chore(vetkeys): split basic_bls_signing into self-contained motoko + rust examples

[marc0olo]

Summary

Splits the vetkeys basic_bls_signing example into two self-contained examples (one per language) — the same restructure as #1443 (basic_ibe). Previously it lived only under rust/vetkeys/basic_bls_signing/ with a shared frontend/ symlinked into motoko/ and rust/ subdirs.

motoko/vetkeys/basic_bls_signing/   backend/app.mo + own frontend/ + icp.yaml + mops.toml
rust/vetkeys/basic_bls_signing/     backend/ (flattened) + own frontend/ + icp.yaml + Cargo.toml

Frontend

• Duplicated per language; bindings generated by the @icp-sdk/bindgen Vite plugin from the committed backend/backend.did (replaces the shared scripts/gen_bindings.sh).
• Slimmed (dropped eslint/gen_bindings.sh and the BACKEND-env dev logic); added a root workspace package.json so npm run dev / npm run build run from the example root.

Backend

• Motoko: idiomatic camelCase interface (signMessage, getMySignatures, getMyVerificationKey). moc 1.11.0 + --default-persistent-actors (dropped the redundant persistent keyword); dropped unused sha2. Committed backend/backend.did.
• Rust: unchanged (snake_case), relocated to the flattened layout.

Each frontend matches its own backend (Motoko camelCase / Rust snake_case).

Docs & CI

• README split per language (cross-linked); prerequisites link each tool with its command inline.
• vetkeys-basic-bls-signing.yml: motoko + rust jobs on the new paths, watching both, running test.sh.
• Baked in the two Copilot fixes from chore(vetkeys): split basic_ibe into self-contained motoko + rust examples #1443: the main.ts "Canister ID not set" error names backend, and test.sh calls the query method with --query.

CODEOWNERS

Unchanged — /motoko/vetkeys/ and /rust/vetkeys/ both map to @dfinity/core-protocol.

Verification (local)

• Motoko: frontend build + tsc --noEmit clean, icp deploy, test.sh PASS, and a signed message survives an upgrade.
• Rust: cargo/wasm build + icp deploy, test.sh PASS.
• Both frontends build and serve.

Part of the vetkeys split series (after #1443). Remaining: encrypted_notes_app_vetkd, password_manager, password_manager_with_metadata.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR restructures the vetkeys/basic_bls_signing example into two fully self-contained examples (Motoko + Rust), each with its own frontend, backend config, and build/test entrypoints—mirroring the earlier basic_ibe split and removing the prior shared-frontend/symlink workflow.

Changes:

• Split the example into motoko/vetkeys/basic_bls_signing and rust/vetkeys/basic_bls_signing, each with independent frontend + project root workspace package.json.
• Replaced the legacy bindings generation script with @icp-sdk/bindgen via the Vite plugin, generating bindings from committed backend/backend.did.
• Updated CI workflow to run deploy + test.sh for both language variants on the new paths.

Reviewed changes

Copilot reviewed 31 out of 38 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
rust/vetkeys/basic_bls_signing/test.sh	Adds a basic CLI test script for the Rust variant.
rust/vetkeys/basic_bls_signing/rust/backend/Makefile	Removes legacy wasm build / candid extraction Make targets.
rust/vetkeys/basic_bls_signing/rust-toolchain.toml	Adds wasm32 target configuration for the Rust toolchain.
rust/vetkeys/basic_bls_signing/README.md	Updates Rust README for the new self-contained layout, workflow, and bindgen approach.
rust/vetkeys/basic_bls_signing/package.json	Adds a root workspace package.json to run frontend scripts from the example root.
rust/vetkeys/basic_bls_signing/motoko/mops.toml	Removes the old Motoko config from the former shared Rust directory layout.
rust/vetkeys/basic_bls_signing/icp.yaml	Renames canisters to backend/frontend, updates rust recipe version, and updates frontend build dir/commands.
rust/vetkeys/basic_bls_signing/frontend/vite.config.ts	Switches dev/build flow to @icp-sdk/bindgen and simplifies dev-server wiring for local deploys.
rust/vetkeys/basic_bls_signing/frontend/src/main.ts	Updates frontend bindings import path and canister env key from basic_bls_signing to backend.
rust/vetkeys/basic_bls_signing/frontend/scripts/gen_bindings.sh	Removes legacy binding generation script.
rust/vetkeys/basic_bls_signing/frontend/package.json	Simplifies frontend package scripts/deps and adds @icp-sdk/bindgen.
rust/vetkeys/basic_bls_signing/frontend/eslint.config.mjs	Removes ESLint config as part of frontend slimming.
rust/vetkeys/basic_bls_signing/frontend/.gitignore	Adds ignores for node_modules, dist, and generated bindings.
rust/vetkeys/basic_bls_signing/Cargo.toml	Adds a workspace root and release profile settings for the Rust example.
rust/vetkeys/basic_bls_signing/backend/src/types.rs	Adds backend type definitions and stable-structure serialization for signatures.
rust/vetkeys/basic_bls_signing/backend/src/lib.rs	Adds the Rust canister implementation in the flattened backend/ layout.
rust/vetkeys/basic_bls_signing/backend/Cargo.toml	Renames the crate to backend for the new layout.
rust/vetkeys/basic_bls_signing/backend/backend.did	Adds committed Candid interface for the Rust backend.
motoko/vetkeys/basic_bls_signing/test.sh	Adds a basic CLI test script for the Motoko variant.
motoko/vetkeys/basic_bls_signing/README.md	Adds Motoko README aligned with the new self-contained structure and tooling.
motoko/vetkeys/basic_bls_signing/package.json	Adds a root workspace package.json to run frontend scripts from the example root.
motoko/vetkeys/basic_bls_signing/mops.toml	Adds Motoko toolchain/deps and candid configuration for the Motoko variant.
motoko/vetkeys/basic_bls_signing/icp.yaml	Adds Motoko icp.yaml with backend/frontend canisters and asset build steps.
motoko/vetkeys/basic_bls_signing/frontend/vite.config.ts	Adds Vite config with bindgen plugin and local-dev cookie/proxy wiring.
motoko/vetkeys/basic_bls_signing/frontend/tsconfig.json	Adds TypeScript configuration for the Motoko frontend.
motoko/vetkeys/basic_bls_signing/frontend/src/vite-end.d.ts	Adds Vite client type reference.
motoko/vetkeys/basic_bls_signing/frontend/src/style.css	Adds frontend styling.
motoko/vetkeys/basic_bls_signing/frontend/src/main.ts	Adds the Motoko frontend app using generated bindings and II auth client wiring.
motoko/vetkeys/basic_bls_signing/frontend/public/.ic-assets.json5	Adds hardened asset canister security policy headers.
motoko/vetkeys/basic_bls_signing/frontend/package.json	Adds Motoko frontend package scripts/deps and bindgen devDependency.
motoko/vetkeys/basic_bls_signing/frontend/index.html	Adds Vite entry HTML.
motoko/vetkeys/basic_bls_signing/frontend/.gitignore	Adds ignores for node_modules, dist, and generated bindings.
motoko/vetkeys/basic_bls_signing/backend/backend.did	Adds committed Candid interface for the Motoko backend (camelCase API).
motoko/vetkeys/basic_bls_signing/backend/app.mo	Adds Motoko canister implementation with camelCase API surface.
.github/workflows/vetkeys-basic-bls-signing.yml	Updates CI to run separate Motoko + Rust jobs on the new paths, including test.sh.

Comments suppressed due to low confidence (1)

motoko/vetkeys/basic_bls_signing/backend/app.mo:13

• shared actor class relies on --default-persistent-actors, but per AGENTS.md:226 that flag does not make actor class persistent. Since this actor class stores mutable state in signatures, upgrades may lose user signatures unless the class is explicitly persistent.

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[marc0olo]

Addressed the Copilot review:

• test.sh comments — resolved by removing test.sh from this example. It had none on master (only the basic_vetkd template ships one), so CI is now deploy-only, matching the original workflow. The deploy verifies build + install for both backends and the frontend.

• Persistence (suppressed comment) — verified empirically that the --default-persistent-actors flag does persist this main-canister actor class: signed a message, ran icp deploy again (an upgrade, not reinstall), and the signature survived. AGENTS.md:226 refers to actor classes spawned as sub-WASMs (child canisters, e.g. canister_factory), not a main canister that is an actor class only to take its keyName init arg. Dropping the flag isn't an option either — without it and without persistent, moc 1.11.0 hard-errors M0219 (vars implicitly transient). Kept the flag (no persistent keyword) as the forward-compatible choice, and dropped the redundant class-level shared (shared actor class → actor class; only the method-level public shared ({ caller }) is needed).

[Copilot]

Pull request overview

Copilot reviewed 30 out of 36 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (2)

motoko/vetkeys/basic_bls_signing/backend/app.mo:13

• The canister is defined as a non-persistent actor class, but later comments (and the example’s intended behavior) assume signatures survives upgrades. With --default-persistent-actors, the top-level actor is made persistent by default, but actor class declarations still need to be explicitly persistent to retain state across upgrades.
  rust/vetkeys/basic_bls_signing/icp.yaml:6
• The Rust canister recipe’s configuration block is missing package: backend. Most Rust examples in this repo specify the Cargo package explicitly; without it the build can fail or select the wrong crate when using a workspace layout.