sign_transaction

def sign_transaction(self, secrets):
    """
    Sign all inputs of the transaction with
    a secret key.
    :param ECPrivKey[] secrets: a list of private keys corresponding to the inputs
    :return: Transaction Signed version of the transaction ready to be published
    """
    unsigned = bytes.fromhex(self.serialize_to_hex())
    message = sha256(sha256(unsigned))
    copy = deepcopy(self)
    inputs = self.__inputs
    for i in range(0, len(secrets)):
        sk = secrets[i]
        inp = inputs[i]
        sig = SignatureFactory.gen_ecdsa_signature_bytes(message, sk)
        copy.set_signature(sig)
        sigscript = sig.get_asn1_encoded() + OP_SIGHASH_ALL
        l = len(bytes.fromhex(sigscript))
        script = compact_size_int(l) + sigscript + inp.get_sig_script()
        copy.__inputs[i].set_sig_script(script)
    return copy
   
0100000001d2af3bdf99ca2b60b1fe6e50c53e7029779a0442ffc9ea79dff6cc1fda357757000000006a47304402207da5c1e2d7db828e415db1ae060d65e4a44de2b13b71c50be61d6c52da82425b022010da9abb70c7b6047b559c5c572f68e078d6ae78ba03dfd6aa1890e512e376760121034323ee9ac23504779b40c1b02578d27f70c12c22b7fc4f452dbbde681e45073dffffffff0106226900000000001976a9149f9a7abd600c0caa03983a77c8c3df8e062cb2fa88ac00000000

{"version": "01000000", "flag": "", "inputLen": "01", "inputs": [{"prevOutHash": "d2af3bdf99ca2b60b1fe6e50c53e7029779a0442ffc9ea79dff6cc1fda357757", "prevOutIx": "00000000", "sigScriptLen": "6a", "sigScript": "47304402207da5c1e2d7db828e415db1ae060d65e4a44de2b13b71c50be61d6c52da82425b022010da9abb70c7b6047b559c5c572f68e078d6ae78ba03dfd6aa1890e512e376760121034323ee9ac23504779b40c1b02578d27f70c12c22b7fc4f452dbbde681e45073d", "sequence": "ffffffff"}], "outputLen": "01", "outputs": [{"value": "0622690000000000", "pubKeyScriptLength": "19", "pubKeyScript": "76a9149f9a7abd600c0caa03983a77c8c3df8e062cb2fa88ac"}], "locktime": "00000000"}
   
47 Script length
30 DER signature marker
44 Signature length
02 r value marker
20 r value length
7da5c1e2d7db828e415db1ae060d65e4a44de2b13b71c50be61d6c52da82425b r value
02 s value marker
2010da9abb70c7b6047b559c5c572f68e078d6ae78ba03dfd6aa1890e512e37676 s value
01 Opcode SIGHASH
21 pubkey length
034323ee9ac23504779b40c1b02578d27f70c12c22b7fc4f452dbbde681e45073d pubkey value