Cardano Joins IBC to Boost Connectivity to Other Blockchains


The Cardano Foundation has officially become part of the Inter-Blockchain Communication (IBC) alliance. As part of this collaboration, Cardano plans to integrate IBC using its native technologies. Notably, this integration will leverage Aiken and Mithril. The move aims to enhance Cardano's interoperability within the broader blockchain ecosystem.

About IBC

The IBC protocol is an open-source solution that facilitates data sharing and communication between different blockchains. It acts as a digital link connecting over 110 blockchain networks, enabling safe information sharing, asset exchange, and seamless interaction. Think of IBC as a digital bridge that links various blockchain networks, promoting interoperability and scalability. Annually, IBC processes 30 million token transactions valued at $30 billion.

The Interchain Foundation plays a crucial role in funding the development and maintenance of the IBC protocol. Simultaneously, a vibrant community of independent developers contributes voluntarily to enhance the protocol's features and capabilities.

The IBC protocol draws inspiration from the TCP/IP specification that forms the backbone of the internet. Just as TCP/IP enables seamless communication between computers, IBC establishes a universal framework for blockchains to communicate effectively. This framework allows different blockchains to interoperate securely and share data.

The IBC Transport Layer handles critical aspects of cross-chain communication. It deals with data packet transport, authentication, and ordering. Key components within this layer include:

  • Light Clients: These lightweight representations of destination chains reside within the source chain's state machine. They keep track of a counterparty blockchain's consensus algorithm by verifying block headers and Merkle proofs.
  • Connections: Responsible for linking different light clients, connections facilitate communication between chains.
  • Channels: Channels connect modules on the source chain to corresponding modules on the destination chain. Data packets flow seamlessly over this abstraction layer.
  • Relayers: These permissionless off-chain processes ferry data packets between chains. They scan chain states, construct transactions, and submit them to the relevant networks.
  • IBC Application Layer: Built on top of the transport layer, the IBC Application Layer enables feature-rich applications. Think of it as the layer where developers create applications that leverage cross-chain communication. Just as end-user applications sit atop TCP/IP, the IBC Application Layer allows developers to build powerful use cases across interconnected blockchains.

IBC facilitates secure, permissionless cross-chain interactions, allowing data to flow seamlessly across various blockchains.

Cardano Integration with IBC

The Cardano IBC Incubator project focuses on creating a bridge that enables information exchange between a Cardano blockchain and Cosmos SDK-based blockchains. It adheres to the IBC protocol and aims to fully comply with the essential parts of the specification needed for the developed framework.

Cardano's integration of IBC will entail the development of a sidechain. It offers significant advantages for businesses. A sidechain functions as an independent blockchain that operates in tandem with the main chain, linked through a two-way peg mechanism.

This strategy stands to benefit businesses in several ways. It provides them with flexibility in customizing blockchain solutions, enhances scalability to manage increased transaction volumes, creates opportunities for innovative cross-platform initiatives, and streamlines operational efficiency.

Integration with IBC has one more significant benefit. This offers the option for connecting Ethereum Virtual Machine (EVM)-based sidechains to Cardano. This will essentially enable the deployment of EVM-based DApps on Cardano sidechains.

Among other things, CF must build an Aiken-based Tendermint Light Client and IBC primitives implementation. Mithril will be used for threshold-based signatures and state proofs required for a native IBC connection.

It is worth noting that the current implementation leverages several frameworks maintained by the Cardano developer community. These include Pallas, Lucid, Ogmios, Kupo, and db-sync.

It is positive that native Cardano technologies are used to build interconnection solutions.


Cardano's integration with IBC represents a vital component within a comprehensive interoperability framework. The CF's initiative is just one piece of the puzzle.

Notably, Cardano has established interconnections with multiple blockchains through the Wanchain Bridge. This integration allows users within the Cardano ecosystem access to assets like USDT, USDC stablecoins, wrapped BTC, and various others.

Another noteworthy project to observe is the Rosen Bridge, which currently enables the interconnection of Ergo, Cardano, and Bitcoin. The team is actively working on connecting already supported chains with EVM-based chains.

Cardano's IBC connection is planned to go live in the coming months. Let's keep our fingers crossed that the integration will be successful.


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