45 lines
1.9 KiB
Python
45 lines
1.9 KiB
Python
import hashlib
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from pyelliptic import arithmetic
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# This function expects that pubkey begin with \x04
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def calculateBitcoinAddressFromPubkey(pubkey):
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if len(pubkey) != 65:
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print 'Could not calculate Bitcoin address from pubkey because function was passed a pubkey that was', len(pubkey), 'bytes long rather than 65.'
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return "error"
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ripe = hashlib.new('ripemd160')
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sha = hashlib.new('sha256')
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sha.update(pubkey)
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ripe.update(sha.digest())
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ripeWithProdnetPrefix = '\x00' + ripe.digest()
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checksum = hashlib.sha256(hashlib.sha256(
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ripeWithProdnetPrefix).digest()).digest()[:4]
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binaryBitcoinAddress = ripeWithProdnetPrefix + checksum
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numberOfZeroBytesOnBinaryBitcoinAddress = 0
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while binaryBitcoinAddress[0] == '\x00':
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numberOfZeroBytesOnBinaryBitcoinAddress += 1
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binaryBitcoinAddress = binaryBitcoinAddress[1:]
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base58encoded = arithmetic.changebase(binaryBitcoinAddress, 256, 58)
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return "1" * numberOfZeroBytesOnBinaryBitcoinAddress + base58encoded
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def calculateTestnetAddressFromPubkey(pubkey):
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if len(pubkey) != 65:
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print 'Could not calculate Bitcoin address from pubkey because function was passed a pubkey that was', len(pubkey), 'bytes long rather than 65.'
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return "error"
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ripe = hashlib.new('ripemd160')
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sha = hashlib.new('sha256')
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sha.update(pubkey)
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ripe.update(sha.digest())
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ripeWithProdnetPrefix = '\x6F' + ripe.digest()
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checksum = hashlib.sha256(hashlib.sha256(
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ripeWithProdnetPrefix).digest()).digest()[:4]
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binaryBitcoinAddress = ripeWithProdnetPrefix + checksum
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numberOfZeroBytesOnBinaryBitcoinAddress = 0
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while binaryBitcoinAddress[0] == '\x00':
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numberOfZeroBytesOnBinaryBitcoinAddress += 1
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binaryBitcoinAddress = binaryBitcoinAddress[1:]
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base58encoded = arithmetic.changebase(binaryBitcoinAddress, 256, 58)
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return "1" * numberOfZeroBytesOnBinaryBitcoinAddress + base58encoded
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