55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
# (c) Copyright 2018 by Coinkite Inc. This file is part of Coldcard <coldcardwallet.com>
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# and is covered by GPLv3 license found in COPYING.
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#
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# stuff I need sometimes
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from io import BytesIO
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from binascii import b2a_hex
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from decimal import Decimal
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import random
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def B2A(s):
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return str(b2a_hex(s), 'ascii')
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def U2SAT(v):
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return int(v * Decimal('1E8'))
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# use like this:
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#
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# with into_hex() as a:
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# a.write('sdlkfjsdflkj')
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#
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# ... will print hex of whatever was streamed.
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#
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class into_hex(BytesIO):
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def __exit__(self, *a):
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print('hex: %s' % str(b2a_hex(self.getvalue()), 'ascii'))
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return super().__exit__(*a)
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'''
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>>> from binascii import *
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>>> from helpers import into_hex
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>>> from pycoin.tx.Tx import Tx
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>>> t = Tx.from_hex('010000....')
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>>> with into_hex() as fd:
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>>> t.txs_out[0].stream(fd)
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'''
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def dump_txos(hx, out_num=0):
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from binascii import b2a_hex
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from helpers import into_hex
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from pycoin.tx.Tx import Tx
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t = Tx.from_hex(hx)
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with into_hex() as fd:
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t.txs_out[out_num].stream(fd)
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print('hash160: %s' % b2a_hex(t.txs_out[out_num].hash160()))
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return t
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def prandom(count):
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# make some bytes, randomly, but not: deterministic
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return bytes(random.randint(0, 255) for i in range(count))
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# EOF
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