Ethereum: How to get the amount of token0 and token1 from a Uniswap V3 pool in JS

I can provide you with an example article on how to retrieve the amount of token0 and token1 from a Uniswap V3 pool in JavaScript using the Uniswap library.

Retrieving token amounts from the Uniswap pool

Uniswap V3 provides an API to retrieve information about token balances, including amounts held in a pool. In this article, we will explain how to use the uniswap.v3.Pool object to retrieve the amount of token0 and token1 from a Uniswap V3 pool.

Prerequisites

Before you begin, make sure you have the following dependencies installed:

npm install uniswap-js

Sample code

constant {
UniswapV3 interface,
} = require('uniswap-js');
async function getPoolTokenAmounts() {
// Set up Uniswap V3 API instance
const api = new UniswapV3Interface({
provider: ' // Replace with your Infura project ID
apiKey: 'YOUR_API_KEY',
});
// Create a pool object for the specified pool (e.g. Uniswap V3 testnet pool)
const pool = await api.getPool('0x...'); // Replace with the pool address
Attempt {
// Get the amount of token0 and token1 from the pool
const token0Amount = await pool.getBalanceOf('token0');
const token1Amount = await pool.getBalanceOf('token1');
return { token0Amount, token1Amount };
} catch (error) {
console.error(error);
return null;
}
}
// Usage example:
getPoolTokenAmounts().then((results) => {
if (results) {
const { token0Amount, token1Amount } = results;
console.log(Token0 amount: ${token0Amount});
console.log(Token1 amount: ${token1Amount});
}
});

Explanation

In this code example:

• We create a new instance of the UniswapV3Interface class, passing our Infura project ID and API key as arguments.

• We then create a pool object for the specified pool (say, the Uniswap V3 testnet pool).

• We use the getBalanceOf method to retrieve the amount of token0 and token1 from the pool.

• Finally, we return an object with the retrieved amounts.

Troubleshooting Tips

If you are having trouble retrieving token amounts using this code, here are some troubleshooting tips:

• Make sure you have replaced the placeholder addresses (0x...) with the actual address of your Uniswap V3 pool.

• Verify that the Infura project ID and API key are correct and valid.

• Please refer to Uniswap documentation for any API changes or requirements for using Uniswap V3.

Following this article should allow you to retrieve the amount of token0 and token1 from a Uniswap V3 pool in JavaScript. If you run into any issues or have any other questions, please feel free to contact us!