forked from LBRYCommunity/lbry-sdk
87 lines
3 KiB
Python
87 lines
3 KiB
Python
__node_daemon__ = 'bitcoind'
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__node_cli__ = 'bitcoin-cli'
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__node_bin__ = 'bitcoin-0.16.3/bin'
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__node_url__ = (
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'https://bitcoin.org/bin/bitcoin-core-0.16.3/bitcoin-0.16.3-x86_64-linux-gnu.tar.gz'
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)
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__electrumx__ = 'electrumx.lib.coins.BitcoinSegwitRegtest'
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import struct
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from typing import Optional
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from binascii import hexlify, unhexlify
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from torba.baseledger import BaseLedger
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from torba.baseheader import BaseHeaders, ArithUint256
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class MainHeaders(BaseHeaders):
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header_size = 80
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chunk_size = 2016
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max_target = 0x00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff
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genesis_hash: Optional[bytes] = b'000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f'
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target_timespan = 14 * 24 * 60 * 60
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@staticmethod
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def serialize(header: dict) -> bytes:
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return b''.join([
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struct.pack('<I', header['version']),
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unhexlify(header['prev_block_hash'])[::-1],
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unhexlify(header['merkle_root'])[::-1],
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struct.pack('<III', header['timestamp'], header['bits'], header['nonce'])
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])
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@staticmethod
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def deserialize(height, header):
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version, = struct.unpack('<I', header[:4])
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timestamp, bits, nonce = struct.unpack('<III', header[68:80])
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return {
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'block_height': height,
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'version': version,
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'prev_block_hash': hexlify(header[4:36][::-1]),
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'merkle_root': hexlify(header[36:68][::-1]),
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'timestamp': timestamp,
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'bits': bits,
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'nonce': nonce
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}
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def get_next_chunk_target(self, chunk: int) -> ArithUint256:
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if chunk == -1:
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return ArithUint256(self.max_target)
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previous = self[chunk * 2016]
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current = self[chunk * 2016 + 2015]
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actual_timespan = current['timestamp'] - previous['timestamp']
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actual_timespan = max(actual_timespan, int(self.target_timespan / 4))
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actual_timespan = min(actual_timespan, self.target_timespan * 4)
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target = ArithUint256.from_compact(current['bits'])
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new_target = min(ArithUint256(self.max_target), (target * actual_timespan) / self.target_timespan)
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return new_target
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class MainNetLedger(BaseLedger):
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name = 'BitcoinSegwit'
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symbol = 'BTC'
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network_name = 'mainnet'
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headers_class = MainHeaders
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pubkey_address_prefix = bytes((0,))
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script_address_prefix = bytes((5,))
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extended_public_key_prefix = unhexlify('0488b21e')
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extended_private_key_prefix = unhexlify('0488ade4')
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default_fee_per_byte = 50
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class UnverifiedHeaders(MainHeaders):
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max_target = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
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genesis_hash = None
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validate_difficulty = False
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class RegTestLedger(MainNetLedger):
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network_name = 'regtest'
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headers_class = UnverifiedHeaders
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pubkey_address_prefix = bytes((111,))
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script_address_prefix = bytes((196,))
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extended_public_key_prefix = unhexlify('043587cf')
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extended_private_key_prefix = unhexlify('04358394')
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