# Verifying a Smart Contract

Our block explorer [https://explorerl2.sx.technology/](https://explorer.sx.technology/) includes the ability for developers to verify any previously-deployed contracts.

Developers can reference this page which describes the verification process of how developers can use our explorer's contract verification form to verify their contracts.

## I. Preparing to verify via Standard Input JSON

Follow the simple steps below to verify your Smart Contracts:

1. Ensure your contracts have been deployed and note down their contract addresses
2. On BlockScout, under the **Contract** tab of your deployed Smart Contract, click on the button to **Verify & publish.**
3. You can then proceed to verify these contracts yourself via  'Standard Input JSON' (see [Part II](#ii.-verifying-via-standard-input-json) below).

## II. Verifying via Standard Input JSON

Please fill out all fields according to the official BlockScout docs [here](https://docs.blockscout.com/for-users/verifying-a-smart-contract#via-standard-json-input) - note that the uploaded JSON file should only consist of the following 3 keys taken from the `input` key:

* `language`
* `sources`
  * Within this section, we suggest you remove all entries that are unrelated to the contract you are verifying as any entries within this section will be included within the **Code** tab 
    * It is highly recommended to first *flatten* your Smart Contract prior to deploying - this will make it easier to distinguish required imports from other .sol files within your repository.
* `settings`

For your convenience, we've included an example .json file which can be referenced below:

```
{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT ..."
    },

    ...

    "contracts/tokens/TestToken.sol": {
      "content": "// SPDX-License-Identifier: MIT ..."
    },
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "abi",
          "evm.bytecode",
          "evm.deployedBytecode",
          "evm.methodIdentifiers",
          "metadata",
          "storageLayout",
          "devdoc",
          "userdoc",
          "evm.gasEstimates"
        ],
        "": [
          "ast"
        ]
      }
    },
    "metadata": {
      "useLiteralContent": true
    }
  }
}
```

After filling the form click the **Verify & publish** button and wait for the response.

In a few moments you'll see a green check mark appear within the **Code** tab indicating that your contract has been verified successfully. 

Additionally, you'll see a **Read Contract** and **Write Contract** tab which will allow users to interact with all read and write functions of your Smart Contract.