WASM

[dangeross]

This is a tracking issue to manage the WASM implementation of the Breez SDK.

Tasks

• [x] Test different WASM/WASI/emscripten build methods
• [ ] Identify changes required for Breez SDK / Greenlight
• [ ] Investigate generation of WASM bindings from UDL

Research

• Prokio An asynchronous runtime compatible with WebAssembly and non-WebAssembly targets
• Strings in WASM
• WASIX WASI ABI plus additional non-invasive syscall extensions
• WASM GC WASM Garbage Collection
• Tokio Tungstenite WebSocket library and Tokio bindings/wrappers

Issues

• Allow async traits
  • https://github.com/rustwasm/wasm-bindgen/issues/2409
• WASM incompatibilities GRPC
  • https://github.com/forbole/cosmos-rust-wallet/issues/4
• Building WASM on macOS
  • https://github.com/rust-bitcoin/rust-secp256k1/issues/134
• Transitive dependency bitcoinconsensus doesn't build for WASM
  • https://github.com/rust-bitcoin/rust-bitcoinconsensus/issues/32
• Can't use ring on wasm32-unknown-unknown die to a missing import
  • https://github.com/briansmith/ring/issues/1453
  • https://github.com/briansmith/ring/pull/1754
• Support wasm (socket2)
  • https://github.com/rust-lang/socket2/issues/268
• Rusqlite: Error building for wasm32-wasi
  • https://github.com/rusqlite/rusqlite/issues/1408
• Rusqlite: Add wasm32-unknown-unknown support
  • https://github.com/rusqlite/rusqlite/pull/1010
• gRPC transport over WebSocket
  • https://github.com/hyperium/tonic/issues/491
• reqwest: Wasm Support
  • https://github.com/seanmonstar/reqwest/issues/288
  • https://github.com/seanmonstar/reqwest/pull/630
• Status of rust+C bindings for wasm targets
  • https://github.com/rustwasm/team/issues/291#issuecomment-1343315089