pass in bytes32

[ciasom]

For a constructor function with bytes32 parameter, how can I pass in the data (e.g. 0x18e070eea80451e1210b1e9755b04c20af10d531c0a0e9fbdd446563c22fc08c) when deploying it via the yml file. I tried 0x18e070eea80451e1210b1e9755b04c20af10d531c0a0e9fbdd446563c22fc08c with/without quotes. Both didn't work.

[miohtama]

Which parameter is this? I think you are doing it correctly, but I am not sure.

[miohtama]

Can you also provide a traceback.

[ciasom]

The console log is as follows when single quotes used. The function is_encodable in web3 module (web3.utils.abi) returns false since it requires the input as a string with length<=32 for type bytes32. But I think this is fine. I guess the problem should be at the stage of reading the data from yml file. There should be something to convert such value into bytes data, instead of treating such value as a normal string.

If without single quotes, the value was treated as a number and converted to decimal number. The log printed something like:
Starting PresaleManager deployment, with arguments {'_commitment': 11252061538261140815797529001414997560767999792685399466878375241369984680076}
And it can't pass the check in is_encodable either since the value is not a string.

The italic bold text was something from web3 since I added some prints.

(venv) $ deploy-contracts --deployment-file=crowdsales/presale.yml --deployment-name=testnet --address=0x627306090abaB3A6e1400e9345bC60c78a8BEf57
Web3 provider is RPC connection http://127.0.0.1:7545
Owner address is 0x627306090abaB3A6e1400e9345bC60c78a8BEf57
Owner balance is 100 ETH
Starting PresaleManager deployment, with arguments {'_commitment': '0x18e070eea80451e1210b1e9755b04c20af10d531c0a0e9fbdd446563c22fc08c'}
[{'name': b'_commitment', 'type': b'bytes32'}]
('0x18e070eea80451e1210b1e9755b04c20af10d531c0a0e9fbdd446563c22fc08c',)
Types: [b'bytes32']
type: b'bytes32' . value: 0x18e070eea80451e1210b1e9755b04c20af10d531c0a0e9fbdd446563c22fc08c
2: bytes 32 []
66 32
One or more arguments could not be encoded to the necessary ABI type. Expected types are: bytes32
Traceback (most recent call last):
File "Downloads/ico-master/ico/deploy.py", line 66, in deploy_contract
contract, txhash = chain.provider.deploy_contract(contract_name, deploy_transaction=transaction, deploy_kwargs=kwargs)
File "Downloads/ico-master/venv/lib/python3.5/site-packages/populus/contracts/provider.py", line 121, in deploy_contract
kwargs=deploy_kwargs,
File "Downloads/ico-master/venv/lib/python3.5/site-packages/web3/contract.py", line 307, in deploy
deploy_transaction['data'] = cls._encode_constructor_data(args, kwargs)
File "Downloads/ico-master/venv/lib/python3.5/site-packages/eth_utils/string.py", line 89, in inner
return force_obj_to_text(fn(*args, **kwargs))
File "Downloads/ico-master/venv/lib/python3.5/site-packages/web3/contract.py", line 748, in _encode_constructor_data
cls._encode_abi(constructor_abi, arguments, data=cls.bytecode)
File "Downloads/ico-master/venv/lib/python3.5/site-packages/web3/contract.py", line 703, in _encode_abi
', '.join(argument_types),
TypeError: One or more arguments could not be encoded to the necessary ABI type. Expected types are: bytes32

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "Downloads/ico-master/venv/bin/deploy-contracts", line 9, in
load_entry_point('ico', 'console_scripts', 'deploy-contracts')()
File "Downloads/ico-master/venv/lib/python3.5/site-packages/click/core.py", line 722, in call
return self.main(*args, **kwargs)
File "Downloads/ico-master/venv/lib/python3.5/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "Downloads/ico-master/venv/lib/python3.5/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "Downloads/ico-master/venv/lib/python3.5/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/lib/python3.5/contextlib.py", line 77, in exit
self.gen.throw(type, value, traceback)
File "Downloads/ico-master/venv/lib/python3.5/site-packages/click/core.py", line 87, in augment_usage_errors
yield
File "Downloads/ico-master/venv/lib/python3.5/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "Downloads/ico-master/ico/cmd/deploycontracts.py", line 31, in main
deploy_crowdsale_from_file(project, deployment_file, deployment_name, address)
File "Downloads/ico-master/ico/deploy.py", line 289, in deploy_crowdsale_from_file
return _deploy_contracts(project, chain, web3, yaml_filename, chain_data, deploy_address)
File "Downloads/ico-master/ico/deploy.py", line 273, in _deploy_contracts
runtime_data, statistics, contracts = deploy_crowdsale(project, chain, yaml_filename, chain_data, deploy_address)
File "Downloads/ico-master/ico/deploy.py", line 134, in deploy_crowdsale
contracts[name] = deploy_contract(project, chain, deploy_address, expanded_contract_def, chain_name, need_unlock=need_unlock)
File "Downloads/ico-master/ico/deploy.py", line 69, in deploy_contract
raise RuntimeError("Could not deploy contract {}, constructor arguments {}".format(contract_name, kwargs)) from e
RuntimeError: Could not deploy contract PresaleManager, constructor arguments {'_commitment': '0x18e070eea80451e1210b1e9755b04c20af10d531c0a0e9fbdd446563c22fc08c'}

[kivo360]

I've been running into the exact same error with just a simple token contract. With the following code:

with project.get_chain(chain_name) as chain:
    web3 = chain.web3
#     print(web3.eth.accounts)
#     print(web3.eth.blockNumber)

    Contract = get_contract_by_name(chain, "CrowdsaleToken")
    contract = Contract(address=contract_address)
    
    pp.pprint(contract.abi)

I get this response:

[   {   'constant': False,
        'inputs': [   {'name': 'addr', 'type': 'address'},
                      {'name': 'state', 'type': 'bool'}],
        'name': 'setTransferAgent',
        'outputs': [],
        'payable': False,
        'stateMutability': 'nonpayable',
        'type': 'function'},
    {   'constant': True,
        'inputs': [],
        'name': 'mintingFinished',
        'outputs': [{'name': '', 'type': 'bool'}],
        'payable': False,
        'stateMutability': 'view',
        'type': 'function'},
    {   'constant': True,
        'inputs': [],
        'name': 'decimals',
        'outputs': [{'name': '', 'type': 'uint256'}],
        'payable': False,
        'stateMutability': 'view',
        'type': 'function'},
    {   'constant': False,
        'inputs': [   {'name': 'receiver', 'type': 'address'},
                      {'name': 'amount', 'type': 'uint256'}],
        'name': 'mint',
        'outputs': [],
        'payable': False,
        'stateMutability': 'nonpayable',
        'type': 'function'},
    {   'constant': True,
        'inputs': [{'name': '', 'type': 'address'}],
        'name': 'mintAgents',
        'outputs': [{'name': '', 'type': 'bool'}],
        'payable': False,
        'stateMutability': 'view',
        'type': 'function'},
    {   'constant': False,
        'inputs': [   {'name': 'addr', 'type': 'address'},
                      {'name': 'state', 'type': 'bool'}],
        'name': 'setMintAgent',
        'outputs': [],
        'payable': False,
        'stateMutability': 'nonpayable',
        'type': 'function'},
    {   'constant': False,
        'inputs': [{'name': 'value', 'type': 'uint256'}],
        'name': 'upgrade',
        'outputs': [],
        'payable': False,
        'stateMutability': 'nonpayable',
        'type': 'function'},
    {   'constant': False,
        'inputs': [   {'name': '_name', 'type': 'string'},
                      {'name': '_symbol', 'type': 'string'}],
        'name': 'setTokenInformation',
        'outputs': [],
        'payable': False,
        'stateMutability': 'nonpayable',
        'type': 'function'},
    {   'constant': True,
        'inputs': [],
        'name': 'released',
        'outputs': [{'name': '', 'type': 'bool'}],
        'payable': False,
        'stateMutability': 'view',
        'type': 'function'},
    {   'constant': True,
        'inputs': [],
        'name': 'canUpgrade',
        'outputs': [{'name': '', 'type': 'bool'}],
        'payable': False,
        'stateMutability': 'view',
        'type': 'function'}
    ]

This would suggest that the ABI has all the functions I need, but when I call a contract I get the following:

with project.get_chain(chain_name) as chain:
    web3 = chain.web3
#     print(web3.eth.accounts)
#     print(web3.eth.blockNumber)

    Contract = get_contract_by_name(chain, "CrowdsaleToken")
    contract = Contract(address=contract_address)
    
    print(contract.call().canUpgrade())
#     pp.pprint(contract.call().totalSupply)

We get:

---------------------------------------------------------------------------
InsufficientDataBytes                     Traceback (most recent call last)
~/ico/venv/lib/python3.5/site-packages/web3/contract.py in call_contract_function(contract, function_name, transaction, *args, **kwargs)
    778     try:
--> 779         output_data = decode_abi(output_types, return_data)
    780     except DecodingError as e:

~/ico/venv/lib/python3.5/site-packages/eth_abi/abi.py in decode_abi(types, data)
    107     stream = BytesIO(data)
--> 108     return decoder(stream)

~/ico/venv/lib/python3.5/site-packages/eth_abi/decoding.py in __call__(self, stream)
    101     def __call__(self, stream):
--> 102         return self.decode(stream)
    103 

~/ico/venv/lib/python3.5/site-packages/eth_utils/functional.py in inner(*args, **kwargs)
     32         def inner(*args, **kwargs):
---> 33             return callback(fn(*args, **kwargs))
     34 

~/ico/venv/lib/python3.5/site-packages/eth_abi/decoding.py in decode(cls, stream)
    139             else:
--> 140                 yield decoder(stream)
    141 

~/ico/venv/lib/python3.5/site-packages/eth_abi/decoding.py in __call__(self, stream)
    101     def __call__(self, stream):
--> 102         return self.decode(stream)
    103 

~/ico/venv/lib/python3.5/site-packages/eth_abi/decoding.py in decode(cls, stream)
    164     def decode(cls, stream):
--> 165         raw_data = cls.read_data_from_stream(stream)
    166         data, padding_bytes = cls.split_data_and_padding(raw_data)

~/ico/venv/lib/python3.5/site-packages/eth_abi/decoding.py in read_data_from_stream(cls, stream)
    246                     cls.data_byte_size,
--> 247                     len(data),
    248                 )

InsufficientDataBytes: Tried to read 32 bytes.  Only got 0 bytes

The above exception was the direct cause of the following exception:

BadFunctionCallOutput                     Traceback (most recent call last)
<ipython-input-48-1255d7268996> in <module>()
      7     contract = Contract(address=contract_address)
      8 
----> 9     print(contract.call().canUpgrade())
     10 #     pp.pprint(contract.call().totalSupply)

~/ico/venv/lib/python3.5/site-packages/web3/contract.py in call_contract_function(contract, function_name, transaction, *args, **kwargs)
    799                 )
    800             )
--> 801         raise_from(BadFunctionCallOutput(msg), e)
    802 
    803     normalized_data = [

~/ico/venv/lib/python3.5/site-packages/web3/utils/exception_py3.py in raise_from(my_exception, other_exception)
      1 def raise_from(my_exception, other_exception):
----> 2     raise my_exception from other_exception

BadFunctionCallOutput: Could not transact with/call contract function, is contract deployed correctly and chain synced?