> For the complete documentation index, see [llms.txt](https://docs.bunzz.dev/product-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bunzz.dev/product-docs/module/contract-verification.md).

# Contract verification

## What is the contract verification

Contract verification is the process of compiling the source code of a given smart contract in a high-level language (such as Solidity) and verifying that it is the same as the byte code to be executed at the contract address.

Contract verification improves reliability because users can see the verified code associated with the contract address on the verified service.

{% hint style="info" %}
For now, contract verification needs to be done manually. But the auto-verification function is coming soon.
{% endhint %}

## Prerequisites

* DApp is created
* Module is deployed

## How to verify contract

To begin, open the Contract Validation page of the Blockchain Explorer for the chain in which you deployed the module. For example,

Testnet

* [Goerli testnet](https://goerli.etherscan.io/verifyContract)
* [Sepolia testnet](https://sepolia.etherscan.io/verifyContract)
* [Mumbai testnet](https://mumbai.polygonscan.com/verifyContract)

Mainnet

* [Ethereum mainnet](https://etherscan.io/verifyContract)
* [Polygon mainnet](https://polygonscan.com/verifyContract)

If your chain is not listed above, search a block explorer by google. 

In this article, we will proceed using Mumbai testnet.

When you access the contract verification page, you will see the following UI.

![](/files/BaVYkvcpANWSCdw75V42)

To get the information you need to enter on this screen, go to Bunzz and navigate to the DApp dashboard.

{% hint style="warning" %}
If you do not see the "Verify" button, click the "Back to deployment process" contract in the upper right corner to complete deployment.
{% endhint %}

![](/files/5mYJIOzT6CcPyjbkSkyZ)

Click on the "Verify" button to get information for verify.

![](/files/bFhrJFw6cbdJK7YxbDaV)

You can then get these information. Enter this information in the verification screen of the Blockchain Explorer.

<img src="/files/7PXECyeG1xEE4AmD0QKp" alt="" data-size="original">

When you are finished, click the Continue button. Then the following screen will appear and you will need to enter the respective information.

![](/files/bdnbJb5MoUQ6t1ejiy7K)

When you are finished, click the "Verify and Publish" button to complete the verification.

![](/files/qYhruJCZdisAjjP9uSHu)