How To Build A dApp On Polygon Blockchain?

How To Build A dApp On Polygon Blockchain?

Blockchain News
March 6, 2023 by Diana Ambolis
Ethereum is the most popular open-source ecosystem, which can be used to build decentralised applications. It fixed the problems with the Bitcoin blockchain by letting smart contracts and other solutions be made. But because scaling in Ethereum isn’t as good as it could be, it’s more important than ever to build dApps on the Polygon
How To Build A DApp On Polygon Blockchain? How To Build A DApp On Polygon Blockchain?

Ethereum is the most popular open-source ecosystem, which can be used to build decentralised applications. It fixed the problems with the Bitcoin blockchain by letting smart contracts and other solutions be made. But because scaling in Ethereum isn’t as good as it could be, it’s more important than ever to build dApps on the Polygon blockchain.

Proof of Stake is the main idea behind Polygon blockchain, which is a popular layer 2 scaling solution. The blockchain network builds on Ethereum’s technological foundation and also has big value advantages. Polygon blockchain could help the Ethereum ecosystem and other blockchains that work with the EVM have a better throughput, lower costs, and more development options.

The need for guides to build dApps on the Polygon blockchain has become a big part of blockchain developers’ job prospects. Polygon has gotten a lot of attention from developers of decentralised applications (dApps) because it has a lot of features for dApp development. Developer tools and software development kits (SDKs) can help dApp developers make decentralised apps for business use cases. The next post gives a detailed guide for making dApps on the Polygon blockchain network and explains why Polygon is important.


Why is Polygon Blockchain so well-known?

The first step in answering “How do I make a dApp on Polygon?” is to know what Polygon is and why it’s important. Polygon blockchain was made as a way to interact with dApps and blockchain networks that are compatible with Ethereum. The Polygon blockchain used to be called the Matic Network. It is also known as the internet of Ethereum’s blockchains. Why? Polygon wants to create a set of scalable solutions for building an Ethereum ecosystem that works with multiple chains.

The unique features of Polygon are an important part of Polygon dApp development and give dApp developers a lot of value. The features of layer 2 scaling solutions are one of the main reasons why Polygon is a popular choice for building dApps. It was made with the goal of making it easier for existing and new Ethereum infrastructures to work together.

It also has a sophisticated framework with sovereign blockchains and sidechains. On the base chain, the layer 2 solution has been built, which can help limit the limitations of the base chain. On top of that, the Polygon blockchain is a key part of fixing the problems that layer 1 blockchain networks have.

Polygon was made as a plasma-based aggregator, which is another important feature of the Polygon blockchain for making dApps on the Polygon network. It can be used as a good framework for making it easier to build flexible, decentralised applications off-chain. Plasma framework is one of the most important reasons why Polygon has become so popular. It uses Plasma technology in the form of Plasma Chains, which can make layer 1 blockchain networks less busy with transactions.

How Does Polygon Fix Ethereum’s Problems?

If you want to make a decentralised app, you might want to use Ethereum. Well, it’s clear that it’s the best blockchain network for building dApps. In fact, Ethereum is where the dApp ecosystem you see today got its start. Why would you make Polygon dApps when you could make Ethereum apps instead? The answer shows that Ethereum’s popularity is one of its worst problems.

The fact that Ethereum can only handle about 30 transactions per second is one of its biggest problems. On top of that, it costs more to make a transaction on Ethereum. Most importantly, the demand for dApp development on Ethereum slows down the network because it causes network congestion. Also, the Ethereum blockchain doesn’t have the option of interoperability, which means that Ethereum-compatible blockchain networks can’t talk to each other.

Due to Ethereum’s problems, Polygon dApp development has become possible. Polygon dApp development solves the problems. Polygon helps build blockchain networks that work with EVM and make sure they can talk to Ethereum. Polygon makes it easy to set up secure blockchain networks with just one click. Polygon’s modules are always getting bigger, which makes it easier to build custom networks.

Ethereum and other blockchain networks can share messages through Polygon’s interoperability protocol. After that, Polygon can make security better by using modular security as a service method. The adaptor modules on Polygon make sure that the existing blockchain networks can work together better.

Also, read – How Are Smart Contracts Implemented In DApps Games? Is It Relevant?


How to Make a dApp on Polygon

The benefits of Polygon show why you should look up “How to build a dApp on Polygon” and find out more. Let’s say you want to make a YouTube-style social media dApp. Before learning about dApp development on Polygon, you should think about what you need to know. To make a decentralised app on Polygon, you need to know how to programme and be familiar with blockchain technology.

You must also know a lot about the basics of blockchain and how to make smart contracts. Once you know how to build dApps technically, you can start with the steps below to build a decentralised social media app on Polygon.


Step 1: Get all the important things you need.

What do you mean by “important requirements” when making a decentralised app? The process of making the best dApps on Polygon starts with a clear list of what needs to be done. The first step in making a decentralised application (dApp) is figuring out what it needs to work. Here’s a list of the important dependencies you’ll need to make a decentralised social media app on the Polygon blockchain.

  • Node.js and Node Package Manager

Node.js is a key part of building a dApp on Polygon because it is the environment where JavaScript runs. On the other hand, npm, which stands for Node Package Manager, installs JavaScript packages.

  • Truffle

Truffle is the next important tool for making dApps. It is one of the most popular environments for building blockchains, and it has a lot of features. The most important thing is that Truffle can help you learn how to make Polygon dApps by using template code. You can start making a social media dApp with the help of the boilerplate code or template code that is available on Truffle. You can install Truffle by typing the following command in the terminal:

  • npm install –g truffle
  • Ganache

Once the dApp has been built, you will need a place to test it. Ganache has a local blockchain and default accounts for a private blockchain environment.

  • Metamask

Setting up Metamask is another important step in developing a Polygon dApp. It lets users access their Ethereum wallet through a browser extension and interact with decentralised applications. After you add a new RPC endpoint, you can use Metamask to talk to the Polygon blockchain. After that, you can open the Metamask extension and add the Polygon network. You have to put MATIC tokens in your wallet so that you can test and deploy the system.

  • Tech Stack

The tech stack is the most important part of the requirements for making the best dApps on Polygon. How will you build the dApp? What programming languages, platforms, and tools will you use? Solidity, HTML5, JavaScript, and CSS3 are the most important programming languages for making dApps. Platforms like Ethereum, Fleek, and the Polygon network are used by developers of decentralised apps. Also, you must know how to use IPFS well enough to design the way your dApp stores data.

Most importantly, developers of Polygon dApps must know how to use the React.js and Web3.js libraries. React.js is a key JavaScript library that is used to build the front end of dApps on the Polygon blockchain. On the other hand, Web3.js has a set of JavaScript libraries that make it possible for smart contracts and the dApp frontend to talk to each other.


Step 2: Get the project ready

Setting up the project would be the second step in the process for “How to make a dApp on Polygon.” You can avoid version errors and other problems that come with installing dependencies. How? The simple answer is to clone a repository on GitHub. The copy of the template dApp would have all the necessary dependencies and project files.

Forking the repository is the first step in setting up the dApp development project on Polygon. It would make a copy of the project in your account. Now, you need to make a copy of GitHub and copy the project files to your computer. Remember that when you clone the repository, a copy of the repository will be downloaded to the machine.

Then, you need to go to the folder where your code editors or Integrated Development Environment, like Visual Studio Code or Remix, is stored. You should also install the dependencies through the node package manager to meet the requirements for making dApps on the Polygon network.


Step 3: Writing code for smart contracts with Solidity

The social media example dApp aims to create smart contracts for uploading videos with the IPFS video hash. It would also have code for storing videos with the IPFS video hash and the title. The social media dApp smart contract would also have logic for listing videos on blockchain based on their video IDs. Here are the steps for making the Solidity smart contract for this Polygon dApp development example.

  • Set the name of the contract and the version of the Solidity compiler you want to use.
  • With an unsigned integer data type, start the first video count specification with the number 0.
  • A character string data type represents the name of the contract. This makes it possible to refer to the contract by name through the Application Binary Interface.
  • Set up a connection between a particular unsigned integer number and a video. Every part of a video would have a different type of data, which would be shown by the variable for videos.
  • The next step in making a smart contract for these kinds of dApps on Polygon is to create video data types along with the video upload confirmation event.
  • Create a function for uploading videos that takes two arguments for the title and the hash of the video.
  • In the last step of making a smart contract, you have to use different variables to add a video to the contract. The variables are the number of videos, their titles, and their hashes.


Step Three: Moving to Truffle

Starting with Truffle is the first step in building your dApp on Polygon. It offers the boilerplate or template code with the following important project files.

  • Test
  • Truffle-config.js
  • Migrations/1 initial migration.js
  • Contracts/Migrations.


SolCopy Truffle Migrations are a big part of how-to guides for building a decentralised application (dApp) on Polygon. This is because they help deploy contracts to networks compatible with Ethereum and EVM. The JavaScript files are in charge of staging deployment tasks and making assumptions about how deployment goals might change.


Step 4: Putting together the front end

After setting up the development environment for building a dApp on the Polygon blockchain, you need to focus on the dApp frontend. React.js is the best tool for building the front end of your social media dApp. It loads as a single HTML page showing off all the parts you’ve set up for your dApp. Here are some important steps to take when building the front end of your Polygon dApp:


  • Along with calling IPFS client to store and get files, importing all components and libraries.
  • Use JavaScript’s Async and Await functions to avoid making mistakes when writing code for the front end.
  • How to get the file ready to upload to IPFS and how to upload video files.
  • After that, you need to add other functions, like changing the video files, and the necessary parts, like the navigation bar, the main page, and the footer.
  • With the Navbar.js library, you can add the brand’s logo, the user’s account address, the user’s profile, and the brand’s name.


Step 5: Put the dApp to work on Polygon

Putting smart contracts on the Polygon blockchain is the last important step in making a dApp on Polygon. You can use the “truffle-config” file to deploy your dApp’s smart contract. Along with setting up the networks, it is also important to configure the path of deployment to the Solidity file and contract ABI. You can use the following command to set up the smart contract,

  • Truffle migration–network matic

Once the smart contract is in place, you can use the ‘npm start’ command to run the React app on a local host. It would open a Metamask extension that would ask for the wallet to be connected to the dApp. You can link the wallet to the dApp so you can keep sharing videos and uploading them to your Polygon dApp.

  • Certification programmes for web3
  • With Fleek, you can host IPFS.

The use of decentralised hosting is the most important part of building a Polygon dApp. You might think IPFS is the answer to the problems caused by centralised servers. But IPFS makes it hard to update and change projects that have the same IPFS hash. Therefore, Fleek IPFS hosting can help deploy the dApp project, obtain a link and SSL certificate, and assign the concerned domain. Also, the Fleek IPFS hosting can let developers connect to the GitHub repository to update the project.

Bottom Line

How to make a decentralised application (dApp) on the Polygon blockchain is explained in detail in the guide. Polygon can change the way dApps are made by fixing Ethereum’s scaling and interoperability problems. Polygon is a layer 2 scaling solution that gives you a wide range of tools for deploying your dApps faster and for less money.

The best dApps on Polygon could help people who are just starting out learn how to make dApps. Before you could develop dApps on the Polygon blockchain, you would need to know the basics of Polygon.