klaytn-multicall-kas

Gets multiple results with a single contract call

Installation

npm install klaytn-multicall-kas
yarn add klaytn-multicall-kas

API

• .aggregate(calls): Excute calls in a single request
• .getKlaytnBalanceMethod(address): return getEthBalance(address) method
• .getKlaytnBalance(address): return klaytn balance in address
• .getBlockHash(blockNumber): return blockHash
• .getLastBlockHash(): return last block hash
• .getCurrentBlockTimestamp(): return current block timestamp
• .getCurrentBlockDifficulty(): return current block difficulty
• .getCurrentBlockGasLimit(): return current block gas limit
• .getCurrentBlockCoinbase(): return current block coinbase

Example

require("dotenv").config();

const { Provider } = require("klaytn-multicall-kas");

const CaverExtKAS = require("caver-js-ext-kas");

const { CYPRESS_CHAIN_ID, ACCESS_KEY_ID, SECRET_ACCESS_KEY } = process.env;

const caver = new CaverExtKAS(
  CYPRESS_CHAIN_ID,
  ACCESS_KEY_ID,
  SECRET_ACCESS_KEY
);

const provider = new Provider(caver);
const erc20ABI = require("./abi/erc20");

const run = async () => {
  // Klay - KSP Liquidity Pool in KlaySwap
  const klaySwapAndKlayPoolAddress =
    "0x34cf46c21539e03deb26e4fa406618650766f3b9";

  const klaySwapProtocolContractAddress =
    "0xc6a2ad8cc6e4a7e08fc37cc5954be07d499e7654";

  const klaySwapProtocolContract = new caver.contract(
    erc20ABI,
    klaySwapProtocolContractAddress
  );

  const calls = [
    provider.getKlayBalanceMethod(klaySwapAndKlayPoolAddress),
    klaySwapProtocolContract.methods.balanceOf(klaySwapAndKlayPoolAddress),
  ];

  const [klayBalance, kspBalance] = await provider.aggregate(calls);

  console.log(`
  klayBalance: ${klayBalance.toString()}
  kspBalance: ${kspBalance.toString()}
  `);
};

run();

Test

npm run test