Merge #9738: gettxoutproof() should return consistent result

6294f32 gettxoutproof() should return consistent result (John Newbery)

Tree-SHA512: 1c36f78ea07a3bdde09e9494207b4372d54bcd94ed2d56e339e78281f6693e26a93e4c3123453d5c0f6e994d0069d5a1c806786c4af71864f87ea4841611c379

Author: laanwj

src/rpc/rawtransaction.cpp

@@ -218,9 +218,13 @@ UniValue gettxoutproof(const JSONRPCRequest& request)
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
         pblockindex = mapBlockIndex[hashBlock];
     } else {
-        const Coin& coin = AccessByTxid(*pcoinsTip, oneTxid);
-        if (!coin.IsSpent() && coin.nHeight > 0 && coin.nHeight <= chainActive.Height()) {
-            pblockindex = chainActive[coin.nHeight];
+        // Loop through txids and try to find which block they're in. Exit loop once a block is found.
+        for (const auto& tx : setTxids) {
+            const Coin& coin = AccessByTxid(*pcoinsTip, tx);
+            if (!coin.IsSpent()) {
+                pblockindex = chainActive[coin.nHeight];
+                break;
+            }
         }
     }
 
@@ -243,7 +247,7 @@ UniValue gettxoutproof(const JSONRPCRequest& request)
         if (setTxids.count(tx->GetHash()))
             ntxFound++;
     if (ntxFound != setTxids.size())
-        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "(Not all) transactions not found in specified block");
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Not all transactions found in specified or retrieved block");
 
     CDataStream ssMB(SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
     CMerkleBlock mb(block, setTxids);

test/functional/merkle_blocks.py

@@ -39,7 +39,8 @@ def run_test(self):
         txid1 = self.nodes[0].sendrawtransaction(self.nodes[0].signrawtransaction(tx1)["hex"])
         tx2 = self.nodes[0].createrawtransaction([node0utxos.pop()], {self.nodes[1].getnewaddress(): 49.99})
         txid2 = self.nodes[0].sendrawtransaction(self.nodes[0].signrawtransaction(tx2)["hex"])
-        assert_raises(JSONRPCException, self.nodes[0].gettxoutproof, [txid1])
+        # This will raise an exception because the transaction is not yet in a block
+        assert_raises_jsonrpc(-5, "Transaction not yet in block", self.nodes[0].gettxoutproof, [txid1])
 
         self.nodes[0].generate(1)
         blockhash = self.nodes[0].getblockhash(chain_height + 1)
@@ -56,25 +57,29 @@ def run_test(self):
 
         txin_spent = self.nodes[1].listunspent(1).pop()
         tx3 = self.nodes[1].createrawtransaction([txin_spent], {self.nodes[0].getnewaddress(): 49.98})
-        self.nodes[0].sendrawtransaction(self.nodes[1].signrawtransaction(tx3)["hex"])
+        txid3 = self.nodes[0].sendrawtransaction(self.nodes[1].signrawtransaction(tx3)["hex"])
         self.nodes[0].generate(1)
         self.sync_all()
 
         txid_spent = txin_spent["txid"]
         txid_unspent = txid1 if txin_spent["txid"] != txid1 else txid2
 
         # We can't find the block from a fully-spent tx
-        assert_raises(JSONRPCException, self.nodes[2].gettxoutproof, [txid_spent])
-        # ...but we can if we specify the block
+        assert_raises_jsonrpc(-5, "Transaction not yet in block", self.nodes[2].gettxoutproof, [txid_spent])
+        # We can get the proof if we specify the block
         assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid_spent], blockhash)), [txid_spent])
-        # ...or if the first tx is not fully-spent
+        # We can't get the proof if we specify a non-existent block
+        assert_raises_jsonrpc(-5, "Block not found", self.nodes[2].gettxoutproof, [txid_spent], "00000000000000000000000000000000")
+        # We can get the proof if the transaction is unspent
         assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid_unspent])), [txid_unspent])
-        try:
-            assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1, txid2])), txlist)
-        except JSONRPCException:
-            assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid2, txid1])), txlist)
-        # ...or if we have a -txindex
+        # We can get the proof if we provide a list of transactions and one of them is unspent. The ordering of the list should not matter.
+        assert_equal(sorted(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1, txid2]))), sorted(txlist))
+        assert_equal(sorted(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid2, txid1]))), sorted(txlist))
+        # We can always get a proof if we have a -txindex
         assert_equal(self.nodes[2].verifytxoutproof(self.nodes[3].gettxoutproof([txid_spent])), [txid_spent])
+        # We can't get a proof if we specify transactions from different blocks
+        assert_raises_jsonrpc(-5, "Not all transactions found in specified or retrieved block", self.nodes[2].gettxoutproof, [txid1, txid3])
+
 
 if __name__ == '__main__':
     MerkleBlockTest().main()