def mine_large_blocks(node, n):
# Make a large scriptPubKey for the coinbase transaction. This is OP_RETURN
# followed by 950k of OP_NOP. This would be non-standard in a non-coinbase
# transaction but is consensus valid.
# Set the nTime if this is the first time this function has been called.
# A static variable ensures that time is monotonicly increasing and is therefore
# different for each block created => blockhash is unique.
if "nTimes" not in mine_large_blocks.__dict__:
mine_large_blocks.nTime = 0
# Get the block parameters for the first block
big_script = CScript([OP_RETURN] + [OP_NOP] * 950000)
best_block = node.getblock(node.getbestblockhash())
height = int(best_block["height"]) + 1
mine_large_blocks.nTime = max(mine_large_blocks.nTime, int(best_block["time"])) + 1
previousblockhash = int(best_block["hash"], 16)
for _ in range(n):
# Build the coinbase transaction (with large scriptPubKey)
coinbase_tx = create_coinbase(height)
coinbase_tx.vin[0].nSequence = 2 ** 32 - 1
coinbase_tx.vout[0].scriptPubKey = big_script
coinbase_tx.rehash()
# Build the block
block = CBlock()
block.nVersion = best_block["version"]
block.hashPrevBlock = previousblockhash
block.nTime = mine_large_blocks.nTime
block.nBits = int('207fffff', 16)
block.nNonce = 0
block.vtx = [coinbase_tx]
block.hashMerkleRoot = block.calc_merkle_root()
block.solve()
# Submit to the node
node.submitblock(ToHex(block))
previousblockhash = block.sha256
height += 1
mine_large_blocks.nTime += 1
def run_test(self):
self.mine_chain()
node = self.nodes[0]
def assert_submitblock(block, result_str_1, result_str_2=None):
block.solve()
result_str_2 = result_str_2 or 'duplicate-invalid'
assert_equal(result_str_1, node.submitblock(hexdata=block.serialize().hex()))
assert_equal(result_str_2, node.submitblock(hexdata=block.serialize().hex()))
self.log.info('getmininginfo')
mining_info = node.getmininginfo()
assert_equal(mining_info['blocks'], 200)
assert_equal(mining_info['chain'], 'regtest')
assert 'currentblocktx' not in mining_info
assert 'currentblockweight' not in mining_info
assert_equal(mining_info['difficulty'], Decimal('4.656542373906925E-10'))
assert_equal(mining_info['networkhashps'], Decimal('0.003333333333333334'))
assert_equal(mining_info['pooledtx'], 0)
# Mine a block to leave initial block download
node.generatetoaddress(1, node.get_deterministic_priv_key().address)
tmpl = node.getblocktemplate({'rules': ['segwit']})
self.log.info("getblocktemplate: Test capability advertised")
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl
next_height = int(tmpl["height"])
coinbase_tx = create_coinbase(height=next_height)
# sequence numbers must not be max for nLockTime to have effect
coinbase_tx.vin[0].nSequence = 2 ** 32 - 2
coinbase_tx.rehash()
# round-trip the encoded bip34 block height commitment
assert_equal(CScriptNum.decode(coinbase_tx.vin[0].scriptSig), next_height)
# round-trip negative and multi-byte CScriptNums to catch python regression
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(1500))), 1500)
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1500))), -1500)
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1))), -1)
block = CBlock()
block.nVersion = tmpl["version"]
block.hashPrevBlock = int(tmpl["previousblockhash"], 16)
block.nTime = tmpl["curtime"]
block.nBits = int(tmpl["bits"], 16)
block.nNonce = 0
block.vtx = [coinbase_tx]
self.log.info("getblocktemplate: segwit rule must be set")
assert_raises_rpc_error(-8, "getblocktemplate must be called with the segwit rule set", node.getblocktemplate)
self.log.info("getblocktemplate: Test valid block")
assert_template(node, block, None)
self.log.info("submitblock: Test block decode failure")
assert_raises_rpc_error(-22, "Block decode failed", node.submitblock, block.serialize()[:-15].hex())
self.log.info("getblocktemplate: Test bad input hash for coinbase transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].vin[0].prevout.hash += 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-cb-missing')
self.log.info("submitblock: Test invalid coinbase transaction")
assert_raises_rpc_error(-22, "Block does not start with a coinbase", node.submitblock, bad_block.serialize().hex())
self.log.info("getblocktemplate: Test truncated final transaction")
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': block.serialize()[:-1].hex(), 'mode': 'proposal', 'rules': ['segwit']})
self.log.info("getblocktemplate: Test duplicate transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx.append(bad_block.vtx[0])
assert_template(node, bad_block, 'bad-txns-duplicate')
assert_submitblock(bad_block, 'bad-txns-duplicate', 'bad-txns-duplicate')
self.log.info("getblocktemplate: Test invalid transaction")
bad_block = copy.deepcopy(block)
bad_tx = copy.deepcopy(bad_block.vtx[0])
bad_tx.vin[0].prevout.hash = 255
bad_tx.rehash()
bad_block.vtx.append(bad_tx)
assert_template(node, bad_block, 'bad-txns-inputs-missingorspent')
assert_submitblock(bad_block, 'bad-txns-inputs-missingorspent')
self.log.info("getblocktemplate: Test nonfinal transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].nLockTime = 2 ** 32 - 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-txns-nonfinal')
assert_submitblock(bad_block, 'bad-txns-nonfinal')
self.log.info("getblocktemplate: Test bad tx count")
# The tx count is immediately after the block header
bad_block_sn = bytearray(block.serialize())
assert_equal(bad_block_sn[BLOCK_HEADER_SIZE], 1)
bad_block_sn[BLOCK_HEADER_SIZE] += 1
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': bad_block_sn.hex(), 'mode': 'proposal', 'rules': ['segwit']})
self.log.info("getblocktemplate: Test bad bits")
bad_block = copy.deepcopy(block)
bad_block.nBits = 469762303 # impossible in the real world
assert_template(node, bad_block, 'bad-diffbits')
self.log.info("getblocktemplate: Test bad merkle root")
bad_block = copy.deepcopy(block)
bad_block.hashMerkleRoot += 1
assert_template(node, bad_block, 'bad-txnmrklroot', False)
assert_submitblock(bad_block, 'bad-txnmrklroot', 'bad-txnmrklroot')
self.log.info("getblocktemplate: Test bad timestamps")
bad_block = copy.deepcopy(block)
bad_block.nTime = 2 ** 31 - 1
assert_template(node, bad_block, 'time-too-new')
assert_submitblock(bad_block, 'time-too-new', 'time-too-new')
bad_block.nTime = 0
assert_template(node, bad_block, 'time-too-old')
assert_submitblock(bad_block, 'time-too-old', 'time-too-old')
self.log.info("getblocktemplate: Test not best block")
bad_block = copy.deepcopy(block)
bad_block.hashPrevBlock = 123
assert_template(node, bad_block, 'inconclusive-not-best-prevblk')
assert_submitblock(bad_block, 'prev-blk-not-found', 'prev-blk-not-found')
self.log.info('submitheader tests')
assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='xx' * BLOCK_HEADER_SIZE))
assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='ff' * (BLOCK_HEADER_SIZE-2)))
assert_raises_rpc_error(-25, 'Must submit previous header', lambda: node.submitheader(hexdata=super(CBlock, bad_block).serialize().hex()))
block.nTime += 1
block.solve()
def chain_tip(b_hash, *, status='headers-only', branchlen=1):
return {'hash': b_hash, 'height': 202, 'branchlen': branchlen, 'status': status}
assert chain_tip(block.hash) not in node.getchaintips()
node.submitheader(hexdata=block.serialize().hex())
assert chain_tip(block.hash) in node.getchaintips()
node.submitheader(hexdata=CBlockHeader(block).serialize().hex()) # Noop
assert chain_tip(block.hash) in node.getchaintips()
bad_block_root = copy.deepcopy(block)
bad_block_root.hashMerkleRoot += 2
bad_block_root.solve()
assert chain_tip(bad_block_root.hash) not in node.getchaintips()
node.submitheader(hexdata=CBlockHeader(bad_block_root).serialize().hex())
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# Should still reject invalid blocks, even if we have the header:
assert_equal(node.submitblock(hexdata=bad_block_root.serialize().hex()), 'bad-txnmrklroot')
assert_equal(node.submitblock(hexdata=bad_block_root.serialize().hex()), 'bad-txnmrklroot')
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# We know the header for this invalid block, so should just return early without error:
node.submitheader(hexdata=CBlockHeader(bad_block_root).serialize().hex())
assert chain_tip(bad_block_root.hash) in node.getchaintips()
bad_block_lock = copy.deepcopy(block)
bad_block_lock.vtx[0].nLockTime = 2**32 - 1
bad_block_lock.vtx[0].rehash()
bad_block_lock.hashMerkleRoot = bad_block_lock.calc_merkle_root()
bad_block_lock.solve()
assert_equal(node.submitblock(hexdata=bad_block_lock.serialize().hex()), 'bad-txns-nonfinal')
assert_equal(node.submitblock(hexdata=bad_block_lock.serialize().hex()), 'duplicate-invalid')
# Build a "good" block on top of the submitted bad block
bad_block2 = copy.deepcopy(block)
bad_block2.hashPrevBlock = bad_block_lock.sha256
bad_block2.solve()
assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=CBlockHeader(bad_block2).serialize().hex()))
# Should reject invalid header right away
bad_block_time = copy.deepcopy(block)
bad_block_time.nTime = 1
bad_block_time.solve()
assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=CBlockHeader(bad_block_time).serialize().hex()))
# Should ask for the block from a p2p node, if they announce the header as well:
node.add_p2p_connection(P2PDataStore())
node.p2p.wait_for_getheaders(timeout=5) # Drop the first getheaders
node.p2p.send_blocks_and_test(blocks=[block], node=node)
# Must be active now:
assert chain_tip(block.hash, status='active', branchlen=0) in node.getchaintips()
# Building a few blocks should give the same results
node.generatetoaddress(10, node.get_deterministic_priv_key().address)
assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=CBlockHeader(bad_block_time).serialize().hex()))
assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=CBlockHeader(bad_block2).serialize().hex()))
node.submitheader(hexdata=CBlockHeader(block).serialize().hex())
node.submitheader(hexdata=CBlockHeader(bad_block_root).serialize().hex())
assert_equal(node.submitblock(hexdata=block.serialize().hex()), 'duplicate') # valid
def run_test(self):
node = self.nodes[0]
def assert_submitblock(block, result_str_1, result_str_2=None):
block.solve()
result_str_2 = result_str_2 or 'duplicate-invalid'
assert_equal(result_str_1, node.submitblock(hexdata=b2x(block.serialize())))
assert_equal(result_str_2, node.submitblock(hexdata=b2x(block.serialize())))
self.log.info('getmininginfo')
mining_info = node.getmininginfo()
assert_equal(mining_info['blocks'], 200)
assert_equal(mining_info['chain'], self.chain)
assert_equal(mining_info['currentblocktx'], 0)
assert_equal(mining_info['currentblockweight'], 0)
assert_equal(mining_info['pooledtx'], 0)
# Mine a block to leave initial block download
node.generate(1)
tmpl = node.getblocktemplate()
self.log.info("getblocktemplate: Test capability advertised")
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl
coinbase_tx = create_coinbase(height=int(tmpl["height"]) + 1)
# sequence numbers must not be max for nLockTime to have effect
coinbase_tx.vin[0].nSequence = 2 ** 32 - 2
coinbase_tx.rehash()
block = CBlock()
block.nVersion = tmpl["version"]
block.hashPrevBlock = int(tmpl["previousblockhash"], 16)
block.nTime = tmpl["curtime"]
block.block_height = node.getblockcount()+1
block.nBits = 0
block.nNonce = 0
block.vtx = [coinbase_tx]
self.log.info("getblocktemplate: Test valid block")
assert_template(node, block, None)
self.log.info("submitblock: Test block decode failure")
assert_raises_rpc_error(-22, "Block decode failed", node.submitblock, b2x(block.serialize()[:-15]))
self.log.info("getblocktemplate: Test bad input hash for coinbase transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].vin[0].prevout.hash += 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-cb-missing')
self.log.info("submitblock: Test invalid coinbase transaction")
assert_raises_rpc_error(-22, "Block does not start with a coinbase", node.submitblock, b2x(bad_block.serialize()))
self.log.info("getblocktemplate: Test truncated final transaction")
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(block.serialize()[:-1]), 'mode': 'proposal'})
self.log.info("getblocktemplate: Test duplicate transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx.append(bad_block.vtx[0])
assert_template(node, bad_block, 'bad-txns-duplicate')
assert_submitblock(bad_block, 'bad-txns-duplicate', 'bad-txns-duplicate')
self.log.info("getblocktemplate: Test invalid transaction")
bad_block = copy.deepcopy(block)
bad_tx = copy.deepcopy(bad_block.vtx[0])
bad_tx.vin[0].prevout.hash = 255
bad_tx.rehash()
bad_block.vtx.append(bad_tx)
assert_template(node, bad_block, 'bad-txns-inputs-missingorspent')
assert_submitblock(bad_block, 'bad-txns-inputs-missingorspent')
self.log.info("getblocktemplate: Test nonfinal transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].nLockTime = 2 ** 32 - 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-txns-nonfinal')
assert_submitblock(bad_block, 'bad-txns-nonfinal')
self.log.info("getblocktemplate: Test bad tx count")
# The tx count is immediately after the block header
TX_COUNT_OFFSET = len(super(CBlock, block).serialize())
bad_block_sn = bytearray(block.serialize())
assert_equal(bad_block_sn[TX_COUNT_OFFSET], 1)
bad_block_sn[TX_COUNT_OFFSET] += 1
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(bad_block_sn), 'mode': 'proposal'})
# No PoW test
# self.log.info("getblocktemplate: Test bad bits")
# bad_block = copy.deepcopy(block)
# bad_block.nBits = 469762303 # impossible in the real world
# assert_template(node, bad_block, 'bad-diffbits')
self.log.info("getblocktemplate: Test bad merkle root")
bad_block = copy.deepcopy(block)
bad_block.hashMerkleRoot += 1
assert_template(node, bad_block, 'bad-txnmrklroot', False)
assert_submitblock(bad_block, 'bad-txnmrklroot', 'bad-txnmrklroot')
self.log.info("getblocktemplate: Test bad timestamps")
bad_block = copy.deepcopy(block)
bad_block.nTime = 2 ** 31 - 1
assert_template(node, bad_block, 'time-too-new')
assert_submitblock(bad_block, 'time-too-new', 'time-too-new')
bad_block.nTime = 0
assert_template(node, bad_block, 'time-too-old')
assert_submitblock(bad_block, 'time-too-old', 'time-too-old')
self.log.info("getblocktemplate: Test not best block")
bad_block = copy.deepcopy(block)
bad_block.hashPrevBlock = 123
assert_template(node, bad_block, 'inconclusive-not-best-prevblk')
assert_submitblock(bad_block, 'prev-blk-not-found', 'prev-blk-not-found')
self.log.info('submitheader tests')
assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='xx' * TX_COUNT_OFFSET))
assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='ff' * (TX_COUNT_OFFSET-2)))
assert_raises_rpc_error(-25, 'Must submit previous header', lambda: node.submitheader(hexdata=super(CBlock, bad_block).serialize().hex()))
block.nTime += 1
block.solve()
def chain_tip(b_hash, *, status='headers-only', branchlen=1):
return {'hash': b_hash, 'height': 202, 'branchlen': branchlen, 'status': status}
assert chain_tip(block.hash) not in node.getchaintips()
node.submitheader(hexdata=b2x(block.serialize()))
assert chain_tip(block.hash) in node.getchaintips()
node.submitheader(hexdata=b2x(CBlockHeader(block).serialize())) # Noop
assert chain_tip(block.hash) in node.getchaintips()
bad_block_root = copy.deepcopy(block)
bad_block_root.hashMerkleRoot += 2
bad_block_root.solve()
assert chain_tip(bad_block_root.hash) not in node.getchaintips()
node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# Should still reject invalid blocks, even if we have the header:
assert_equal(node.submitblock(hexdata=b2x(bad_block_root.serialize())), 'bad-txnmrklroot')
assert_equal(node.submitblock(hexdata=b2x(bad_block_root.serialize())), 'bad-txnmrklroot')
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# We know the header for this invalid block, so should just return early without error:
node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert chain_tip(bad_block_root.hash) in node.getchaintips()
bad_block_lock = copy.deepcopy(block)
bad_block_lock.vtx[0].nLockTime = 2**32 - 1
bad_block_lock.vtx[0].rehash()
bad_block_lock.hashMerkleRoot = bad_block_lock.calc_merkle_root()
bad_block_lock.solve()
assert_equal(node.submitblock(hexdata=b2x(bad_block_lock.serialize())), 'bad-txns-nonfinal')
assert_equal(node.submitblock(hexdata=b2x(bad_block_lock.serialize())), 'duplicate-invalid')
# Build a "good" block on top of the submitted bad block
bad_block2 = copy.deepcopy(block)
bad_block2.hashPrevBlock = bad_block_lock.sha256
bad_block2.solve()
assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block2).serialize())))
# Should reject invalid header right away
bad_block_time = copy.deepcopy(block)
bad_block_time.nTime = 1
bad_block_time.solve()
assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block_time).serialize())))
# Should ask for the block from a p2p node, if they announce the header as well:
node.add_p2p_connection(P2PDataStore())
node.p2p.wait_for_getheaders(timeout=5) # Drop the first getheaders
node.p2p.send_blocks_and_test(blocks=[block], node=node)
# Must be active now:
assert chain_tip(block.hash, status='active', branchlen=0) in node.getchaintips()
# Building a few blocks should give the same results
node.generate(10)
assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block_time).serialize())))
assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block2).serialize())))
node.submitheader(hexdata=b2x(CBlockHeader(block).serialize()))
node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert_equal(node.submitblock(hexdata=b2x(block.serialize())), 'duplicate') # valid
def run_test(self):
node = self.nodes[0]
def assert_submitblock(block, result_str_1, result_str_2=None):
block.solve()
result_str_2 = result_str_2 or 'duplicate-invalid'
assert_equal(result_str_1,
node.submitblock(hexdata=b2x(block.serialize())))
assert_equal(result_str_2,
node.submitblock(hexdata=b2x(block.serialize())))
self.log.info('getmininginfo')
mining_info = node.getmininginfo()
assert_equal(mining_info['blocks'], 200)
assert_equal(mining_info['chain'], 'regtest')
assert_equal(mining_info['currentblocktx'], 0)
assert_equal(mining_info['currentblockweight'], 0)
assert_equal(mining_info['difficulty'],
Decimal('4.656542373906925E-10'))
assert_equal(mining_info['networkhashps'],
Decimal('0.003333333333333334'))
assert_equal(mining_info['pooledtx'], 0)
# Mine a block to leave initial block download
node.generatetoaddress(1, node.get_deterministic_priv_key().address)
tmpl = node.getblocktemplate()
self.log.info("getblocktemplate: Test capability advertised")
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl
coinbase_tx = create_coinbase(height=int(tmpl["height"]) + 1)
# sequence numbers must not be max for nLockTime to have effect
coinbase_tx.vin[0].nSequence = 2**32 - 2
coinbase_tx.rehash()
block = CBlock()
block.nVersion = tmpl["version"]
block.hashPrevBlock = int(tmpl["previousblockhash"], 16)
block.nTime = tmpl["curtime"]
block.nBits = int(tmpl["bits"], 16)
block.nNonce = 0
block.vtx = [coinbase_tx]
self.log.info("getblocktemplate: Test valid block")
assert_template(node, block, None)
self.log.info("submitblock: Test block decode failure")
assert_raises_rpc_error(-22, "Block decode failed", node.submitblock,
b2x(block.serialize()[:-15]))
self.log.info(
"getblocktemplate: Test bad input hash for coinbase transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].vin[0].prevout.hash += 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-cb-missing')
self.log.info("submitblock: Test invalid coinbase transaction")
assert_raises_rpc_error(-22, "Block does not start with a coinbase",
node.submitblock, b2x(bad_block.serialize()))
self.log.info("getblocktemplate: Test truncated final transaction")
assert_raises_rpc_error(-22, "Block decode failed",
node.getblocktemplate, {
'data': b2x(block.serialize()[:-1]),
'mode': 'proposal'
})
self.log.info("getblocktemplate: Test duplicate transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx.append(bad_block.vtx[0])
assert_template(node, bad_block, 'bad-txns-duplicate')
assert_submitblock(bad_block, 'bad-txns-duplicate',
'bad-txns-duplicate')
self.log.info("getblocktemplate: Test invalid transaction")
bad_block = copy.deepcopy(block)
bad_tx = copy.deepcopy(bad_block.vtx[0])
bad_tx.vin[0].prevout.hash = 255
bad_tx.rehash()
bad_block.vtx.append(bad_tx)
assert_template(node, bad_block, 'bad-txns-inputs-missingorspent')
assert_submitblock(bad_block, 'bad-txns-inputs-missingorspent')
self.log.info("getblocktemplate: Test nonfinal transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].nLockTime = 2**32 - 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-txns-nonfinal')
assert_submitblock(bad_block, 'bad-txns-nonfinal')
self.log.info("getblocktemplate: Test bad tx count")
# The tx count is immediately after the block header
TX_COUNT_OFFSET = 80
bad_block_sn = bytearray(block.serialize())
assert_equal(bad_block_sn[TX_COUNT_OFFSET], 1)
bad_block_sn[TX_COUNT_OFFSET] += 1
assert_raises_rpc_error(-22, "Block decode failed",
node.getblocktemplate, {
'data': b2x(bad_block_sn),
'mode': 'proposal'
})
self.log.info("getblocktemplate: Test bad bits")
bad_block = copy.deepcopy(block)
bad_block.nBits = 469762303 # impossible in the real world
assert_template(node, bad_block, 'bad-diffbits')
self.log.info("getblocktemplate: Test bad merkle root")
bad_block = copy.deepcopy(block)
bad_block.hashMerkleRoot += 1
assert_template(node, bad_block, 'bad-txnmrklroot', False)
assert_submitblock(bad_block, 'bad-txnmrklroot', 'bad-txnmrklroot')
self.log.info("getblocktemplate: Test bad timestamps")
bad_block = copy.deepcopy(block)
bad_block.nTime = 2**31 - 1
assert_template(node, bad_block, 'time-too-new')
assert_submitblock(bad_block, 'time-too-new', 'time-too-new')
bad_block.nTime = 0
assert_template(node, bad_block, 'time-too-old')
assert_submitblock(bad_block, 'time-too-old', 'time-too-old')
self.log.info("getblocktemplate: Test not best block")
bad_block = copy.deepcopy(block)
bad_block.hashPrevBlock = 123
assert_template(node, bad_block, 'inconclusive-not-best-prevblk')
assert_submitblock(bad_block, 'prev-blk-not-found',
'prev-blk-not-found')
self.log.info('submitheader tests')
assert_raises_rpc_error(-22, 'Block header decode failed',
lambda: node.submitheader(hexdata='xx' * 80))
assert_raises_rpc_error(-22, 'Block header decode failed',
lambda: node.submitheader(hexdata='ff' * 78))
assert_raises_rpc_error(-25, 'Must submit previous header',
lambda: node.submitheader(hexdata='ff' * 80))
block.nTime += 1
block.solve()
def chain_tip(b_hash, *, status='headers-only', branchlen=1):
return {
'hash': b_hash,
'height': 202,
'branchlen': branchlen,
'status': status
}
assert chain_tip(block.hash) not in node.getchaintips()
node.submitheader(hexdata=b2x(block.serialize()))
assert chain_tip(block.hash) in node.getchaintips()
node.submitheader(hexdata=b2x(CBlockHeader(block).serialize())) # Noop
assert chain_tip(block.hash) in node.getchaintips()
bad_block_root = copy.deepcopy(block)
bad_block_root.hashMerkleRoot += 2
bad_block_root.solve()
assert chain_tip(bad_block_root.hash) not in node.getchaintips()
node.submitheader(
hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# Should still reject invalid blocks, even if we have the header:
assert_equal(node.submitblock(hexdata=b2x(bad_block_root.serialize())),
'bad-txnmrklroot')
assert_equal(node.submitblock(hexdata=b2x(bad_block_root.serialize())),
'bad-txnmrklroot')
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# We know the header for this invalid block, so should just return early without error:
node.submitheader(
hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert chain_tip(bad_block_root.hash) in node.getchaintips()
bad_block_lock = copy.deepcopy(block)
bad_block_lock.vtx[0].nLockTime = 2**32 - 1
bad_block_lock.vtx[0].rehash()
bad_block_lock.hashMerkleRoot = bad_block_lock.calc_merkle_root()
bad_block_lock.solve()
assert_equal(node.submitblock(hexdata=b2x(bad_block_lock.serialize())),
'bad-txns-nonfinal')
assert_equal(node.submitblock(hexdata=b2x(bad_block_lock.serialize())),
'duplicate-invalid')
# Build a "good" block on top of the submitted bad block
bad_block2 = copy.deepcopy(block)
bad_block2.hashPrevBlock = bad_block_lock.sha256
bad_block2.solve()
assert_raises_rpc_error(
-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(
CBlockHeader(bad_block2).serialize())))
# Should reject invalid header right away
bad_block_time = copy.deepcopy(block)
bad_block_time.nTime = 1
bad_block_time.solve()
assert_raises_rpc_error(
-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(
CBlockHeader(bad_block_time).serialize())))
# Should ask for the block from a p2p node, if they announce the header as well:
node.add_p2p_connection(P2PDataStore())
node.p2p.wait_for_getheaders(timeout=5) # Drop the first getheaders
node.p2p.send_blocks_and_test(blocks=[block], node=node)
# Must be active now:
assert chain_tip(block.hash, status='active',
branchlen=0) in node.getchaintips()
# Building a few blocks should give the same results
node.generatetoaddress(10, node.get_deterministic_priv_key().address)
assert_raises_rpc_error(
-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(
CBlockHeader(bad_block_time).serialize())))
assert_raises_rpc_error(
-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(
CBlockHeader(bad_block2).serialize())))
node.submitheader(hexdata=b2x(CBlockHeader(block).serialize()))
node.submitheader(
hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert_equal(node.submitblock(hexdata=b2x(block.serialize())),
'duplicate') # valid
def run_test(self):
node = self.nodes[0]
def assert_submitblock(block, result_str_1, result_str_2=None):
block.solve()
result_str_2 = result_str_2 or 'duplicate-invalid'
assert_equal(result_str_1,
node.submitblock(hexdata=block.serialize().hex()))
assert_equal(result_str_2,
node.submitblock(hexdata=block.serialize().hex()))
self.log.info('getmininginfo')
mining_info = node.getmininginfo()
assert_equal(mining_info['blocks'], 200)
assert_equal(mining_info['chain'], self.chain)
assert_equal(mining_info['currentblocksize'], 0)
assert_equal(mining_info['currentblocktx'], 0)
assert_equal(mining_info['difficulty'],
Decimal('4.656542373906925E-10'))
assert_equal(mining_info['networkhashps'],
Decimal('0.003333333333333334'))
assert_equal(mining_info['pooledtx'], 0)
# Mine a block to leave initial block download
self.generatetoaddress(node, 1,
node.get_deterministic_priv_key().address)
tmpl = node.getblocktemplate()
self.log.info("getblocktemplate: Test capability advertised")
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl
next_height = int(tmpl["height"])
coinbase_tx = create_coinbase(height=next_height)
# sequence numbers must not be max for nLockTime to have effect
coinbase_tx.vin[0].nSequence = 2**32 - 2
coinbase_tx.rehash()
# round-trip the encoded bip34 block height commitment
assert_equal(CScriptNum.decode(coinbase_tx.vin[0].scriptSig),
next_height)
# round-trip negative and multi-byte CScriptNums to catch python
# regression
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(1500))),
1500)
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1500))),
-1500)
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1))), -1)
block = CBlock()
block.nVersion = tmpl["version"]
block.hashPrevBlock = int(tmpl["previousblockhash"], 16)
block.nTime = tmpl["curtime"]
block.nBits = int(tmpl["bits"], 16)
block.nNonce = 0
block.vtx = [coinbase_tx]
self.log.info("getblocktemplate: Test valid block")
assert_template(node, block, None)
self.log.info("submitblock: Test block decode failure")
assert_raises_rpc_error(-22, "Block decode failed", node.submitblock,
block.serialize()[:-15].hex())
self.log.info(
"getblocktemplate: Test bad input hash for coinbase transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].vin[0].prevout.hash += 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-cb-missing')
self.log.info("submitblock: Test invalid coinbase transaction")
assert_raises_rpc_error(-22, "Block does not start with a coinbase",
node.submitblock,
bad_block.serialize().hex())
self.log.info("getblocktemplate: Test truncated final transaction")
assert_raises_rpc_error(-22, "Block decode failed",
node.getblocktemplate, {
'data': block.serialize()[:-1].hex(),
'mode': 'proposal'
})
self.log.info("getblocktemplate: Test duplicate transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx.append(bad_block.vtx[0])
assert_template(node, bad_block, 'bad-txns-duplicate')
assert_submitblock(bad_block, 'bad-txns-duplicate',
'bad-txns-duplicate')
self.log.info("getblocktemplate: Test invalid transaction")
bad_block = copy.deepcopy(block)
bad_tx = copy.deepcopy(bad_block.vtx[0])
bad_tx.vin[0].prevout.hash = 255
bad_tx.rehash()
bad_block.vtx.append(bad_tx)
assert_template(node, bad_block, 'bad-txns-inputs-missingorspent')
assert_submitblock(bad_block, 'bad-txns-inputs-missingorspent')
self.log.info("getblocktemplate: Test nonfinal transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].nLockTime = 2**32 - 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-txns-nonfinal')
assert_submitblock(bad_block, 'bad-txns-nonfinal')
self.log.info("getblocktemplate: Test bad tx count")
# The tx count is immediately after the block header
TX_COUNT_OFFSET = 80
bad_block_sn = bytearray(block.serialize())
assert_equal(bad_block_sn[TX_COUNT_OFFSET], 1)
bad_block_sn[TX_COUNT_OFFSET] += 1
assert_raises_rpc_error(-22, "Block decode failed",
node.getblocktemplate, {
'data': bad_block_sn.hex(),
'mode': 'proposal'
})
self.log.info("getblocktemplate: Test bad bits")
bad_block = copy.deepcopy(block)
bad_block.nBits = 469762303 # impossible in the real world
assert_template(node, bad_block, 'bad-diffbits')
self.log.info("getblocktemplate: Test bad merkle root")
bad_block = copy.deepcopy(block)
bad_block.hashMerkleRoot += 1
assert_template(node, bad_block, 'bad-txnmrklroot', False)
assert_submitblock(bad_block, 'bad-txnmrklroot', 'bad-txnmrklroot')
self.log.info("getblocktemplate: Test bad timestamps")
bad_block = copy.deepcopy(block)
bad_block.nTime = 2**31 - 1
assert_template(node, bad_block, 'time-too-new')
assert_submitblock(bad_block, 'time-too-new', 'time-too-new')
bad_block.nTime = 0
assert_template(node, bad_block, 'time-too-old')
assert_submitblock(bad_block, 'time-too-old', 'time-too-old')
self.log.info("getblocktemplate: Test not best block")
bad_block = copy.deepcopy(block)
bad_block.hashPrevBlock = 123
assert_template(node, bad_block, 'inconclusive-not-best-prevblk')
assert_submitblock(bad_block, 'prev-blk-not-found',
'prev-blk-not-found')
self.log.info('submitheader tests')
assert_raises_rpc_error(-22, 'Block header decode failed',
lambda: node.submitheader(hexdata='xx' * 80))
assert_raises_rpc_error(-22, 'Block header decode failed',
lambda: node.submitheader(hexdata='ff' * 78))
assert_raises_rpc_error(-25, 'Must submit previous header',
lambda: node.submitheader(hexdata='ff' * 80))
block.nTime += 1
block.solve()
def chain_tip(b_hash, *, status='headers-only', branchlen=1):
return {
'hash': b_hash,
'height': 202,
'branchlen': branchlen,
'status': status
}
assert chain_tip(block.hash) not in node.getchaintips()
node.submitheader(hexdata=block.serialize().hex())
assert chain_tip(block.hash) in node.getchaintips()
# Noop
node.submitheader(hexdata=CBlockHeader(block).serialize().hex())
assert chain_tip(block.hash) in node.getchaintips()
bad_block_root = copy.deepcopy(block)
bad_block_root.hashMerkleRoot += 2
bad_block_root.solve()
assert chain_tip(bad_block_root.hash) not in node.getchaintips()
node.submitheader(
hexdata=CBlockHeader(bad_block_root).serialize().hex())
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# Should still reject invalid blocks, even if we have the header:
assert_equal(
node.submitblock(hexdata=bad_block_root.serialize().hex()),
'bad-txnmrklroot')
assert_equal(
node.submitblock(hexdata=bad_block_root.serialize().hex()),
'bad-txnmrklroot')
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# We know the header for this invalid block, so should just return
# early without error:
node.submitheader(
hexdata=CBlockHeader(bad_block_root).serialize().hex())
assert chain_tip(bad_block_root.hash) in node.getchaintips()
bad_block_lock = copy.deepcopy(block)
bad_block_lock.vtx[0].nLockTime = 2**32 - 1
bad_block_lock.vtx[0].rehash()
bad_block_lock.hashMerkleRoot = bad_block_lock.calc_merkle_root()
bad_block_lock.solve()
assert_equal(
node.submitblock(hexdata=bad_block_lock.serialize().hex()),
'bad-txns-nonfinal')
assert_equal(
node.submitblock(hexdata=bad_block_lock.serialize().hex()),
'duplicate-invalid')
# Build a "good" block on top of the submitted bad block
bad_block2 = copy.deepcopy(block)
bad_block2.hashPrevBlock = bad_block_lock.sha256
bad_block2.solve()
assert_raises_rpc_error(
-25, 'bad-prevblk', lambda: node.submitheader(hexdata=CBlockHeader(
bad_block2).serialize().hex()))
# Should reject invalid header right away
bad_block_time = copy.deepcopy(block)
bad_block_time.nTime = 1
bad_block_time.solve()
assert_raises_rpc_error(
-25, 'time-too-old', lambda: node.submitheader(
hexdata=CBlockHeader(bad_block_time).serialize().hex()))
# Should ask for the block from a p2p node, if they announce the header
# as well:
node.add_p2p_connection(P2PDataStore())
# Drop the first getheaders
node.p2p.wait_for_getheaders(timeout=5)
node.p2p.send_blocks_and_test(blocks=[block], node=node)
# Must be active now:
assert chain_tip(block.hash, status='active',
branchlen=0) in node.getchaintips()
# Building a few blocks should give the same results
self.generatetoaddress(node, 10,
node.get_deterministic_priv_key().address)
assert_raises_rpc_error(
-25, 'time-too-old', lambda: node.submitheader(
hexdata=CBlockHeader(bad_block_time).serialize().hex()))
assert_raises_rpc_error(
-25, 'bad-prevblk', lambda: node.submitheader(hexdata=CBlockHeader(
bad_block2).serialize().hex()))
node.submitheader(hexdata=CBlockHeader(block).serialize().hex())
node.submitheader(
hexdata=CBlockHeader(bad_block_root).serialize().hex())
# valid
assert_equal(node.submitblock(hexdata=block.serialize().hex()),
'duplicate')
# Ensure that "parameters" and "dummy" second arg are interchangeable
self.log.info("Ensuring that the \"dummy\" and \"parameters\" args to "
"submitblock are aliases of each other")
# Ensure that unknown arg raises the right error
assert_raises_rpc_error(-8,
"Unknown named parameter foobar",
node.submitblock,
hexdata=block.serialize().hex(),
foobar={})
# Now check that dummy={} is accepted as a valid call
assert_equal(
node.submitblock(hexdata=block.serialize().hex(), dummy={}),
'duplicate')
# And that parameters={} is accepted as a valid call
assert_equal(
node.submitblock(hexdata=block.serialize().hex(), parameters={}),
'duplicate')
# Test for RPC_CLIENT_NOT_CONNECTED error
self.nodes[0].disconnect_p2ps()
self.nodes[1].disconnect_p2ps()
self.stop_node(1)
assert_raises_rpc_error(
-9, # RPC_CLIENT_NOT_CONNECTED
"Bitcoin is not connected!",
node.getblocktemplate)
def update_block(block: CBlock,
new_transactions: Sequence[CTransaction]):
block.vtx.extend(new_transactions)
make_conform_to_ctor(block)
block.hashMerkleRoot = block.calc_merkle_root()
block.solve()
