Differential D1194 Diff 3279 test/functional/monolith-opcodes.py

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test/functional/monolith-opcodes.py

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				#!/usr/bin/env python3
				# Copyright (c) 2015-2016 The Bitcoin Core developers
				# Copyright (c) 2017-2018 The Bitcoin developers
				# Distributed under the MIT software license, see the accompanying
				# file COPYING or http://www.opensource.org/licenses/mit-license.php.
				"""
				This test checks activation of opcodes and the different consensus
				related to this activation.
				"""

				from test_framework.test_framework import ComparisonTestFramework
				from test_framework.util import assert_equal, assert_raises_rpc_error
				from test_framework.comptool import TestManager, TestInstance, RejectResult
				from test_framework.blocktools import *
				import time
				from test_framework.key import CECKey
				from test_framework.script import *

				# far into the future
				MONOLITH_START_TIME = 2000000000

				# Error due to disabled opcode
				DISABLED_OPCODE_ERROR = b'mandatory-script-verify-flag-failed (Attempted to use a disabled opcode)'
				RPC_DISABLED_OPCODE_ERROR = "16: " + DISABLED_OPCODE_ERROR.decode("utf-8")


				class PreviousSpendableOutput(object):

				def __init__(self, tx=CTransaction(), n=-1):
				self.tx = tx
				self.n = n # the output we're spending


				class MonolithOpcodeTest(ComparisonTestFramework):

				def set_test_params(self):
				self.num_nodes = 1
				self.setup_clean_chain = True
				self.block_heights = {}
				self.tip = None
				self.blocks = {}
				self.extra_args = [
				['-whitelist=127.0.0.1', "-monolithactivationtime=%d" % MONOLITH_START_TIME]]

				def run_test(self):
				self.test = TestManager(self, self.options.tmpdir)
				self.test.add_all_connections(self.nodes)
				# Start up network handling in another thread
				NetworkThread().start()
				self.nodes[0].setmocktime(MONOLITH_START_TIME)
				self.test.run()

				def next_block(self, number):
				if self.tip == 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)
				coinbase.rehash()
				block = create_block(base_block_hash, coinbase, block_time)

				# Do PoW, which is cheap on regnet
				block.solve()
				self.tip = block
				self.block_heights[block.sha256] = height
				assert number not in self.blocks
				self.blocks[number] = block
				return block

				def get_tests(self):
				self.genesis_hash = int(self.nodes[0].getbestblockhash(), 16)
				self.block_heights[self.genesis_hash] = 0
				spendable_outputs = []

				# save the current tip so it can be spent by a later block
				def save_spendable_output():
				spendable_outputs.append(self.tip)

				# get an output that we previously marked as spendable
				def get_spendable_output():
				return PreviousSpendableOutput(spendable_outputs.pop(0).vtx[0], 0)

				# returns a test case that asserts that the current tip was accepted
				def accepted():
				return TestInstance([[self.tip, True]])

				# returns a test case that asserts that the current tip was rejected
				def rejected(reject=None):
				if reject is None:
				return TestInstance([[self.tip, False]])
				else:
				return TestInstance([[self.tip, reject]])

				# move the tip back to a previous block
				def tip(number):
				self.tip = self.blocks[number]

				# adds transactions to the block and updates state
				def update_block(block_number, new_transactions):
				[tx.rehash() for tx in new_transactions]
				block = self.blocks[block_number]
				block.vtx.extend(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

				# shorthand for functions
				block = self.next_block
				node = self.nodes[0]

				# Create a new block
				block(0)
				save_spendable_output()
				yield accepted()

				# Now we need that block to mature so we can spend the coinbase.
				test = TestInstance(sync_every_block=False)
				for i in range(99):
				block(5000 + i)
				test.blocks_and_transactions.append([self.tip, True])
				save_spendable_output()
				yield test

				# collect spendable outputs now to avoid cluttering the code later on
				out = []
				for i in range(100):
				out.append(get_spendable_output())

				# Generate a key pair to test P2SH sigops count
				private_key = CECKey()
				private_key.set_secretbytes(b"monolithopcodes")
				public_key = private_key.get_pubkey()

				# This is a little handier to use than the version in blocktools.py
				def create_fund_and_spend_tx(spend, scriptPubKey=[OP_TRUE], scriptSig=[]):
				# Fund transaction
				txfund = create_transaction(
				spend.tx, spend.n, b'', 50 * COIN, CScript(scriptPubKey))
				txfund.rehash()

				# Spend transaction
				txspend = CTransaction()
				txspend.vout.append(
				CTxOut(50 * COIN - 1000, CScript(scriptPubKey)))
				txspend.vin.append(CTxIn(COutPoint(txfund.sha256, 0), b''))

				txspend.vin[0].scriptSig = CScript(scriptSig)
				txspend.rehash()
				return [txfund, txspend]

				def send_transaction_to_mempool(tx):
				tx_id = node.sendrawtransaction(ToHex(tx))
				assert(tx_id in set(node.getrawmempool()))
				return tx_id

				def get_banscore():
				s = node.getpeerinfo()
				return s[0]['banscore']

				# Before monolith, normal tx can get in the mempool.
				txns = create_fund_and_spend_tx(out[0])
				send_transaction_to_mempool(txns[0])
				send_transaction_to_mempool(txns[1])

				# And they get mined in a block properly.
				block(1)
				update_block(1, txns)
				yield accepted()

				# transactions with the new opcodes are rejected.
				opand_txns = create_fund_and_spend_tx(out[1], [OP_AND], [0x01, 0x01])
				send_transaction_to_mempool(opand_txns[0])
				oldbs = get_banscore()
				assert_raises_rpc_error(-26, RPC_DISABLED_OPCODE_ERROR,
				node.sendrawtransaction, ToHex(opand_txns[1]))
				# check that ban score does not increase
				assert_equal(oldbs, get_banscore())

				# And block containing them are rejected as well.
				block(2)
				update_block(2, opand_txns)
				yield rejected(RejectResult(16, b'blk-bad-inputs'))
				# this should increase the banscore, invalid block
				assert(oldbs < get_banscore())

				# Rewind bad block
				tip(1)

				# Create a block that would activate monolith.
				schancelUnsubmitted Not Done Inline Actions Comment is wrong? schancel: Comment is wrong?
				bfork = block(5555)
				bfork.nTime = MONOLITH_START_TIME - 1
				update_block(5555, [])
				yield accepted()

				for i in range(5):
				block(5100 + i)
				test.blocks_and_transactions.append([self.tip, True])
				yield test

				# Check we are just before the activation time
				assert_equal(
				node.getblockheader(node.getbestblockhash())['mediantime'],
				MONOLITH_START_TIME - 1)

				# We are just before the fork, txns with new opcodes are still rejected
				assert_raises_rpc_error(-26, RPC_DISABLED_OPCODE_ERROR,
				node.sendrawtransaction, ToHex(opand_txns[1]))

				block(3)
				update_block(3, opand_txns)
				yield rejected(RejectResult(16, b'blk-bad-inputs'))

				# Rewind bad block
				tip(5104)

				# Activate monolith
				block(5556)
				yield accepted()

				# The re-enabled opcode transaction is now valid
				send_transaction_to_mempool(opand_txns[0])
				opand_txid = send_transaction_to_mempool(opand_txns[1])

				# They also can also be mined
				b5 = block(5)
				update_block(5, opand_txns)
				yield accepted()

				# Ok, now we check if a reorg work properly across the activation.
				postforkblockid = node.getbestblockhash()
				node.invalidateblock(postforkblockid)
				assert(opand_txid in set(node.getrawmempool()))

				# Deactivating monolith
				forkblockid = node.getbestblockhash()
				node.invalidateblock(forkblockid)
				assert(opand_txid not in set(node.getrawmempool()))

				# Check that we also do it properly on deeper reorg.
				node.reconsiderblock(forkblockid)
				node.reconsiderblock(postforkblockid)
				node.invalidateblock(forkblockid)
				assert(opand_txid not in set(node.getrawmempool()))


				if __name__ == '__main__':
				MonolithOpcodeTest().main()