chore!: modify getTreeKeyHash to use hashCommitment (#31)

* postfix wasm

* make fail

* make pass again

* update rust-verkle dep to 7688f0aedfb147d3d391abfe8495e46c46d72ce0

* modify rust code to match new API

* modify ts code to match new rust API

* change getTreeKeyHash to use `hashCommitment`

* Update package-lock

---------

Co-authored-by: Holger Drewes <Holger.Drewes@gmail.com>
Co-authored-by: acolytec3 <17355484+acolytec3@users.noreply.github.com>

src.rs/Cargo.toml

@@ -15,11 +15,11 @@ default = ["console_error_panic_hook"]
 serde = { version = "1.0", features = ["derive"] }
 serde-wasm-bindgen = "0.3.0"
 wasm-bindgen = { version = "0.2.90", features = ["serde-serialize"] }
-verkle-trie = { git = "https://github.com/crate-crypto/rust-verkle", rev = "6036bde9a8f416648213c59ad0c857b2a6f226f3" }
-verkle-spec = { git = "https://github.com/crate-crypto/rust-verkle", rev = "6036bde9a8f416648213c59ad0c857b2a6f226f3" }
-ipa-multipoint = { git = "https://github.com/crate-crypto/rust-verkle", rev = "6036bde9a8f416648213c59ad0c857b2a6f226f3" }
-banderwagon = { git = "https://github.com/crate-crypto/rust-verkle", rev = "6036bde9a8f416648213c59ad0c857b2a6f226f3" }
-ffi_interface = { git = "https://github.com/crate-crypto/rust-verkle", rev = "6036bde9a8f416648213c59ad0c857b2a6f226f3" }
+verkle-trie = { git = "https://github.com/crate-crypto/rust-verkle", rev = "7688f0aedfb147d3d391abfe8495e46c46d72ce0" }
+verkle-spec = { git = "https://github.com/crate-crypto/rust-verkle", rev = "7688f0aedfb147d3d391abfe8495e46c46d72ce0" }
+ipa-multipoint = { git = "https://github.com/crate-crypto/rust-verkle", rev = "7688f0aedfb147d3d391abfe8495e46c46d72ce0" }
+banderwagon = { git = "https://github.com/crate-crypto/rust-verkle", rev = "7688f0aedfb147d3d391abfe8495e46c46d72ce0" }
+ffi_interface = { git = "https://github.com/crate-crypto/rust-verkle", rev = "7688f0aedfb147d3d391abfe8495e46c46d72ce0" }
 ark-ff = "0.4.0"
 ark-serialize = { version = "^0.4.0", default-features = false }
 

src.rs/src/verkle_ffi_api.rs

@@ -34,8 +34,7 @@ impl Context {
         let address = js_value_to_bytes::<32>(address.into())?;
         let tree_index_le = js_value_to_bytes::<32>(tree_index_le.into())?;
 
-        let key =
-            ffi_interface::get_tree_key(&self.inner.committer, address, tree_index_le, sub_index);
+        let key = ffi_interface::get_tree_key(&self.inner, address, tree_index_le, sub_index);
 
         Ok(bytes_to_js_value(key).into())
     }
@@ -49,7 +48,7 @@ impl Context {
             scalars.extend(js_value_to_bytes::<32>(scalar.into())?);
         }
 
-        let commitment = ffi_interface::commit_to_scalars(&self.inner.committer, &scalars)
+        let commitment = ffi_interface::commit_to_scalars(&self.inner, &scalars)
             .map_err(|err| JsError::new(&format!("could not commit to scalars: {:?}", err)))?;
 
         Ok(bytes_to_js_value(commitment).into())
@@ -75,7 +74,7 @@ impl Context {
             scalars.extend([0u8; 16]);
         }
 
-        let commitment = ffi_interface::commit_to_scalars(&self.inner.committer, &scalars)
+        let commitment = ffi_interface::commit_to_scalars(&self.inner, &scalars)
             .map_err(|err| JsError::new(&format!("could not commit to scalars: {:?}", err)))?;
 
         Ok(bytes_to_js_value(commitment).into())
@@ -122,13 +121,17 @@ impl Context {
     ///
     /// This method does not return a scalar value, it returns 32 bytes.
     ///
-    /// Note: We plan to deprecate this method from the public API in favour of using hash commitment
-    /// This method will only be used internally once that is done.
-    #[wasm_bindgen(js_name = "deprecateSerializeCommitment")]
+    /// Note: This method is used to serialize the root node before placing it inside
+    /// of the block header.
+    /// The reason we use this method instead of `hashCommitment` is because
+    /// we want to be able to deserialize a commitment from the block header.
+    ///
+    /// This is not possible with `hashCommitment` as it is a one way function.
+    #[wasm_bindgen(js_name = "serializeCommitment")]
     pub fn serialize_commitment(&self, commitment: Uint8Array) -> Result<Uint8Array, JsError> {
         let commitment = js_value_to_bytes::<64>(commitment.into())?;
 
-        let hash = ffi_interface::deprecated_serialize_commitment(commitment);
+        let hash = ffi_interface::serialize_commitment(commitment);
 
         Ok(bytes_to_js_value(hash).into())
     }
@@ -158,7 +161,7 @@ impl Context {
         let new_scalar_value = js_value_to_bytes::<32>(new_scalar_value.into())?;
 
         let updated_commitment = ffi_interface::update_commitment(
-            &self.inner.committer,
+            &self.inner,
             commitment,
             commitment_index,
             old_scalar_value,

src.ts/tests/ffi.spec.ts

@@ -33,7 +33,7 @@ describe('bindings', () => {
     const key = ffi.getTreeKey(address, treeIndexLE, subIndex)
     const keyHex = bytesToHex(key)
 
-    const expected = '0x76a014d14e338c57342cda5187775c6b75e7f0ef292e81b176c7a5a700273700'
+    const expected = '0xff7e3916badeb510dfcdad458726273319280742e553d8d229bd676428147300'
 
     expect(keyHex).toBe(expected)
   })
@@ -55,7 +55,7 @@ describe('bindings', () => {
     const hash = verkleCrypto.getTreeKeyHash(address, treeIndexLE)
     const hashHex = bytesToHex(hash)
 
-    const expected = '0x76a014d14e338c57342cda5187775c6b75e7f0ef292e81b176c7a5a70027373a'
+    const expected = '0xff7e3916badeb510dfcdad458726273319280742e553d8d229bd676428147303'
 
     expect(hashHex).toBe(expected)
   })
@@ -144,7 +144,7 @@ describe('bindings', () => {
     ])
     const commitment = ffi.commitToScalars([scalar])
 
-    const commitmentHash = ffi.deprecateSerializeCommitment(commitment)
+    const commitmentHash = ffi.serializeCommitment(commitment)
     const commitmentHashHex = bytesToHex(commitmentHash)
 
     const expected = '0x6d40cf3d3097cb19b0ff686a068d53fb1250cc98bbd33766cf2cce00acb8b0a6'

src.ts/verkleFFIBindings/verkleFFI.ts

@@ -90,19 +90,9 @@ export function getTreeKeyHash(
   }
 
   // Commit to the chunks and compute a 32 byte value that we will denote as the hash
-  //
-  // Note: This 32 byte value is not a Scalar. It is just a 32 byte value.
-  //
-  // Note: that the .reverse() below is an implementation detail of the underlying
-  // Note: serialization code returning big endian.
-  //
-  // TODO: We want to eventually replace deprecateSerializeCommitment with `hashCommitment`
-  // TODO: This is a breaking change, so requires more coordination between different implementations
-  // TODO: once that is done, we can remove the .reverse and the deprecateSerializeCommitment method.
-  //
   const commitment = verkleFFI.commitTo16ByteScalars(chunks)
-  const serializedCommitment = verkleFFI.deprecateSerializeCommitment(commitment).reverse()
-  return serializedCommitment
+  const hash = verkleFFI.hashCommitment(commitment)
+  return hash
 }
 
 function concatenateUint8Arrays(array1: Uint8Array, array2: Uint8Array): Uint8Array {