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1418 lines
64 KiB
1418 lines
64 KiB
#!/usr/bin/env python3
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# Copyright (c) 2015-2020 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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"""Test block processing."""
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import copy
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import struct
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import time
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from test_framework.blocktools import (
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create_block,
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create_coinbase,
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create_tx_with_script,
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get_legacy_sigopcount_block,
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MAX_BLOCK_SIGOPS,
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)
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from test_framework.key import ECKey
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from test_framework.messages import (
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CBlock,
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COIN,
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COutPoint,
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CTransaction,
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CTxIn,
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CTxOut,
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MAX_BLOCK_BASE_SIZE,
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uint256_from_compact,
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uint256_from_str,
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)
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from test_framework.p2p import P2PDataStore
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from test_framework.script import (
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CScript,
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MAX_SCRIPT_ELEMENT_SIZE,
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OP_2DUP,
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OP_CHECKMULTISIG,
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OP_CHECKMULTISIGVERIFY,
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OP_CHECKSIG,
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OP_CHECKSIGVERIFY,
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OP_ELSE,
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OP_ENDIF,
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OP_EQUAL,
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OP_DROP,
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OP_FALSE,
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OP_HASH160,
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OP_IF,
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OP_INVALIDOPCODE,
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OP_RETURN,
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OP_TRUE,
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SIGHASH_ALL,
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LegacySignatureHash,
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hash160,
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)
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal
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from data import invalid_txs
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# Use this class for tests that require behavior other than normal p2p behavior.
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# For now, it is used to serialize a bloated varint (b64).
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class CBrokenBlock(CBlock):
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def initialize(self, base_block):
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self.vtx = copy.deepcopy(base_block.vtx)
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self.hashMerkleRoot = self.calc_merkle_root()
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def serialize(self, with_witness=False):
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r = b""
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r += super(CBlock, self).serialize()
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r += struct.pack("<BQ", 255, len(self.vtx))
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for tx in self.vtx:
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if with_witness:
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r += tx.serialize_with_witness()
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else:
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r += tx.serialize_without_witness()
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return r
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def normal_serialize(self):
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return super().serialize()
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DUPLICATE_COINBASE_SCRIPT_SIG = b'\x01\x78' # Valid for block at height 120
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class FullBlockTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.setup_clean_chain = True
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self.extra_args = [['-acceptnonstdtxn=1']] # This is a consensus block test, we don't care about tx policy
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def run_test(self):
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node = self.nodes[0] # convenience reference to the node
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self.bootstrap_p2p() # Add one p2p connection to the node
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self.block_heights = {}
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self.coinbase_key = ECKey()
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self.coinbase_key.generate()
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self.coinbase_pubkey = self.coinbase_key.get_pubkey().get_bytes()
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self.tip = None
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self.blocks = {}
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self.genesis_hash = int(self.nodes[0].getbestblockhash(), 16)
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self.block_heights[self.genesis_hash] = 0
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self.spendable_outputs = []
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# Create a new block
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b_dup_cb = self.next_block('dup_cb')
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b_dup_cb.vtx[0].vin[0].scriptSig = DUPLICATE_COINBASE_SCRIPT_SIG
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b_dup_cb.vtx[0].rehash()
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duplicate_tx = b_dup_cb.vtx[0]
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b_dup_cb = self.update_block('dup_cb', [])
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self.send_blocks([b_dup_cb])
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b0 = self.next_block(0)
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self.save_spendable_output()
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self.send_blocks([b0])
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# These constants chosen specifically to trigger an immature coinbase spend
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# at a certain time below.
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NUM_BUFFER_BLOCKS_TO_GENERATE = 99
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NUM_OUTPUTS_TO_COLLECT = 33
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# Allow the block to mature
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blocks = []
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for i in range(NUM_BUFFER_BLOCKS_TO_GENERATE):
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blocks.append(self.next_block("maturitybuffer.{}".format(i)))
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self.save_spendable_output()
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self.send_blocks(blocks)
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# collect spendable outputs now to avoid cluttering the code later on
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out = []
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for _ in range(NUM_OUTPUTS_TO_COLLECT):
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out.append(self.get_spendable_output())
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# Start by building a couple of blocks on top (which output is spent is
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# in parentheses):
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# genesis -> b1 (0) -> b2 (1)
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b1 = self.next_block(1, spend=out[0])
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self.save_spendable_output()
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b2 = self.next_block(2, spend=out[1])
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self.save_spendable_output()
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self.send_blocks([b1, b2], timeout=4)
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# Select a txn with an output eligible for spending. This won't actually be spent,
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# since we're testing submission of a series of blocks with invalid txns.
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attempt_spend_tx = out[2]
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# Submit blocks for rejection, each of which contains a single transaction
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# (aside from coinbase) which should be considered invalid.
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for TxTemplate in invalid_txs.iter_all_templates():
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template = TxTemplate(spend_tx=attempt_spend_tx)
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if template.valid_in_block:
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continue
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self.log.info("Reject block with invalid tx: %s", TxTemplate.__name__)
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blockname = "for_invalid.%s" % TxTemplate.__name__
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badblock = self.next_block(blockname)
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badtx = template.get_tx()
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if TxTemplate != invalid_txs.InputMissing:
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self.sign_tx(badtx, attempt_spend_tx)
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badtx.rehash()
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badblock = self.update_block(blockname, [badtx])
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self.send_blocks(
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[badblock], success=False,
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reject_reason=(template.block_reject_reason or template.reject_reason),
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reconnect=True, timeout=2)
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self.move_tip(2)
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# Fork like this:
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#
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# genesis -> b1 (0) -> b2 (1)
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# \-> b3 (1)
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#
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# Nothing should happen at this point. We saw b2 first so it takes priority.
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self.log.info("Don't reorg to a chain of the same length")
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self.move_tip(1)
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b3 = self.next_block(3, spend=out[1])
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txout_b3 = b3.vtx[1]
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self.send_blocks([b3], False)
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# Now we add another block to make the alternative chain longer.
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#
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# genesis -> b1 (0) -> b2 (1)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reorg to a longer chain")
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b4 = self.next_block(4, spend=out[2])
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self.send_blocks([b4])
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# ... and back to the first chain.
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b3 (1) -> b4 (2)
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self.move_tip(2)
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b5 = self.next_block(5, spend=out[2])
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self.save_spendable_output()
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self.send_blocks([b5], False)
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self.log.info("Reorg back to the original chain")
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b6 = self.next_block(6, spend=out[3])
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self.send_blocks([b6], True)
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# Try to create a fork that double-spends
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b7 (2) -> b8 (4)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a chain with a double spend, even if it is longer")
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self.move_tip(5)
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b7 = self.next_block(7, spend=out[2])
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self.send_blocks([b7], False)
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b8 = self.next_block(8, spend=out[4])
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self.send_blocks([b8], False, reconnect=True)
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# Try to create a block that has too much fee
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b9 (4)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a block where the miner creates too much coinbase reward")
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self.move_tip(6)
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b9 = self.next_block(9, spend=out[4], additional_coinbase_value=1)
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self.send_blocks([b9], success=False, reject_reason='bad-cb-amount', reconnect=True)
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# Create a fork that ends in a block with too much fee (the one that causes the reorg)
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b10 (3) -> b11 (4)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a chain where the miner creates too much coinbase reward, even if the chain is longer")
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self.move_tip(5)
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b10 = self.next_block(10, spend=out[3])
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self.send_blocks([b10], False)
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b11 = self.next_block(11, spend=out[4], additional_coinbase_value=1)
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self.send_blocks([b11], success=False, reject_reason='bad-cb-amount', reconnect=True)
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# Try again, but with a valid fork first
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b14 (5)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a chain where the miner creates too much coinbase reward, even if the chain is longer (on a forked chain)")
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self.move_tip(5)
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b12 = self.next_block(12, spend=out[3])
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self.save_spendable_output()
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b13 = self.next_block(13, spend=out[4])
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self.save_spendable_output()
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b14 = self.next_block(14, spend=out[5], additional_coinbase_value=1)
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self.send_blocks([b12, b13, b14], success=False, reject_reason='bad-cb-amount', reconnect=True)
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# New tip should be b13.
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assert_equal(node.getbestblockhash(), b13.hash)
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# Add a block with MAX_BLOCK_SIGOPS and one with one more sigop
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b15 (5) -> b16 (6)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Accept a block with lots of checksigs")
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lots_of_checksigs = CScript([OP_CHECKSIG] * (MAX_BLOCK_SIGOPS - 1))
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self.move_tip(13)
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b15 = self.next_block(15, spend=out[5], script=lots_of_checksigs)
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self.save_spendable_output()
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self.send_blocks([b15], True)
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self.log.info("Reject a block with too many checksigs")
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too_many_checksigs = CScript([OP_CHECKSIG] * (MAX_BLOCK_SIGOPS))
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b16 = self.next_block(16, spend=out[6], script=too_many_checksigs)
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self.send_blocks([b16], success=False, reject_reason='bad-blk-sigops', reconnect=True)
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# Attempt to spend a transaction created on a different fork
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b15 (5) -> b17 (b3.vtx[1])
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a block with a spend from a re-org'ed out tx")
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self.move_tip(15)
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b17 = self.next_block(17, spend=txout_b3)
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self.send_blocks([b17], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
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# Attempt to spend a transaction created on a different fork (on a fork this time)
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b15 (5)
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# \-> b18 (b3.vtx[1]) -> b19 (6)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a block with a spend from a re-org'ed out tx (on a forked chain)")
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self.move_tip(13)
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b18 = self.next_block(18, spend=txout_b3)
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self.send_blocks([b18], False)
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b19 = self.next_block(19, spend=out[6])
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self.send_blocks([b19], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
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# Attempt to spend a coinbase at depth too low
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b15 (5) -> b20 (7)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a block spending an immature coinbase.")
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self.move_tip(15)
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b20 = self.next_block(20, spend=out[7])
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self.send_blocks([b20], success=False, reject_reason='bad-txns-premature-spend-of-coinbase', reconnect=True)
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# Attempt to spend a coinbase at depth too low (on a fork this time)
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b15 (5)
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# \-> b21 (6) -> b22 (5)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a block spending an immature coinbase (on a forked chain)")
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self.move_tip(13)
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b21 = self.next_block(21, spend=out[6])
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self.send_blocks([b21], False)
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b22 = self.next_block(22, spend=out[5])
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self.send_blocks([b22], success=False, reject_reason='bad-txns-premature-spend-of-coinbase', reconnect=True)
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# Create a block on either side of MAX_BLOCK_BASE_SIZE and make sure its accepted/rejected
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b15 (5) -> b23 (6)
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# \-> b24 (6) -> b25 (7)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Accept a block of size MAX_BLOCK_BASE_SIZE")
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self.move_tip(15)
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b23 = self.next_block(23, spend=out[6])
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tx = CTransaction()
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script_length = MAX_BLOCK_BASE_SIZE - len(b23.serialize()) - 69
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script_output = CScript([b'\x00' * script_length])
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tx.vout.append(CTxOut(0, script_output))
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tx.vin.append(CTxIn(COutPoint(b23.vtx[1].sha256, 0)))
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b23 = self.update_block(23, [tx])
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# Make sure the math above worked out to produce a max-sized block
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assert_equal(len(b23.serialize()), MAX_BLOCK_BASE_SIZE)
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self.send_blocks([b23], True)
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self.save_spendable_output()
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self.log.info("Reject a block of size MAX_BLOCK_BASE_SIZE + 1")
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self.move_tip(15)
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b24 = self.next_block(24, spend=out[6])
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script_length = MAX_BLOCK_BASE_SIZE - len(b24.serialize()) - 69
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script_output = CScript([b'\x00' * (script_length + 1)])
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tx.vout = [CTxOut(0, script_output)]
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b24 = self.update_block(24, [tx])
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assert_equal(len(b24.serialize()), MAX_BLOCK_BASE_SIZE + 1)
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self.send_blocks([b24], success=False, reject_reason='bad-blk-length', reconnect=True)
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b25 = self.next_block(25, spend=out[7])
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self.send_blocks([b25], False)
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# Create blocks with a coinbase input script size out of range
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# genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
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# \-> b12 (3) -> b13 (4) -> b15 (5) -> b23 (6) -> b30 (7)
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# \-> ... (6) -> ... (7)
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# \-> b3 (1) -> b4 (2)
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self.log.info("Reject a block with coinbase input script size out of range")
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self.move_tip(15)
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b26 = self.next_block(26, spend=out[6])
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b26.vtx[0].vin[0].scriptSig = b'\x00'
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b26.vtx[0].rehash()
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# update_block causes the merkle root to get updated, even with no new
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# transactions, and updates the required state.
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b26 = self.update_block(26, [])
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self.send_blocks([b26], success=False, reject_reason='bad-cb-length', reconnect=True)
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# Extend the b26 chain to make sure bitcoind isn't accepting b26
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b27 = self.next_block(27, spend=out[7])
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self.send_blocks([b27], False)
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# Now try a too-large-coinbase script
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self.move_tip(15)
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b28 = self.next_block(28, spend=out[6])
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b28.vtx[0].vin[0].scriptSig = b'\x00' * 101
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b28.vtx[0].rehash()
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b28 = self.update_block(28, [])
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self.send_blocks([b28], success=False, reject_reason='bad-cb-length', reconnect=True)
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# Extend the b28 chain to make sure bitcoind isn't accepting b28
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b29 = self.next_block(29, spend=out[7])
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self.send_blocks([b29], False)
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# b30 has a max-sized coinbase scriptSig.
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self.move_tip(23)
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b30 = self.next_block(30)
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b30.vtx[0].vin[0].scriptSig = b'\x00' * 100
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b30.vtx[0].rehash()
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b30 = self.update_block(30, [])
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self.send_blocks([b30], True)
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self.save_spendable_output()
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# b31 - b35 - check sigops of OP_CHECKMULTISIG / OP_CHECKMULTISIGVERIFY / OP_CHECKSIGVERIFY
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#
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# genesis -> ... -> b30 (7) -> b31 (8) -> b33 (9) -> b35 (10)
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# \-> b36 (11)
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# \-> b34 (10)
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# \-> b32 (9)
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#
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# MULTISIG: each op code counts as 20 sigops. To create the edge case, pack another 19 sigops at the end.
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self.log.info("Accept a block with the max number of OP_CHECKMULTISIG sigops")
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lots_of_multisigs = CScript([OP_CHECKMULTISIG] * ((MAX_BLOCK_SIGOPS - 1) // 20) + [OP_CHECKSIG] * 19)
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b31 = self.next_block(31, spend=out[8], script=lots_of_multisigs)
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assert_equal(get_legacy_sigopcount_block(b31), MAX_BLOCK_SIGOPS)
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self.send_blocks([b31], True)
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self.save_spendable_output()
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# this goes over the limit because the coinbase has one sigop
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self.log.info("Reject a block with too many OP_CHECKMULTISIG sigops")
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too_many_multisigs = CScript([OP_CHECKMULTISIG] * (MAX_BLOCK_SIGOPS // 20))
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b32 = self.next_block(32, spend=out[9], script=too_many_multisigs)
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assert_equal(get_legacy_sigopcount_block(b32), MAX_BLOCK_SIGOPS + 1)
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self.send_blocks([b32], success=False, reject_reason='bad-blk-sigops', reconnect=True)
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# CHECKMULTISIGVERIFY
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|
self.log.info("Accept a block with the max number of OP_CHECKMULTISIGVERIFY sigops")
|
|
self.move_tip(31)
|
|
lots_of_multisigs = CScript([OP_CHECKMULTISIGVERIFY] * ((MAX_BLOCK_SIGOPS - 1) // 20) + [OP_CHECKSIG] * 19)
|
|
b33 = self.next_block(33, spend=out[9], script=lots_of_multisigs)
|
|
self.send_blocks([b33], True)
|
|
self.save_spendable_output()
|
|
|
|
self.log.info("Reject a block with too many OP_CHECKMULTISIGVERIFY sigops")
|
|
too_many_multisigs = CScript([OP_CHECKMULTISIGVERIFY] * (MAX_BLOCK_SIGOPS // 20))
|
|
b34 = self.next_block(34, spend=out[10], script=too_many_multisigs)
|
|
self.send_blocks([b34], success=False, reject_reason='bad-blk-sigops', reconnect=True)
|
|
|
|
# CHECKSIGVERIFY
|
|
self.log.info("Accept a block with the max number of OP_CHECKSIGVERIFY sigops")
|
|
self.move_tip(33)
|
|
lots_of_checksigs = CScript([OP_CHECKSIGVERIFY] * (MAX_BLOCK_SIGOPS - 1))
|
|
b35 = self.next_block(35, spend=out[10], script=lots_of_checksigs)
|
|
self.send_blocks([b35], True)
|
|
self.save_spendable_output()
|
|
|
|
self.log.info("Reject a block with too many OP_CHECKSIGVERIFY sigops")
|
|
too_many_checksigs = CScript([OP_CHECKSIGVERIFY] * (MAX_BLOCK_SIGOPS))
|
|
b36 = self.next_block(36, spend=out[11], script=too_many_checksigs)
|
|
self.send_blocks([b36], success=False, reject_reason='bad-blk-sigops', reconnect=True)
|
|
|
|
# Check spending of a transaction in a block which failed to connect
|
|
#
|
|
# b6 (3)
|
|
# b12 (3) -> b13 (4) -> b15 (5) -> b23 (6) -> b30 (7) -> b31 (8) -> b33 (9) -> b35 (10)
|
|
# \-> b37 (11)
|
|
# \-> b38 (11/37)
|
|
#
|
|
|
|
# save 37's spendable output, but then double-spend out11 to invalidate the block
|
|
self.log.info("Reject a block spending transaction from a block which failed to connect")
|
|
self.move_tip(35)
|
|
b37 = self.next_block(37, spend=out[11])
|
|
txout_b37 = b37.vtx[1]
|
|
tx = self.create_and_sign_transaction(out[11], 0)
|
|
b37 = self.update_block(37, [tx])
|
|
self.send_blocks([b37], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
|
|
|
|
# attempt to spend b37's first non-coinbase tx, at which point b37 was still considered valid
|
|
self.move_tip(35)
|
|
b38 = self.next_block(38, spend=txout_b37)
|
|
self.send_blocks([b38], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
|
|
|
|
# Check P2SH SigOp counting
|
|
#
|
|
#
|
|
# 13 (4) -> b15 (5) -> b23 (6) -> b30 (7) -> b31 (8) -> b33 (9) -> b35 (10) -> b39 (11) -> b41 (12)
|
|
# \-> b40 (12)
|
|
#
|
|
# b39 - create some P2SH outputs that will require 6 sigops to spend:
|
|
#
|
|
# redeem_script = COINBASE_PUBKEY, (OP_2DUP+OP_CHECKSIGVERIFY) * 5, OP_CHECKSIG
|
|
# p2sh_script = OP_HASH160, ripemd160(sha256(script)), OP_EQUAL
|
|
#
|
|
self.log.info("Check P2SH SIGOPS are correctly counted")
|
|
self.move_tip(35)
|
|
b39 = self.next_block(39)
|
|
b39_outputs = 0
|
|
b39_sigops_per_output = 6
|
|
|
|
# Build the redeem script, hash it, use hash to create the p2sh script
|
|
redeem_script = CScript([self.coinbase_pubkey] + [OP_2DUP, OP_CHECKSIGVERIFY] * 5 + [OP_CHECKSIG])
|
|
redeem_script_hash = hash160(redeem_script)
|
|
p2sh_script = CScript([OP_HASH160, redeem_script_hash, OP_EQUAL])
|
|
|
|
# Create a transaction that spends one satoshi to the p2sh_script, the rest to OP_TRUE
|
|
# This must be signed because it is spending a coinbase
|
|
spend = out[11]
|
|
tx = self.create_tx(spend, 0, 1, p2sh_script)
|
|
tx.vout.append(CTxOut(spend.vout[0].nValue - 1, CScript([OP_TRUE])))
|
|
self.sign_tx(tx, spend)
|
|
tx.rehash()
|
|
b39 = self.update_block(39, [tx])
|
|
b39_outputs += 1
|
|
|
|
# Until block is full, add tx's with 1 satoshi to p2sh_script, the rest to OP_TRUE
|
|
tx_new = None
|
|
tx_last = tx
|
|
total_size = len(b39.serialize())
|
|
while(total_size < MAX_BLOCK_BASE_SIZE):
|
|
tx_new = self.create_tx(tx_last, 1, 1, p2sh_script)
|
|
tx_new.vout.append(CTxOut(tx_last.vout[1].nValue - 1, CScript([OP_TRUE])))
|
|
tx_new.rehash()
|
|
total_size += len(tx_new.serialize())
|
|
if total_size >= MAX_BLOCK_BASE_SIZE:
|
|
break
|
|
b39.vtx.append(tx_new) # add tx to block
|
|
tx_last = tx_new
|
|
b39_outputs += 1
|
|
|
|
# The accounting in the loop above can be off, because it misses the
|
|
# compact size encoding of the number of transactions in the block.
|
|
# Make sure we didn't accidentally make too big a block. Note that the
|
|
# size of the block has non-determinism due to the ECDSA signature in
|
|
# the first transaction.
|
|
while (len(b39.serialize()) >= MAX_BLOCK_BASE_SIZE):
|
|
del b39.vtx[-1]
|
|
|
|
b39 = self.update_block(39, [])
|
|
self.send_blocks([b39], True)
|
|
self.save_spendable_output()
|
|
|
|
# Test sigops in P2SH redeem scripts
|
|
#
|
|
# b40 creates 3333 tx's spending the 6-sigop P2SH outputs from b39 for a total of 19998 sigops.
|
|
# The first tx has one sigop and then at the end we add 2 more to put us just over the max.
|
|
#
|
|
# b41 does the same, less one, so it has the maximum sigops permitted.
|
|
#
|
|
self.log.info("Reject a block with too many P2SH sigops")
|
|
self.move_tip(39)
|
|
b40 = self.next_block(40, spend=out[12])
|
|
sigops = get_legacy_sigopcount_block(b40)
|
|
numTxes = (MAX_BLOCK_SIGOPS - sigops) // b39_sigops_per_output
|
|
assert_equal(numTxes <= b39_outputs, True)
|
|
|
|
lastOutpoint = COutPoint(b40.vtx[1].sha256, 0)
|
|
new_txs = []
|
|
for i in range(1, numTxes + 1):
|
|
tx = CTransaction()
|
|
tx.vout.append(CTxOut(1, CScript([OP_TRUE])))
|
|
tx.vin.append(CTxIn(lastOutpoint, b''))
|
|
# second input is corresponding P2SH output from b39
|
|
tx.vin.append(CTxIn(COutPoint(b39.vtx[i].sha256, 0), b''))
|
|
# Note: must pass the redeem_script (not p2sh_script) to the signature hash function
|
|
(sighash, err) = LegacySignatureHash(redeem_script, tx, 1, SIGHASH_ALL)
|
|
sig = self.coinbase_key.sign_ecdsa(sighash) + bytes(bytearray([SIGHASH_ALL]))
|
|
scriptSig = CScript([sig, redeem_script])
|
|
|
|
tx.vin[1].scriptSig = scriptSig
|
|
tx.rehash()
|
|
new_txs.append(tx)
|
|
lastOutpoint = COutPoint(tx.sha256, 0)
|
|
|
|
b40_sigops_to_fill = MAX_BLOCK_SIGOPS - (numTxes * b39_sigops_per_output + sigops) + 1
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(lastOutpoint, b''))
|
|
tx.vout.append(CTxOut(1, CScript([OP_CHECKSIG] * b40_sigops_to_fill)))
|
|
tx.rehash()
|
|
new_txs.append(tx)
|
|
self.update_block(40, new_txs)
|
|
self.send_blocks([b40], success=False, reject_reason='bad-blk-sigops', reconnect=True)
|
|
|
|
# same as b40, but one less sigop
|
|
self.log.info("Accept a block with the max number of P2SH sigops")
|
|
self.move_tip(39)
|
|
b41 = self.next_block(41, spend=None)
|
|
self.update_block(41, b40.vtx[1:-1])
|
|
b41_sigops_to_fill = b40_sigops_to_fill - 1
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(lastOutpoint, b''))
|
|
tx.vout.append(CTxOut(1, CScript([OP_CHECKSIG] * b41_sigops_to_fill)))
|
|
tx.rehash()
|
|
self.update_block(41, [tx])
|
|
self.send_blocks([b41], True)
|
|
|
|
# Fork off of b39 to create a constant base again
|
|
#
|
|
# b23 (6) -> b30 (7) -> b31 (8) -> b33 (9) -> b35 (10) -> b39 (11) -> b42 (12) -> b43 (13)
|
|
# \-> b41 (12)
|
|
#
|
|
self.move_tip(39)
|
|
b42 = self.next_block(42, spend=out[12])
|
|
self.save_spendable_output()
|
|
|
|
b43 = self.next_block(43, spend=out[13])
|
|
self.save_spendable_output()
|
|
self.send_blocks([b42, b43], True)
|
|
|
|
# Test a number of really invalid scenarios
|
|
#
|
|
# -> b31 (8) -> b33 (9) -> b35 (10) -> b39 (11) -> b42 (12) -> b43 (13) -> b44 (14)
|
|
# \-> ??? (15)
|
|
|
|
# The next few blocks are going to be created "by hand" since they'll do funky things, such as having
|
|
# the first transaction be non-coinbase, etc. The purpose of b44 is to make sure this works.
|
|
self.log.info("Build block 44 manually")
|
|
height = self.block_heights[self.tip.sha256] + 1
|
|
coinbase = create_coinbase(height, self.coinbase_pubkey)
|
|
b44 = CBlock()
|
|
b44.nTime = self.tip.nTime + 1
|
|
b44.hashPrevBlock = self.tip.sha256
|
|
b44.nBits = 0x207fffff
|
|
b44.vtx.append(coinbase)
|
|
b44.hashMerkleRoot = b44.calc_merkle_root()
|
|
b44.solve()
|
|
self.tip = b44
|
|
self.block_heights[b44.sha256] = height
|
|
self.blocks[44] = b44
|
|
self.send_blocks([b44], True)
|
|
|
|
self.log.info("Reject a block with a non-coinbase as the first tx")
|
|
non_coinbase = self.create_tx(out[15], 0, 1)
|
|
b45 = CBlock()
|
|
b45.nTime = self.tip.nTime + 1
|
|
b45.hashPrevBlock = self.tip.sha256
|
|
b45.nBits = 0x207fffff
|
|
b45.vtx.append(non_coinbase)
|
|
b45.hashMerkleRoot = b45.calc_merkle_root()
|
|
b45.calc_sha256()
|
|
b45.solve()
|
|
self.block_heights[b45.sha256] = self.block_heights[self.tip.sha256] + 1
|
|
self.tip = b45
|
|
self.blocks[45] = b45
|
|
self.send_blocks([b45], success=False, reject_reason='bad-cb-missing', reconnect=True)
|
|
|
|
self.log.info("Reject a block with no transactions")
|
|
self.move_tip(44)
|
|
b46 = CBlock()
|
|
b46.nTime = b44.nTime + 1
|
|
b46.hashPrevBlock = b44.sha256
|
|
b46.nBits = 0x207fffff
|
|
b46.vtx = []
|
|
b46.hashMerkleRoot = 0
|
|
b46.solve()
|
|
self.block_heights[b46.sha256] = self.block_heights[b44.sha256] + 1
|
|
self.tip = b46
|
|
assert 46 not in self.blocks
|
|
self.blocks[46] = b46
|
|
self.send_blocks([b46], success=False, reject_reason='bad-blk-length', reconnect=True)
|
|
|
|
self.log.info("Reject a block with invalid work")
|
|
self.move_tip(44)
|
|
b47 = self.next_block(47)
|
|
target = uint256_from_compact(b47.nBits)
|
|
while b47.sha256 <= target:
|
|
# Rehash nonces until an invalid too-high-hash block is found.
|
|
b47.nNonce += 1
|
|
b47.rehash()
|
|
self.send_blocks([b47], False, force_send=True, reject_reason='high-hash', reconnect=True)
|
|
|
|
self.log.info("Reject a block with a timestamp >2 hours in the future")
|
|
self.move_tip(44)
|
|
b48 = self.next_block(48)
|
|
b48.nTime = int(time.time()) + 60 * 60 * 3
|
|
# Header timestamp has changed. Re-solve the block.
|
|
b48.solve()
|
|
self.send_blocks([b48], False, force_send=True, reject_reason='time-too-new')
|
|
|
|
self.log.info("Reject a block with invalid merkle hash")
|
|
self.move_tip(44)
|
|
b49 = self.next_block(49)
|
|
b49.hashMerkleRoot += 1
|
|
b49.solve()
|
|
self.send_blocks([b49], success=False, reject_reason='bad-txnmrklroot', reconnect=True)
|
|
|
|
self.log.info("Reject a block with incorrect POW limit")
|
|
self.move_tip(44)
|
|
b50 = self.next_block(50)
|
|
b50.nBits = b50.nBits - 1
|
|
b50.solve()
|
|
self.send_blocks([b50], False, force_send=True, reject_reason='bad-diffbits', reconnect=True)
|
|
|
|
self.log.info("Reject a block with two coinbase transactions")
|
|
self.move_tip(44)
|
|
b51 = self.next_block(51)
|
|
cb2 = create_coinbase(51, self.coinbase_pubkey)
|
|
b51 = self.update_block(51, [cb2])
|
|
self.send_blocks([b51], success=False, reject_reason='bad-cb-multiple', reconnect=True)
|
|
|
|
self.log.info("Reject a block with duplicate transactions")
|
|
# Note: txns have to be in the right position in the merkle tree to trigger this error
|
|
self.move_tip(44)
|
|
b52 = self.next_block(52, spend=out[15])
|
|
tx = self.create_tx(b52.vtx[1], 0, 1)
|
|
b52 = self.update_block(52, [tx, tx])
|
|
self.send_blocks([b52], success=False, reject_reason='bad-txns-duplicate', reconnect=True)
|
|
|
|
# Test block timestamps
|
|
# -> b31 (8) -> b33 (9) -> b35 (10) -> b39 (11) -> b42 (12) -> b43 (13) -> b53 (14) -> b55 (15)
|
|
# \-> b54 (15)
|
|
#
|
|
self.move_tip(43)
|
|
b53 = self.next_block(53, spend=out[14])
|
|
self.send_blocks([b53], False)
|
|
self.save_spendable_output()
|
|
|
|
self.log.info("Reject a block with timestamp before MedianTimePast")
|
|
b54 = self.next_block(54, spend=out[15])
|
|
b54.nTime = b35.nTime - 1
|
|
b54.solve()
|
|
self.send_blocks([b54], False, force_send=True, reject_reason='time-too-old', reconnect=True)
|
|
|
|
# valid timestamp
|
|
self.move_tip(53)
|
|
b55 = self.next_block(55, spend=out[15])
|
|
b55.nTime = b35.nTime
|
|
self.update_block(55, [])
|
|
self.send_blocks([b55], True)
|
|
self.save_spendable_output()
|
|
|
|
# Test Merkle tree malleability
|
|
#
|
|
# -> b42 (12) -> b43 (13) -> b53 (14) -> b55 (15) -> b57p2 (16)
|
|
# \-> b57 (16)
|
|
# \-> b56p2 (16)
|
|
# \-> b56 (16)
|
|
#
|
|
# Merkle tree malleability (CVE-2012-2459): repeating sequences of transactions in a block without
|
|
# affecting the merkle root of a block, while still invalidating it.
|
|
# See: src/consensus/merkle.h
|
|
#
|
|
# b57 has three txns: coinbase, tx, tx1. The merkle root computation will duplicate tx.
|
|
# Result: OK
|
|
#
|
|
# b56 copies b57 but duplicates tx1 and does not recalculate the block hash. So it has a valid merkle
|
|
# root but duplicate transactions.
|
|
# Result: Fails
|
|
#
|
|
# b57p2 has six transactions in its merkle tree:
|
|
# - coinbase, tx, tx1, tx2, tx3, tx4
|
|
# Merkle root calculation will duplicate as necessary.
|
|
# Result: OK.
|
|
#
|
|
# b56p2 copies b57p2 but adds both tx3 and tx4. The purpose of the test is to make sure the code catches
|
|
# duplicate txns that are not next to one another with the "bad-txns-duplicate" error (which indicates
|
|
# that the error was caught early, avoiding a DOS vulnerability.)
|
|
|
|
# b57 - a good block with 2 txs, don't submit until end
|
|
self.move_tip(55)
|
|
b57 = self.next_block(57)
|
|
tx = self.create_and_sign_transaction(out[16], 1)
|
|
tx1 = self.create_tx(tx, 0, 1)
|
|
b57 = self.update_block(57, [tx, tx1])
|
|
|
|
# b56 - copy b57, add a duplicate tx
|
|
self.log.info("Reject a block with a duplicate transaction in the Merkle Tree (but with a valid Merkle Root)")
|
|
self.move_tip(55)
|
|
b56 = copy.deepcopy(b57)
|
|
self.blocks[56] = b56
|
|
assert_equal(len(b56.vtx), 3)
|
|
b56 = self.update_block(56, [tx1])
|
|
assert_equal(b56.hash, b57.hash)
|
|
self.send_blocks([b56], success=False, reject_reason='bad-txns-duplicate', reconnect=True)
|
|
|
|
# b57p2 - a good block with 6 tx'es, don't submit until end
|
|
self.move_tip(55)
|
|
b57p2 = self.next_block("57p2")
|
|
tx = self.create_and_sign_transaction(out[16], 1)
|
|
tx1 = self.create_tx(tx, 0, 1)
|
|
tx2 = self.create_tx(tx1, 0, 1)
|
|
tx3 = self.create_tx(tx2, 0, 1)
|
|
tx4 = self.create_tx(tx3, 0, 1)
|
|
b57p2 = self.update_block("57p2", [tx, tx1, tx2, tx3, tx4])
|
|
|
|
# b56p2 - copy b57p2, duplicate two non-consecutive tx's
|
|
self.log.info("Reject a block with two duplicate transactions in the Merkle Tree (but with a valid Merkle Root)")
|
|
self.move_tip(55)
|
|
b56p2 = copy.deepcopy(b57p2)
|
|
self.blocks["b56p2"] = b56p2
|
|
assert_equal(b56p2.hash, b57p2.hash)
|
|
assert_equal(len(b56p2.vtx), 6)
|
|
b56p2 = self.update_block("b56p2", [tx3, tx4])
|
|
self.send_blocks([b56p2], success=False, reject_reason='bad-txns-duplicate', reconnect=True)
|
|
|
|
self.move_tip("57p2")
|
|
self.send_blocks([b57p2], True)
|
|
|
|
self.move_tip(57)
|
|
self.send_blocks([b57], False) # The tip is not updated because 57p2 seen first
|
|
self.save_spendable_output()
|
|
|
|
# Test a few invalid tx types
|
|
#
|
|
# -> b35 (10) -> b39 (11) -> b42 (12) -> b43 (13) -> b53 (14) -> b55 (15) -> b57 (16) -> b60 ()
|
|
# \-> ??? (17)
|
|
#
|
|
|
|
# tx with prevout.n out of range
|
|
self.log.info("Reject a block with a transaction with prevout.n out of range")
|
|
self.move_tip(57)
|
|
b58 = self.next_block(58, spend=out[17])
|
|
tx = CTransaction()
|
|
assert len(out[17].vout) < 42
|
|
tx.vin.append(CTxIn(COutPoint(out[17].sha256, 42), CScript([OP_TRUE]), 0xffffffff))
|
|
tx.vout.append(CTxOut(0, b""))
|
|
tx.calc_sha256()
|
|
b58 = self.update_block(58, [tx])
|
|
self.send_blocks([b58], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
|
|
|
|
# tx with output value > input value
|
|
self.log.info("Reject a block with a transaction with outputs > inputs")
|
|
self.move_tip(57)
|
|
b59 = self.next_block(59)
|
|
tx = self.create_and_sign_transaction(out[17], 51 * COIN)
|
|
b59 = self.update_block(59, [tx])
|
|
self.send_blocks([b59], success=False, reject_reason='bad-txns-in-belowout', reconnect=True)
|
|
|
|
# reset to good chain
|
|
self.move_tip(57)
|
|
b60 = self.next_block(60)
|
|
self.send_blocks([b60], True)
|
|
self.save_spendable_output()
|
|
|
|
# Test BIP30 (reject duplicate)
|
|
#
|
|
# -> b39 (11) -> b42 (12) -> b43 (13) -> b53 (14) -> b55 (15) -> b57 (16) -> b60 ()
|
|
# \-> b61 ()
|
|
#
|
|
# Blocks are not allowed to contain a transaction whose id matches that of an earlier,
|
|
# not-fully-spent transaction in the same chain. To test, make identical coinbases;
|
|
# the second one should be rejected. See also CVE-2012-1909.
|
|
#
|
|
self.log.info("Reject a block with a transaction with a duplicate hash of a previous transaction (BIP30)")
|
|
self.move_tip(60)
|
|
b61 = self.next_block(61)
|
|
b61.vtx[0].vin[0].scriptSig = DUPLICATE_COINBASE_SCRIPT_SIG
|
|
b61.vtx[0].rehash()
|
|
b61 = self.update_block(61, [])
|
|
assert_equal(duplicate_tx.serialize(), b61.vtx[0].serialize())
|
|
self.send_blocks([b61], success=False, reject_reason='bad-txns-BIP30', reconnect=True)
|
|
|
|
# Test BIP30 (allow duplicate if spent)
|
|
#
|
|
# -> b57 (16) -> b60 ()
|
|
# \-> b_spend_dup_cb (b_dup_cb) -> b_dup_2 ()
|
|
#
|
|
self.move_tip(57)
|
|
b_spend_dup_cb = self.next_block('spend_dup_cb')
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(duplicate_tx.sha256, 0)))
|
|
tx.vout.append(CTxOut(0, CScript([OP_TRUE])))
|
|
self.sign_tx(tx, duplicate_tx)
|
|
tx.rehash()
|
|
b_spend_dup_cb = self.update_block('spend_dup_cb', [tx])
|
|
|
|
b_dup_2 = self.next_block('dup_2')
|
|
b_dup_2.vtx[0].vin[0].scriptSig = DUPLICATE_COINBASE_SCRIPT_SIG
|
|
b_dup_2.vtx[0].rehash()
|
|
b_dup_2 = self.update_block('dup_2', [])
|
|
assert_equal(duplicate_tx.serialize(), b_dup_2.vtx[0].serialize())
|
|
assert_equal(self.nodes[0].gettxout(txid=duplicate_tx.hash, n=0)['confirmations'], 119)
|
|
self.send_blocks([b_spend_dup_cb, b_dup_2], success=True)
|
|
# The duplicate has less confirmations
|
|
assert_equal(self.nodes[0].gettxout(txid=duplicate_tx.hash, n=0)['confirmations'], 1)
|
|
|
|
# Test tx.isFinal is properly rejected (not an exhaustive tx.isFinal test, that should be in data-driven transaction tests)
|
|
#
|
|
# -> b_spend_dup_cb (b_dup_cb) -> b_dup_2 ()
|
|
# \-> b62 (18)
|
|
#
|
|
self.log.info("Reject a block with a transaction with a nonfinal locktime")
|
|
self.move_tip('dup_2')
|
|
b62 = self.next_block(62)
|
|
tx = CTransaction()
|
|
tx.nLockTime = 0xffffffff # this locktime is non-final
|
|
tx.vin.append(CTxIn(COutPoint(out[18].sha256, 0))) # don't set nSequence
|
|
tx.vout.append(CTxOut(0, CScript([OP_TRUE])))
|
|
assert tx.vin[0].nSequence < 0xffffffff
|
|
tx.calc_sha256()
|
|
b62 = self.update_block(62, [tx])
|
|
self.send_blocks([b62], success=False, reject_reason='bad-txns-nonfinal', reconnect=True)
|
|
|
|
# Test a non-final coinbase is also rejected
|
|
#
|
|
# -> b_spend_dup_cb (b_dup_cb) -> b_dup_2 ()
|
|
# \-> b63 (-)
|
|
#
|
|
self.log.info("Reject a block with a coinbase transaction with a nonfinal locktime")
|
|
self.move_tip('dup_2')
|
|
b63 = self.next_block(63)
|
|
b63.vtx[0].nLockTime = 0xffffffff
|
|
b63.vtx[0].vin[0].nSequence = 0xDEADBEEF
|
|
b63.vtx[0].rehash()
|
|
b63 = self.update_block(63, [])
|
|
self.send_blocks([b63], success=False, reject_reason='bad-txns-nonfinal', reconnect=True)
|
|
|
|
# This checks that a block with a bloated VARINT between the block_header and the array of tx such that
|
|
# the block is > MAX_BLOCK_BASE_SIZE with the bloated varint, but <= MAX_BLOCK_BASE_SIZE without the bloated varint,
|
|
# does not cause a subsequent, identical block with canonical encoding to be rejected. The test does not
|
|
# care whether the bloated block is accepted or rejected; it only cares that the second block is accepted.
|
|
#
|
|
# What matters is that the receiving node should not reject the bloated block, and then reject the canonical
|
|
# block on the basis that it's the same as an already-rejected block (which would be a consensus failure.)
|
|
#
|
|
# -> b_spend_dup_cb (b_dup_cb) -> b_dup_2 () -> b64 (18)
|
|
# \
|
|
# b64a (18)
|
|
# b64a is a bloated block (non-canonical varint)
|
|
# b64 is a good block (same as b64 but w/ canonical varint)
|
|
#
|
|
self.log.info("Accept a valid block even if a bloated version of the block has previously been sent")
|
|
self.move_tip('dup_2')
|
|
regular_block = self.next_block("64a", spend=out[18])
|
|
|
|
# make it a "broken_block," with non-canonical serialization
|
|
b64a = CBrokenBlock(regular_block)
|
|
b64a.initialize(regular_block)
|
|
self.blocks["64a"] = b64a
|
|
self.tip = b64a
|
|
tx = CTransaction()
|
|
|
|
# use canonical serialization to calculate size
|
|
script_length = MAX_BLOCK_BASE_SIZE - len(b64a.normal_serialize()) - 69
|
|
script_output = CScript([b'\x00' * script_length])
|
|
tx.vout.append(CTxOut(0, script_output))
|
|
tx.vin.append(CTxIn(COutPoint(b64a.vtx[1].sha256, 0)))
|
|
b64a = self.update_block("64a", [tx])
|
|
assert_equal(len(b64a.serialize()), MAX_BLOCK_BASE_SIZE + 8)
|
|
self.send_blocks([b64a], success=False, reject_reason='non-canonical ReadCompactSize()')
|
|
|
|
# bitcoind doesn't disconnect us for sending a bloated block, but if we subsequently
|
|
# resend the header message, it won't send us the getdata message again. Just
|
|
# disconnect and reconnect and then call sync_blocks.
|
|
# TODO: improve this test to be less dependent on P2P DOS behaviour.
|
|
node.disconnect_p2ps()
|
|
self.reconnect_p2p()
|
|
|
|
self.move_tip('dup_2')
|
|
b64 = CBlock(b64a)
|
|
b64.vtx = copy.deepcopy(b64a.vtx)
|
|
assert_equal(b64.hash, b64a.hash)
|
|
assert_equal(len(b64.serialize()), MAX_BLOCK_BASE_SIZE)
|
|
self.blocks[64] = b64
|
|
b64 = self.update_block(64, [])
|
|
self.send_blocks([b64], True)
|
|
self.save_spendable_output()
|
|
|
|
# Spend an output created in the block itself
|
|
#
|
|
# -> b_dup_2 () -> b64 (18) -> b65 (19)
|
|
#
|
|
self.log.info("Accept a block with a transaction spending an output created in the same block")
|
|
self.move_tip(64)
|
|
b65 = self.next_block(65)
|
|
tx1 = self.create_and_sign_transaction(out[19], out[19].vout[0].nValue)
|
|
tx2 = self.create_and_sign_transaction(tx1, 0)
|
|
b65 = self.update_block(65, [tx1, tx2])
|
|
self.send_blocks([b65], True)
|
|
self.save_spendable_output()
|
|
|
|
# Attempt to spend an output created later in the same block
|
|
#
|
|
# -> b64 (18) -> b65 (19)
|
|
# \-> b66 (20)
|
|
self.log.info("Reject a block with a transaction spending an output created later in the same block")
|
|
self.move_tip(65)
|
|
b66 = self.next_block(66)
|
|
tx1 = self.create_and_sign_transaction(out[20], out[20].vout[0].nValue)
|
|
tx2 = self.create_and_sign_transaction(tx1, 1)
|
|
b66 = self.update_block(66, [tx2, tx1])
|
|
self.send_blocks([b66], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
|
|
|
|
# Attempt to double-spend a transaction created in a block
|
|
#
|
|
# -> b64 (18) -> b65 (19)
|
|
# \-> b67 (20)
|
|
#
|
|
#
|
|
self.log.info("Reject a block with a transaction double spending a transaction created in the same block")
|
|
self.move_tip(65)
|
|
b67 = self.next_block(67)
|
|
tx1 = self.create_and_sign_transaction(out[20], out[20].vout[0].nValue)
|
|
tx2 = self.create_and_sign_transaction(tx1, 1)
|
|
tx3 = self.create_and_sign_transaction(tx1, 2)
|
|
b67 = self.update_block(67, [tx1, tx2, tx3])
|
|
self.send_blocks([b67], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
|
|
|
|
# More tests of block subsidy
|
|
#
|
|
# -> b64 (18) -> b65 (19) -> b69 (20)
|
|
# \-> b68 (20)
|
|
#
|
|
# b68 - coinbase with an extra 10 satoshis,
|
|
# creates a tx that has 9 satoshis from out[20] go to fees
|
|
# this fails because the coinbase is trying to claim 1 satoshi too much in fees
|
|
#
|
|
# b69 - coinbase with extra 10 satoshis, and a tx that gives a 10 satoshi fee
|
|
# this succeeds
|
|
#
|
|
self.log.info("Reject a block trying to claim too much subsidy in the coinbase transaction")
|
|
self.move_tip(65)
|
|
b68 = self.next_block(68, additional_coinbase_value=10)
|
|
tx = self.create_and_sign_transaction(out[20], out[20].vout[0].nValue - 9)
|
|
b68 = self.update_block(68, [tx])
|
|
self.send_blocks([b68], success=False, reject_reason='bad-cb-amount', reconnect=True)
|
|
|
|
self.log.info("Accept a block claiming the correct subsidy in the coinbase transaction")
|
|
self.move_tip(65)
|
|
b69 = self.next_block(69, additional_coinbase_value=10)
|
|
tx = self.create_and_sign_transaction(out[20], out[20].vout[0].nValue - 10)
|
|
self.update_block(69, [tx])
|
|
self.send_blocks([b69], True)
|
|
self.save_spendable_output()
|
|
|
|
# Test spending the outpoint of a non-existent transaction
|
|
#
|
|
# -> b65 (19) -> b69 (20)
|
|
# \-> b70 (21)
|
|
#
|
|
self.log.info("Reject a block containing a transaction spending from a non-existent input")
|
|
self.move_tip(69)
|
|
b70 = self.next_block(70, spend=out[21])
|
|
bogus_tx = CTransaction()
|
|
bogus_tx.sha256 = uint256_from_str(b"23c70ed7c0506e9178fc1a987f40a33946d4ad4c962b5ae3a52546da53af0c5c")
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(bogus_tx.sha256, 0), b"", 0xffffffff))
|
|
tx.vout.append(CTxOut(1, b""))
|
|
b70 = self.update_block(70, [tx])
|
|
self.send_blocks([b70], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
|
|
|
|
# Test accepting an invalid block which has the same hash as a valid one (via merkle tree tricks)
|
|
#
|
|
# -> b65 (19) -> b69 (20) -> b72 (21)
|
|
# \-> b71 (21)
|
|
#
|
|
# b72 is a good block.
|
|
# b71 is a copy of 72, but re-adds one of its transactions. However, it has the same hash as b72.
|
|
self.log.info("Reject a block containing a duplicate transaction but with the same Merkle root (Merkle tree malleability")
|
|
self.move_tip(69)
|
|
b72 = self.next_block(72)
|
|
tx1 = self.create_and_sign_transaction(out[21], 2)
|
|
tx2 = self.create_and_sign_transaction(tx1, 1)
|
|
b72 = self.update_block(72, [tx1, tx2]) # now tip is 72
|
|
b71 = copy.deepcopy(b72)
|
|
b71.vtx.append(tx2) # add duplicate tx2
|
|
self.block_heights[b71.sha256] = self.block_heights[b69.sha256] + 1 # b71 builds off b69
|
|
self.blocks[71] = b71
|
|
|
|
assert_equal(len(b71.vtx), 4)
|
|
assert_equal(len(b72.vtx), 3)
|
|
assert_equal(b72.sha256, b71.sha256)
|
|
|
|
self.move_tip(71)
|
|
self.send_blocks([b71], success=False, reject_reason='bad-txns-duplicate', reconnect=True)
|
|
|
|
self.move_tip(72)
|
|
self.send_blocks([b72], True)
|
|
self.save_spendable_output()
|
|
|
|
# Test some invalid scripts and MAX_BLOCK_SIGOPS
|
|
#
|
|
# -> b69 (20) -> b72 (21)
|
|
# \-> b** (22)
|
|
#
|
|
|
|
# b73 - tx with excessive sigops that are placed after an excessively large script element.
|
|
# The purpose of the test is to make sure those sigops are counted.
|
|
#
|
|
# script is a bytearray of size 20,526
|
|
#
|
|
# bytearray[0-19,998] : OP_CHECKSIG
|
|
# bytearray[19,999] : OP_PUSHDATA4
|
|
# bytearray[20,000-20,003]: 521 (max_script_element_size+1, in little-endian format)
|
|
# bytearray[20,004-20,525]: unread data (script_element)
|
|
# bytearray[20,526] : OP_CHECKSIG (this puts us over the limit)
|
|
self.log.info("Reject a block containing too many sigops after a large script element")
|
|
self.move_tip(72)
|
|
b73 = self.next_block(73)
|
|
size = MAX_BLOCK_SIGOPS - 1 + MAX_SCRIPT_ELEMENT_SIZE + 1 + 5 + 1
|
|
a = bytearray([OP_CHECKSIG] * size)
|
|
a[MAX_BLOCK_SIGOPS - 1] = int("4e", 16) # OP_PUSHDATA4
|
|
|
|
element_size = MAX_SCRIPT_ELEMENT_SIZE + 1
|
|
a[MAX_BLOCK_SIGOPS] = element_size % 256
|
|
a[MAX_BLOCK_SIGOPS + 1] = element_size // 256
|
|
a[MAX_BLOCK_SIGOPS + 2] = 0
|
|
a[MAX_BLOCK_SIGOPS + 3] = 0
|
|
|
|
tx = self.create_and_sign_transaction(out[22], 1, CScript(a))
|
|
b73 = self.update_block(73, [tx])
|
|
assert_equal(get_legacy_sigopcount_block(b73), MAX_BLOCK_SIGOPS + 1)
|
|
self.send_blocks([b73], success=False, reject_reason='bad-blk-sigops', reconnect=True)
|
|
|
|
# b74/75 - if we push an invalid script element, all previous sigops are counted,
|
|
# but sigops after the element are not counted.
|
|
#
|
|
# The invalid script element is that the push_data indicates that
|
|
# there will be a large amount of data (0xffffff bytes), but we only
|
|
# provide a much smaller number. These bytes are CHECKSIGS so they would
|
|
# cause b75 to fail for excessive sigops, if those bytes were counted.
|
|
#
|
|
# b74 fails because we put MAX_BLOCK_SIGOPS+1 before the element
|
|
# b75 succeeds because we put MAX_BLOCK_SIGOPS before the element
|
|
self.log.info("Check sigops are counted correctly after an invalid script element")
|
|
self.move_tip(72)
|
|
b74 = self.next_block(74)
|
|
size = MAX_BLOCK_SIGOPS - 1 + MAX_SCRIPT_ELEMENT_SIZE + 42 # total = 20,561
|
|
a = bytearray([OP_CHECKSIG] * size)
|
|
a[MAX_BLOCK_SIGOPS] = 0x4e
|
|
a[MAX_BLOCK_SIGOPS + 1] = 0xfe
|
|
a[MAX_BLOCK_SIGOPS + 2] = 0xff
|
|
a[MAX_BLOCK_SIGOPS + 3] = 0xff
|
|
a[MAX_BLOCK_SIGOPS + 4] = 0xff
|
|
tx = self.create_and_sign_transaction(out[22], 1, CScript(a))
|
|
b74 = self.update_block(74, [tx])
|
|
self.send_blocks([b74], success=False, reject_reason='bad-blk-sigops', reconnect=True)
|
|
|
|
self.move_tip(72)
|
|
b75 = self.next_block(75)
|
|
size = MAX_BLOCK_SIGOPS - 1 + MAX_SCRIPT_ELEMENT_SIZE + 42
|
|
a = bytearray([OP_CHECKSIG] * size)
|
|
a[MAX_BLOCK_SIGOPS - 1] = 0x4e
|
|
a[MAX_BLOCK_SIGOPS] = 0xff
|
|
a[MAX_BLOCK_SIGOPS + 1] = 0xff
|
|
a[MAX_BLOCK_SIGOPS + 2] = 0xff
|
|
a[MAX_BLOCK_SIGOPS + 3] = 0xff
|
|
tx = self.create_and_sign_transaction(out[22], 1, CScript(a))
|
|
b75 = self.update_block(75, [tx])
|
|
self.send_blocks([b75], True)
|
|
self.save_spendable_output()
|
|
|
|
# Check that if we push an element filled with CHECKSIGs, they are not counted
|
|
self.move_tip(75)
|
|
b76 = self.next_block(76)
|
|
size = MAX_BLOCK_SIGOPS - 1 + MAX_SCRIPT_ELEMENT_SIZE + 1 + 5
|
|
a = bytearray([OP_CHECKSIG] * size)
|
|
a[MAX_BLOCK_SIGOPS - 1] = 0x4e # PUSHDATA4, but leave the following bytes as just checksigs
|
|
tx = self.create_and_sign_transaction(out[23], 1, CScript(a))
|
|
b76 = self.update_block(76, [tx])
|
|
self.send_blocks([b76], True)
|
|
self.save_spendable_output()
|
|
|
|
# Test transaction resurrection
|
|
#
|
|
# -> b77 (24) -> b78 (25) -> b79 (26)
|
|
# \-> b80 (25) -> b81 (26) -> b82 (27)
|
|
#
|
|
# b78 creates a tx, which is spent in b79. After b82, both should be in mempool
|
|
#
|
|
# The tx'es must be unsigned and pass the node's mempool policy. It is unsigned for the
|
|
# rather obscure reason that the Python signature code does not distinguish between
|
|
# Low-S and High-S values (whereas the bitcoin code has custom code which does so);
|
|
# as a result of which, the odds are 50% that the python code will use the right
|
|
# value and the transaction will be accepted into the mempool. Until we modify the
|
|
# test framework to support low-S signing, we are out of luck.
|
|
#
|
|
# To get around this issue, we construct transactions which are not signed and which
|
|
# spend to OP_TRUE. If the standard-ness rules change, this test would need to be
|
|
# updated. (Perhaps to spend to a P2SH OP_TRUE script)
|
|
self.log.info("Test transaction resurrection during a re-org")
|
|
self.move_tip(76)
|
|
b77 = self.next_block(77)
|
|
tx77 = self.create_and_sign_transaction(out[24], 10 * COIN)
|
|
b77 = self.update_block(77, [tx77])
|
|
self.send_blocks([b77], True)
|
|
self.save_spendable_output()
|
|
|
|
b78 = self.next_block(78)
|
|
tx78 = self.create_tx(tx77, 0, 9 * COIN)
|
|
b78 = self.update_block(78, [tx78])
|
|
self.send_blocks([b78], True)
|
|
|
|
b79 = self.next_block(79)
|
|
tx79 = self.create_tx(tx78, 0, 8 * COIN)
|
|
b79 = self.update_block(79, [tx79])
|
|
self.send_blocks([b79], True)
|
|
|
|
# mempool should be empty
|
|
assert_equal(len(self.nodes[0].getrawmempool()), 0)
|
|
|
|
self.move_tip(77)
|
|
b80 = self.next_block(80, spend=out[25])
|
|
self.send_blocks([b80], False, force_send=True)
|
|
self.save_spendable_output()
|
|
|
|
b81 = self.next_block(81, spend=out[26])
|
|
self.send_blocks([b81], False, force_send=True) # other chain is same length
|
|
self.save_spendable_output()
|
|
|
|
b82 = self.next_block(82, spend=out[27])
|
|
self.send_blocks([b82], True) # now this chain is longer, triggers re-org
|
|
self.save_spendable_output()
|
|
|
|
# now check that tx78 and tx79 have been put back into the peer's mempool
|
|
mempool = self.nodes[0].getrawmempool()
|
|
assert_equal(len(mempool), 2)
|
|
assert tx78.hash in mempool
|
|
assert tx79.hash in mempool
|
|
|
|
# Test invalid opcodes in dead execution paths.
|
|
#
|
|
# -> b81 (26) -> b82 (27) -> b83 (28)
|
|
#
|
|
self.log.info("Accept a block with invalid opcodes in dead execution paths")
|
|
b83 = self.next_block(83)
|
|
op_codes = [OP_IF, OP_INVALIDOPCODE, OP_ELSE, OP_TRUE, OP_ENDIF]
|
|
script = CScript(op_codes)
|
|
tx1 = self.create_and_sign_transaction(out[28], out[28].vout[0].nValue, script)
|
|
|
|
tx2 = self.create_and_sign_transaction(tx1, 0, CScript([OP_TRUE]))
|
|
tx2.vin[0].scriptSig = CScript([OP_FALSE])
|
|
tx2.rehash()
|
|
|
|
b83 = self.update_block(83, [tx1, tx2])
|
|
self.send_blocks([b83], True)
|
|
self.save_spendable_output()
|
|
|
|
# Reorg on/off blocks that have OP_RETURN in them (and try to spend them)
|
|
#
|
|
# -> b81 (26) -> b82 (27) -> b83 (28) -> b84 (29) -> b87 (30) -> b88 (31)
|
|
# \-> b85 (29) -> b86 (30) \-> b89a (32)
|
|
#
|
|
self.log.info("Test re-orging blocks with OP_RETURN in them")
|
|
b84 = self.next_block(84)
|
|
tx1 = self.create_tx(out[29], 0, 0, CScript([OP_RETURN]))
|
|
tx1.vout.append(CTxOut(0, CScript([OP_TRUE])))
|
|
tx1.vout.append(CTxOut(0, CScript([OP_TRUE])))
|
|
tx1.vout.append(CTxOut(0, CScript([OP_TRUE])))
|
|
tx1.vout.append(CTxOut(0, CScript([OP_TRUE])))
|
|
tx1.calc_sha256()
|
|
self.sign_tx(tx1, out[29])
|
|
tx1.rehash()
|
|
tx2 = self.create_tx(tx1, 1, 0, CScript([OP_RETURN]))
|
|
tx2.vout.append(CTxOut(0, CScript([OP_RETURN])))
|
|
tx3 = self.create_tx(tx1, 2, 0, CScript([OP_RETURN]))
|
|
tx3.vout.append(CTxOut(0, CScript([OP_TRUE])))
|
|
tx4 = self.create_tx(tx1, 3, 0, CScript([OP_TRUE]))
|
|
tx4.vout.append(CTxOut(0, CScript([OP_RETURN])))
|
|
tx5 = self.create_tx(tx1, 4, 0, CScript([OP_RETURN]))
|
|
|
|
b84 = self.update_block(84, [tx1, tx2, tx3, tx4, tx5])
|
|
self.send_blocks([b84], True)
|
|
self.save_spendable_output()
|
|
|
|
self.move_tip(83)
|
|
b85 = self.next_block(85, spend=out[29])
|
|
self.send_blocks([b85], False) # other chain is same length
|
|
|
|
b86 = self.next_block(86, spend=out[30])
|
|
self.send_blocks([b86], True)
|
|
|
|
self.move_tip(84)
|
|
b87 = self.next_block(87, spend=out[30])
|
|
self.send_blocks([b87], False) # other chain is same length
|
|
self.save_spendable_output()
|
|
|
|
b88 = self.next_block(88, spend=out[31])
|
|
self.send_blocks([b88], True)
|
|
self.save_spendable_output()
|
|
|
|
# trying to spend the OP_RETURN output is rejected
|
|
b89a = self.next_block("89a", spend=out[32])
|
|
tx = self.create_tx(tx1, 0, 0, CScript([OP_TRUE]))
|
|
b89a = self.update_block("89a", [tx])
|
|
self.send_blocks([b89a], success=False, reject_reason='bad-txns-inputs-missingorspent', reconnect=True)
|
|
|
|
self.log.info("Test a re-org of one week's worth of blocks (1088 blocks)")
|
|
|
|
self.move_tip(88)
|
|
LARGE_REORG_SIZE = 1088
|
|
blocks = []
|
|
spend = out[32]
|
|
for i in range(89, LARGE_REORG_SIZE + 89):
|
|
b = self.next_block(i, spend)
|
|
tx = CTransaction()
|
|
script_length = MAX_BLOCK_BASE_SIZE - len(b.serialize()) - 69
|
|
script_output = CScript([b'\x00' * script_length])
|
|
tx.vout.append(CTxOut(0, script_output))
|
|
tx.vin.append(CTxIn(COutPoint(b.vtx[1].sha256, 0)))
|
|
b = self.update_block(i, [tx])
|
|
assert_equal(len(b.serialize()), MAX_BLOCK_BASE_SIZE)
|
|
blocks.append(b)
|
|
self.save_spendable_output()
|
|
spend = self.get_spendable_output()
|
|
|
|
self.send_blocks(blocks, True, timeout=2440)
|
|
chain1_tip = i
|
|
|
|
# now create alt chain of same length
|
|
self.move_tip(88)
|
|
blocks2 = []
|
|
for i in range(89, LARGE_REORG_SIZE + 89):
|
|
blocks2.append(self.next_block("alt" + str(i)))
|
|
self.send_blocks(blocks2, False, force_send=True)
|
|
|
|
# extend alt chain to trigger re-org
|
|
block = self.next_block("alt" + str(chain1_tip + 1))
|
|
self.send_blocks([block], True, timeout=2440)
|
|
|
|
# ... and re-org back to the first chain
|
|
self.move_tip(chain1_tip)
|
|
block = self.next_block(chain1_tip + 1)
|
|
self.send_blocks([block], False, force_send=True)
|
|
block = self.next_block(chain1_tip + 2)
|
|
self.send_blocks([block], True, timeout=2440)
|
|
|
|
self.log.info("Reject a block with an invalid block header version")
|
|
b_v1 = self.next_block('b_v1', version=1)
|
|
self.send_blocks([b_v1], success=False, force_send=True, reject_reason='bad-version(0x00000001)', reconnect=True)
|
|
|
|
self.move_tip(chain1_tip + 2)
|
|
b_cb34 = self.next_block('b_cb34')
|
|
b_cb34.vtx[0].vin[0].scriptSig = b_cb34.vtx[0].vin[0].scriptSig[:-1]
|
|
b_cb34.vtx[0].rehash()
|
|
b_cb34.hashMerkleRoot = b_cb34.calc_merkle_root()
|
|
b_cb34.solve()
|
|
self.send_blocks([b_cb34], success=False, reject_reason='bad-cb-height', reconnect=True)
|
|
|
|
# Helper methods
|
|
################
|
|
|
|
def add_transactions_to_block(self, block, tx_list):
|
|
[tx.rehash() for tx in tx_list]
|
|
block.vtx.extend(tx_list)
|
|
|
|
# this is a little handier to use than the version in blocktools.py
|
|
def create_tx(self, spend_tx, n, value, script=CScript([OP_TRUE, OP_DROP] * 15 + [OP_TRUE])):
|
|
return create_tx_with_script(spend_tx, n, amount=value, script_pub_key=script)
|
|
|
|
# sign a transaction, using the key we know about
|
|
# this signs input 0 in tx, which is assumed to be spending output n in spend_tx
|
|
def sign_tx(self, tx, spend_tx):
|
|
scriptPubKey = bytearray(spend_tx.vout[0].scriptPubKey)
|
|
if (scriptPubKey[0] == OP_TRUE): # an anyone-can-spend
|
|
tx.vin[0].scriptSig = CScript()
|
|
return
|
|
(sighash, err) = LegacySignatureHash(spend_tx.vout[0].scriptPubKey, tx, 0, SIGHASH_ALL)
|
|
tx.vin[0].scriptSig = CScript([self.coinbase_key.sign_ecdsa(sighash) + bytes(bytearray([SIGHASH_ALL]))])
|
|
|
|
def create_and_sign_transaction(self, spend_tx, value, script=CScript([OP_TRUE])):
|
|
tx = self.create_tx(spend_tx, 0, value, script)
|
|
self.sign_tx(tx, spend_tx)
|
|
tx.rehash()
|
|
return tx
|
|
|
|
def next_block(self, number, spend=None, additional_coinbase_value=0, script=CScript([OP_TRUE]), *, version=4):
|
|
if self.tip is None:
|
|
base_block_hash = self.genesis_hash
|
|
block_time = int(time.time()) + 1
|
|
else:
|
|
base_block_hash = self.tip.sha256
|
|
block_time = self.tip.nTime + 1
|
|
# First create the coinbase
|
|
height = self.block_heights[base_block_hash] + 1
|
|
coinbase = create_coinbase(height, self.coinbase_pubkey)
|
|
coinbase.vout[0].nValue += additional_coinbase_value
|
|
coinbase.rehash()
|
|
if spend is None:
|
|
block = create_block(base_block_hash, coinbase, block_time, version=version)
|
|
else:
|
|
coinbase.vout[0].nValue += spend.vout[0].nValue - 1 # all but one satoshi to fees
|
|
coinbase.rehash()
|
|
block = create_block(base_block_hash, coinbase, block_time, version=version)
|
|
tx = self.create_tx(spend, 0, 1, script) # spend 1 satoshi
|
|
self.sign_tx(tx, spend)
|
|
self.add_transactions_to_block(block, [tx])
|
|
block.hashMerkleRoot = block.calc_merkle_root()
|
|
# Block is created. Find a valid nonce.
|
|
block.solve()
|
|
self.tip = block
|
|
self.block_heights[block.sha256] = height
|
|
assert number not in self.blocks
|
|
self.blocks[number] = block
|
|
return block
|
|
|
|
# save the current tip so it can be spent by a later block
|
|
def save_spendable_output(self):
|
|
self.log.debug("saving spendable output %s" % self.tip.vtx[0])
|
|
self.spendable_outputs.append(self.tip)
|
|
|
|
# get an output that we previously marked as spendable
|
|
def get_spendable_output(self):
|
|
self.log.debug("getting spendable output %s" % self.spendable_outputs[0].vtx[0])
|
|
return self.spendable_outputs.pop(0).vtx[0]
|
|
|
|
# move the tip back to a previous block
|
|
def move_tip(self, number):
|
|
self.tip = self.blocks[number]
|
|
|
|
# adds transactions to the block and updates state
|
|
def update_block(self, block_number, new_transactions):
|
|
block = self.blocks[block_number]
|
|
self.add_transactions_to_block(block, new_transactions)
|
|
old_sha256 = block.sha256
|
|
block.hashMerkleRoot = block.calc_merkle_root()
|
|
block.solve()
|
|
# Update the internal state just like in next_block
|
|
self.tip = block
|
|
if block.sha256 != old_sha256:
|
|
self.block_heights[block.sha256] = self.block_heights[old_sha256]
|
|
del self.block_heights[old_sha256]
|
|
self.blocks[block_number] = block
|
|
return block
|
|
|
|
def bootstrap_p2p(self, timeout=10):
|
|
"""Add a P2P connection to the node.
|
|
|
|
Helper to connect and wait for version handshake."""
|
|
self.helper_peer = self.nodes[0].add_p2p_connection(P2PDataStore())
|
|
# We need to wait for the initial getheaders from the peer before we
|
|
# start populating our blockstore. If we don't, then we may run ahead
|
|
# to the next subtest before we receive the getheaders. We'd then send
|
|
# an INV for the next block and receive two getheaders - one for the
|
|
# IBD and one for the INV. We'd respond to both and could get
|
|
# unexpectedly disconnected if the DoS score for that error is 50.
|
|
self.helper_peer.wait_for_getheaders(timeout=timeout)
|
|
|
|
def reconnect_p2p(self, timeout=60):
|
|
"""Tear down and bootstrap the P2P connection to the node.
|
|
|
|
The node gets disconnected several times in this test. This helper
|
|
method reconnects the p2p and restarts the network thread."""
|
|
self.nodes[0].disconnect_p2ps()
|
|
self.bootstrap_p2p(timeout=timeout)
|
|
|
|
def send_blocks(self, blocks, success=True, reject_reason=None, force_send=False, reconnect=False, timeout=960):
|
|
"""Sends blocks to test node. Syncs and verifies that tip has advanced to most recent block.
|
|
|
|
Call with success = False if the tip shouldn't advance to the most recent block."""
|
|
self.helper_peer.send_blocks_and_test(blocks, self.nodes[0], success=success, reject_reason=reject_reason, force_send=force_send, timeout=timeout, expect_disconnect=reconnect)
|
|
|
|
if reconnect:
|
|
self.reconnect_p2p(timeout=timeout)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
FullBlockTest().main()
|