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205 lines
9.0 KiB
205 lines
9.0 KiB
#!/usr/bin/env python3
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# Copyright (c) 2014-2018 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 mining RPCs
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- getmininginfo
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- getblocktemplate proposal mode
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- submitblock"""
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import copy
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from decimal import Decimal
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from test_framework.blocktools import create_coinbase
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from test_framework.messages import (
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CBlock,
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CBlockHeader,
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)
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from test_framework.mininode import (
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P2PDataStore,
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)
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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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assert_raises_rpc_error,
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bytes_to_hex_str as b2x,
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)
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def assert_template(node, block, expect, rehash=True):
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if rehash:
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block.hashMerkleRoot = block.calc_merkle_root()
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rsp = node.getblocktemplate({'data': b2x(block.serialize()), 'mode': 'proposal'})
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assert_equal(rsp, expect)
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class MiningTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 2
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self.setup_clean_chain = False
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def run_test(self):
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node = self.nodes[0]
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self.log.info('getmininginfo')
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mining_info = node.getmininginfo()
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assert_equal(mining_info['blocks'], 200)
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assert_equal(mining_info['chain'], 'regtest')
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assert_equal(mining_info['currentblocktx'], 0)
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assert_equal(mining_info['currentblockweight'], 0)
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assert_equal(mining_info['difficulty'], Decimal('4.656542373906925E-10'))
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assert_equal(mining_info['networkhashps'], Decimal('0.003333333333333334'))
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assert_equal(mining_info['pooledtx'], 0)
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# Mine a block to leave initial block download
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node.generate(1)
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tmpl = node.getblocktemplate()
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self.log.info("getblocktemplate: Test capability advertised")
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assert 'proposal' in tmpl['capabilities']
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assert 'coinbasetxn' not in tmpl
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coinbase_tx = create_coinbase(height=int(tmpl["height"]) + 1)
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# sequence numbers must not be max for nLockTime to have effect
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coinbase_tx.vin[0].nSequence = 2 ** 32 - 2
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coinbase_tx.rehash()
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block = CBlock()
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block.nVersion = tmpl["version"]
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block.hashPrevBlock = int(tmpl["previousblockhash"], 16)
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block.nTime = tmpl["curtime"]
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block.nBits = int(tmpl["bits"], 16)
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block.nNonce = 0
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block.vtx = [coinbase_tx]
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self.log.info("getblocktemplate: Test valid block")
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assert_template(node, block, None)
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self.log.info("submitblock: Test block decode failure")
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assert_raises_rpc_error(-22, "Block decode failed", node.submitblock, b2x(block.serialize()[:-15]))
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self.log.info("getblocktemplate: Test bad input hash for coinbase transaction")
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bad_block = copy.deepcopy(block)
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bad_block.vtx[0].vin[0].prevout.hash += 1
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bad_block.vtx[0].rehash()
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assert_template(node, bad_block, 'bad-cb-missing')
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self.log.info("submitblock: Test invalid coinbase transaction")
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assert_raises_rpc_error(-22, "Block does not start with a coinbase", node.submitblock, b2x(bad_block.serialize()))
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self.log.info("getblocktemplate: Test truncated final transaction")
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assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(block.serialize()[:-1]), 'mode': 'proposal'})
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self.log.info("getblocktemplate: Test duplicate transaction")
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bad_block = copy.deepcopy(block)
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bad_block.vtx.append(bad_block.vtx[0])
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assert_template(node, bad_block, 'bad-txns-duplicate')
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self.log.info("getblocktemplate: Test invalid transaction")
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bad_block = copy.deepcopy(block)
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bad_tx = copy.deepcopy(bad_block.vtx[0])
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bad_tx.vin[0].prevout.hash = 255
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bad_tx.rehash()
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bad_block.vtx.append(bad_tx)
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assert_template(node, bad_block, 'bad-txns-inputs-missingorspent')
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self.log.info("getblocktemplate: Test nonfinal transaction")
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bad_block = copy.deepcopy(block)
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bad_block.vtx[0].nLockTime = 2 ** 32 - 1
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bad_block.vtx[0].rehash()
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assert_template(node, bad_block, 'bad-txns-nonfinal')
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self.log.info("getblocktemplate: Test bad tx count")
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# The tx count is immediately after the block header
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TX_COUNT_OFFSET = 80
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bad_block_sn = bytearray(block.serialize())
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assert_equal(bad_block_sn[TX_COUNT_OFFSET], 1)
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bad_block_sn[TX_COUNT_OFFSET] += 1
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assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(bad_block_sn), 'mode': 'proposal'})
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self.log.info("getblocktemplate: Test bad bits")
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bad_block = copy.deepcopy(block)
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bad_block.nBits = 469762303 # impossible in the real world
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assert_template(node, bad_block, 'bad-diffbits')
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self.log.info("getblocktemplate: Test bad merkle root")
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bad_block = copy.deepcopy(block)
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bad_block.hashMerkleRoot += 1
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assert_template(node, bad_block, 'bad-txnmrklroot', False)
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self.log.info("getblocktemplate: Test bad timestamps")
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bad_block = copy.deepcopy(block)
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bad_block.nTime = 2 ** 31 - 1
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assert_template(node, bad_block, 'time-too-new')
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bad_block.nTime = 0
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assert_template(node, bad_block, 'time-too-old')
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self.log.info("getblocktemplate: Test not best block")
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bad_block = copy.deepcopy(block)
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bad_block.hashPrevBlock = 123
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assert_template(node, bad_block, 'inconclusive-not-best-prevblk')
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self.log.info('submitheader tests')
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assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='xx' * 80))
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assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='ff' * 78))
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assert_raises_rpc_error(-25, 'Must submit previous header', lambda: node.submitheader(hexdata='ff' * 80))
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block.solve()
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def chain_tip(b_hash, *, status='headers-only', branchlen=1):
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return {'hash': b_hash, 'height': 202, 'branchlen': branchlen, 'status': status}
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assert chain_tip(block.hash) not in node.getchaintips()
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node.submitheader(hexdata=b2x(block.serialize()))
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assert chain_tip(block.hash) in node.getchaintips()
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node.submitheader(hexdata=b2x(CBlockHeader(block).serialize())) # Noop
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assert chain_tip(block.hash) in node.getchaintips()
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bad_block_root = copy.deepcopy(block)
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bad_block_root.hashMerkleRoot += 2
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bad_block_root.solve()
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assert chain_tip(bad_block_root.hash) not in node.getchaintips()
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node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
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assert chain_tip(bad_block_root.hash) in node.getchaintips()
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# Should still reject invalid blocks, even if we have the header:
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assert_equal(node.submitblock(hexdata=b2x(bad_block_root.serialize())), 'invalid')
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assert chain_tip(bad_block_root.hash) in node.getchaintips()
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# We know the header for this invalid block, so should just return early without error:
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node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
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assert chain_tip(bad_block_root.hash) in node.getchaintips()
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bad_block_lock = copy.deepcopy(block)
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bad_block_lock.vtx[0].nLockTime = 2**32 - 1
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bad_block_lock.vtx[0].rehash()
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bad_block_lock.hashMerkleRoot = bad_block_lock.calc_merkle_root()
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bad_block_lock.solve()
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assert_equal(node.submitblock(hexdata=b2x(bad_block_lock.serialize())), 'invalid')
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# Build a "good" block on top of the submitted bad block
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bad_block2 = copy.deepcopy(block)
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bad_block2.hashPrevBlock = bad_block_lock.sha256
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bad_block2.solve()
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assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block2).serialize())))
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# Should reject invalid header right away
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bad_block_time = copy.deepcopy(block)
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bad_block_time.nTime = 1
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bad_block_time.solve()
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assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block_time).serialize())))
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# Should ask for the block from a p2p node, if they announce the header as well:
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node.add_p2p_connection(P2PDataStore())
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node.p2p.wait_for_getheaders(timeout=5) # Drop the first getheaders
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node.p2p.send_blocks_and_test(blocks=[block], node=node)
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# Must be active now:
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assert chain_tip(block.hash, status='active', branchlen=0) in node.getchaintips()
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# Building a few blocks should give the same results
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node.generate(10)
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assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block_time).serialize())))
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assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block2).serialize())))
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node.submitheader(hexdata=b2x(CBlockHeader(block).serialize()))
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node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
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if __name__ == '__main__':
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MiningTest().main()
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