Helper module for web3py beta 4
The main python file shows some examples on how to use the helper, it is very similar to the following documentation
This is how you can generate a local encrypted new account, save it locally and load it
account = Account(web3).new().save(accountfilepath, accountpassword)
account = Account(web3).load(accountfilepath, accountpassword)
Send money from the current local account to an address
account.sendTo(to, wei, config.chainId)
How to deploy a smart contract on the block chain
scd = SmartContractDeployer(web3).loadSolidity(contractfilepath)
scd.compileSol()
scd.saveCompiledSol(compiledsolpath)
tr = scd.deploy(account.account.address,["MyArgs"],contractName="<stdin>:greeter", chainId=config.chainId)
tx = account.launchTransaction(tr)
scd.saveTx(tx, compiledfiletx)
Users have to manually validate every transaction is gonna sign for
You need to re-ling to your published smart contract with the compiled smart contract and a transaction hash
scc = SmartContractCaller(web3, compiledfiletx, compiledsolpath, "<stdin>:greeter")
address = account.account.address
n = web3.eth.getTransactionCount(address)
To read a function or value/state directly on the Ethereum node
print('Contract value: {}'.format(scc.contractInstance.call().greet()))
To use a function that will cost gas
prepared_transaction = scc.contractInstance.buildTransaction().add(1)
updated_transaction = scc.updateTransaction(address, prepared_transaction, gas=50000, gasPrice=18000000000)
tx = account.launchTransaction(updated_transaction)
Some pretty printing functions (for block and transaction) can be used on filters, for example :
- Code
- Basic documentation
- Clean the code
- Renaming methods
- Refactoring
- Add checks
- Import ChainId from web3, not from config
This issue is not related to my code, but can occur if using a Clique consensus POA (tested on an Azure private Ethereum Consortium).
In this case extraData contain more information than expected:
File "/usr/local/lib/python3.5/dist-packages/web3-4.0.0b5-py3.5.egg/web3/middleware/pythonic.py", line 94, in to_hexbytes
result, len(result), num_bytes
ValueError: The value HexBytes('0x...') is 97 bytes, but should be 32
Just edit pythonic.py and modify the following code :
line 80: def to_hexbytes(num_bytes, val, variable_length=False, override=True):
...
line 91: else:
line 92: if override:
line 93: return result
line 94: else:
line 95: raise ValueError(
...
line 169: 'extraData': to_hexbytes(32, variable_length=True),
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