Method sign_input

code-ch08/tx.py:232–247

Signs the input using the private key

(self, input_index, private_key)

        return True

    def sign_input(self, input_index, private_key):
        '''Signs the input using the private key'''
        # get the signature hash (z)
        z = self.sig_hash(input_index)
        # get der signature of z from private key
        der = private_key.sign(z).der()
        # append the SIGHASH_ALL to der (use SIGHASH_ALL.to_bytes(1, 'big'))
        sig = der + SIGHASH_ALL.to_bytes(1, 'big')
        # calculate the sec
        sec = private_key.point.sec()
        # initialize a new script with [sig, sec] as the cmds
        script_sig = Script([sig, sec])
        # change input's script_sig to new script
        self.tx_ins[input_index].script_sig = script_sig
        # return whether sig is valid using self.verify_input
        return self.verify_input(input_index)


class TxIn: