Doc commit tag conventions

packages/stack/src/wallet/wallet-p2pkh.ts

@@ -22,6 +22,7 @@ import {
 import {
   type Input,
   binToHex,
+  hash256,
   sha256,
   utf8ToBin,
   walletTemplateP2pkhNonHd,
@@ -54,19 +55,6 @@ export class WalletP2PKH extends BaseWallet<WalletP2PKHEvents> {
   public isStarted = false;
   public status: string | null = null;
 
-  constructor(
-    // Dependencies.
-    public blockchain: BaseBlockchain,
-    // Persistent Storage.
-    public store: BaseStore,
-    // Cache.
-    public cache: BaseStore,
-    // Properties.
-    public privateKey: PrivateKey,
-  ) {
-    super();
-  }
-
   static async from<T extends typeof WalletP2PKH>(
     this: T,
     services: WalletServices,
@@ -170,10 +158,40 @@ export class WalletP2PKH extends BaseWallet<WalletP2PKHEvents> {
     });
   }
 
-  async getId() {
-    const genesisData = await this.store.getOrFail('genesis');
+  constructor(
+    // Dependencies.
+    public blockchain: BaseBlockchain,
+    // Persistent Storage.
+    public store: BaseStore,
+    // Cache.
+    public cache: BaseStore,
+    // Properties.
+    public privateKey: PrivateKey,
+  ) {
+    super();
+  }
 
-    return sha256.hash(utf8ToBin(JSON.stringify(genesisData)));
+  async getId() {
+    // NOTE: Use the cache to optimize future calls.
+    return binToHex(
+      await this.cache.getOrSet('walletId', async () =>
+        this.deriveKey('walletId'),
+      ),
+    );
+  }
+
+  async getEncryptionKey() {
+    // NOTE: Use the cache to optimize future calls.
+    return await this.cache.getOrSet('encryptionKey', async () =>
+      this.deriveKey('encryptionKey'),
+    );
+  }
+
+  async getSigningKey() {
+    // NOTE: Use the cache to optimize future calls.
+    return this.cache.getOrSet('signingKey', async () =>
+      this.deriveKey('signingKey'),
+    );
   }
 
   async start() {
@@ -431,6 +449,19 @@ export class WalletP2PKH extends BaseWallet<WalletP2PKHEvents> {
     // Store the data.
     await this.store.set<T>(activityId, activity);
   }
+
+  private async deriveKey(keyName: string): Promise<Uint8Array> {
+    // Get the genesis data for this wallet.
+    // TODO: This needs to change!
+    const genesisData = await this.store.getOrFail('genesis');
+
+    // Hash the genesis data using Hash256 and the key ("WalletID") for this derivation using Hash256.
+    const genesisDataHashed = hash256(utf8ToBin(JSON.stringify(genesisData)));
+    const keyHashed = hash256(utf8ToBin(keyName));
+
+    // Combine the hashes and do one final hash for good measure.
+    return hash256(new Uint8Array([...genesisDataHashed, ...keyHashed]));
+  }
 }
 
 //-----------------------------------------------------------------------------