Bitcoin DeFi on Cardano has reached its peak with the first BTC-ADA atomic swap

This development opens the doors for Cardano users to start trustless transactions involving BTC and ADA, with low gas fees and without any security risks.

The crypto sector may be struggling with the ongoing bear market, but some projects are steadily building and expanding their ecosystems. One is Cardano, which has reached a milestone in Bitcoin's decentralized finance (DeFi) integration by completing the first atomic swap between BTC and its blockchain-native asset ADA.

As stated on Twitter, Cardano-based DeFi platform Fluid Tokens has completed the transaction, exchanging 0.0001 native BTC for 50 native ADA. Such a move shows that the Cardano team has succeeded in making BTC available on a verified blockchain.

The first BTC-ADA atomic swap

Fluid Tokens offers services such as lending, borrowing, staking, NFT rentals and cross-chain liquidity on Cardano and Bitcoin. A multi-chain platform uses user assets to access different services. According to data from Mempool, the BTC-ADA Atomic Swap was launched in 2018. Occurred on March 25 at a charge rate of 15.0sat/vB.

The transaction is advantageous as it does not require any third party intermediaries such as centralized exchanges. As always with AtomicSwap, everything is facilitated by modern contracts. This development opens the doors for Cardano users to start trustless transactions involving BTC and ADA, with low gas fees and without any security risks.

Cardano has been highly interested in functionality for years, integrating the Bitcoin network with a trustless bridge. In the year In October 2024, the network announced a partnership with BitcoinOS (BOS) to provide users with BTC capital, a project to boost Web3 adoption through EMURGO. BOS is the Bitcoin smart contract operating system.

The partnership aims to integrate the BOS Grail Bridge into Cardano's blockchain framework, providing access to Bitcoin's $1.3 trillion capital using zero-knowledge (ZK) proofs without relying on third-party intermediaries. That move set the stage for the interoperability that blossomed between Bitcoin and Cardano last year.

Developing deeper connections between Bitcoin and Cardano

Around this time last year, Cardano was gearing up for the launch of Bitcoin DeFi by allowing the trustless BOS Grail to bridge. By May 2025, the wheels were set in motion. Cardano is the first layer-1 chain to use BOS to enable DeFi applications such as Fluid Tokens to provide BTC functionality to their users.

You may also like:

Breaking BTC-ADA's goal of atomic swaps, decentralized applications on Cardano are working to leverage the scalability and programmability of BOS to create deeper interoperability between Bitcoin and Cardano's modern contract infrastructure.