Add create commit

crates/sp_client/src/api.rs

@@ -574,3 +574,11 @@ pub fn try_decrypt_with_key(
     let plain = String::from_utf8(aes_dec.decrypt_with_key()?)?;
     Ok(plain)
 }
+
+#[wasm_bindgen]
+pub fn create_commitment(payload_to_hash: String) -> String{
+     let mut engine = sha256::HashEngine::default();
+     engine.write_all(&payload_to_hash.as_bytes());
+     let hash = sha256::Hash::from_engine(engine);
+     String::from_utf8_lossy(hash.to_bytes())
+}