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https://github.com/alexgo-io/stacks-puppet-node.git
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51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Blockstack
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~~~~~
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copyright: (c) 2014-2015 by Halfmoon Labs, Inc.
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copyright: (c) 2016 by Blockstack.org
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This file is part of Blockstack
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Blockstack is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Blockstack is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Blockstack. If not, see <http://www.gnu.org/licenses/>.
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"""
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from utilitybelt import dev_urandom_entropy, is_hex
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from binascii import hexlify, unhexlify
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from pybitcoin.hash import hex_hash160, bin_hash160, bin_sha256, bin_double_sha256, hex_to_bin_reversed, bin_to_hex_reversed
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from .b40 import b40_to_bin
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from .config import LENGTHS
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def hash_name(name, script_pubkey, register_addr=None):
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"""
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Generate the hash over a name and hex-string script pubkey
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"""
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bin_name = b40_to_bin(name)
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name_and_pubkey = bin_name + unhexlify(script_pubkey)
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if register_addr is not None:
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name_and_pubkey += str(register_addr)
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return hex_hash160(name_and_pubkey)
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def hash256_trunc128( data ):
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"""
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Hash a string of data by taking its 256-bit sha256 and truncating it to 128 bits.
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"""
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return hexlify( bin_sha256( data )[0:16] )
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