Zilliqa-JavaScript-Library/examples/node/queryState.js at v2.1.0 · javascriptit/Zilliqa-JavaScript-Library · GitHub

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// 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);

}

test();

Zilliqa-JavaScript-Library/examples/node/queryState.js at v2.1.0 · javascriptit/Zilliqa-JavaScript-Library · GitHub

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