# Multichain Verification(WIP)

For repeated or multichain contract verification, it's best to use the Verify Contract endpoint to automate source code submission :rabbit2:.

## 1. Using the Verify Contract Endpoint <a href="#id-1.-using-the-verify-contract-endpoint" id="id-1.-using-the-verify-contract-endpoint"></a>

In Postman, set your request method to **HTTP POST** and your URL to `https://api.xdcscan.io/` .

Under the Body tab and using `form-data`, specify the "module" to `contract` and "action" to `verifysourcecode.`

## 2. Specify Your chainId <a href="#id-2.-specify-your-chainid" id="id-2.-specify-your-chainid"></a>

Select the chain you've deployed your contract, which is supported by an Etherscan-like explorer.

Specify it under the "chainId" parameter, such as `51` for Apothem and `8453` for Base.

## 3. Add Contract Source Code <a href="#id-3.-add-contract-source-code" id="id-3.-add-contract-source-code"></a>

We support 2 formats, `solidity-single-file` or `solidity-standard-json-input.`

Using JSON is the gold standard ✨ for verification, as you can [**include compiler settings and multiple files**](https://gist.github.com/0xV4L3NT1N3/974d6bfb58070e0fe4e38d626cdf1c44) ( if you use imports such as from [**OpenZeppelin**](https://www.openzeppelin.com/contracts) ).

Paste your source code under "sourceCode" and the code format under the "codeformat" parameter.

Optionally if your contract uses \[**constructor arguments**], you may specify them too under the "constructorArguements" parameter in [**ABI encoded**](https://abi.hashex.org/) format.

## 4. Add Contract Metadata <a href="#id-4.-add-contract-metadata" id="id-4.-add-contract-metadata"></a>

Include the contract address as "contractaddress", beginning with "0x".

Specify your contract file path and contract name **separated by a colon** as "contractname", such as "contracts/Verified.sol:Verified".

## 5. Submitting Verification <a href="#id-5.-submitting-verification" id="id-5.-submitting-verification"></a>

If everything went well, you'll see the happy green checkmark on your [**contract code**](https://xdc.blocksscan.io/address/0x1f45725b14d6a87d87e94c9402221f7a2ef18e67?tab=contract#code) ✅