Resolve "WIP: UTXO Selection and Storage"

packages/stack/src/utils/memoizer.ts

@@ -0,0 +1,55 @@
+// TODO: We may want to move this to @xocash/primitives.
+
+export class Memoizer {
+  private cache = new Map<string, any>();
+
+  /**
+   * Gets a cached value for the given key, computing it if it doesn't exist.
+   *
+   * @param key - The key to look up or store the value under
+   * @param compute - Function to compute the value if it's not cached
+   * @returns The cached or computed value
+   */
+  get<K extends string, V>(key: K, compute: () => V): V {
+    if (!this.cache.has(key)) {
+      this.cache.set(key, compute());
+    }
+    return this.cache.get(key) as V;
+  }
+
+  /**
+   * Checks if a value exists for the given key.
+   *
+   * @param key - The key to check
+   * @returns Whether the key exists in the cache
+   */
+  has(key: string): boolean {
+    return this.cache.has(key);
+  }
+
+  /**
+   * Deletes a cached value.
+   *
+   * @param key - The key to delete
+   * @returns Whether a value was deleted
+   */
+  delete(key: string): boolean {
+    return this.cache.delete(key);
+  }
+
+  /**
+   * Clears all cached values.
+   */
+  clear(): void {
+    this.cache.clear();
+  }
+
+  /**
+   * Gets all cached keys.
+   *
+   * @returns Array of cached keys
+   */
+  keys(): string[] {
+    return Array.from(this.cache.keys());
+  }
+}