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The Etherscan web page shows the creator address of a contract, like this ("Circle: Deployer" in the image, but I'm fine with just the address): USDC contract

Is there a way how to get this address information using the Etherscan API, similar to how the source code and ABI of a contract can be read?

kfx
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  • did you figure it out? I'd love to know as well. Thanks! – bernatfortet Jul 22 '23 at 03:01
  • @bernatfortet did not find an easy way, something like getting all tx for the contract and looking at the sender of the first one could work, but I never got to implement it. – kfx Jul 22 '23 at 18:37

2 Answers2

2

Etherscan/Polygonscan API Solution:

I did finally find the proper endpoint for these requests. You can batch a max of 5 contracts per request. The etherscan API seems more reliable than JSON RPC method mentioned below. Additionally the etherscan API is much faster. Use npm lib node-fetch if in a node-js context. Solution also works with polygonscan:

// You can get an API key on the free-tier of etherscan/polygonscan
const APIKEY="YourApiKey"

async function getContractCreators(
  // Array of contract-address strings (Maximum 5 per API call)
  contracts
){
  const url = https://api.etherscan.io/api?module=contract&action=getcontractcreation&apiKey=${APIKEY}&contractaddresses=${contracts.toString()};
  const req = await fetch(url);
  const res = await req.json()
  // Make sure req was success
  if(res.status!='1'){
    console.warn("Handle req error here",res)
    return []
  }
  res.result.forEach(c => {
    let contract = c.contractAddress; // contract-address
    let creator  = c. contractCreator; // creator-wallet-address
    console.log(" Found Creator"
    console.log("  -> contract :" + contract);
    console.log("  -> creator :" + creator)
  })


return res.result
}


getContractCreators(["0xB83c27805aAcA5C7082eB45C868d955Cf04C337F","0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45","0xe4462eb568E2DFbb5b0cA2D3DbB1A35C9Aa98aad","0xdAC17F958D2ee523a2206206994597C13D831ec7","0xf5b969064b91869fBF676ecAbcCd1c5563F591d0"]);

Old Solution With EVM JSON RPC:

See this answer https://ethereum.stackexchange.com/a/65210/125787

The code looks like this and it may not work if the creator of the contract was another contract and not a wallet.

import Web3 from "web3";

// Here we use alchemy but you can use others http or websocket
const web3 = new Web3("https://eth-mainnet.alchemyapi.io/v2/<YourAPIKey>")


async function search_contract_cretion_block(contract_address) {
    var highest_block = await web3.eth.getBlockNumber();
    var lowest_block = 0;


var contract_code = await web3.eth.getCode(contract_address, highest_block);
if (contract_code == &quot;0x&quot;) {
    console.error(&quot;Contract &quot; + contract_address + &quot; does not exist!&quot;);
    return -1;
}

while (lowest_block &lt;= highest_block) {
    let search_block = parseInt((lowest_block + highest_block) / 2)
    contract_code = await web3.eth.getCode(contract_address, search_block);

    //console.log(highest_block, lowest_block, search_block, contract_code);

    if (contract_code != &quot;0x&quot;) {
        highest_block = search_block;
    } else if (contract_code == &quot;0x&quot;) {
        lowest_block = search_block;
    }

    if (highest_block == lowest_block + 1) {
        return highest_block;
    }
}




}


async function search_contract_creator (contract_address, block) {
    var block = await web3.eth.getBlock(block);


var transactions = block.transactions;

for (let transaction in transactions) {
    let receipt = await web3.eth.getTransactionReceipt(transactions[transaction]);
    if (receipt.contractAddress?.toLowerCase() == contract_address.toLowerCase()) {
        return receipt.from
    }
}

return -1;



}


async function find_contract_creator (contract_address) {
    var block = await search_contract_cretion_block(contract_address);
    var creator = await search_contract_creator(contract_address, block);
    console.log(creator)
    return creator;
}


find_contract_creator("0x40e85735ff7c7230177589b4e52295b899ccc23e");
Llama D'Attore
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1

for get contract creator and creation transaction hash use this service:

https://api.etherscan.io/api?module=contract&action=getcontractcreation&contractaddresses=0x495f947276749Ce646f68AC8c248420045cb7b5e&apikey=YourApiKeyToken

documentation : link

for get contract source code and contract ABI read this document: link

Benyamin Karimi
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