108 lines
4.2 KiB
Python
108 lines
4.2 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) 2020 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""
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Test LIP-0007
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1. Test getdata 'mwebheader' *before* MWEB activation
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2. Test getdata 'mwebheader' *after* MWEB activation
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"""
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from test_framework.messages import (
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CBlockHeader,
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CInv,
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Hash,
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hash256,
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msg_getdata,
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MSG_MWEB_HEADER,
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)
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from test_framework.p2p import P2PInterface, p2p_lock
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from test_framework.script import MAX_SCRIPT_ELEMENT_SIZE
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.ltc_util import FIRST_MWEB_HEIGHT, get_hogex_tx, get_mweb_header
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from test_framework.util import assert_equal
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# Can be used to mimic a light client requesting MWEB data from a full node
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class MockLightClient(P2PInterface):
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def __init__(self):
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super().__init__()
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self.merkle_blocks_with_mweb = {}
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self.block_headers = {}
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def request_mweb_header(self, block_hash):
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want = msg_getdata([CInv(MSG_MWEB_HEADER, int(block_hash, 16))])
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self.send_message(want)
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def on_mwebheader(self, message):
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self.merkle_blocks_with_mweb[message.header_hash()] = message.merkleblockwithmweb
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def on_block(self, message):
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message.block.calc_sha256()
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self.block_headers[Hash(message.block.sha256)] = CBlockHeader(message.block)
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class MWEBP2PTest(BitcoinTestFramework):
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def set_test_params(self):
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self.setup_clean_chain = True
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self.extra_args = [['-whitelist=noban@127.0.0.1']] # immediate tx relay
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self.num_nodes = 1
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def run_test(self):
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node = self.nodes[0]
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light_client = node.add_p2p_connection(MockLightClient())
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self.log.info("Generate pre-MWEB blocks")
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pre_mweb_block_hash = node.generate(FIRST_MWEB_HEIGHT - 1)[-1]
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self.log.info("Request mweb_header for pre-MWEB block '{}'".format(pre_mweb_block_hash))
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light_client.request_mweb_header(pre_mweb_block_hash)
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self.log.info("Activate MWEB")
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node.sendtoaddress(node.getnewaddress(address_type='mweb'), 1)
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post_mweb_block_hash = node.generate(1)[0]
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self.log.info("Request mweb_header for block '{}'".format(post_mweb_block_hash))
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light_client.request_mweb_header(post_mweb_block_hash)
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self.log.info("Waiting for mweb_header")
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light_client.wait_for_mwebheader(post_mweb_block_hash, 5)
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light_client.wait_for_block(int(post_mweb_block_hash, 16), 5)
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self.log.info("Assert results")
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# Before MWEB activation, no merkle block should be returned
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assert pre_mweb_block_hash not in light_client.merkle_blocks_with_mweb
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# After MWEB activation, the requested merkle block should be returned
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assert post_mweb_block_hash in light_client.merkle_blocks_with_mweb
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merkle_block_with_mweb = light_client.merkle_blocks_with_mweb[post_mweb_block_hash]
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# Check block header is correct
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assert Hash.from_hex(post_mweb_block_hash) in light_client.block_headers
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block_header = light_client.block_headers[Hash.from_hex(post_mweb_block_hash)]
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assert_equal(block_header, merkle_block_with_mweb.merkle.header)
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# Check MWEB header is correct
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mweb_header = get_mweb_header(node, post_mweb_block_hash)
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assert_equal(mweb_header, merkle_block_with_mweb.mweb_header)
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# Check HogEx transaction is correct
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hogex_tx = get_hogex_tx(node, post_mweb_block_hash)
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assert_equal(hogex_tx, merkle_block_with_mweb.hogex)
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# Check Merkle tree
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merkle_tree = merkle_block_with_mweb.merkle.txn
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assert_equal(3, merkle_tree.nTransactions)
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assert_equal(2, len(merkle_tree.vHash))
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left_hash = Hash(merkle_tree.vHash[0])
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right_hash = Hash(merkle_tree.vHash[1])
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assert_equal(Hash.from_hex(hogex_tx.hash), right_hash)
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right_branch_bytes = hash256(right_hash.serialize() + right_hash.serialize())
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merkle_root_bytes = hash256(left_hash.serialize() + right_branch_bytes)
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assert_equal(Hash.from_byte_arr(merkle_root_bytes), Hash(block_header.hashMerkleRoot))
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if __name__ == '__main__':
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MWEBP2PTest().main() |