# Blockscout

The following guide walks you through the process of contract verification using the [Blockscout](https://filecoin.blockscout.com/) explorer.

## Prerequisites

* A deployed smart contract on Filecoin
* Your contract's source code (`.sol` file)
* [Remix IDE](https://remix.ethereum.org/) for flattening contracts
* Contract deployment details (address, compiler version, license, optimization settings)

## Step-by-Step Verification Process

### Step 1: Prepare Your Contract Source Code

1. **Open Remix IDE:**

![](https://3376433986-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxNWFG7bQkjLkl5BBGjbD%2Fuploads%2Fgit-blob-310fe5672b9385691c64ca594996b13a0e38fa26%2Fsmart-contracts-developing-contracts-verify-a-contract-remix.jpg?alt=media)

2. **Flatten your contract:**
   * In the **File Explorer** sidebar, under **contracts**, right-click on your contract
   * Select **Flatten** from the menu
   * This creates a `<contract-name>_flattened.sol` file with all dependencies included
3. **Verify contract details:**
   * Ensure the license and Solidity version match your original contract
   * Click **Save** to save the flattened contract
4. **Download the flattened contract:**
   * Right-click on `<contract-name>_flattened.sol`
   * Select **Download** to save the file locally
5. **Gather required information:**
   * Contract deployment address
   * Contract license type (optional)
   * Solidity compiler version used for deployment
   * Optimization settings (enabled/disabled and runs count)

### Step 2: Submit for Verification

6. **Access Blockscout verification page:**
   * Navigate to the [Blockscout Contract Verification](https://filecoin.blockscout.com/contract-verification) page
7. **Fill in contract information:**
   * Enter your contract's deployment address
   * Select the appropriate license type (optional)
   * Choose verification method: `Solidity (Single file)`
   * Enter the compiler version used for deployment
   * Paste the source code from your `<contract-name>_flattened.sol` file
   * Configure the `Optimization enabled` checkbox to match your deployment settings

![](https://3376433986-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxNWFG7bQkjLkl5BBGjbD%2Fuploads%2Fgit-blob-757efff0cba42865e72df7accffacc5036a4d240%2Fsmart-contracts-developing-contracts-verify-a-contract-blockscout.jpg?alt=media)

8. **Submit for verification:**
   * Click **Verify & Publish** to submit your contract

### Step 3: Verification Complete

Upon successful verification, Blockscout will display a success message and redirect you to your verified contract dashboard where you can view the source code and interact with your contract.

![](https://3376433986-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxNWFG7bQkjLkl5BBGjbD%2Fuploads%2Fgit-blob-f152f0747c0fde62f7eee6da9b9be13adc9498db%2Fsmart-contracts-developing-contracts-verify-a-contract-success-blockscout.jpg?alt=media)

[Was this page helpful?](https://airtable.com/apppq4inOe4gmSSlk/pagoZHC2i1iqgphgl/form?prefill_Page+URL=https://docs.filecoin.io/smart-contracts/developing-contracts/verify-a-contract/web-interface/blockscout)