Zilliqa-JavaScript-Library/examples/node/helloWord.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/>.

const { BN, Long, bytes, units } = require('@zilliqa-js/util');

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

const {

toBech32Address,

getAddressFromPrivateKey,

} = require('@zilliqa-js/crypto');

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

// These are set by the core protocol, and may vary per-chain.

// You can manually pack the bytes according to chain id and msg version.

// For more information: https://apidocs.zilliqa.com/?shell#getnetworkid

const chainId = 333; // chainId of the developer testnet

const msgVersion = 1; // current msgVersion

const VERSION = bytes.pack(chainId, msgVersion);

// Populate the wallet with an account

const privateKey =

'3375F915F3F9AE35E6B301B7670F53AD1A5BE15D8221EC7FD5E503F21D3450C8';

zilliqa.wallet.addByPrivateKey(privateKey);

const address = getAddressFromPrivateKey(privateKey);

console.log(`My account address is: ${address}`);

console.log(`My account bech32 address is: ${toBech32Address(address)}`);

async function testBlockchain() {

try {

// Get Balance

const balance = await zilliqa.blockchain.getBalance(address);

// Get Minimum Gas Price from blockchain

const minGasPrice = await zilliqa.blockchain.getMinimumGasPrice();

// Account balance (See note 1)

console.log(`Your account balance is:`);

console.log(balance.result);

console.log(`Current Minimum Gas Price: ${minGasPrice.result}`);

const myGasPrice = units.toQa('1000', units.Units.Li); // Gas Price that will be used by all transactions

console.log(`My Gas Price ${myGasPrice.toString()}`);

const isGasSufficient = myGasPrice.gte(new BN(minGasPrice.result)); // Checks if your gas price is less than the minimum gas price

console.log(`Is the gas price sufficient? ${isGasSufficient}`);

// Send a transaction to the network

console.log('Sending a payment transaction to the network...');

const tx = await zilliqa.blockchain.createTransactionWithoutConfirm(

// Notice here we have a default function parameter named toDs which means the priority of the transaction.

// If the value of toDs is false, then the transaction will be sent to a normal shard, otherwise, the transaction.

// will be sent to ds shard. More info on design of sharding for smart contract can be found in.

// https://blog.zilliqa.com/provisioning-sharding-for-smart-contracts-a-design-for-zilliqa-cd8d012ee735.

// For payment transaction, it should always be false.

zilliqa.transactions.new(

{

version: VERSION,

toAddr: '0xA54E49719267E8312510D7b78598ceF16ff127CE',

amount: new BN(units.toQa('1', units.Units.Zil)), // Sending an amount in Zil (1) and converting the amount to Qa

gasPrice: myGasPrice, // Minimum gasPrice veries. Check the `GetMinimumGasPrice` on the blockchain

gasLimit: Long.fromNumber(1),

false,

);

// check the pending status

const pendingStatus = await zilliqa.blockchain.getPendingTxn(tx.id);

console.log(`Pending status is: `);

console.log(pendingStatus);

// process confirm

console.log(`The transaction id is:`, tx.id);

const confirmedTxn = await tx.confirm(tx.id);

console.log(`The transaction status is:`);

console.log(confirmedTxn.receipt);

// check the pending status after confirming

const pendingStatusAfterConfirming = await zilliqa.blockchain.getPendingTxn(

tx.id,

);

console.log(`Pending status is: `);

console.log(pendingStatusAfterConfirming.result);

// Deploy a contract

console.log(`Deploying a new contract....`);

const code = `scilla_version 0

(* HelloWorld contract *)

import ListUtils

(***************************************************)

(* Associated library *)

(***************************************************)

library HelloWorld

let not_owner_code = Int32 1

let set_hello_code = Int32 2

(***************************************************)

(* The contract definition *)

(***************************************************)

contract HelloWorld

(owner: ByStr20)

field welcome_msg : String = ""

transition setHello (msg : String)

is_owner = builtin eq owner _sender;

match is_owner with

| False =>

e = {_eventname : "setHello()"; code : not_owner_code};

event e

| True =>

welcome_msg := msg;

e = {_eventname : "setHello()"; code : set_hello_code};

event e

end

transition getHello ()

r <- welcome_msg;

e = {_eventname: "getHello()"; msg: r};

event e

end`;

const init = [

// this parameter is mandatory for all init arrays

{

vname: '_scilla_version',

type: 'Uint32',

value: '0',

{

vname: 'owner',

type: 'ByStr20',

value: `${address}`,

];

// Instance of class Contract

const contract = zilliqa.contracts.new(code, init);

// Deploy the contract.

// Also notice here we have a default function parameter named toDs as mentioned above.

// A contract can be deployed at either the shard or at the DS. Always set this value to false.

const [deployTx, hello] = await contract.deploy(

{

version: VERSION,

gasPrice: myGasPrice,

gasLimit: Long.fromNumber(10000),

33,

1000,

false,

);

// Introspect the state of the underlying transaction

console.log(`Deployment Transaction ID: ${deployTx.id}`);

console.log(`Deployment Transaction Receipt:`);

console.log(deployTx.txParams.receipt);

// Get the deployed contract address

console.log('The contract address is:');

console.log(hello.address);

//Following line added to fix issue https://github.com/Zilliqa/Zilliqa-JavaScript-Library/issues/168

const deployedContract = zilliqa.contracts.at(hello.address);

// Create a new timebased message and call setHello

// Also notice here we have a default function parameter named toDs as mentioned above.

// For calling a smart contract, any transaction can be processed in the DS but not every transaction can be processed in the shards.

// For those transactions are involved in chain call, the value of toDs should always be true.

// If a transaction of contract invocation is sent to a shard and if the shard is not allowed to process it, then the transaction will be dropped.

const newMsg = 'Hello, the time is ' + Date.now();

console.log('Calling setHello transition with msg: ' + newMsg);

const callTx = await hello.call(

'setHello',

[

{

vname: 'msg',

type: 'String',

value: newMsg,

{

// amount, gasPrice and gasLimit must be explicitly provided

version: VERSION,

amount: new BN(0),

gasPrice: myGasPrice,

gasLimit: Long.fromNumber(8000),

33,

100,

false,

);

// Retrieving the transaction receipt (See note 2)

console.log(JSON.stringify(callTx.receipt, null, 4));

//Get the contract state

console.log('Getting contract state...');

const state = await deployedContract.getState();

console.log('The state of the contract is:');

console.log(JSON.stringify(state, null, 4));

} catch (err) {

console.log(err);

}

testBlockchain();

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

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