namillum/needing-organisation/examples/js-library-examples/node/queryState.js

Bubble Protocol SDK

//  Copyright (C) 2018 Zilliqa
//
//  This file is part of Zilliqa-Javascript-Library.
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <https://www.gnu.org/licenses/>.

/**
 * Demo Query State : Short example to illustrate how to get contract state from
 * a deployed token.
 */

const { Zilliqa } = require("@zilliqa-js/zilliqa");

const zilliqa = new Zilliqa("https://dev-api.zilliqa.com");

// Standard fungible token deployed on devnet
const tokenContract = "5938fc8af82250ad6cf1da3bb92f4aa005cb2717";

async function test() {
  /**
   * initialising contract class. Contract class is a convenient way for you to use
   * repeatedly call contracts and make queries from.
   *
   * There's two types of "data" in scilla. Mutable fields (available through getState)
   * and immutable fields (cannot be changed once deployed, available through getInit)
   */
  const contract = zilliqa.contracts.at(tokenContract);
  const allState = await contract.getState();
  console.log(`Getting the entire contract state`);
  console.log(allState);

  const initState = await contract.getInit();
  console.log(`Getting the contract init (immutable variables)`);
  console.log(initState);

  console.log(`\n\nGetting a particular field in the contract`);
  const state2 = await contract.getSubState("_balance");
  console.log(state2);

  console.log(`\n\nGetting a particular entry in a map`);
  const state3 = await contract.getSubState("balances", [
    "0x381f4008505e940ad7681ec3468a719060caf796",
  ]);
  console.log(state3);

  /**
   * Don't want to initialise a class as you are just making an adhoc query? Try this.
   */

  console.log(
    `\n\nYou can also get state / substate directly without using the Contract class.`
  );
  const state4 = await zilliqa.blockchain.getSmartContractSubState(
    "0x5938fc8af82250ad6cf1da3bb92f4aa005cb2717",
    "balances",
    ["0x381f4008505e940ad7681ec3468a719060caf796"]
  );
  console.log(state4.result);

  console.log(`\n\nGet substate using batch api.`);
  const req1 = [
    "5938fc8af82250ad6cf1da3bb92f4aa005cb2717",
    "balances",
    ["0x381f4008505e940ad7681ec3468a719060caf796"],
  ];
  const req2 = [
    "5938fc8af82250ad6cf1da3bb92f4aa005cb2717",
    "balances",
    ["0xa476fcedc061797fa2a6f80bd9e020a056904298"],
  ];

  const state5 = await zilliqa.blockchain.getSmartContractSubStateBatch([
    req1,
    req2,
  ]);

  const batchResult = JSON.stringify(state5.batch_result);
  console.log(batchResult);
}

test();