#!/usr/bin/env python3 # Copyright (c) 2014-2018 The Bitcoin Core developers # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. """Test gettxoutproof and verifytxoutproof RPCs.""" from test_framework.messages import CMerkleBlock, FromHex, ToHex from test_framework.test_framework import BitcoinTestFramework from test_framework.util import assert_equal, assert_raises_rpc_error, connect_nodes class MerkleBlockTest(BitcoinTestFramework): def set_test_params(self): self.num_nodes = 4 self.setup_clean_chain = True # Nodes 0/1 are "wallet" nodes, Nodes 2/3 are used for testing self.extra_args = [[], [], [], ["-txindex"]] def skip_test_if_missing_module(self): self.skip_if_no_wallet() def setup_network(self): self.setup_nodes() connect_nodes(self.nodes[0], 1) connect_nodes(self.nodes[0], 2) connect_nodes(self.nodes[0], 3) self.sync_all() def run_test(self): self.log.info("Mining blocks...") self.nodes[0].generate(105) self.sync_all() chain_height = self.nodes[1].getblockcount() assert_equal(chain_height, 105) assert_equal(self.nodes[1].getbalance(), 0) assert_equal(self.nodes[2].getbalance(), 0) node0utxos = self.nodes[0].listunspent(1) tx1 = self.nodes[0].createrawtransaction([node0utxos.pop()], {self.nodes[1].getnewaddress(): 49.99}) txid1 = self.nodes[0].sendrawtransaction(self.nodes[0].signrawtransactionwithwallet(tx1)["hex"]) tx2 = self.nodes[0].createrawtransaction([node0utxos.pop()], {self.nodes[1].getnewaddress(): 49.99}) txid2 = self.nodes[0].sendrawtransaction(self.nodes[0].signrawtransactionwithwallet(tx2)["hex"]) # This will raise an exception because the transaction is not yet in a block assert_raises_rpc_error(-5, "Transaction not yet in block", self.nodes[0].gettxoutproof, [txid1]) self.nodes[0].generate(1) blockhash = self.nodes[0].getblockhash(chain_height + 1) self.sync_all() txlist = [] blocktxn = self.nodes[0].getblock(blockhash, True)["tx"] txlist.append(blocktxn[1]) txlist.append(blocktxn[2]) assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1])), [txid1]) assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1, txid2])), txlist) assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid1, txid2], blockhash)), txlist) txin_spent = self.nodes[1].listunspent(1).pop() tx3 = self.nodes[1].createrawtransaction([txin_spent], {self.nodes[0].getnewaddress(): 49.98}) txid3 = self.nodes[0].sendrawtransaction(self.nodes[1].signrawtransactionwithwallet(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 # Invalid txids assert_raises_rpc_error(-8, "txid must be of length 64 (not 32, for '00000000000000000000000000000000')", self.nodes[2].gettxoutproof, ["00000000000000000000000000000000"], blockhash) assert_raises_rpc_error(-8, "txid must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[2].gettxoutproof, ["ZZZ0000000000000000000000000000000000000000000000000000000000000"], blockhash) # Invalid blockhashes assert_raises_rpc_error(-8, "blockhash must be of length 64 (not 32, for '00000000000000000000000000000000')", self.nodes[2].gettxoutproof, [txid_spent], "00000000000000000000000000000000") assert_raises_rpc_error(-8, "blockhash must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[2].gettxoutproof, [txid_spent], "ZZZ0000000000000000000000000000000000000000000000000000000000000") # We can't find the block from a fully-spent tx assert_raises_rpc_error(-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]) # We can't get the proof if we specify a non-existent block assert_raises_rpc_error(-5, "Block not found", self.nodes[2].gettxoutproof, [txid_spent], "0000000000000000000000000000000000000000000000000000000000000000") # We can get the proof if the transaction is unspent assert_equal(self.nodes[2].verifytxoutproof(self.nodes[2].gettxoutproof([txid_unspent])), [txid_unspent]) # 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_rpc_error(-5, "Not all transactions found in specified or retrieved block", self.nodes[2].gettxoutproof, [txid1, txid3]) # Now we'll try tweaking a proof. proof = self.nodes[3].gettxoutproof([txid1, txid2]) assert txid1 in self.nodes[0].verifytxoutproof(proof) assert txid2 in self.nodes[1].verifytxoutproof(proof) tweaked_proof = FromHex(CMerkleBlock(), proof) # Make sure that our serialization/deserialization is working assert txid1 in self.nodes[2].verifytxoutproof(ToHex(tweaked_proof)) # Check to see if we can go up the merkle tree and pass this off as a # single-transaction block tweaked_proof.txn.nTransactions = 1 tweaked_proof.txn.vHash = [tweaked_proof.header.hashMerkleRoot] tweaked_proof.txn.vBits = [True] + [False]*7 for n in self.nodes: assert not n.verifytxoutproof(ToHex(tweaked_proof)) # TODO: try more variants, eg transactions at different depths, and # verify that the proofs are invalid if __name__ == '__main__': MerkleBlockTest().main()