feat: BCS ABNF compile-time generation

.github/workflows/lints.yml

@@ -40,6 +40,10 @@ jobs:
         if: (!github.event.pull_request.draft || contains(github.event.pull_request.body, '[run-ci]'))
         run: make doc
 
+      - name: BCS schema
+        if: (!github.event.pull_request.draft || contains(github.event.pull_request.body, '[run-ci]'))
+        run: BCS_SCHEMA=1 cargo check -p iota-sdk-types --features bcs-schema
+
       - run: make is-dirty
 
   cargo-deny:

Cargo.toml

@@ -1,6 +1,7 @@
 [workspace]
 resolver = "2"
 members = [
+  "crates/iota-bcs-schema",
   "crates/iota-sdk",
   "crates/iota-sdk-crypto",
   "crates/iota-sdk-ffi",
@@ -42,6 +43,7 @@ thiserror = "2.0"
 tokio = "1.40.0"
 variadics_please = "1.1"
 
+iota-bcs-schema = { version = "0.0.0", path = "crates/iota-bcs-schema" }
 iota-crypto = { version = "0.0.1-alpha.1", package = "iota-sdk-crypto", path = "crates/iota-sdk-crypto", default-features = false }
 iota-graphql-client = { version = "0.0.1-alpha.1", package = "iota-sdk-graphql-client", path = "crates/iota-sdk-graphql-client", default-features = false }
 iota-graphql-client-build = { version = "0.0.1-alpha.1", package = "iota-sdk-graphql-client-build", path = "crates/iota-sdk-graphql-client-build", default-features = false }

crates/iota-bcs-schema/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "iota-bcs-schema"
+version = "0.0.0"
+authors = ["IOTA Foundation <info@iota.org>"]
+edition = "2024"
+license = "Apache-2.0"
+publish = false
+repository = "https://github.com/iotaledger/iota-rust-sdk/"
+description = "A procedural macro to generate BCS schema definitions for Rust types in ABNF format"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "2", features = ["full"] }