setConfig doesnt working as expected

[Zahar44]

I checked code of web3-eth-contract/lib/commonjs/contract.js and from what I see it looks like this.config.contractDataInputFill used only to set it to this._dataInputFill and when called setConfig with contractDataInputFill it doesnt override this._dataInputFill.

Expected behavior

this code should override transaction input/data behavior

const token = new this.web3.eth.Contract(ERC20Abi);
token.setConfig({ contractDataInputFill: 'both' });

Actual behavior

Transaction sent with behavior of initial contractDataInputFill value

Steps to reproduce the behavior

this should throw exception if used in local hardhat node

const token = new this.web3.eth.Contract(ERC20Abi);
token.setConfig({ contractDataInputFill: 'both' });
token.methods.decimals().call();

Logs

this will log 'input'

const token = new this.web3.eth.Contract(ERC20Abi);
token.setConfig({ contractDataInputFill: 'both' });
console.log(token['_dataInputFill']);

Environment

"web3": "^4.2.1"

[Zahar44]

For now I'm using this workaround and it works

(token as any)['_dataInputFill'] = 'both';

[luu-alex]

thanks for submitting this issue, theres a fix to removing _dataInputFill all together and just use config
#6555
this should be merged in soon

[Muhammad-Altabba]

Many thanks @Zahar44 for opening the issue and suggesting a workaround. This is helpful till the issue is fixed at #6555.
However, I am closing this issue in favor of keeping the discussion on #6555.