> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rwalayer.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Contract Verification

Verifying your smart contracts on RWALayer is a crucial step to ensure transparency and trust. RWALayer supports
verification through popular tools like `Hardhat` and `Foundry`. Below is a comprehensive guide to help you navigate
the verification process using these tools.

<Callout type="warning" title="API Key Placeholder">
  `forge` requires a value for the `--etherscan-api-key` option even if a valid API key is not necessary. You can use
  a placeholder in such cases.
</Callout>

## Configuring Verification Endpoints

It’s crucial to direct your verification requests to the appropriate API endpoint. For Hardhat, this is configured in
the `apiUrl` within your settings. For Foundry, you need to specify this via the `--verifier-url` in your forge command:

| Explorer                                                       | Testnet Endpoint            |
| -------------------------------------------------------------- | --------------------------- |
| [https://explorer.rwalayer.com](https://explorer.rwalayer.com) | `https://rpc.rwalayer.com/` |

## Contract verification using Foundry

To verify your contracts during deployment or for an existing deployment using Foundry, follow these steps:

```bash theme={null}
# Verification during deployment
forge script <deploy-script> \
    --verify --verifier-url <verification-endpoint> \
    --etherscan-api-key <api-key> --rpc-url <rpc-url> \
    --verify --broadcast -vvvv
```

```bash theme={null}
# Verification of an existing contract
forge verify-contract <address> <contract> \
    --verifier-url <verification-endpoint> \
    --etherscan-api-key <api-key> --watch
```

## Contract verification using Hardhat

For Hardhat users, successful contract verification involves proper configuration of your `hardhat.config.ts` or
`hardhat.config.js` file. This includes setting up the networks and etherscan properties.

<Tabs>
  <Tab title="Config">
    <CodeGroup>
      ```typescript hardhat.config.ts theme={null}

      import { HardhatUserConfig } from "hardhat/config";
      import "@nomicfoundation/hardhat-toolbox";
      import "@nomicfoundation/hardhat-ignition-ethers";
      import { vars } from "hardhat/config";

      const PRIVATE_KEY = vars.get("PRIVATE_KEY");

      const config: HardhatUserConfig = {
        solidity: "0.8.24",
        networks: {
          "rwalayer-testnet": {
          url: "https://rpc.rwalayer.com/",
          accounts: [PRIVATE_KEY]
          }
        },
        etherscan: {
          apiKey: API_KEY,
          customChains: [
            {
              network: "rwalayer-testnet",
              chainId: 3549,
              urls: {
                apiURL: <verification-endpoint>,
                browserURL: <explorer-url>
              }
            }
          ],
          enabled: true
        }
      };

      export default config;
      ```

      ```javascript hardhat.config.js theme={null}

      require("@nomicfoundation/hardhat-toolbox");
      require("@nomicfoundation/hardhat-toolbox");
      require("@nomicfoundation/hardhat-ignition-ethers");
      const { vars } =  require("hardhat/config");

      const PRIVATE_KEY = vars.get("PRIVATE_KEY");

      module.exports = {
        solidity: "0.8.24",
        networks: {
          "rwalayer-testnet": {
          url: "https://rpc.rwalayer.com/",
          accounts: [PRIVATE_KEY]
          }
        },
        etherscan: {
          apiKey: API_KEY,
          customChains: [
            {
              network: "rwalayer-testnet",
              chainId: 3549,
              urls: {
                apiURL: <verification-endpoint>,
                browserURL: <explorer-url>
              }
            }
          ],
          enabled: true
        }
      };
      ```
    </CodeGroup>
  </Tab>

  <Tab title="During Deployment">
    ```bash theme={null}
    npx hardhat ignition deploy ignition/modules/Example.ts \
      --network <network> --verify
    ```
  </Tab>

  <Tab title="After Deployment">
    ```bash theme={null}
    npx hardhat verify <address> --network <network>
    ```
  </Tab>
</Tabs>