1 #!/usr/bin/env python3
2 # Copyright (c) 2014-present The Bitcoin Core developers
3 # Distributed under the MIT software license, see the accompanying
4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 """Test gettxoutproof and verifytxoutproof RPCs."""
6 7 from test_framework.messages import (
8 CMerkleBlock,
9 from_hex,
10 )
11 from test_framework.test_framework import BitcoinTestFramework
12 from test_framework.util import (
13 assert_equal,
14 assert_raises_rpc_error,
15 sync_txindex,
16 )
17 from test_framework.wallet import MiniWallet
18 19 20 class MerkleBlockTest(BitcoinTestFramework):
21 def set_test_params(self):
22 self.num_nodes = 2
23 self.extra_args = [
24 [],
25 ["-txindex"],
26 ]
27 28 def run_test(self):
29 miniwallet = MiniWallet(self.nodes[0])
30 31 chain_height = self.nodes[1].getblockcount()
32 assert_equal(chain_height, 200)
33 34 txid1 = miniwallet.send_self_transfer(from_node=self.nodes[0])['txid']
35 txid2 = miniwallet.send_self_transfer(from_node=self.nodes[0])['txid']
36 # This will raise an exception because the transaction is not yet in a block
37 assert_raises_rpc_error(-5, "Transaction not yet in block", self.nodes[0].gettxoutproof, [txid1])
38 39 self.generate(self.nodes[0], 1)
40 blockhash = self.nodes[0].getblockhash(chain_height + 1)
41 42 txlist = []
43 blocktxn = self.nodes[0].getblock(blockhash, True)["tx"]
44 txlist.append(blocktxn[1])
45 txlist.append(blocktxn[2])
46 47 assert_equal(self.nodes[0].verifytxoutproof(self.nodes[0].gettxoutproof([txid1])), [txid1])
48 assert_equal(self.nodes[0].verifytxoutproof(self.nodes[0].gettxoutproof([txid1, txid2])), txlist)
49 assert_equal(self.nodes[0].verifytxoutproof(self.nodes[0].gettxoutproof([txid1, txid2], blockhash)), txlist)
50 51 txin_spent = miniwallet.get_utxo(txid=txid2) # Get the change from txid2
52 tx3 = miniwallet.send_self_transfer(from_node=self.nodes[0], utxo_to_spend=txin_spent)
53 txid3 = tx3['txid']
54 self.generate(self.nodes[0], 1)
55 56 txid_spent = txin_spent["txid"]
57 txid_unspent = txid1 # Input was change from txid2, so txid1 should be unspent
58 59 # Invalid txids
60 assert_raises_rpc_error(-8, "txid must be of length 64 (not 32, for '00000000000000000000000000000000')", self.nodes[0].gettxoutproof, ["00000000000000000000000000000000"], blockhash)
61 assert_raises_rpc_error(-8, "txid must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[0].gettxoutproof, ["ZZZ0000000000000000000000000000000000000000000000000000000000000"], blockhash)
62 # Invalid blockhashes
63 assert_raises_rpc_error(-8, "blockhash must be of length 64 (not 32, for '00000000000000000000000000000000')", self.nodes[0].gettxoutproof, [txid_spent], "00000000000000000000000000000000")
64 assert_raises_rpc_error(-8, "blockhash must be hexadecimal string (not 'ZZZ0000000000000000000000000000000000000000000000000000000000000')", self.nodes[0].gettxoutproof, [txid_spent], "ZZZ0000000000000000000000000000000000000000000000000000000000000")
65 # We can't find the block from a fully-spent tx
66 assert_raises_rpc_error(-5, "Transaction not yet in block", self.nodes[0].gettxoutproof, [txid_spent])
67 # We can get the proof if we specify the block
68 assert_equal(self.nodes[0].verifytxoutproof(self.nodes[0].gettxoutproof([txid_spent], blockhash)), [txid_spent])
69 # We can't get the proof if we specify a non-existent block
70 assert_raises_rpc_error(-5, "Block not found", self.nodes[0].gettxoutproof, [txid_spent], "0000000000000000000000000000000000000000000000000000000000000000")
71 # We can't get the proof if we only have the header of the specified block
72 block = self.generateblock(self.nodes[0], output="raw(55)", transactions=[], submit=False)
73 self.nodes[0].submitheader(block["hex"])
74 assert_raises_rpc_error(-1, "Block not available (not fully downloaded)", self.nodes[0].gettxoutproof, [txid_spent], block['hash'])
75 # We can get the proof if the transaction is unspent
76 assert_equal(self.nodes[0].verifytxoutproof(self.nodes[0].gettxoutproof([txid_unspent])), [txid_unspent])
77 # 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.
78 assert_equal(sorted(self.nodes[0].verifytxoutproof(self.nodes[0].gettxoutproof([txid1, txid2]))), sorted(txlist))
79 assert_equal(sorted(self.nodes[0].verifytxoutproof(self.nodes[0].gettxoutproof([txid2, txid1]))), sorted(txlist))
80 # We can always get a proof if we have a -txindex
81 sync_txindex(self, self.nodes[1])
82 assert_equal(self.nodes[0].verifytxoutproof(self.nodes[1].gettxoutproof([txid_spent])), [txid_spent])
83 # We can't get a proof if we specify transactions from different blocks
84 assert_raises_rpc_error(-5, "Not all transactions found in specified or retrieved block", self.nodes[0].gettxoutproof, [txid1, txid3])
85 # Test empty list
86 assert_raises_rpc_error(-8, "Parameter 'txids' cannot be empty", self.nodes[0].gettxoutproof, [])
87 # Test duplicate txid
88 assert_raises_rpc_error(-8, 'Invalid parameter, duplicated txid', self.nodes[0].gettxoutproof, [txid1, txid1])
89 90 # Now we'll try tweaking a proof.
91 proof = self.nodes[1].gettxoutproof([txid1, txid2])
92 assert txid1 in self.nodes[0].verifytxoutproof(proof)
93 assert txid2 in self.nodes[1].verifytxoutproof(proof)
94 95 tweaked_proof = from_hex(CMerkleBlock(), proof)
96 97 # Make sure that our serialization/deserialization is working
98 assert txid1 in self.nodes[0].verifytxoutproof(tweaked_proof.serialize().hex())
99 100 # Check to see if we can go up the merkle tree and pass this off as a
101 # single-transaction block
102 tweaked_proof.txn.nTransactions = 1
103 tweaked_proof.txn.vHash = [tweaked_proof.header.hashMerkleRoot]
104 tweaked_proof.txn.vBits = [True] + [False]*7
105 106 for n in self.nodes:
107 assert not n.verifytxoutproof(tweaked_proof.serialize().hex())
108 109 # TODO: try more variants, eg transactions at different depths, and
110 # verify that the proofs are invalid
111 112 if __name__ == '__main__':
113 MerkleBlockTest(__file__).main()
114