Atomic Bonded Cross-chain Debt

M. Tefagh, F. Bagheri, A. Khajehpour, and M. Abdi
  • ABCD (You may need to configure your browser for Unstoppable Domains.)
    Inspired by the recent boom in decentralized finance (DeFi) and the unprecedented success of flash loan projects in this ecosystem, we introduce a decentralized debt derivative named atomic bonded cross-chain debt (ABCD) to bridge the gap between the growth of lending protocols on Ethereum and other UTXO-based blockchains specifically Bitcoin. We think of ABCD as the alphabet of interoperability for DeFi and as a credit infrastructure which unlike the current protocols is not limited by requiring either smart contracts, over-collateralization, or instantaneous payback.

  • Featured in the Primafelicitas blog post

  • Best presentation award
    Selected as the best presentation of computer and information engineering session of the 2020 3rd International Conference on Electronics and Communication Engineering (ICECE 2020) and 2020 3rd International Conference on Blockchain Technology and Applications (ICBTA 2020).

  • Manuscript
    This is a post-peer-review, pre-copyedit version of an article published in the proceedings of ICBTA 2020. The definitive authenticated version is available online at:

  • Demo
    Showcased in the demonstration session of IEEE International Conference on Blockchain and Cryptocurrency (ICBC 2021)

  • Reference implementation
    The codebase to reproduce the proof-of-concept described in the video below.