constructor-argument-detector
v1.1.5
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๐ Terminal util to find constructor arguments when creating a contract in ethereum based networks
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constructor-argument-detector
๐ Terminal util to find constructor arguments when creating a contract in ethereum based networks
Get Started
npm install -g constructor-argument-detector
Usage
Usage: constructor-detector [options] <transaction-hash-of-creation-contract>
CLI to find constructor argument in ethereum based chain contracts
Arguments:
hash Tx of creating transactions
Options:
-e, --endpoint <url> RPC endpoint url
-t, --types <string> Constructor types (Example: uint,string,address)
-h, --help display help for command
Example
user@macbook ~ % constructor -e https://bsc-dataseed1.binance.org \
-t address,address \
0x1bfbff8411ed44e609d911476b0d35a28284545b690902806ea0a7ff0453e931
(address) 0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73
(address) 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c
Or set RRC endpoint to env
user@macbook ~ % export WEB3_ENDPOINT=https://bsc-dataseed1.binance.org
user@macbook ~ % constructor -t address,address,address,address,address,uint 0xc0e636dcebeeed30525f1ca2214b93331fe2263adc87cd467d57d4ff04257d4d
(address) 0x0E09FaBB73Bd3Ade0a17ECC321fD13a19e81cE82
(address) 0xa5f8C5Dbd5F286960b9d90548680aE5ebFf07652
(address) 0x7a2C5c265bDC9724dACe715c5FF60Eea40E07F47
(address) 0xeCc90d54B10ADd1ab746ABE7E83abe178B72aa9E
(address) 0xeCc90d54B10ADd1ab746ABE7E83abe178B72aa9E
(uint) 0
Or using as library
const detector = require("constructor-argument-detector");
detector.parse({
txHash: "0xc0e636dcebeeed30525f1ca2214b93331fe2263adc87cd467d57d4ff04257d4d",
endpoint: "https://bsc-dataseed1.binance.org/",
types: ["address", "address", "address", "address", "address", "uint"]
}).then(result => {
console.log(result);
})
/* Output:
[
{
type: 'address',
value: '0x0E09FaBB73Bd3Ade0a17ECC321fD13a19e81cE82'
},
{
type: 'address',
value: '0xa5f8C5Dbd5F286960b9d90548680aE5ebFf07652'
},
{
type: 'address',
value: '0x7a2C5c265bDC9724dACe715c5FF60Eea40E07F47'
},
{
type: 'address',
value: '0xeCc90d54B10ADd1ab746ABE7E83abe178B72aa9E'
},
{
type: 'address',
value: '0xeCc90d54B10ADd1ab746ABE7E83abe178B72aa9E'
},
{
type: 'uint',
value: BigNumber { _hex: '0x00', _isBigNumber: true }
}
]
*/
To resolve the issue, we need data from tx.input and the actual smart contract code. You can extract this data yourself
const detector = require('constructor-argument-detector');
const ethers = require('ethers');
const provider = new ethers.providers.JsonRpcProvider("https://bsc-dataseed1.binance.org/");
provider.getTransaction('0xc0e636dcebeeed30525f1ca2214b93331fe2263adc87cd467d57d4ff04257d4d').then(async (tx) => {
const data = tx.data;
const addressOfContract = '0x45c54210128a065de780C4B0Df3d16664f7f859e';
const byteCode = await provider.getCode(addressOfContract);
const result = detector.offchainParse({
txData: data,
byteCode,
types: ["address", "address", "address", "address", "address", "uint"]
})
console.log(result);
})