How to Launch a Polkadot Parachain - PerfectionGeeks

How to Build a Parachain on Polkadot

Polkadot Parachain

Each blockchain technology is built on three fundamentals: decentralization and scalability, and security. The difficulty of adhering to these three fundamentals is not yet resolved. Decentralization is a reality for virtually every blockchain company; however, ensuring security and scalability is not without its challenges. Speed of transaction processing along with data processing, the support for data volumes, as well as the security of blockchain-related data and smart contracts must be enhanced. There's also a challenge in cross-blockchain interoperability that is becoming increasingly pertinent. The simplest possibility for an Ethereum exchange Bitcoin exchange can be made much simpler with the help of interoperability between blockchains.

Blockchain interoperability is crucial to ensure effective collaboration; most available solutions for cross-blockchain communication are a bit complicated limited, overloaded, and include a third party. In most cases, they're not 100% safe. However, there is a solution that can solve some of these issues.

The Polkadot network creates an algorithm for blockchains that can safely and securely communicate. This protocol allows the creation of new blockchains or parachains connected to the Polkadot main chain. It also allows the ability to transfer information and exchange transactions among chains offering the security of shared networks and vast growth potential. Polkadot has developed its parachain model to help the advancement to internet 3.0 and decentralized system. This model uses a heterogeneous multichain model, which allows several solo chains to be connected to the Polkadot Relay chain by using the parachain slot. The relay chain acts as the layer zero blockchain, while parachains are layer-1 blockchains that operate in parallel. Polkadot's Parachain model allows interoperability across different blockchains, which allows the two to coexist and work.

As any layer-1 blockchain, Polkadot parachains can have their runtime logic, their native tokens, economies, and their own set of rules for implementation. Additionally, when they connect to Polkadot's relay chain, the parachains get security from the chain. In addition, they get Polkadot's inherent benefits, including interoperability with other chains, the pooled security feature, scalability, and governance. It's not essential to say that Parachains must be designed in blockchain security, but applications can be implemented as parachains. For example, DeFi (Decentralized Finance) Applications, digital Wallets, IoT applications, Gaming applications, or Web 3.0 Infrastructure all can be used as parachains. Polkadot is encouraging developers to create parachains within the Polkadot ecosystem to overcome problems of interoperability and scalability, and applicability, which are typically found in siloed blockchains. As the leader, this information will show how to set up an initial test and deploy an underlying parachain to the Polkadot platform.

Things to think about before creating an Polkadot Parachain

There is no standard economic model to follow.

Parachains function as autonomous applications or networks that have their communities and economies, governance rules, treasuries, and connections to external chains. So, the park chain's developers, as well as its entire community, are accountable for the upkeep of the economic policies within the parachain's ecosystem.

1. There is a potential cost associated with becoming parachain

There is a cost being parachain. You could earn a return from this investment by taking part in the process of selecting a parachain and earning rewards for helping the Polkadot network to increase its value.

2. Parachain Development Kit (PDK)

Parachain Development Kit (PDK) is the tool utilized by developers to create the parachain. The PDK will comprise of the following elements:

State transition function (STF) helps an application move between states. The STF must be easily verified by a witness or evidence since it is the Relay Chain validators can verify every state that is received from the collator node, without going through the entire process.

A collator is a peer-to-peer node within the Polkadot network. A collator is an administrator of the network within the protocol. The node is accountable for keeping the state of the parachain accessible and the state changes generated by the function of state transformation. The collator node has to remain active to monitor its status and the XCMP messages it sends to itself and the other parachains.

Polkadot assists in overcoming some crucial issues in blockchain development

What does Polkadot aid in overcoming significant challenges facing blockchain developers, including interoperability, scaling, as well as security?

We've previously discussed interoperability as the critical element for the Polkadot parachains protocol. At present, the most common method of transferring value between chains is to use a centralized exchange. With Polkadot, several chains are connected so that any messages can be exchanged between them. This could be not just value but also any other kind of information or data structure that opens up new possibilities. The multi-parachain architecture of Polkadot allows for the horizontal scale, which means that a large number of transactions can be processed simultaneously.

Substrate and Cumulus are used as PDKs.

Substrate Cumulus and Substrate Cumulus are two different PDKs. The substrate is a PDK that was created in the year 2000. The substrate provides a platform that allows creating blockchain components like an interface for networking and a consensus layer, and a Wasm interpreter. The substrate is a simple process to create your runtime to start an entirely new chain. However, it does not provide direct support to Polkadot compatibility. In the end, it is necessary to install a second library that contains Polkadot compliant glue codes is necessary which Cumulus can provide. Cumulus is a Substrate extension that allows you to convert any Substrate runtime into a Polkadot compatible parachain like DeFi (Decentralized Finance) Applications. Cumulus manages a park chain's compatibility in the Polkadot network and is necessary to integrate a parachain in the Polkadot ecosystem. Cumulus manages:

  • Cross-chain message passing (XCMP)
  • A fully integrated client for the Relay Chain
  • Out-of-the-box Collator Node setup
  • Block authorship compatibility

Install your Parachain

If you are planning to use your blockchain security in the form of a par chain on Polkadot, Follow these steps:

The runtime logic is written in HTML0.

The first step is to create your chain's runtime logic using Substrate. It's like writing your runtime code for any single chain. You can use Substrate as a template—substrate templates for parachains.

Create The Wasm executable

Compile the runtime logic to the Wasm executable. The whole state transition function is contained in the Wasm code Blob. You'll need the Wasm code blob to deploy your project on Polkadot in the form of a parachain or as a part thread.

Upload the Wasm code to validate the

Polkadot validators will utilize the provided Wasm code to verify the state of transitions in your thread or chain.

Put Collator node into play.

Then, the validator will be required to verify current state changes. This is why it will make use of the collator node. Since it is the one who maintains your parachain, the collator node will perform the crucial task of creating new blocks for the chain and transfer them to Polkadot validators to be added to the Polkadot Relay Chain.

Cumulus can transform your chain logic built on substrates into a compatible Polkadot parachain

As we mentioned earlier, Substrate has its built-in network layer that supports solo chains but doesn't support chains that are linked to relay chains in any way. This is where the Cumulus extension comes into the equation. Cumulus extension allows your chain logic built on your substrate to be compatible with Polkadot and establish your Blockchain as a Parachain model or part thread.

Test your Parachain

Rococo Testnet

To test Polkadot parachains, as well as the one that is developed externally, There is a testnet named Rococo. The parachain test on Rococo examines the flow of messages and transfers between parachains and a Relay Chain. Each message is routed via the Relay Chain, and then transferred it is transferred from to the Relay Chain onto the parachain you want to test. To test this, Rococo utilizes Cumulus and HRMP (Horizontal Relay-routed Messaging Passing).

Get ROC tokens

Create and Register an Rococo Parathread

The parachains of Rococo all have the same runtime codes; however, their parachain IDs to register for Relay Chains differ. Relay chains are different.

Find an ad-hoc parachain slot

To join the Polkadot’s parachain model network, the parachain has to be in one of the parachain slots that are available. Parachain model slots are a rare supply on Polkadot since only a few are locked and released each month. The acquisition of a parachain slot is essential if a parachain is looking to ensure block inclusion at the beginning of every Relay Chain block.

Distribution of Parachain Slots through Candle Auction

The auction for parachain candles is slightly modified as it doesn't use a random number that determines the length of the opening phase. Instead, it permits bidders to know the open period while the closing time is determined retroactively.

During the open period during the open phase, bids will continue to be accepted. However, bids submitted in the latter portion of the open have a greater chance of loss due to the retroactively established closing date that may occur before the date at which the bid was submitted.


PerfectionGeeks is regarded as Best Polkadot App Development Company, as there are many benefits of taking a parachain like the sharing of security with other chains, as well as on-chain governance interoperability and scalability, it is essential to consider whether creating a blockchain to become an actual parachain is a feasible and appropriate option for a venture. The slots on the parachain are sold via a candle auction, which is modified to ensure security on the blockchain. Chain candle auctions are an open auctions where buyers submit more and more bids until the most bidder is the winner. In most cases, online auctions for candles employ a random number to determine the time at which the bidding phase, which means that buyers are not aware of the length of the auction's beginning phase.

Contact our Polkadot experts for consulting and development services, to assist you.

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