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Crypto Glossary/Parachain


Parachains are parallel chains that run alongside the main Polkadot chain, increasing scalability and interoperability. They allow for customized decentralized applications with their own governance models and can

TLDR - Parachain

A parachain is a term used in the context of blockchain technology, specifically in the Polkadot network. It refers to a parallel chain that runs alongside the main Polkadot chain, allowing for increased scalability and interoperability. Parachains are designed to handle specific use cases or applications, enabling developers to build decentralized applications (dApps) with their own set of rules and governance. They can communicate and share data with other parachains and the main Polkadot chain, creating a connected and interoperable ecosystem.

What is a Parachain?

A parachain is a parallel chain that operates alongside the main Polkadot chain. It is a fundamental component of the Polkadot network, which aims to solve the scalability and interoperability challenges faced by traditional blockchains. Parachains are designed to be highly customizable and can be tailored to specific use cases or applications. They enable developers to build decentralized applications (dApps) with their own governance models, consensus mechanisms, and economic systems.

Scalability and Interoperability

One of the primary reasons for the introduction of parachains is to address the scalability limitations of traditional blockchains. By running in parallel to the main chain, parachains can process transactions and execute smart contracts independently, significantly increasing the network's overall capacity. This parallel processing capability allows for higher transaction throughput and reduces congestion on the main chain.

Parachains also enhance interoperability within the Polkadot network. They can communicate and share data with each other and the main chain, enabling seamless transfer of assets and information across different parachains. This interoperability fosters collaboration and synergy between various dApps and parachains, creating a connected ecosystem where different applications can interact and leverage each other's functionalities.

Customizability and Governance

Parachains offer a high degree of customizability, allowing developers to design and implement their own rules, consensus mechanisms, and economic models. This flexibility enables the creation of specialized blockchains optimized for specific use cases or industries. For example, a parachain can be tailored for decentralized finance (DeFi) applications, gaming platforms, supply chain management, or any other domain that requires unique features and functionalities.

Each parachain has its own governance model, which determines how decisions are made and protocols are updated. This governance can be community-driven, stakeholder-based, or follow any other governance mechanism chosen by the parachain's developers. The ability to customize governance allows for experimentation and innovation in blockchain governance, potentially leading to more efficient and decentralized decision-making processes.

Security and Reliability

While parachains operate independently, they benefit from the security and reliability of the Polkadot network. Polkadot's shared security model ensures that the main chain's validators also secure the parachains. This shared security mechanism provides a higher level of protection against attacks and makes it more difficult for malicious actors to compromise the network.

Parachains can also leverage the Polkadot network's consensus mechanism, known as nominated proof-of-stake (NPoS). NPoS allows token holders to nominate validators who secure the network and participate in block production. This consensus mechanism ensures the integrity and reliability of the parachains, making them resistant to censorship and manipulation.


Parachains are a key innovation in the blockchain space, particularly within the Polkadot network. They offer increased scalability, interoperability, customizability, and security. By running in parallel to the main chain, parachains enable developers to build specialized decentralized applications with their own governance models. This flexibility and connectivity foster collaboration and innovation, creating a vibrant ecosystem of interconnected dApps. As blockchain technology continues to evolve, parachains are likely to play a crucial role in enabling the next generation of decentralized applications and services.

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