Get Pool Reserves

Getting the reserves data for a liquidity pool using SaucerSwap’s REST API is also a suitable alternative. For more information, see Get liquidi ty pool reserves (V1). The pool metadata includes the reserve data.

Get Pool Reserves via REST API

Fetch all HTS token balances for a pool via Mirror Node’s REST API.

Code Overview

REST API

Resources:

Typescript

const apiUrl = `/api/v1/accounts/${poolContractId}/tokens`;  
const response = await axios.get(`${mirrorNodeBaseUrl}${apiUrl}`);
const tokens = response.data.tokens;

for (const token of tokens ) {
  console.log(`Token id: ${token.token_id}, Reserve: ${token.balance}`);
}

Get Pool Reserves via JSON RPC

Fetch all HTS token balances for a pool using the getReserves() solidity function via Mirror Node’s JSON RPC Relay.

Function name: getReserves

⛽ No gas cost

function getReserves() external view returns (
  uint112 reserve0, 
  uint112 reserve1, 
  uint32 blockTimestampLast
);

function getReserves()
  public
  view
  returns (
    uint112 _reserve0,
    uint112 _reserve1,
    uint32 _blockTimestampLast
  )
{
  _reserve0 = reserve0;
  _reserve1 = reserve1;
  _blockTimestampLast = blockTimestampLast;
}

Code Overview

JSON RPC

Resources:

Typescript

import * as ethers from 'ethers'; //V6

//Set one of Hedera's JSON RPC Relay as the provider
const provider = new ethers.JsonRpcProvider(hederaJsonRelayUrl, '', {
  batchMaxCount: 1, //workaround for V6
});

//load abi data containing Pair's getReserves() function
const interfaces = new ethers.Interface(abi);

const poolContract = new ethers.Contract(poolAddress, interfaces.fragments, provider);
const result = await poolContract.getReserves();
const reserve0 = result.reserve0; //in token's smallest unit
const reserve1 = result.reserve1; //in token's smallest unit
const block = result.blockTimestampLast;

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