# 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><br>

## Read contract

Public fields of the contract:

```
uint public unlockTime;
address payable public owner;
```

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

<figure><img src="/files/ODhKRg0l49xg8mxXQV7l" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
Public fields and view functions are displayed on the explorer.
{% endhint %}

### Write contract

Contract have a function:

```
function withdraw() public {}
```

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

<figure><img src="/files/nKVZyDzRZdzoMlVREYNv" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
To interact with contract, you have to connect your wallet to the explorer.
{% endhint %}

## 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:&#x20;

{% code overflow="wrap" %}

```
Withdrawal has completed. Transaction hash: 0x0481a1abccb0e3dc336ec970628c033d11af6696da5536838ac76cad5f0494d7
```

{% endcode %}

## With a frontend and web3.js

Please head to next section [Integrate Your Smart Contract With a Frontend](/for-developers/smart-contract-development/interact-with-your-smart-contract.md).


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.u2u.xyz/for-developers/smart-contract-development/interact-with-your-smart-contract.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.