2013-12-19 12:38:09 -06:00
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from pybitcointools import *
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import rlp
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import re
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class Transaction():
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def __init__(*args):
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2013-12-19 20:26:52 -06:00
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if len(args) == 2:
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self.parse(args[1])
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else:
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self.to = args[1]
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self.value = args[2]
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self.fee = args[3]
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self.data = args[4]
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if len(args) > 5: self.sig = args[5]
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2013-12-19 12:38:09 -06:00
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def lpad(inp,L): return '\x00' * max(0,L - len(inp)) + inp
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def parse(self,data):
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if re.match('^[0-9a-fA-F]*$',data):
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data = data.decode('hex')
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o = rlp.unparse(data)
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self.to = lpad(o[0],20)
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self.value = decode(o[1],256)
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self.fee = decode(o[2],256)
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self.data = rlp.unparse(o[-3])
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self.sig = o[-4]
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rawhash = sha256(rlp.encode([self.to,self.value,self.fee,self.data]))
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v,r,s = ord(self.sig[0]), decode(self.sig[1:33],256), decode(self.sig[33:],256)
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self.from = hash160(ecdsa_raw_recover(rawhash,(v,r,s)))
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def sign(self,key):
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rawhash = sha256(rlp.parse([self.to,self.value,self.fee,self.data]))
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v,r,s = ecdsa_raw_sign(rawhash,args[5])
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self.sig = chr(v)+encode(r,256,32)+encode(s,256,32)
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self.from = hash160(privtopub(args[5]))
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def serialize(self):
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return rlp.parse([self.to, self.value, self.fee, self.data, self.sig]).encode('hex')
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def hash(self):
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return bin_sha256(self.serialize())
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