To convert this type of ABI used in Ethers.js

const humanReadableAbi = [

// hasClaimed mapping

"function hasClaimed(address) public view returns (bool)",

// Claim function

"function claim(address to, uint256 numberTokens, bytes32[] calldata proof) external",

];

you need to use new Interface and convert it like this

const iface = new Interface(humanReadableAbi);

let jsonAbi: any = iface.format(FormatTypes.json);

console.log(JSON.stringify(JSON.parse(jsonAbi), null, 2));