feat(bob): Non-interactive transfer proof (#818)

* Upgrade toolchain to rustc 1.89.0

* Switch from curve25519-dalek-ng to curve25519-dalek in most places except the DLEQ proof system

* Remove CliCommand::BuyXmr everywhere

* New monero-wallet-ng with confirmations / scanner subscriptions and transaction verification

* monero-wallet-ng: examples (could be pruned)

* monero-wallet: split into wallets, listener, lib modules

* monero-sys: remove Wallets::wait_until_confirmed(...) in favour of monero-wallet-ng

* swap(alice): replace monero-sys in favour monero-wallet-ng of wait_until_confirmed

* swap(bob): rename XmrLockProofReceived -> XmrLockTransactionCandidate, add new XmrLockTransactionSeen, extract helpers into common.rs, use monero-wallet-ng helpers, add new TransferProofMaybeWithTxKey

* gui: add BobStateName.XmrLockTransactionSeen to guards

* helpers: state3.infallible_recv_transfer_proof(...), infallible_wait_for_xmr_lock_confirmation(...), never go into XmrLockTransactionSeen directly

* fmt

* monero-wallet-ng: remove examples

* progress

* nitpick: remove _ng suffix

* fix underflow in absolute_confirmations_into_relative, use GuaranteedScanner

* rename .wait_for_incoming_transfer_ng to .wait_for_incoming_transfer

* replace map_err with context

* document some more behaviour

* clarify naiveness of scanner

* add changelog entry

* prune: remove old WatchRequest everywhere

* bump rust toolchain to 1.90 and move shared deps into workspace

* bob: add intermediate WaitingForCancelTimelockExpiration state

* bob: do not explicitly check for tx lock timelock status before watching for tx redeem

* bob: use env_config.monero_finality_confirmations, dont try to redeem indefinitely upon cooperative redeem

* add monero_wallet_ng to tracing

* monero-wallet-ng: reset backoff upon success, instrument span into tokio tasks

* add VerifyingXmrLockTx and VerifyingXmrLockTx tauri state

* bob: check for tx_redeem and timelock state concurrently during pre-requisite check before sending enc sig

* fix(monero-wallet-ng): correctly instrument span

* monero-wallet-ng: use normal Scanner instead of GuaranteedScanner

* storeListener.ts: do init tasks in parallel

* nitpick: remove dead code in background.ts

* add PreflightEncSig and InflightEncSig tauri events

* fix closure calls

* final nitpciks

* fix setup-build-environment/action.yml

* fix typo

* zeroize to match monero-oxide version

* last nitpicks

* scan blocks in batches

* nitpick

* add happy_path_alice_does_not_send_transfer_proof integration test

Author: binarybaron

.github/actions/setup-build-environment/action.yml

@@ -33,7 +33,7 @@ runs:
         corepack enable
 
     - name: Install Rust stable
-      uses: dtolnay/rust-toolchain@1.88
+      uses: dtolnay/rust-toolchain@1.90
       with:
         targets: ${{ inputs.target }}
 

.github/workflows/ci.yml

@@ -180,6 +180,8 @@ jobs:
             test_name: alice_empty_balance_after_started_btc_early_refund
           - package: swap
             test_name: alice_broken_wallet_rpc_after_started_btc_early_refund
+          - package: swap
+            test_name: happy_path_alice_does_not_send_transfer_proof
           - package: monero-tests
             test_name: reserve_proof
           - package: monero-tests

.github/workflows/draft-new-release.yml

@@ -74,7 +74,7 @@ jobs:
         id: make-commit
         env:
           DPRINT_VERSION: "0.50.0"
-          RUST_TOOLCHAIN: "1.88.0"
+          RUST_TOOLCHAIN: "1.90.0"
         run: |
           rustup component add rustfmt --toolchain "$RUST_TOOLCHAIN-x86_64-unknown-linux-gnu"
           curl -fsSL https://dprint.dev/install.sh | sh -s $DPRINT_VERSION

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- GUI (Taker): Previously takers had to receive the Monero transfer proof from the maker over the network. This required interactivity meaning that if the peer-to-peer connection was lost, the taker might not detect that the Monero were locked. This would cause unnecessary refunds of swaps that could have otherwise succeded. The taker will now scan the view-only Monero wallet in the background (while concurrently waiting for the transfer proof over the network). The taker will detect if the Monero are locked even if peer-to-peer connection to the other party is lost. This significantly improves the reliability of swaps.
+- GUI: Fix an issue where it'd take a while for swaps to show up after a restart.
+
 ## [3.5.2] - 2025-12-08
 
 ## [3.5.1] - 2025-12-07