console.clear();

import { Client, AccountId, PrivateKey, Hbar, PrngTransaction, ContractFunctionParameters } from "@hashgraph/sdk";

import dotenv from "dotenv";

dotenv.config();

import * as queries from "./utils/queries.js";

import * as contracts from "./utils/contractOperations.js";

import contract from "./contracts/PrngSystemContract.json" assert { type: "json" };

const operatorId = AccountId.fromString(process.env.OPERATOR_ID);

const operatorKey = PrivateKey.fromString(process.env.OPERATOR_PVKEY);

const client = Client.forTestnet().setOperator(operatorId, operatorKey);

client.setDefaultMaxTransactionFee(new Hbar(100));

client.setMaxQueryPayment(new Hbar(50));

async function main() {

// STEP 1 ===================================

console.log(`\nSTEP 1 ===================================\n`);

console.log(`- Generating random numbers with the SDK...\n`);

const lo = 0;

const hi = 50;

let randomNum = [];

for (var i = 0; i < 5; i++) {

const randomNumTx = await new PrngTransaction().setRange(hi).execute(client);

const randomNumRec = await randomNumTx.getRecord(client);

randomNum[i] = randomNumRec.prngNumber;

console.log(`- Run #${i + 1}: Random number = ${randomNum[i]}`);

}

// STEP 2 ===================================

console.log(`\nSTEP 2 ===================================\n`);

console.log(`- Generating random number with Solidity...\n`);

// // Deploy the Solidity contract

let gasLim = 4000000;

const bytecode = contract.object;

const [contractId, contractAddress] = await contracts.deployContractFcn(bytecode, gasLim, client);

console.log(`- Contract ID: ${contractId}`);

console.log(`- Contract ID in Solidity address format: ${contractAddress}`);

// Execute the contract

const randNumParams = new ContractFunctionParameters().addUint32(lo).addUint32(hi);

const randNumRec = await contracts.executeContractFcn(contractId, "getPseudorandomNumber", randNumParams, gasLim, client);

console.log(`- Contract execution: ${randNumRec.receipt.status} \n`);

// Query the transaction record to get the random number from bytes

const recQuery = await queries.txRecQueryFcn(randNumRec.transactionId, client);

let lowOrderBytes = new Uint8Array(recQuery.children[0].prngBytes).slice(28, 32);

let dataview = new DataView(lowOrderBytes.buffer);

let range = hi - lo;

let int32be = dataview.getUint32(0);

let randNum = int32be % range;

console.log(`- The random number (using transaction record) = ${randNum}`);

// Call the contract to read random number using the getNumber function

const randNumResult = await contracts.callContractFcn(contractId, "getNumber", gasLim, client);

console.log(`- The random number (using contract function) = ${randNumResult.getUint32(0)}`);

randNum === randNumResult.getUint32(0) ? console.log(`- The random number checks out ✅`) : console.log(`- Random number doesn't match ❌`);

const [randNumInfo, randNumExpUrl] = await queries.mirrorTxQueryFcn(randNumRec.transactionId);

console.log(`\n- See details in mirror node explorer: \n${randNumExpUrl}`);

console.log(`

====================================================

🎉🎉 THE END - NOW JOIN: https://hedera.com/discord

====================================================\n`);

}

main();