refactor(barretenberg-rs): migrate to ipc-codegen + ipc-runtime; drop PipeBackend

barretenberg/acir_tests/yarn.lock

@@ -24,6 +24,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@aztec/bb.js@portal:../../ts::locator=bbjs-test%40workspace%3Abbjs-test"
   dependencies:
+    "@aztec/ipc-runtime": "portal:../../ipc-runtime/ts"
     comlink: "npm:^4.4.1"
     commander: "npm:^12.1.0"
     idb-keyval: "npm:^6.2.1"
@@ -39,6 +40,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@aztec/bb.js@portal:../../ts::locator=browser-test-app%40workspace%3Abrowser-test-app"
   dependencies:
+    "@aztec/ipc-runtime": "portal:../../ipc-runtime/ts"
     comlink: "npm:^4.4.1"
     commander: "npm:^12.1.0"
     idb-keyval: "npm:^6.2.1"
@@ -50,6 +52,18 @@ __metadata:
   languageName: node
   linkType: soft
 
+"@aztec/ipc-runtime@portal:../../ipc-runtime/ts::locator=%40aztec%2Fbb.js%40portal%3A..%2F..%2Fts%3A%3Alocator%3Dbbjs-test%2540workspace%253Abbjs-test":
+  version: 0.0.0-use.local
+  resolution: "@aztec/ipc-runtime@portal:../../ipc-runtime/ts::locator=%40aztec%2Fbb.js%40portal%3A..%2F..%2Fts%3A%3Alocator%3Dbbjs-test%2540workspace%253Abbjs-test"
+  languageName: node
+  linkType: soft
+
+"@aztec/ipc-runtime@portal:../../ipc-runtime/ts::locator=%40aztec%2Fbb.js%40portal%3A..%2F..%2Fts%3A%3Alocator%3Dbrowser-test-app%2540workspace%253Abrowser-test-app":
+  version: 0.0.0-use.local
+  resolution: "@aztec/ipc-runtime@portal:../../ipc-runtime/ts::locator=%40aztec%2Fbb.js%40portal%3A..%2F..%2Fts%3A%3Alocator%3Dbrowser-test-app%2540workspace%253Abrowser-test-app"
+  languageName: node
+  linkType: soft
+
 "@babel/code-frame@npm:^7.0.0":
   version: 7.26.2
   resolution: "@babel/code-frame@npm:7.26.2"

barretenberg/cpp/src/barretenberg/bbapi/c_bind.cpp

@@ -17,12 +17,15 @@ BBApiRequest global_request;
 
 } // namespace bb::bbapi
 
-// WASM-exported bbapi entry point. Takes msgpack-encoded `[ [name, payload] ]`
+// WASM-exported FFI entry point. Takes msgpack-encoded `[ [name, payload] ]`
 // (tuple-wrapped command in NamedUnion shape), returns msgpack-encoded
 // `[name, payload]` (response in NamedUnion shape). The codegen-emitted
 // dispatcher owns the command-name → handle_<method> table and runs the
 // per-call deserialize / serialize / exception → ErrorResponse plumbing.
-WASM_EXPORT void bbapi(const uint8_t* input_in, size_t input_len_in, uint8_t** output_out, size_t* output_len_out)
+WASM_EXPORT void ipc_ffi_entry(const uint8_t* input_in,
+                               size_t input_len_in,
+                               uint8_t** output_out,
+                               size_t* output_len_out)
 {
     auto handler = bb::bbapi::make_bb_handler(bb::bbapi::global_request);
     std::vector<uint8_t> input(input_in, input_in + input_len_in);

barretenberg/cpp/src/barretenberg/bbapi/c_bind.hpp

@@ -2,7 +2,7 @@
 #include "barretenberg/serialize/cbind_fwd.hpp"
 #include <vector>
 
-// WASM-exported bbapi entry point. Takes msgpack `[ [name, payload] ]`,
+// WASM-exported FFI entry point. Takes msgpack `[ [name, payload] ]`,
 // returns msgpack `[name, payload]`. See c_bind.cpp for the implementation
 // (calls the codegen-emitted `make_bb_handler` dispatcher).
-CBIND_DECL(bbapi)
+CBIND_DECL(ipc_ffi_entry)

barretenberg/rust/Cargo.toml

@@ -17,17 +17,12 @@ rmp-serde = "1.1"
 rmpv = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 
-# Async runtime
-tokio = { version = "1.35", features = ["full"] }
-
 # IPC and system
 libc = "0.2"
-nix = { version = "0.27", features = ["socket", "uio"] }
 
 # Testing
 criterion = "0.5"
 
 # Utilities
 thiserror = "1.0"
-tracing = "0.1"
 hex = "0.4"

barretenberg/rust/barretenberg-rs/Cargo.toml

@@ -21,21 +21,17 @@ rmp-serde.workspace = true
 rmpv.workspace = true
 serde.workspace = true
 
-# Async runtime
-tokio = { workspace = true, optional = true }
-
 # IPC and system
 libc.workspace = true
-nix = { workspace = true, optional = true }
+
+# UDS / MPSC-SHM transport for the codegen-generated Backend bridge.
+ipc-runtime = { path = "../../../ipc-runtime/rust" }
 
 # Utilities
 thiserror.workspace = true
-tracing = { workspace = true, optional = true }
 hex.workspace = true
 
 [features]
-default = ["native", "ffi"]
-native = ["tokio", "nix", "tracing"]
-async = ["tokio"]
+default = ["ffi"]
 # FFI backend - links against libbarretenberg from cpp build
 ffi = []