How to read public variable from contract using ethers.js?

[sentiasa]

I am trying to read public property from contract on chain using ethers.js.

Calling the methods work but I could not manage to read public property (without getter).

The methods works like this:

const ethers = require('ethers');
const provider = new ethers.providers.JsonRpcProvider('https://bsc-dataseed1.binance.org:443');

const contract = new ethers.Contract(address, [
	'function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256)',
], provider);

let works = await contract.getMultiplier(5, 10);

---

However, if I try accessing public property, it doesn't work. In fact, I receive error with the ABI.

const contract = new ethers.Contract(address, [
	'uint256 public totalAllocPoint',
    'PoolInfo[] public poolInfo'
], provider);

Error: unsupported fragment (argument="value", value="uint256 public totalAllocPoint", code=INVALID_ARGUMENT, version=abi/5.2.0)

poolInfo is even different because it needs a parameter.

How can I read totalAllocPoint and poolInfo from the contract?

---

Shouldn't it be like something like this:

let x = await contract.totalAllocPoint;
let y = await contract.poolInfo(2);

Thanks in advance

[zemse]

You can read more about the Human-Readable ABIs.

As until now how it is, you have to write those variables in function form. (Though I think it can make sense to make the work easier by adding support to uint256 public totalAllocPoint @ricmoo)

For the pool info case, you need to know what PoolInfo is.

// considering a dummy struct for example purposes
struct PoolInfo {        
  uint128 accPerShare;        
  uint64 lastRewardBlock;        
  uint64 allocPoint;    
}

Taking the above struct as PoolInfo for example purposes

const contract = new ethers.Contract(address, [
  'function totalAllocPoint() public view returns (uint256)',
  'function poolInfo(uint256 index) public view returns (tuple(uint128 accPerShare, uint64 lastRewardBlock, uint64 allocPoint))'
], provider);