3862e473f0
This combines reporting of buried (formally ISM) softfork deployments and BIP9 versionbits softfork deployments into one JSON object in the getblockchaininfo return object.
152 lines
6.2 KiB
Python
Executable file
152 lines
6.2 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2015-2019 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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"""Test BIP66 (DER SIG).
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Test that the DERSIG soft-fork activates at (regtest) height 1251.
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"""
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from test_framework.blocktools import create_coinbase, create_block, create_transaction
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from test_framework.messages import msg_block
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from test_framework.mininode import mininode_lock, P2PInterface
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from test_framework.script import CScript
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import (
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assert_equal,
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wait_until,
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)
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DERSIG_HEIGHT = 1251
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# Reject codes that we might receive in this test
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REJECT_INVALID = 16
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REJECT_NONSTANDARD = 64
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# A canonical signature consists of:
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# <30> <total len> <02> <len R> <R> <02> <len S> <S> <hashtype>
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def unDERify(tx):
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"""
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Make the signature in vin 0 of a tx non-DER-compliant,
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by adding padding after the S-value.
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"""
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scriptSig = CScript(tx.vin[0].scriptSig)
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newscript = []
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for i in scriptSig:
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if (len(newscript) == 0):
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newscript.append(i[0:-1] + b'\0' + i[-1:])
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else:
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newscript.append(i)
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tx.vin[0].scriptSig = CScript(newscript)
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class BIP66Test(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.extra_args = [['-whitelist=127.0.0.1', '-par=1', '-enablebip61']] # Use only one script thread to get the exact reject reason for testing
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self.setup_clean_chain = True
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self.rpc_timeout = 120
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def skip_test_if_missing_module(self):
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self.skip_if_no_wallet()
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def test_dersig_info(self, *, is_active):
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assert_equal(self.nodes[0].getblockchaininfo()['softforks']['bip66'],
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{
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"active": is_active,
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"height": DERSIG_HEIGHT,
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"type": "buried",
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},
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)
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def run_test(self):
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self.nodes[0].add_p2p_connection(P2PInterface())
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self.test_dersig_info(is_active=False)
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self.log.info("Mining %d blocks", DERSIG_HEIGHT - 2)
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self.coinbase_txids = [self.nodes[0].getblock(b)['tx'][0] for b in self.nodes[0].generate(DERSIG_HEIGHT - 2)]
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self.nodeaddress = self.nodes[0].getnewaddress()
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self.log.info("Test that a transaction with non-DER signature can still appear in a block")
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spendtx = create_transaction(self.nodes[0], self.coinbase_txids[0],
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self.nodeaddress, amount=1.0)
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unDERify(spendtx)
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spendtx.rehash()
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tip = self.nodes[0].getbestblockhash()
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block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
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block = create_block(int(tip, 16), create_coinbase(DERSIG_HEIGHT - 1), block_time)
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block.nVersion = 2
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block.vtx.append(spendtx)
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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block.solve()
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self.test_dersig_info(is_active=False) # Not active as of current tip and next block does not need to obey rules
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self.nodes[0].p2p.send_and_ping(msg_block(block))
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self.test_dersig_info(is_active=True) # Not active as of current tip, but next block must obey rules
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assert_equal(self.nodes[0].getbestblockhash(), block.hash)
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self.log.info("Test that blocks must now be at least version 3")
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tip = block.sha256
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block_time += 1
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block = create_block(tip, create_coinbase(DERSIG_HEIGHT), block_time)
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block.nVersion = 2
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block.rehash()
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block.solve()
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with self.nodes[0].assert_debug_log(expected_msgs=['{}, bad-version(0x00000002)'.format(block.hash)]):
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self.nodes[0].p2p.send_and_ping(msg_block(block))
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assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
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self.nodes[0].p2p.sync_with_ping()
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self.log.info("Test that transactions with non-DER signatures cannot appear in a block")
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block.nVersion = 3
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spendtx = create_transaction(self.nodes[0], self.coinbase_txids[1],
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self.nodeaddress, amount=1.0)
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unDERify(spendtx)
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spendtx.rehash()
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# First we show that this tx is valid except for DERSIG by getting it
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# rejected from the mempool for exactly that reason.
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assert_equal(
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[{'txid': spendtx.hash, 'allowed': False, 'reject-reason': '64: non-mandatory-script-verify-flag (Non-canonical DER signature)'}],
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self.nodes[0].testmempoolaccept(rawtxs=[spendtx.serialize().hex()], maxfeerate=0)
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)
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# Now we verify that a block with this transaction is also invalid.
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block.vtx.append(spendtx)
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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block.solve()
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with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputs on {} failed with non-mandatory-script-verify-flag (Non-canonical DER signature)'.format(block.vtx[-1].hash)]):
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self.nodes[0].p2p.send_and_ping(msg_block(block))
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assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
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self.nodes[0].p2p.sync_with_ping()
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wait_until(lambda: "reject" in self.nodes[0].p2p.last_message.keys(), lock=mininode_lock)
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with mininode_lock:
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assert self.nodes[0].p2p.last_message["reject"].code in [REJECT_INVALID, REJECT_NONSTANDARD]
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assert_equal(self.nodes[0].p2p.last_message["reject"].data, block.sha256)
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assert b'Non-canonical DER signature' in self.nodes[0].p2p.last_message["reject"].reason
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self.log.info("Test that a version 3 block with a DERSIG-compliant transaction is accepted")
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block.vtx[1] = create_transaction(self.nodes[0], self.coinbase_txids[1], self.nodeaddress, amount=1.0)
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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block.solve()
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self.test_dersig_info(is_active=True) # Not active as of current tip, but next block must obey rules
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self.nodes[0].p2p.send_and_ping(msg_block(block))
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self.test_dersig_info(is_active=True) # Active as of current tip
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assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256)
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if __name__ == '__main__':
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BIP66Test().main()
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