Remove DittoWallet module

src/DittoWallet.ts

@@ -1,46 +0,0 @@
-import { HDKey } from '@scure/bip32';
-
-import { Conf } from '@/config.ts';
-
-/**
- * HD wallet based on the `DITTO_NSEC`.
- * The wallet is used to derive keys for various purposes.
- * It is a singleton with static methods, and the keys are cached.
- */
-export class DittoWallet {
-  static #root = HDKey.fromMasterSeed(Conf.seckey);
-  static #keys = new Map<string, HDKey>();
-
-  /** Derive the key cached. */
-  static derive(path: string): HDKey {
-    const existing = this.#keys.get(path);
-    if (existing) {
-      return existing;
-    } else {
-      const key = this.#root.derive(path);
-      this.#keys.set(path, key);
-      return key;
-    }
-  }
-
-  /** Derive the key and return the bytes. */
-  static deriveKey(path: string): Uint8Array {
-    const { privateKey } = this.derive(path);
-
-    if (!privateKey) {
-      throw new Error('Private key not available');
-    }
-
-    return privateKey;
-  }
-
-  /** Database encryption key for AES-GCM encryption of database columns. */
-  static get dbKey(): Uint8Array {
-    return this.deriveKey(Conf.wallet.dbKeyPath);
-  }
-
-  /** VAPID secret key, used for web push notifications. ES256. */
-  static get vapidKey(): Uint8Array {
-    return this.deriveKey(Conf.wallet.vapidKeyPath);
-  }
-}

src/config.ts

@@ -103,21 +103,6 @@ class Conf {
   static get captchaTTL(): number {
     return Number(Deno.env.get('CAPTCHA_TTL') || 5 * 60 * 1000);
   }
-  /**
-   * BIP-32 derivation paths for different crypto use-cases.
-   * The `DITTO_NSEC` is used as the seed.
-   * Keys can be rotated by changing the derviation path.
-   */
-  static wallet = {
-    /** Private key for AES-GCM encryption in the Postgres database. */
-    get dbKeyPath(): string {
-      return Deno.env.get('WALLET_DB_KEY_PATH') || "m/0'/1'";
-    },
-    /** VAPID private key path. */
-    get vapidKeyPath(): string {
-      return Deno.env.get('WALLET_VAPID_KEY_PATH') || "m/0'/3'";
-    },
-  };
   /** Character limit to enforce for posts made through Mastodon API. */
   static get postCharLimit(): number {
     return Number(Deno.env.get('POST_CHAR_LIMIT') || 5000);