/ Example: Delegate EOA to execute multicall contract
/ Source: Based on EIP-7702 specification examples
import { ethers } from "ethers";
async function createDelegatedMulticall() {
const wallet = new ethers.Wallet(privateKey, provider);
const multicallAddress = "0x..."; / Deployed multicall contract
/ Step 1: Create authorization for code delegation
const authorization = {
chainId: 9000, / Your Cosmos EVM chain ID
address: multicallAddress, / Contract to delegate code from
nonce: await wallet.getNonce(), / Current account nonce
};
/ Step 2: Sign authorization (EIP-712 format)
const authSignature = await signAuthorization(authorization, wallet);
/ Step 3: Create SetCode transaction (Type 4)
const tx = {
type: 4, / SetCodeTxType
chainId: 9000,
nonce: authorization.nonce + 1, / Must increment after authorization
gasLimit: 500000,
gasFeeCap: ethers.parseUnits("20", "gwei"),
gasTipCap: ethers.parseUnits("1", "gwei"),
to: wallet.address, / Self-delegation
value: 0,
data: "0x", / No direct call data
accessList: [],
authorizationList: [{
chainId: authorization.chainId,
address: authorization.address,
nonce: authorization.nonce,
v: authSignature.v,
r: authSignature.r,
s: authSignature.s,
}]
};
/ Step 4: Send transaction - EOA executes as multicall contract
return await wallet.sendTransaction(tx);
}
