How to Verify Your Smart Contract on PolygonScan?

Introduction

Hello reader! Welcome to the interesting world of Polygon Smart Contracts. Polygon gives an exciting arena to explore decentralized apps (DApps) using the power of smart contracts. Using the latest tools and online IDEs like Remix, which are easily available to us, the creation and deployment of the smart contract are made much easier. You just need to write and deploy the smart contract on an active mainnet or testnet chain using a wallet and account address. Simply by deploying the contract to the network and having its address and ABI, you can use it for coding.

But, even though you can deploy the contract and use the contract, can you guarantee that the smart contract deployed is both secure and transparent to everyone on the blockchain? After all, blockchain and Web3 are all about transparency. This is where PolygonScan enters the picture. It works as a personal security guard, which takes a good glance at the smart contract code and verifies it for us.

In this article, we will be learning how to use PolygonScan's user-friendly interface to verify and publish the source code of the contracts we are deploying. Let's get to it without any further delay.

Why Verify and Publish Contract?

Think that you have created an amazing smart contract that you are going to use for business purposes or to change the world with your innovation. But how will you assure your users, business partners, and other people that your contract is genuine, secure, and bug-free and convince them to lock their tokens or money in that contract? This is where verification comes into play.

Consider smart contract verification just like getting a quality assurance stamp. It increases the trust of people towards your contract by demonstrating that your contract operates the same as it is intended and has not been tampered with. By adding a seal of authenticity to the contract, we are basically conveying the message that "Hey, this contract is the real deal, and you can trust it".

Publishing verified contracts on PolygonScan opens the door to transparency, letting others see and trust your creation.

Let's now get down to how we can verify a smart contract on polygonscan.

How to Verify Contract?

Verifying a contract on polygonscan is a simple process, with the help of the user-friendly environment that the polygonscan provides. It is like a walk in the park. But to successfully verify a smart contract, we need to have some prerequisites.

Prerequisites

1. A written smart contract (source code).
2. Smart contract deployed on polygonscan
3. Deployed contract's address

If you have written and deployed a contract and have the source code of that contract along with the contract address, then that's all we need to verify the contract. but if you are a beginner and don't have a contract yet. You can read my article Smart Contract Deployment Made Easy with Hardhat. Here, you will get a complete guide for creating to deploying a smart contract on a polygon network using a popular tool called Hardhat.

After you have all the prerequisites mentioned above, view your smart contract on PolygonScan.

In this tutorial, we will be using the Testnet server. Follow the below steps to verify the deployed contract on the polygon scan.

Step 1. TESTNET Polygon Blockchain Explorer

Visit TESTNET Polygon Blockchain Explorer. Now search for the contract using the deployed contract address. You will be getting the contract creation log on Block Explorer.

Step 2. Verify and Publish

Click the contract button >Verify and Publish.

Step 3. Fill the form 

Now you will be getting a webpage opened on your screen to verify and publish the smart contract.

Fill out the form, which includes some basic questions about the contract address, compiler type, compiler version, and open-source license type used in the contract.

Explanation

Fill out the solidity file type; in this tutorial, we are using a Single file type, so select Solidity(Single File). Next, select the compiler version that was used during the compilation process by the Compiler. (Please ensure the compiler version used inside the hardhat config and solidity files are the same. If by any chance they are not the same, then select the compiler version used inside the hardhat config.js file as that is used during the compilation process). Provide the Open Source License Type used for the solidity code. In our case, we are using an MIT License. After filling in all the fields, press Continue.

Step 4. Provide the source code

Now, you will be asked to provide the source code of the contract that you have written. Provide polygonscan with the contract code, and if there is any code optimization used, then select the code optimization to Yes.

The code optimization is not used in our case, so that it will be No.

After providing the source code, fill out the captcha below and then press the button Verify and Publish​​​​.

Step 5. Contract Verified and published

Congratulations! Your contract has been verified and published on Polygonscan.

You will see a Successful message on the screen.

Return to the Contract page, where you can see the contract log you searched during step 1. You will see a green tick on the contract section, and your contract's code will be visible there, which anyone can read along with your contract's ABI. This ensures transparency and trust.

Conclusion

In conclusion, verifying and publishing your smart contract on PolygonScan is a vital step to ensure its authenticity, security, and transparency. By undergoing this process, you provide users, partners, and stakeholders with the confidence they need to interact with your contract. PolygonScan's user-friendly interface simplifies the verification process, making it accessible to developers of all levels. Remember, in the realm of blockchain and Web3, transparency and trust are paramount, and verifying your smart contract on PolygonScan is a significant step in that direction.

FAQs

Q. Why is it important to verify and publish my smart contract on PolygonScan?

A. Verifying and publishing your smart contract on PolygonScan is crucial for establishing credibility and trust in the blockchain ecosystem. It assures users, partners, and stakeholders that your contract is genuine, secure, and bug-free. By undergoing verification, you provide a quality assurance stamp, signaling that your contract functions as intended and hasn't been tampered with.

Q. Is contract verification on PolygonScan a complex process?

A. No, contract verification on PolygonScan is designed to be user-friendly and straightforward. The platform provides a step-by-step process that guides you through filling out necessary information about your contract, such as its address, compiler version, and source code. After completing the form and providing the required details, you simply submit it for verification. The process is streamlined to ensure developers of varying experience levels can easily verify and publish their smart contracts without unnecessary complexity.