Cyract · #1 ·
Hey everyone,
I’ve built and open-sourced a practical, non-custodial implementation of cross-chain atomic swaps and basic lending using Taproot + Discreet Log Contracts (DLCs). Sharing it here for feedback and discussion.
What it does
- Trustless atomic swaps and conditional lending between Bitcoin (Taproot) and other Taproot-compatible chains (Fractal Bitcoin, potentially Litecoin, etc.).
- Fully non-custodial: users keep control of keys at all times.
- Uses adaptor signatures + oracle attestations for settlement.
- Built on Tadge Dryja’s DLC spec with Taproot for better privacy and efficiency.
Live early demo: https://bridge.thelonelybit.org Full open-source repo (builders, signers, DLC contract logic, PSBT workflows, lending primitives): https://github.com/The-Lonely-Bit/Taproot-based_Discreet_Log_ContractsIt’s still in controlled beta (not fully public mainnet launch yet), but the core contracts are functional and the code is public for review.
Purpose
The goal is to provide a Bitcoin-native, trustless way for users to move value and access liquidity across Taproot-compatible chains without custodians, wrapped tokens, or centralized bridges, or new metaprotocols. This is especially aimed at giving individuals in regions with capital controls and financial surveillance a censorship-resistant option using pure cryptographic guarantees.
I’m looking for technical feedback around :
- Contract design and Taproot script usage
- PSBT flows and signing logic
- DLC builder primitives and reusability
- Any improvements to efficiency or edge cases
This is meant to be a practical contribution to DLC tooling in the Bitcoin ecosystem, Any eyes on the GitHub and thoughts on the implementation would be greatly appreciated.
Thanks !