Interact With Your Smart Contract

With blockchain explorer

With verified contracts on blockchain explorer, we can easily interact with them via blockchain explorer UI.

https://testnet.u2uscan.xyz/address/0x8D51395C76C34d0e11178c1F7EE3219B4b958e30/read-contract#address-tabs

Read contract

Public fields of the contract:

uint public unlockTime;
address payable public owner;

They are displayed on the explorer, at Read contract tab:

Public fields and view functions are displayed on the explorer.

Write contract

Contract have a function:

function withdraw() public {}

Since it is publicly set, user can interact with this function via explorer's UI:

To interact with contract, you have to connect your wallet to the explorer.

With Hardhat

The same as above method, we will call withdraw() on Lock contract.

Back to your sample project, at scripts folder, add following withdraw.ts file:

import { ethers } from "hardhat";
import { Lock } from "../typechain-types";

async function main() {
    const [owner] = await ethers.getSigners();

    const lockAddr = "0x8D51395C76C34d0e11178c1F7EE3219B4b958e30"
    const Lock = await ethers.getContractFactory("Lock")
    const lock = await Lock.attach(lockAddr) as Lock

    const tx = await lock.withdraw()
    console.log("Withdrawal has completed. Transaction hash: " + tx.hash)
}

main().catch((error) => {
    console.error(error);
    process.exitCode = 1;
});

Then run it by:

npx hardhat run scripts/withdraw.ts --network nebulas

And the result:

Withdrawal has completed. Transaction hash: 0x0481a1abccb0e3dc336ec970628c033d11af6696da5536838ac76cad5f0494d7

With a frontend and web3.js

Please head to next section Integrate Your Smart Contract With a Frontend.