mirror of
https://github.com/logos-messaging/nim-sds.git
synced 2026-07-03 14:29:26 +00:00
145e5d6459
The Persistence contract previously returned `Future[void]` for writes and `Future[ChannelSnapshot]` for the loader, with `raises: []`. Backends had no way to report a failure, so a failed write or a failed/partial read was silently swallowed — and on the read path a mid-scan failure could bootstrap a *truncated* channel snapshot, corrupting the rebuilt bloom filter and lamport clock across a restart. Make every contract field Result-returning: * mutating ops -> Future[Result[void, string]] * loadAllForChannel -> Future[Result[ChannelSnapshot, string]] The backend-supplied error string is mapped to a new `ReliabilityError.rePersistenceError` (logged once at the boundary via `reliabilityErr`) and threaded up through every persistence-touching proc to the public API, where the caller decides what to do. Request-driven paths (wrap/unwrap/markDependenciesMet/ensureChannel/removeChannel/reset) propagate the error; background maintenance loops (periodicBufferSweep, periodicRepairSweep) log and retry on the next tick, since they have no synchronous caller. Tests: in-memory backend gains a `failingOps` injection hook; new "Persistence: error propagation" suite asserts read/write/drop failures surface as `rePersistenceError`. Full suite passes (90 OK). BREAKING CHANGE: the `Persistence` contract signature changed; custom backends must return `Result` and `ok()` on success. Bumped to 0.3.0. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
nim-sds
Nim implementation of the e2e reliability protocol.
Prerequisites
- Nix package manager
Quick start
git clone https://github.com/logos-messaging/nim-sds.git
cd nim-sds
# Build the shared library
nix build '.#libsds'
# Run tests
nix develop --command nimble test
Building
Desktop
nix build --print-out-paths '.#libsds'
Android
nix build --print-out-paths '.#libsds-android-arm64'
nix build --print-out-paths '.#libsds-android-amd64'
nix build --print-out-paths '.#libsds-android-x86'
nix build --print-out-paths '.#libsds-android-arm'
iOS
nix build --print-out-paths '.#libsds-ios'
Development shell
Enter the dev shell:
nix develop
Build using nimble tasks:
# Dynamic library (auto-detects OS)
nimble libsdsDynamicMac # macOS
nimble libsdsDynamicLinux # Linux
nimble libsdsDynamicWindows # Windows
# Static library
nimble libsdsStaticMac # macOS
nimble libsdsStaticLinux # Linux
nimble libsdsStaticWindows # Windows
Run tests:
nimble test
The built library is output to build/.
Android (without Nix)
Download the latest Android NDK:
cd ~
wget https://dl.google.com/android/repository/android-ndk-r27c-linux.zip
unzip android-ndk-r27c-linux.zip
Add to ~/.bashrc:
export ANDROID_NDK_ROOT=$HOME/android-ndk-r27c
export PATH=$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH
Then build:
ARCH=arm64 nimble libsdsAndroid
| Architecture | Command |
|---|---|
| arm64 | ARCH=arm64 nimble libsdsAndroid |
| amd64 | ARCH=amd64 nimble libsdsAndroid |
| x86 | ARCH=x86 nimble libsdsAndroid |
The library is output to build/libsds.so.
Dependency management
Dependencies are managed by Nimble and pinned via nimble.lock.
To set up dependencies locally:
nimble setup -l
To update dependencies:
nimble lock
After updating nimble.lock, the Nix outputHash in nix/deps.nix must be recalculated
by running nix build and updating the hash from the error output.
License
Licensed under either of Apache License, Version 2.0 or MIT license at your option.