hardhat-logger

_Show transaction params before hardhat send transaction to network_

Installation

``bash
npm install hardhat-logger
`

or

`bash
yarn add hardhat-logger
`

Import the plugin in your hardhat.config.ts or hardhat.config.js:

`ts
//hardhat.config.ts

import {logger, MatcherType} from 'hardhat-logger'//or const {logger} = require('hardhat-logger');

// type MatcherType = string | string[] | RegExp | ((args: {method: string; params?: unknown[] | object;}) => boolean);

const matcher: MatcherType = /eth_getBalance/;
logger(matcher); // or without arguments logger()
`

here what you see if you run npx hardhat test in Lock hardhat example
`
...
{
method: 'eth_getBalance',
params: [
'0x5FbDB2315678afecb367f032d93F642f64180aa3',
'0x3'
]
}
{
method: 'eth_getBalance',
params: [
'0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266',
'0x2'
]
}
...
`

Use the function for more complex filtering. It's also possible to change args to check some guesses on the fly.

`ts
//show only 'eth_sendTransaction' and change gas for the transaction
const matcher = (args: {method: string, params?: any}) => {
if(args.method === 'eth_sendTransaction') {
args.params[0].gas = '0x1C9C38';
return true;
}

return false;
};

logger(matcher);
`

and result

`
...
{
method: 'eth_sendTransaction',
params: [
{
gas: '0x1C9C38',
from: '0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266',
to: '0x5fbdb2315678afecb367f032d93f642f64180aa3',
data: '0x3ccfd60b',
maxFeePerGas: '0x32b1a62c',
maxPriorityFeePerGas: '0x0'
}
]
}
...
``