20 lines
925 B
Python
20 lines
925 B
Python
utxos: public({owner: address, value: num}[bytes32])
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def __init__():
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self.utxos[as_bytes32(1)] = {owner: msg.sender, value: 4294967296}
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def tx(in1: bytes32, in2: bytes32, out1: address, value1: num,
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out2: address, value2: num, v: num256, r: num256, s: num256) -> bytes32:
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sighash = sha3(concat(in1, in2, as_bytes32(out1), as_bytes32(value1), as_bytes32(out2), as_bytes32(value2)))
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sender = ecrecover(sighash, v, r, s)
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assert self.utxos[in1].owner == sender or not in1
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assert self.utxos[in2].owner == sender or not in2
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value = self.utxos[in1].value + self.utxos[in2].value
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assert value == value1 + value2
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self.utxos[in1] = {owner: None, value: None}
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self.utxos[in2] = {owner: None, value: None}
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self.utxos[sighash] = {owner: out1, value: value1}
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self.utxos[as_bytes32(bitwise_xor(as_num256(sighash), as_num256(1)))] = \
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{owner: out2, value: value2}
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return sighash
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