Migrate flutter_rust_bridge from v1 to v2

[erdemyerebasmaz]

This PR addresses the bare minimum requirements to migrate flutter_rust_bridge from v1 to v2.

Changelist:

• Cleaned up frb v1 files
• Config settings are now read from flutter_rust_bridge.yaml configuration file

Breaking changes:

• u64 fields are now generated as BigInt instead of int to prevent precision loss:
  • Use BigInt.from(num) when assigning.
  • Use .toInt() to cast back to int.
• Updated import path for SDK bindings:
  • Old: import 'package:breez_sdk/bridge_generated.dart'
  • New: import 'package:breez_sdk/sdk.dart'

Test Build Runs on C-Breez:

• Build Android
• Build iOS

[Copilot]

Pull Request Overview

This PR migrates the Flutter Rust Bridge integration from v1 to v2 by cleaning up old v1 artifacts, introducing a YAML config for codegen, and updating generated bindings and imports throughout the Dart and Rust layers.

• Updated Dart package settings and dependencies for FRB v2 in pubspec.yaml
• Switched FRB codegen to use flutter_rust_bridge.yaml and updated the Makefile
• Renamed and re-exported new v2-generated modules, and adjusted Rust bindings

Reviewed Changes

Copilot reviewed 37 out of 37 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
libs/sdk-flutter/pubspec.yaml	Bumped FRB version, reorganized deps/env, added publish settings
libs/sdk-flutter/flutter_rust_bridge.yaml	New codegen configuration for FRB v2
libs/sdk-flutter/makefile	Changed codegen command to generate, output folder
libs/sdk-flutter/lib/native_toolkit.dart	Updated library loader to use ExternalLibrary API
libs/sdk-flutter/lib/sdk.dart	Re-exported new v2-generated Dart binding files
libs/sdk-core/src/lib.rs	Renamed generated module to frb_generated
libs/sdk-core/src/binding.rs	Updated imports, error mappings, and listener setup

Comments suppressed due to low confidence (4)

libs/sdk-flutter/lib/native_toolkit.dart:10

• [nitpick] The function name createLibraryImpl is ambiguous; consider renaming it to something like loadExternalLibrary or getExternalLibrary for clarity.

ExternalLibrary createLibraryImpl() {

libs/sdk-flutter/makefile:14

• [nitpick] Consider adding flutter_rust_bridge to the .PHONY target list to ensure it’s always treated as a phony target and avoid conflicts with files of the same name.

flutter_rust_bridge:

libs/sdk-flutter/lib/native_toolkit.dart:8

• Verify that breez_sdkFFI matches the actual iOS framework name; if the framework target has a different name (e.g., breez_sdk_bindings), this will fail to load.

const _iosLibName = "breez_sdkFFI";

libs/sdk-core/src/binding.rs:30

• You’ve added a map_err reference to LnUrlAuthError but not imported it; add LnUrlAuthError to this import list to avoid unresolved type errors.

use sdk_common::prelude::{LnUrlPayError, LnUrlWithdrawError};

[roeierez]

Looks good!

[dangeross]

LGTM

Did you consider migrating to an instance/async approach like in Nodeless also? (edit: just read bare minimum and maybe best not to make too many breaking changes)