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* feat(protocol): Early Bitcoin refund Alice can choose to let Bob refund his Bitcoin early (before TxCancel timelock expires) * feat: Let Bob check for TxEarlyRefund * fix: compile errors feat(alice): if we cannot lock Monero within 2 minutes, early refund bitcoin * satisfy clippy * fix(gui): Emit tauri event when Bitcoin is early refunded * tests progress * rename AliceStates * progress: working prototype! * add unit tests for tx_early_refund construction (tx_early_refund_can_be_constructed_and_signed, tx_early weight check) * fix compile error in swap/tests/alice_zero_xmr_early_refund.rs * only make [`tx_early_refund_sig_bob`] optional in state machine, not message machine * feat: working integration test alice_zero_xmr_early_refund.rs * fix tests * add changelog entry, add integration test with broken monero-wallet-rpc simulation * amend * amend changelog * nitpick * feat(gui): Bump MIN_ASB_VERSION to 2.0.0 * feat(bob): explicitly check for tx_early_rewfund * refactor(bob): Assume tx_early_refund will not be published if timelock has expired * add todo * refactor * refactor(swap): Differentiate between BtcRefundPublished, BtcEarlyRefundPublished, BtcEarlyRefunded and BtcRefunded * refactor: move weight of tx_early into TX_EARLY_REFUND_WEIGHT const * efactor(swap): Differentiate between BtcRefundPublished,BtcEarlyRefundPublished, BtcEarlyRefunded and BtcRefunded * small refactors * nitpciks * dprint fmt * add context to get_raw_transaction * refactor: remove duplicated code in watch_for_redeem_btc, dprint fmt * fix: parse -5 electrum transaction not found error correctly * refactor: send btc_refund_finalized flag to tauri with BtcRefunded state * remove uncessary .context * dprint dfmt * remove unused import * refactor: explicitly mark state3.expired_timelocks(...) as transient error when locking Monero * use .context instead of ok_or_else(...) * fix: in get_raw_transaction also check for "missing transaction" * add 4 different types of tauri events for different refund states * display BobStateName.BtcEarlyRefunded as done state * add global bottom to DialogContentText * fix(gui): Add missing padding in SwapDialog * proof of concept: electrum load balancer * load balancer progress * wrap Mutex<Vec<Arc<BdkElectrumClient<Client>>>> in electrum_balancer in another Arc, free locks as fast as possible * refactor * refactor(electrum balancer): use OnceCell to do lazy initilization * tests * refactor(electrum): enhance error handling with MultiError for comprehensive failure analysis This commit introduces a robust MultiError system for the Electrum balancer that collects and exposes all individual node failures, enabling better error analysis and decision making. Key improvements: - Add MultiError struct with methods for inspecting all collected errors from failed nodes - Modify electrum_balancer::call() to return MultiError instead of single Error - Enhance Client::get_tx() to properly detect transaction-not-found across multiple nodes - Add call_async_with_multi_error() method for detailed async error analysis - Improve error tracing and logging throughout the Bitcoin wallet operations - Add comprehensive test coverage for MultiError functionality and edge cases - Remove obsolete should_retry_on_error() logic in favor of MultiError inspection The MultiError type maintains backward compatibility through automatic conversion to Error while providing rich error analysis capabilities for callers that need detailed failure information. This particularly improves handling of transaction-not-found scenarios where different nodes may return different error formats. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com> * add changelog entry for electrum node balancing * refactors of electrum balancer * only warn if .check_for_tx_early_refund fails * clippy * remove verbose message * use AtomicUsize * final touches * log libp2p crates * merge master * display LinearProgressWithSubtitle as indeterminate if progress=100% * let broadcast return a MultiError, log all libp2p crates * nitpick * make clippy happy * log "kind" for join_all load balancer * add kind to join_all method, show warning alert if alice takes a long time to redeem Bitcoin * parse multierrors correctly * fmt --------- Co-authored-by: Claude <noreply@anthropic.com> |
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XMR to BTC Atomic Swap
This repository hosts an MVP for atomically swapping BTC to XMR. It implements the protocol described in section 3 of this paper.
More information about the protocol in this presentation and this blog post.
Currently, swaps are only offered in one direction with the swap CLI on the buying side (send BTC, receive XMR).
We are working on implementing a protocol where XMR moves first, but are currently blocked by advances on Monero itself.
You can read this blogpost for more information.
Quick Start
- Download the latest
swapbinary release for your operating system. - Find a seller to swap with:
./swap --testnet list-sellers
- Swap with a seller:
./swap --testnet buy-xmr --receive-address <YOUR MONERO ADDRESS> --change-address <YOUR BITCOIN CHANGE ADDRESS> --seller <SELLER MULTIADDRESS>
For more detailed documentation on the CLI, see this README.
Becoming a market maker
Swapping of course needs two parties - and the CLI is only one of them: The taker that occasionally starts a swap with a market maker.
If you are interested in becoming a market maker you will want to run the second binary provided in this repository: asb - the Automated Swap Backend.
Detailed documentation for the asb can be found in this README.
Safety
This software is using cryptography that has not been formally audited. While we do our best to make it safe, it is up to the user to evaluate whether or not it is safe to use for their purposes. Please also see section 15 and 16 of the license.
Keep in mind that swaps are complex protocols, it is recommended to not do anything fancy when moving coins in and out. It is not recommended to bump fees when swapping because it can have unpredictable side effects.
Contributing
We encourage community contributions whether it be a bug fix or an improvement to the documentation. Please have a look at the contribution guidelines.
Rust Version Support
Please note that only the latest stable Rust toolchain is supported. All stable toolchains since 1.74 should work.
Contact
Feel free to reach out to us in the COMIT-Monero Matrix channel.