Add hash mod

src/hash.rs

@@ -0,0 +1,20 @@
+use sp_client::bitcoin::{
+        consensus::{serialize, Encodable}, hashes::{sha256t_hash_newtype, Hash, HashEngine}, OutPoint
+    };
+
+sha256t_hash_newtype! {
+    pub struct AnkPcdTag = hash_str("4nk/Pcd");
+
+    #[hash_newtype(forward)]
+    pub struct AnkPcdHash(_);
+}
+
+impl AnkPcdHash {
+    pub fn from_pcd_value(value: &[u8], label: &[u8], outpoint: &OutPoint) -> Self {
+        let mut eng = AnkPcdHash::engine();
+        eng.input(value);
+        eng.input(label);
+        serialize(outpoint).consensus_encode(&mut eng).expect("hash engine don't return errors");
+        AnkPcdHash::from_engine(eng)
+    }
+}

src/lib.rs

@@ -16,6 +16,7 @@ pub use wasm_bindgen;
 
 pub mod crypto;
 pub mod device;
+pub mod hash;
 pub mod error;
 pub mod network;
 pub mod pcd;