feat(truapi-server): add host logic primitives

Cargo.toml

@@ -1,7 +1,6 @@
 [workspace]
 resolver = "2"
 members = ["rust/crates/*"]
-exclude = ["rust/crates/truapi-server"]
 
 [workspace.package]
 edition = "2024"

deny.toml

@@ -5,6 +5,9 @@
 allow = [
     "MIT",
     "Apache-2.0",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "CC0-1.0",
     "Unicode-3.0",
     "Unlicense",
     "Zlib",

rust/crates/truapi-server/Cargo.toml

@@ -0,0 +1,66 @@
+[package]
+name = "truapi-server"
+version = "0.1.0"
+edition.workspace = true
+description = "TrUAPI server runtime: dispatcher, frames, SCALE, streams"
+license = "MIT"
+
+[lib]
+crate-type = ["rlib", "cdylib"]
+
+[features]
+default = []
+
+[dependencies]
+truapi = { path = "../truapi" }
+truapi-platform = { path = "../truapi-platform" }
+async-trait = "0.1"
+derive_more = { version = "2", features = ["display"] }
+futures = "0.3"
+futures-timer = { version = "3", features = ["wasm-bindgen"] }
+parity-scale-codec = { version = "3", features = ["derive"] }
+primitive-types = { version = "0.13", default-features = false, features = ["serde"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+thiserror = "1"
+unicode-normalization = "0.1"
+url = "2"
+hex = "0.4"
+blake2-rfc = { version = "0.2", default-features = false }
+sp-crypto-hashing = { version = "0.1", default-features = false }
+bs58 = { version = "0.5", default-features = false, features = ["alloc"] }
+schnorrkel = { version = "0.11.5", default-features = false, features = ["alloc", "getrandom"] }
+getrandom = { version = "0.2", features = ["js"] }
+p256 = { version = "0.13", default-features = false, features = ["ecdh"] }
+hkdf = "0.12"
+sha2 = "0.10"
+aes-gcm = { version = "0.10", default-features = false, features = ["aes", "alloc"] }
+tracing = "0.1"
+# `registry` + `std` only: pulls the Registry + per-layer filter/reload, but
+# not `env-filter` (which drags in `regex`, heavy on wasm).
+tracing-subscriber = { version = "0.3", default-features = false, features = ["registry", "std"] }
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+subxt-rpcs = { version = "0.50.1", default-features = false, features = ["native"] }
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+js-sys = "0.3"
+subxt-rpcs = { version = "0.50.1", default-features = false, features = ["web"] }
+wasm-bindgen = "0.2.118"
+wasm-bindgen-futures = "0.4"
+console_error_panic_hook = "0.1"
+futures-util = "0.3"
+pin-project = "1"
+send_wrapper = { version = "0.6", features = ["futures"] }
+web-time = "1"
+web-sys = { version = "0.3", features = [
+    "BinaryType",
+    "CloseEvent",
+    "console",
+    "Event",
+    "MessageEvent",
+    "WebSocket",
+] }
+
+[target.'cfg(target_arch = "wasm32")'.dev-dependencies]
+wasm-bindgen-test = "0.3"

rust/crates/truapi-server/README.md

@@ -0,0 +1,33 @@
+# truapi-server
+
+_Runtime core for TrUAPI: dispatcher, protocol frames, SCALE-coded wire envelope._
+
+## What this crate is for
+
+`truapi-server` is the runtime that turns trait implementations of the
+`truapi` API into a working host. It owns:
+
+- the [`ProtocolMessage`] wire envelope and SCALE codec
+- the [`Dispatcher`] that routes incoming frames to per-method handlers
+- the subscription lifecycle (start/receive/stop/interrupt)
+- the [`Transport`] trait that platform-specific IPC backends implement
+- the auto-generated dispatcher/wire-table tables shipped under
+  [`crate::generated`]
+
+## Wire envelope
+
+Every frame on the wire is encoded as:
+
+```text
+[requestId: SCALE str][discriminant: u8][payload bytes...]
+```
+
+The discriminant identifies a method + frame kind via the auto-generated
+[`crate::generated::wire_table::WIRE_TABLE`]. Each method's ids are exposed
+as a named const (`PREIMAGE_SUBMIT`, ...); both `WIRE_TABLE` and the generated
+dispatcher reference those consts. Method ordering is part of the wire
+protocol; only ever append.
+
+The payload bytes are the SCALE-encoded inner value, inlined without a
+length prefix. The discriminant is carried directly as `Payload::id`, and the
+dispatcher routes on that numeric id via id-keyed tables.

rust/crates/truapi-server/src/host_logic.rs

@@ -0,0 +1,16 @@
+//! Host-agnostic logic the Rust core owns on behalf of every platform host.
+//!
+//! Platform callbacks are a syscall layer for OS primitives (modals, native
+//! storage, URL handler, notification center). Everything else lives here so
+//! iOS, Android, and web hosts share one canonical implementation.
+
+pub mod dotns;
+pub mod entropy;
+pub mod features;
+pub mod identity;
+pub mod permissions;
+pub mod product_account;
+pub mod session;
+pub mod session_store;
+pub mod sso;
+pub mod statement_store;