Add tx reverse re-pack

tests/test_tx.py

@@ -1,5 +1,7 @@
 # standard imports
-import unittest 
+import os
+import unittest
+import logging
 
 # local imports
 from chainlib.eth.unittest.ethtester import EthTesterCase
@@ -10,9 +12,26 @@ from chainlib.eth.gas import (
         )
 from chainlib.eth.tx import (
         unpack,
+        pack,
+        raw,
+        transaction,
         TxFormat,
+        TxFactory,
+        Tx,
         )
-from hexathon import strip_0x
+from chainlib.eth.contract import (
+        ABIContractEncoder,
+        ABIContractType,
+        )
+from chainlib.eth.address import to_checksum_address
+from hexathon import (
+        strip_0x,
+        add_0x,
+        )
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
 
 class TxTestCase(EthTesterCase):
 
@@ -26,5 +45,35 @@ class TxTestCase(EthTesterCase):
         self.assertEqual(tx['to'], self.accounts[1])
 
 
+    def test_tx_pack(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        gas_oracle = RPCGasOracle(self.rpc)
+
+        mock_contract = to_checksum_address(add_0x(os.urandom(20).hex()))
+
+        f = TxFactory(self.chain_spec, signer=self.rpc)
+        enc = ABIContractEncoder()
+        enc.method('fooMethod')
+        enc.typ(ABIContractType.UINT256)
+        enc.uint256(13)
+        data = enc.get()
+        tx = f.template(self.accounts[0], mock_contract, use_nonce=True)
+        tx = f.set_code(tx, data)
+        (tx_hash, tx_signed_raw_hex) = f.finalize(tx, TxFormat.RLP_SIGNED)
+        logg.debug('tx result {}'.format(tx))
+        o = raw(tx_signed_raw_hex)
+        r = self.rpc.do(o)
+        o = transaction(tx_hash)
+        tx_rpc_src = self.rpc.do(o)
+        logg.debug('rpc src {}'.format(tx_rpc_src))
+
+        tx_signed_raw_bytes = bytes.fromhex(strip_0x(tx_signed_raw_hex))
+        tx_src = unpack(tx_signed_raw_bytes, self.chain_spec)
+        txo = Tx(tx_src)
+        tx_signed_raw_bytes_recovered = pack(txo, self.chain_spec)
+        logg.debug('o {}'.format(tx_signed_raw_bytes.hex()))
+        logg.debug('r {}'.format(tx_signed_raw_bytes_recovered.hex()))
+        self.assertEqual(tx_signed_raw_bytes, tx_signed_raw_bytes_recovered)
+
 if __name__ == '__main__':
     unittest.main()