ethereum.py

gistfile1.txt

    import json
    import time
    from web3 import Web3, HTTPProvider,TestRPCProvider
    from solc import compile_source
    from web3.contract import ConciseContract
       
    contract_source_code = '''
    pragma solidity ^0.4.11;
        
    contract contract_log {
    string name;
    string time;
    string product;
       
    function contract_log(){
        name='kk';
        }
    function setLog(string a, string b, string c) public {
        name = a;
        time = b;
        product = c;
        }
      
       
    function getLog() constant returns (string, string, string) {
        return (name, time, product);
    }
     
    }
    '''
       
    compiled_sol = compile_source(contract_source_code) # Compiled source code
    contract_interface = compiled_sol['<stdin>:contract_log']
     
    provider = HTTPProvider('http://0.0.0.0:9945')
    w3 = Web3(provider)
    contract = w3.eth.contract(contract_interface['abi'], 
    bytecode=contract_interface['bin'])
    tx_hash = contract.deploy(transaction={'from': w3.eth.coinbase, 'gas':50000000})
    print (tx_hash)
    while w3.eth.getTransactionReceipt(tx_hash) is None:
        print (w3.eth.getTransactionReceipt(tx_hash))
     
    contract_address = w3.eth.getTransactionReceipt(tx_hash).contractAddress
    print (contract_address)
    contract_instance = w3.eth.contract(contract_interface['abi'], 
    contract_address, ContractFactoryClass=ConciseContract)
    print (contract_instance)
    print (contract_instance.setLog('tlatk', '12', 'product',transact={'from': 
    w3.eth.coinbase,'gas':3000000}))
    contract_instance.set(12,transact={'from': w3.eth.coinbase,'gas':3000000})
    print (contract_instance.getLog())
    print('Contract value: {}'.format(contract_instance.getLog()))