Cross-chain Web3 Applications on Polkadot

A Complete Guide on Cross-chain Web3 applications on Polkadot

June 07, 2022 05:30 PM

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Ever since the introduction of the first blockchain-powered digital currency-Bitcoin by Satoshi Nakamoto in 2008, the original distributed ledger technology has experienced considerable modifications, providing the world with innovation-rich third-generation blockchains such as XDC Network, Polkadot, and Near Protocol. With blockchains arriving at the mainstream, the application of decentralized technology has also been advancing rapidly. However, the blockchain world is now seeing a buzz around cross-chain or multichain technology as companies and end-users seek an interoperable ecosystem that can leverage the unique qualities and capabilities of several blockchains.

The growing demand for interoperable blockchains compares to the overwhelming popularity of cross-chain dApps. Withross-chain decentralized applications, companies can scale and expand the usability of their apps across a combination of blockchain ecosystems.

To create cross-chain applications, the developers must Web3 blockchain Networks like Polkadot, which deliver a backend to run the cross-chain or multichain dApps.

What is Polkadot?

Polkadot is a network for blockchain interoperability. As a network protocol, it delivers business blockchain applications a platform to share messages, including value, in a trust-free fashion, transfer their unique features, and initiate cross-blockchain transfers of any data or asset.

The custom blockchains created on top of Polkadot, also known as para chain, can take out interchain transactions using the shared security supplied by Polkadot in a trust-minimized way. This protocol provides birth to an interconnected internet of blockchains.

What is the Polkadot network in crypto?

In simple terms, Polkadot (DOT) is a blockchain with a center network — the relay chain, where other blockchains link and convey with each other. By hosting blockchains, the relay chain also manages its security and transactions, allowing cross-chain interoperability (communication between different blockchains) to function seamlessly.

As a point of fact, but sending DOT tokens across blockchains, Polkadot also permits them to communicate and exchange existing data.

Thus, interoperability is the big issue that Polkadot attempts to resolve. Instead of different entities that work independently, blockchains should become part of the same ecosystem where data and money can be exchanged securely in a scalable way. While private blockchains have somewhat other technical protocols than public blockchains, Polkadot even determines the communication between these two different types of networks.

Polkadot’s flexible and adaptive network architecture enables creating of new technology on top, enabling innovators to take benefit of the scalability, interoperability and security offered. Therefore, Polkadot’s network also denotes a significant breakthrough for developers and entrepreneurs who like to make a new blockchain from scratch.

When trying to make a new blockchain, creators make a unique state machine and a consensus algorithm, which is not easy to execute and takes a lot of action and time. Polkadot’s fundamental architecture seeks at resolving this as it eliminates the requirement to create blockchains from scratch.

A blockchain made within Polkadot uses the Substrate modular framework, which lets users plug in the parts they need while also letting them modify them as needed. Moreover, it lets developers customize the chain architecture, choose certain components that suit their requirements, and bridge blockchains with other networks, including Ethereum and Bitcoin.

The “Philosophy” of Polkadot

There are quite a few critical principles on which Polkadot is developed. Some of them are listed below:

  • A rock-solid foundation for consensus algorithms
  • Strong guarantees over the isolation, communication, and security of chains. Polkadot Parachains will have the ability to decide how they like to acquire all these elements.
  • Get a lot of conservative and high-value chains deployed as Parachains. and also Fully encrypted chains that provide distinct services.
  • Enable different chains like Ethereum to join the Polkadot network.
  • Manage the governance system on Polkadot, they desire to establish a system that will have a bicameral part just like the Yellow Paper council. All the stackable token holders would have the power to make governance decisions.

4 Basic Tennent’s of Polkadot

Polkadot prior tenants will assist in creating design decisions. Such tenants are following:

  • Minimal- Polkadot should be as small and functional as required.
  • Simple- There should be no complexness in the base protocol to sidestep issues for Parachains.
  • Generalized- There r strains on Parachains. Polkadot should be the bed for the peace layer that can be independently optimized.
  • Robust- Polkadot should deliver a stable layer that is economically sound. Also, it must minimize the attack vectors like downtime and security raids.

What makes Polkadot Network unique?

Most second-generation blockchain ecosystems suffer from multiple limitations in terms of scalability, speed, and interoperability Gavin Wood, the founder of Ethereum, presented a heterogeneous multichain blockchain network, Polkadot, to manage these prevailing problems in the blockchain space.

Given that cross-chain communication is crucial for the growth of the blockchain ecosystem the mass option f blockchain across diverse enterprises, adoption has appeared as a next-generation layer-0 decentralized protocol.

Interoperability-rich ecosystem

Polkadot enables interoperability among a wide range of blockchain networks created as Parachains, Polkadot features bridges that permit two isolated blockchains to interact with each other.

While most third-generation blockchains have a shared purpose of managing interoperability problems, Polkadot excels with its attribute that helps cross-chain sharing of any arbitrary data, tokens, and assets rather than just the tokens.

Compatibility with Substrate framework

The Substrate is an open-source blockchain development framework created to assign the multichain future. Note that Equality technologies itself used Substrate to make the Polkadot network. Hence, every blockchain developed with the Substrate framework is inherently interoperable to the Polkadot, making an interoperability-rich ecosystem of non-identical blockchains.

Economic and transactional scalability

Economic scalability on the Polkadot is offered due to its procedure of appointing common validators to handle security on multiple blockchain networks.

Transactional scalability is provided on Polkadot with the approach of circulating transactions across multiple blockchain networks running independently on their chains.

Low-cost development

Compared to conventional blockchains, Polkadot drinks only a small fraction of power with its creative nominated proof-of-stake (pos) consensus algorithm, supporting the low-cost development of its ecosystem.

According to recent research conducted by CCRL- Crypto Carbon Ratings Institute, Polkadot has been rated as a blockchain protocol with a lower carbon footprint.

Unified security

Polkadot also stands separated from its companion blockchains in facilitating interoperability and the evolution of innovative dApps.

The heart of Polkadot, the Relay chain, is liable for delivering the network’s shared security, consensus, and cross-chain interoperability. Hence, Polkadot Parachain’s governance runs independently but is united in security.

DAO-based governance

Polkadot adopts a DAO-based refined governance model that gives the network’s stakeholders a voice, destroying the hierarchy system. Furthermore, upgrades on the Polkadot are ordained on-chain without the requirement of forking, where stakeholders are authorized to participate in determining the governance of the platform.

How does Polkadot help the development of cross-chain Web3 apps?

Created as a web3 blockchain interoperability work, Polkadot delivers a multichain ecosystem to create a wide range of cross-chain web3 applications. The network interconnects other blockchains, forming a decentralized web of blockchains.

Cross-chain applications made on the Polkadot can interact with the web3 applications, perform cross-chain computations, and support security across active chains.

Substrate Framework

Since Polkadot itself is built using the Substrate framework, a blockchain, and associated apps n Substr are automatically interoperable with Polk s Parachains and part threads. Substrate presents a range of tools and SDKs to support the development of cross-chain dApps.


Parachains are layer-1 blockchains that run with their runtime logic, native tokens, and stipulation for implementations and economies. Any blockchain created as a para chain becomes fully interoperable with the Relay chain and other Parachains. Hence, the Web3 applications produced on a park chain's ecosystem can interact cross-chain.


Parathreads deliver the same advantages as Parachains, such as cross-para chain interoperability, para chain-to-para chain communication through XCM, and support for the growth of cross-chain Web3 dApps. However, Parachains can leverage the Relay Chain’s security without needing to lease a para chain slot.


Para chain feels like allowing true interoperability. While Substrate-based chains and Parachains/ threads are inherently interoperable with each other, Polkadot scales more excellent interoperability with external blockchains like Ethereum through Web3 bridges. These bridges enable communication between blockchains, allowing them to share resources, arbitrary data, and digital assets seamlessly.


Although Polkadot was initially designed to address the interoperability problem, this network is now widely acknowledged as a scalable, quickly, and highly secured blockchain ecosystem, desiring to form a unified ecosystem of layer-1 blockchains.

As an open source blockchain protocol combined with web3 elements, Polkadot supports the development of cross-chain compatible apps and revolutionary decentralized apps that align with the current as well as future obligations of the decentralized world web.

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Contact US!

India india

Plot No- 309-310, Phase IV, Udyog Vihar, Sector 18, Gurugram, Haryana 122022

+91 8920947884


1968 S. Coast Hwy, Laguna Beach, CA 92651, United States

+1 9176282062

Singapore singapore

10 Anson Road, #33-01, International Plaza, Singapore, Singapore 079903

+ 6590163053