Merge #8384: Add witness data output to TxInError messages

6e9e026 Expand signrawtransaction.py to cover error witness checking (Gregory Sanders)
9f7341b Add witness data output to TxInError messages (Gregory Sanders)

Tree-SHA512: 6f2a758544fa2657f3a57051bdb80fb14cb10501c8ef4ccbab7a62d4b6a823e74f40991c8796248865def24619b620b859dc2bb08dc2cc72511c1cf3897ab1a9

Author: sipa

src/rpc/rawtransaction.cpp

@@ -523,6 +523,11 @@ static void TxInErrorToJSON(const CTxIn& txin, UniValue& vErrorsRet, const std::
     UniValue entry(UniValue::VOBJ);
     entry.push_back(Pair("txid", txin.prevout.hash.ToString()));
     entry.push_back(Pair("vout", (uint64_t)txin.prevout.n));
+    UniValue witness(UniValue::VARR);
+    for (unsigned int i = 0; i < txin.scriptWitness.stack.size(); i++) {
+        witness.push_back(HexStr(txin.scriptWitness.stack[i].begin(), txin.scriptWitness.stack[i].end()));
+    }
+    entry.push_back(Pair("witness", witness));
     entry.push_back(Pair("scriptSig", HexStr(txin.scriptSig.begin(), txin.scriptSig.end())));
     entry.push_back(Pair("sequence", (uint64_t)txin.nSequence));
     entry.push_back(Pair("error", strMessage));

test/functional/signrawtransactions.py

@@ -114,6 +114,7 @@ def script_verification_error_test(self):
         # 5) Script verification errors have certain properties
         assert 'txid' in rawTxSigned['errors'][0]
         assert 'vout' in rawTxSigned['errors'][0]
+        assert 'witness' in rawTxSigned['errors'][0]
         assert 'scriptSig' in rawTxSigned['errors'][0]
         assert 'sequence' in rawTxSigned['errors'][0]
         assert 'error' in rawTxSigned['errors'][0]
@@ -123,6 +124,32 @@ def script_verification_error_test(self):
         assert_equal(rawTxSigned['errors'][0]['vout'], inputs[1]['vout'])
         assert_equal(rawTxSigned['errors'][1]['txid'], inputs[2]['txid'])
         assert_equal(rawTxSigned['errors'][1]['vout'], inputs[2]['vout'])
+        assert not rawTxSigned['errors'][0]['witness']
+
+        # Now test signing failure for transaction with input witnesses
+        p2wpkh_raw_tx = "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"
+
+        rawTxSigned = self.nodes[0].signrawtransaction(p2wpkh_raw_tx)
+
+        # 7) The transaction has no complete set of signatures
+        assert 'complete' in rawTxSigned
+        assert_equal(rawTxSigned['complete'], False)
+
+        # 8) Two script verification errors occurred
+        assert 'errors' in rawTxSigned
+        assert_equal(len(rawTxSigned['errors']), 2)
+
+        # 9) Script verification errors have certain properties
+        assert 'txid' in rawTxSigned['errors'][0]
+        assert 'vout' in rawTxSigned['errors'][0]
+        assert 'witness' in rawTxSigned['errors'][0]
+        assert 'scriptSig' in rawTxSigned['errors'][0]
+        assert 'sequence' in rawTxSigned['errors'][0]
+        assert 'error' in rawTxSigned['errors'][0]
+
+        # Non-empty witness checked here
+        assert_equal(rawTxSigned['errors'][1]['witness'], ["304402203609e17b84f6a7d30c80bfa610b5b4542f32a8a0d5447a12fb1366d7f01cc44a0220573a954c4518331561406f90300e8f3358f51928d43c212a8caed02de67eebee01", "025476c2e83188368da1ff3e292e7acafcdb3566bb0ad253f62fc70f07aeee6357"])
+        assert not rawTxSigned['errors'][0]['witness']
 
     def run_test(self):
         self.successful_signing_test()