeed with implicit fee payer from signers
+    transaction.setSigners(payer.publicKey);
+    transaction.compileMessage();
+
+    // Expect compile to succeed with fee payer and no signers
+    transaction.signatures = [];
+    transaction.feePayer = payer.publicKey;
+    transaction.compileMessage();
   });
 
   test('payer is writable', () => {
@@ -260,6 +263,7 @@ test('transfer signatures', () => {
 
   const newTransaction = new Transaction({
     recentBlockhash: orgTransaction.recentBlockhash,
+    feePayer: orgTransaction.feePayer,
     signatures: orgTransaction.signatures,
   }).add(transfer1, transfer2);
 
@@ -354,7 +358,10 @@ test('parse wire format and serialize', () => {
     toPubkey: recipient,
     lamports: 49,
   });
-  const expectedTransaction = new Transaction({recentBlockhash}).add(transfer);
+  const expectedTransaction = new Transaction({
+    recentBlockhash,
+    feePayer: sender.publicKey,
+  }).add(transfer);
   expectedTransaction.sign(sender);
 
   const wireTransaction = Buffer.from(
@@ -423,21 +430,38 @@ test('serialize unsigned transaction', () => {
   expect(expectedTransaction.signatures.length).toBe(0);
   expect(() => {
     expectedTransaction.serialize();
-  }).toThrow(Error);
+  }).toThrow('Transaction fee payer required');
   expect(() => {
     expectedTransaction.serialize({verifySignatures: false});
-  }).toThrow(Error);
+  }).toThrow('Transaction fee payer required');
   expect(() => {
     expectedTransaction.serializeMessage();
-  }).toThrow('Transaction feePayer required');
+  }).toThrow('Transaction fee payer required');
 
+  expectedTransaction.feePayer = sender.publicKey;
+
+  // Transactions with missing signatures will fail sigverify.
+  expect(() => {
+    expectedTransaction.serialize();
+  }).toThrow('Signature verification failed');
+
+  // Serializing without signatures is allowed if sigverify disabled.
+  expectedTransaction.serialize({verifySignatures: false});
+
+  // Serializing the message is allowed when signature array has null signatures
+  expectedTransaction.serializeMessage();
+
+  expectedTransaction.feePayer = null;
   expectedTransaction.setSigners(sender.publicKey);
   expect(expectedTransaction.signatures.length).toBe(1);
 
-  // Signature array populated with null signatures fails.
+  // Transactions with missing signatures will fail sigverify.
   expect(() => {
     expectedTransaction.serialize();
-  }).toThrow(Error);
+  }).toThrow('Signature verification failed');
+
+  // Serializing without signatures is allowed if sigverify disabled.
+  expectedTransaction.serialize({verifySignatures: false});
 
   // Serializing the message is allowed when signature array has null signatures
   expectedTransaction.serializeMessage();
@@ -468,7 +492,7 @@ test('serialize unsigned transaction', () => {
   expect(expectedTransaction.signatures.length).toBe(1);
 });
 
-test('externally signed stake delegate', () => {
+test('deprecated - externally signed stake delegate', () => {
   const from_keypair = nacl.sign.keyPair.fromSeed(
     Uint8Array.from(Array(32).fill(1)),
   );
@@ -489,3 +513,25 @@ test('externally signed stake delegate', () => {
   tx.addSignature(from.publicKey, signature);
   expect(tx.verifySignatures()).toBe(true);
 });
+
+test('externally signed stake delegate', () => {
+  const from_keypair = nacl.sign.keyPair.fromSeed(
+    Uint8Array.from(Array(32).fill(1)),
+  );
+  const authority = new Account(Buffer.from(from_keypair.secretKey));
+  const stake = new PublicKey(2);
+  const recentBlockhash = new PublicKey(3).toBuffer();
+  const vote = new PublicKey(4);
+  var tx = StakeProgram.delegate({
+    stakePubkey: stake,
+    authorizedPubkey: authority.publicKey,
+    votePubkey: vote,
+  });
+  const from = authority;
+  tx.recentBlockhash = bs58.encode(recentBlockhash);
+  tx.feePayer = from.publicKey;
+  const tx_bytes = tx.serializeMessage();
+  const signature = nacl.sign.detached(tx_bytes, from.secretKey);
+  tx.addSignature(from.publicKey, signature);
+  expect(tx.verifySignatures()).toBe(true);
+});