refactor: small changes and add headers

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "permissionless-arbitration/contracts/lib/forge-std"]
 	path = permissionless-arbitration/contracts/lib/forge-std
 	url = https://github.com/foundry-rs/forge-std
+[submodule "machine-bindings/cartesi-machine-sys/machine-emulator"]
+	path = machine-bindings/cartesi-machine-sys/machine-emulator
+	url = https://github.com/cartesi/machine-emulator.git

machine-bindings/cartesi-machine-sys/Cargo.toml

@@ -6,3 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+
+
+[build-dependencies]
+bindgen = "0.65.1"

machine-bindings/cartesi-machine-sys/README.md

@@ -1,3 +1,4 @@
 # cartesi-machine-sys
 
-This crate offers native bindings for the [cartesi emulator](https://github.com/cartesi/machine-emulator), enabling local manipulation of a Cartesi machine.
+This crate offers native bindings for the [cartesi emulator](https://github.com/cartesi/machine-emulator), enabling local manipulation of a Cartesi machine.
+

machine-bindings/cartesi-machine-sys/build.rs

@@ -1,3 +1,15 @@
+use std::{env, path::PathBuf};
+
 fn main() {
     println!("cargo:rustc-link-lib=cartesi");
+
+    let bindings = bindgen::Builder::default()
+        .header("src/headers/machine-c-api.h")
+        .generate()
+        .expect("Unable to generate bindings");
+
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
 }