def rebuild_template(self):
"""Rebuild a version 2 blockheader and serialize it.
oldest satoshi client coinbase script contains:
nBits, bnExtraNonce (nBits = GetNextWorkRequired(pindexPrev);)
later timestamp was used instead of "bits" to ensure coinbase txn is unique even if address is the same (github:83f4cd156e9d52bd7c4351336dfa4806a43ee4e4=.
now in version 2 blocks the height is included instead of the timestamp.
"""
coinbase_script = Script(
[push_bignum_instruction(self.block_height)] +
[push_bignum_instruction(self.extra_nonce)] +
[push_data_instruction(flag) for flag in self.coinbase_flags])
coinbase_txin = TxIn(Outpoint.null(),
coinbase_script,
sequence=TxIn.NSEQUENCE_FINAL)
coinbase_tx = Tx(version=1,
in_list=[coinbase_txin],
out_list=self.coinbase_txout_list,
locktime=0)
self.block_transactions = [coinbase_tx] + self.transactions
self.blockheader = BlockHeader(version=2,
hash_prev=self.hash_prev,
hash_merkle=compute_merkle_root(
self.block_transactions),
time=self.time,
bits=self.bits,
nonce=self.nonce)
self.serialized = self.serializer.serialize(self.blockheader)
def rebuild_template(self):
"""Rebuild a version 2 blockheader and serialize it.
oldest satoshi client coinbase script contains:
nBits, bnExtraNonce (nBits = GetNextWorkRequired(pindexPrev);)
later timestamp was used instead of "bits" to ensure coinbase txn is unique even if address is the same (github:83f4cd156e9d52bd7c4351336dfa4806a43ee4e4=.
now in version 2 blocks the height is included instead of the timestamp.
"""
coinbase_script = Script([push_bignum_instruction(self.block_height)] +
[push_bignum_instruction(self.extra_nonce)] +
[push_data_instruction(flag) for flag in self.coinbase_flags])
coinbase_txin = TxIn(Outpoint.null(),
coinbase_script,
sequence=TxIn.NSEQUENCE_FINAL)
coinbase_tx = Tx(version=1,
in_list=[coinbase_txin],
out_list=self.coinbase_txout_list,
locktime=0)
self.block_transactions = [coinbase_tx] + self.transactions
self.blockheader = BlockHeader(version=2,
hash_prev=self.hash_prev,
hash_merkle=compute_merkle_root(self.block_transactions),
time=self.time,
bits=self.bits,
nonce=self.nonce)
self.serialized = self.serializer.serialize(self.blockheader)
def check_merkle_root(self, hash, block):
merkle = compute_merkle_root(block.transactions)
if merkle != block.blockheader.hash_merkle:
raise Exception("merkel root incorrect for block %s: %s != %s" % (str(hash), str(merkle), str(block.blockheader.hash_merkle)) )
Script([push_data_instruction(decodehexstr("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f")),Instruction(OP_CHECKSIG)]))],
0) #locktime
])
GENESIS = {MAIN : GENESIS_MAIN, TESTNET : GENESIS_TESTNET, TESTNET3: GENESIS_TESTNET3, UNITNET : GENESIS_UNITNET }
if __name__ == '__main__':
from coinpy.lib.blocks.hash_block import hash_block
from coinpy.tools.hex import hexstr
from coinpy.lib.serialization.structures.s11n_blockheader import BlockheaderSerializer
from coinpy.tools.bitcoin.sha256 import doublesha256
from coinpy.lib.transactions.hash_tx import hash_tx
from coinpy.lib.serialization.structures.s11n_tx import TxSerializer
print GENESIS_MAIN
print hash_block(GENESIS_MAIN)
assert GENESIS_MAIN.blockheader.hash_merkle == compute_merkle_root(GENESIS_MAIN.transactions)
print GENESIS_TESTNET
print hash_block(GENESIS_TESTNET)
assert GENESIS_TESTNET.blockheader.hash_merkle == compute_merkle_root(GENESIS_TESTNET.transactions)
print GENESIS_TESTNET3
print hash_block(GENESIS_TESTNET3)
assert GENESIS_TESTNET3.blockheader.hash_merkle == compute_merkle_root(GENESIS_TESTNET3.transactions)
print GENESIS_UNITNET
print hash_block(GENESIS_UNITNET)
print GENESIS_UNITNET.blockheader.hash_merkle
assert GENESIS_UNITNET.blockheader.hash_merkle == compute_merkle_root(GENESIS_UNITNET.transactions)
def check_merkle_root(self, hash, block):
merkle = compute_merkle_root(block.transactions)
if merkle != block.blockheader.hash_merkle:
raise Exception(
"merkel root incorrect for block %s: %s != %s" %
(str(hash), str(merkle), str(block.blockheader.hash_merkle)))
