fix: use header file to define platform-wallet-ffi public ABI and force swift-sdk to use it

packages/rs-platform-wallet-ffi/Cargo.toml

@@ -47,6 +47,9 @@ zeroize = { version = "1", features = ["derive"] }
 tempfile = "3.8"
 dpp = { path = "../rs-dpp", features = ["fixtures-and-mocks"] }
 
+[build-dependencies]
+cbindgen = "0.27"
+
 [features]
 default = []
 mocks = []

packages/rs-platform-wallet-ffi/build.rs

@@ -0,0 +1,32 @@
+use std::path::Path;
+use std::{env, fs};
+
+fn main() {
+    let crate_name = env::var("CARGO_PKG_NAME").unwrap();
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    let out_dir = env::var("OUT_DIR").unwrap();
+
+    println!("cargo:rerun-if-changed=cbindgen.toml");
+    println!("cargo:rerun-if-changed=src/");
+
+    let target_dir = Path::new(&out_dir)
+        .ancestors()
+        .nth(3) // This line moves up to the target/<PROFILE> directory
+        .expect("Failed to find target dir");
+
+    let include_dir = target_dir.join("include").join(&crate_name);
+
+    fs::create_dir_all(&include_dir).unwrap();
+
+    let output_path = include_dir.join(format!("{}.h", &crate_name));
+
+    let config_path = Path::new(&crate_dir).join("cbindgen.toml");
+    let config = cbindgen::Config::from_file(&config_path).expect("Failed to read cbindgen.toml");
+
+    cbindgen::Builder::new()
+        .with_crate(&crate_dir)
+        .with_config(config)
+        .generate()
+        .expect("Unable to generate bindings")
+        .write_to_file(&output_path);
+}

packages/rs-platform-wallet-ffi/cbindgen.toml

@@ -1,78 +1,25 @@
-# cbindgen configuration for Platform Wallet FFI
-
 language = "C"
 pragma_once = true
 include_guard = "PLATFORM_WALLET_FFI_H"
 autogen_warning = "/* This file is auto-generated. Do not modify manually. */"
 include_version = true
-namespaces = []
-using_namespaces = []
 sys_includes = ["stdint.h", "stdbool.h"]
-includes = []
 no_includes = false
 cpp_compat = true
 documentation = true
 documentation_style = "c99"
 
-# Forward-declare external Rust types referenced opaquely in this
-# crate's FFI signatures. cbindgen cannot introspect external crates,
-# so without this injection the generated header references `Sdk *`
-# with no type declaration, causing the Swift build to fail with
-# `unknown type name 'Sdk'`. The build_ios.sh post-processor expands
-# these forward declarations into `typedef struct X { uint8_t _opaque; } X;`.
-after_includes = """
-typedef struct Sdk Sdk;
-"""
-
-[defines]
-
-[export]
-include = ["platform_wallet_*", "identity_manager_*", "managed_identity_*", "contact_request_*", "established_contact_*"]
-exclude = []
-prefix = ""
-item_types = ["enums", "structs", "unions", "typedefs", "opaque", "functions"]
-
-[export.rename]
-"Handle" = "platform_wallet_handle_t"
-"PlatformWalletFFIError" = "platform_wallet_error_t"
-"PlatformWalletFFIResult" = "platform_wallet_result_t"
-
 [fn]
 args = "horizontal"
 rename_args = "snake_case"
 must_use = "PLATFORM_WALLET_WARN_UNUSED_RESULT"
-prefix = ""
-postfix = ""
-
-[struct]
-rename_fields = "snake_case"
-derive_constructor = false
-derive_eq = false
-derive_neq = false
-derive_lt = false
-derive_lte = false
-derive_gt = false
-derive_gte = false
 
 [enum]
 rename_variants = "ScreamingSnakeCase"
-add_sentinel = false
 prefix_with_name = true
-derive_helper_methods = false
-derive_const_casts = false
-derive_mut_casts = false
-cast_assert_name = "assert"
 must_use = "PLATFORM_WALLET_WARN_UNUSED_RESULT"
 
 [const]
 allow_static_const = true
 allow_constexpr = false
 sort_by = "name"
-
-[macro_expansion]
-bitflags = false
-
-[parse]
-parse_deps = false
-include = []
-exclude = []