diff --git a/contracts/access_control/admin.rs b/contracts/access_control/admin.rs
new file mode 100644
index 0000000..c2a9c76
--- /dev/null
+++ b/contracts/access_control/admin.rs
@@ -0,0 +1,24 @@
+use soroban_sdk::{Env, Address};
+use super::storage::get_admin;
+
+/// 🔒 Require admin authentication
+pub fn require_admin(env: &Env) -> Address {
+    let admin = get_admin(env);
+
+    // Enforce authentication
+    admin.require_auth();
+
+    admin
+}
+
+/// 🔄 Optional: transfer admin ownership
+pub fn transfer_admin(env: &Env, new_admin: Address) {
+    let current_admin = require_admin(env);
+
+    // Prevent accidental self-transfer (optional safety)
+    if current_admin == new_admin {
+        panic!("New admin must be different");
+    }
+
+    super::storage::set_admin(env, &new_admin);
+}
\ No newline at end of file
diff --git a/contracts/access_control/mod.rs b/contracts/access_control/mod.rs
new file mode 100644
index 0000000..ac83d30
--- /dev/null
+++ b/contracts/access_control/mod.rs
@@ -0,0 +1,6 @@
+pub mod admin;
+pub mod storage;
+
+// Re-export for easy use
+pub use admin::{require_admin, transfer_admin};
+pub use storage::{set_admin, get_admin};
\ No newline at end of file
diff --git a/contracts/access_control/storage.rs b/contracts/access_control/storage.rs
new file mode 100644
index 0000000..cb2003f
--- /dev/null
+++ b/contracts/access_control/storage.rs
@@ -0,0 +1,14 @@
+use soroban_sdk::{Env, Address, Symbol};
+
+const ADMIN_KEY: Symbol = Symbol::short("ADMIN");
+
+pub fn set_admin(env: &Env, admin: &Address) {
+    env.storage().instance().set(&ADMIN_KEY, admin);
+}
+
+pub fn get_admin(env: &Env) -> Address {
+    env.storage()
+        .instance()
+        .get(&ADMIN_KEY)
+        .expect("Admin not initialized")
+}
\ No newline at end of file
diff --git a/contracts/benchmark/mod.rs b/contracts/benchmark/mod.rs
new file mode 100644
index 0000000..2ffb1e2
--- /dev/null
+++ b/contracts/benchmark/mod.rs
@@ -0,0 +1,15 @@
+pub mod profiler;
+
+pub use profiler::{GasProfile};
+use soroban_sdk::Env;
+
+/// Measure gas/footprint for a closure
+pub fn profile<F>(env: &Env, f: F) -> GasProfile
+where
+    F: FnOnce(),
+{
+    let start = GasProfile::new(env);
+    f();
+    let end = GasProfile::new(env);
+    start.delta(&end)
+}
\ No newline at end of file
diff --git a/contracts/benchmark/profiler.rs b/contracts/benchmark/profiler.rs
new file mode 100644
index 0000000..e20b04d
--- /dev/null
+++ b/contracts/benchmark/profiler.rs
@@ -0,0 +1,21 @@
+use soroban_sdk::{Env, BytesN};
+
+pub struct GasProfile {
+    pub cpu_insns: u64,
+    pub mem_bytes: u64,
+}
+
+impl GasProfile {
+    pub fn new(env: &Env) -> Self {
+        let cpu_insns = env.budget().cpu_insns();
+        let mem_bytes = env.budget().mem_bytes();
+        Self { cpu_insns, mem_bytes }
+    }
+
+    pub fn delta(&self, after: &GasProfile) -> GasProfile {
+        GasProfile {
+            cpu_insns: after.cpu_insns - self.cpu_insns,
+            mem_bytes: after.mem_bytes - self.mem_bytes,
+        }
+    }
+}
\ No newline at end of file