diff --git a/Cargo.toml b/Cargo.toml
index 5a9bd08..46071e8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,5 +23,5 @@ serde = { version = "1.0.145", features = ["derive"]}
 serde_json = "1.0.85"
 shamir_secret_sharing = "0.1.1"
 tiny-keccak = "1.5"
-web3 = { version = "0.18.0", features = ["signing"] }
+web3 = { version = "0.18.0"}
 
diff --git a/rustwallet.h b/rustwallet.h
new file mode 100644
index 0000000..448c162
--- /dev/null
+++ b/rustwallet.h
@@ -0,0 +1,22 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct CWallet {
+  char *public_key;
+  char *private_key;
+  char *public_addr;
+} CWallet;
+
+struct CWallet generate_cwallet(void);
+
+void free_cwallet(struct CWallet cw);
+
+void save_wallet(const struct CWallet *cw);
+
+struct CWallet fetch_cwallet(void);
+
+void sign(void);
+
+void sss_sign(const char *msg);
diff --git a/scripts/ios_build.sh b/scripts/ios_build.sh
index 25cc3b0..973dcd4 100755
--- a/scripts/ios_build.sh
+++ b/scripts/ios_build.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 # building
-cbindgen src/lib.rs -l c > rustywallet.h
+cbindgen src/lib.rs -l c > rustwallet.h
 cargo lipo --release
 
 # moving files to the ios project
diff --git a/src/wallet/wallet_impl.rs b/src/wallet/wallet_impl.rs
index d3937f4..0f74478 100644
--- a/src/wallet/wallet_impl.rs
+++ b/src/wallet/wallet_impl.rs
@@ -125,23 +125,6 @@ impl Wallet {
         let pk = SecretKey::from_str(&self.secret_key).expect("32 bytes, within curve order");
         // println!("secret key: {:?}", pk);
 
-        // let key = SecretKeyRef::new(&pk);
-        // let signature = key
-        //     .sign(message_hash.as_bytes(), None)
-        //     .expect("hash is non-zero 32-bytes; qed");
-        // let v = signature
-        //     .v
-        //     .try_into()
-        //     .expect("signature recovery in electrum notation always fits in a u8");
-
-        // let mut bytes = Vec::with_capacity(65);
-        // bytes.extend_from_slice(signature.r.as_bytes());
-        // bytes.extend_from_slice(signature.s.as_bytes());
-        // bytes.push(v);
-
-        // let str_sign = hex::encode(bytes);
-        // println!("web3 sign: {:?}", str_sign);
-
         let message_to_hash = Message::from_slice(message_hash.as_ref()).unwrap();
         let (recovery_id, signature) = secp
             .sign_ecdsa_recoverable(&message_to_hash, &pk)