chainlib-eth

Ethereum implementation of the chainlib interface
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contract.py (1855B)

      1 # standard imports
      2 import os
      3 
      4 # external iports
      5 from chainlib.eth.tx import (
      6         TxFactory,
      7         TxFormat,
      8         receipt,
      9         )
     10 from chainlib.eth.contract import (
     11         ABIContractEncoder,
     12         #ABIContractDecoder,
     13         ABIContractType,
     14         )
     15 from hexathon import add_0x
     16 
     17 script_dir = os.path.realpath(os.path.dirname(__file__))
     18 data_dir = script_dir
     19 
     20 class TestContract(TxFactory):
     21 
     22     __abi = None
     23     __bytecode = None
     24 
     25     @staticmethod
     26     def gas(code=None):
     27         return 1000000
     28 
     29 
     30     @staticmethod
     31     def abi():
     32         if TestContract.__abi == None:
     33             f = open(os.path.join(data_dir, 'TestContract.json'), 'r')
     34             TestContract.__abi = json.load(f)
     35             f.close()
     36         return TestContract.__abi
     37 
     38 
     39     @staticmethod
     40     def bytecode():
     41         if TestContract.__bytecode == None:
     42             f = open(os.path.join(data_dir, 'TestContract.bin'))
     43             TestContract.__bytecode = f.read()
     44             f.close()
     45         return TestContract.__bytecode
     46 
     47 
     48     def constructor(self, sender_address, tx_format=TxFormat.JSONRPC, id_generator=None):
     49         code = TestContract.bytecode()
     50         tx = self.template(sender_address, None, use_nonce=True)
     51         tx = self.set_code(tx, code)
     52         return self.finalize(tx, tx_format, id_generator=id_generator)
     53 
     54 
     55     def foo(self, contract_address, sender_address, x, y, tx_format=TxFormat.JSONRPC, id_generator=None):
     56         enc = ABIContractEncoder()
     57         enc.method('foo')
     58         enc.typ(ABIContractType.UINT256)
     59         enc.typ(ABIContractType.BYTES32)
     60         enc.uint256(x)
     61         enc.bytes32(y)
     62         data = add_0x(enc.get())
     63         tx = self.template(sender_address, contract_address, use_nonce=True)
     64         tx = self.set_code(tx, data)
     65         tx = self.finalize(tx, tx_format, id_generator=id_generator)
     66         return tx