Make base64 encoding target independent in KeyIdMemStore in wasm bi…

…ndings (iotaledger#1386)

bindings/wasm/lib/key_id_storage.ts

@@ -1,3 +1,4 @@
+import { encode as base64Encode } from "base64-arraybuffer";
 import type { KeyIdStorage, MethodDigest } from "~identity_wasm";
 
 export class KeyIdMemStore implements KeyIdStorage {
@@ -48,6 +49,5 @@ export class KeyIdMemStore implements KeyIdStorage {
  */
 function methodDigestToString(methodDigest: MethodDigest): string {
     let arrayBuffer = methodDigest.pack().buffer;
-    let buffer = Buffer.from(arrayBuffer);
-    return buffer.toString("base64");
+    return base64Encode(arrayBuffer);
 }

bindings/wasm/package.json

@@ -75,6 +75,7 @@
   "dependencies": {
     "@noble/ed25519": "^1.7.3",
     "@types/node-fetch": "^2.6.2",
+    "base64-arraybuffer": "^1.0.2",
     "node-fetch": "^2.6.7"
   },
   "peerDependencies": {

identity_storage/src/key_id_storage/key_id_storage_error.rs

@@ -52,7 +52,7 @@ impl KeyIdStorageErrorKind {
       Self::KeyIdNotFound => "key id not found in storage",
       Self::Unavailable => "key id storage unavailable",
       Self::Unauthenticated => "authentication with the key id storage failed",
-      Self::Unspecified => "key storage operation failed",
+      Self::Unspecified => "key id storage operation failed",
       Self::RetryableIOFailure => "key id storage was unsuccessful because of an I/O failure",
       Self::SerializationError => "(de)serialization error",
     }

identity_storage/src/storage/error.rs

@@ -13,7 +13,7 @@ pub enum JwkStorageDocumentError {
   #[error("storage operation failed: key storage error")]
   KeyStorageError(KeyStorageError),
   /// Caused by a failure in the key id storage.
-  #[error("storage operation failed: key id storage error")]
+  #[error("storage operation failed: key id storage error: {0}")]
   KeyIdStorageError(KeyIdStorageError),
   /// Caused by an attempt to add a method with a fragment that already exists.
   #[error("could not add method: the fragment already exists")]