index.js:1 Failed to fetch multicall chunk [{…}] 1 Error: sending a transaction requires a signer (operation="sendTransaction", code=UNSUPPORTED_OPERATION, version=contracts/5.0.2)
Multicall contract address - https://etherscan.io/address/0xeefba1e63905ef1d7acba5a8513c70307c1ce441#writeContract
Works in Uniswap-interface but throws an error in my code, and I don't know what's wrong
You must provide a signer to perform the solidity method.
You can get a signer from your web3 provider.
You can bind a signer to the Contract like so
import Contract from './artifacts/contracts/Contract.sol/Contract.json'
const contractDeployedAddress = "0xblah";
const provider = new ethers.providers.Web3Provider(window.ethereum)
const signer = provider.getSigner();
const contract = new ethers.Contract(contractDeployedAddress, Contract.abi, signer)
await contract.someMethodThatRequiresSigning();
I have similar situation which is using @web3-react with reference to the uniswap-interface code.
@web3-react base on the ethers.js, and we must execute the State Changing Methods with signer.
I post a sample that I solved.
const { library, account } = useActiveWeb3React();
const contract = getContract(
CONTRACT_ADDRESS,
abi,
library
);
const signer = contract.connect(library.getSigner());
signer.someStateChangingMethods();
This may help you. https://docs.ethers.io/v5/getting-started/#getting-started--writing