Get deployed contract by address - solidity

Question

According to this doc. We can use ethers.getContract to get deployed contract.
I have deployed my contract at 0x33F4623337b8F9EDc9529a79F0d68B2BeC98d5E2 and my creator address is 0x6e0F5B57FEdc8911722c92dcD5D7D0cf69ceA385 now to get contract i am doing
deployedContract = await ethers.getContract(
"0x33F4623337b8F9EDc9529a79F0d68B2BeC98d5E2",
"0x6e0F5B57FEdc8911722c92dcD5D7D0cf69ceA385"
)
But its throwing error
Error: No Contract deployed with name 0x33F4623337b8F9EDc9529a79F0d68B2BeC98d5E2
But you can see contract is deployed https://goerli.etherscan.io/address/0x33F4623337b8F9EDc9529a79F0d68B2BeC98d5E2
Can someone help me here?

Answer 1

It's just simple.
You can use getContractAt function.
getContractAt: <T extends ethers.Contract>(
nameOrAbi: string | any[],
address: string,
signer?: ethers.Signer | string
) => Promise<T>;
So in your case, it could be:
const raffle = await ethers.getcontractAt(
"Raffle",
"0x33F4623337b8F9EDc9529a79F0d68B2BeC98d5E2",
"0x6e0F5B57FEdc8911722c92dcD5D7D0cf69ceA385"
);
In addition, you got the error since you used the contract address for the contract name.
getContract: <T extends ethers.Contract>(
name: string,
signer?: ethers.Signer | string
) => Promise<T>;

Answer 2

The 0x33F4... contract is deployed on the Goerli testnet, and it's available only on this network. Your post doesn't state to which network is your ethers provider connected to, but based on the context I'm assuming it's a different network - for example the local emulated hardhat network (which is the default option if you don't specify any provider) or the Ethereum mainnet.
The getContract() function is present only in historic versions of the ethers package. Based on the documentation that you linked, it seems that you're using version 0.0.1 (and it seems that it's not a misconfiguration of the docs page, as the 0.0.1 version in fact exists). Current version (January 2023) of the package is 5.4 - you can find its docs at https://docs.ethers.io/v5/.
Second argument in the originally linked documentation is contractInterface. Which is not the deployer address (passed in your example) but an ABI (Application Binary Interface) - a JSON-formatted specification of public and external methods of the contract and its events. Example of such ABI JSON can be found in the original docs a below the Example headline.
Each contract usually has its own unique ABI that is generated from its source code during contract compilation, but you can also use generic ABI for standardized functions. For example all ERC-20 token contracts have the same functions required by the ERC-20 standard (and these functions are included in the generic ERC-20 ABI), plus they might implement some other functions on top of that (these custom functions are not in the generic ABI).
Here's an example of interacting with the contract with the current version (0.5.4) of ethers, connected to a Goerli network provider:
const { ethers } = require("ethers");
// A 3rd party provider that is connected to the Goerli network
const provider = new ethers.providers.JsonRpcProvider("https://goerli.infura.io/v3/<your_api_key>");
const CONTRACT_ADDRESS = "0x33F4623337b8F9EDc9529a79F0d68B2BeC98d5E2";
// ABI JSON of this specific contract, not included in the answer for readability
const CONTRACT_ABI = [/* ... */];
async function run() {
const myContract = new ethers.Contract(CONTRACT_ADDRESS, CONTRACT_ABI, provider);
// `getEntryFee()` function defined in the ABI JSON as well as in the actual contract
const entryFee = await myContract.getEntryFee();
console.log(entryFee.toString());
}
run();
Note: Above is a standalone NodeJS script that is not using the Hardhat framework. You can also add the network in your Hardhat config file, and then run a script from their scripts folder that automatically includes ethers and connects to the selected provider.
require("#nomicfoundation/hardhat-toolbox");
module.exports = {
solidity: "0.8.17",
networks: {
goerli: {
url: "https://goerli.infura.io/v3/<your_api_key>",
accounts: [<private_key>, <private_key>], // for sending transactions
}
}
};
npx hardhat run --network goerli scripts/myScript.js

Answer 3

Add this to hardhat.config.js
networks: {
goerli: {
url: `https://goerli.infura.io/v3/${process.env.INFURA_API_KEY}`,
accounts: [process.env.PRI_KEY],
},
},
create .env and add your env variables
// I am loading env variables
env $(cat .env) npx hardhat run --network goerli scripts/yourScriptFile.js