Fails to return reserve outputs from getReserves()

[Samboy76]

Hello,

I have an issue in that I cannot get passed executing code line await pairContract.functions.getReserves(); shown in below code snippet. There is no error caught in trycatch so what am I doing wrong here? Any suggestions please?

const getPair = async (other) => {
	const pairAddress = Pair.getAddress(other, WETH[other.chainId], provider,);
	console.log("pairAddress ", pairAddress);

	const pairContract = new ethers.Contract(
		pairAddress,
		UniswapV2Pair.abi,
		provider,
	);

	console.log("pairContract ", pairContract.address);
	try {
		const reserves = await pairContract.functions.getReserves();
		console.log("reserves ", reserves);
	} catch (error) {
		console.log("error text ", error);
	}
	
	const [reserve0, reserve1] = reserves;
  
	const tokens = [other, WETH[other.chainId]];
	const [token0, token1] = tokens[0].sortsBefore(tokens[1]) ? tokens : [tokens[1], tokens[0]];
  
	const pair = new Pair(new TokenAmount(token0, reserve0), new TokenAmount(token1, reserve1));
	return pair;
};

Truffle v5.5.31 (core: 5.5.31)
Ganache v7.4.3
Solidity - >=0.5.0 <0.9.0 (solc-js)
Node v16.17.0
Web3.js v1.7.4

Thank you

[Florian-S-A-W]

Hi @Samboy76

Did you verify that the Pair address is correct? Does a pair exist for the two tokens?

What version of the SDK are you using? Pair.getAddress only accepts 2 parameters in the latest version.
Please make sure you are using the v2-sdk package and not the deprecated uniswap/sdk

I can not reproduce your issue, calling getReserves on any UniswapV2Pair contract works for me. If the address is correct and the address you are calling is a UniswapV2Pair, this is not an issue with this SDK but either with the RPC provider you are using or with Web3.js.