wallet: --preload-all option to load all wallet on open.

CHANGELOG.md

@@ -7,10 +7,13 @@ you run it for the first time.**
 
 ### Wallet Changes:
 #### Configuration
-  Wallet now has option `wallet-migrate-no-rescan`/`migrate-no-rescan` if you
-want to disable rescan when migration recommends it. It may result in the
-incorrect txdb state, but can be useful if you know the issue does not affect
-your wallet or is not critical.
+- Wallet now has option `wallet-migrate-no-rescan`/`migrate-no-rescan` if you
+  want to disable rescan when migration recommends it. It may result in the
+  incorrect txdb state, but can be useful if you know the issue does not affect
+  your wallet or is not critical.
+- Add `--wallet-preload-all` (or `--preload-all` for standalone wallet node)
+  that will open all wallets before starting other services (e.g. HTTP).
+  By default this is set to `false`.
 
 #### Wallet API
 

lib/wallet/node.js

@@ -52,8 +52,9 @@ class WalletNode extends Node {
       wipeNoReally: this.config.bool('wipe-no-really'),
       spv: this.config.bool('spv'),
       walletMigrate: this.config.uint('migrate'),
+      icannlockup: this.config.bool('icannlockup', false),
       migrateNoRescan: this.config.bool('migrate-no-rescan', false),
-      icannlockup: this.config.bool('icannlockup', false)
+      preloadAll: this.config.bool('preload-all', false)
     });
 
     this.rpc = new RPC(this);

lib/wallet/plugin.js

@@ -57,8 +57,9 @@ class Plugin extends EventEmitter {
       wipeNoReally: this.config.bool('wipe-no-really'),
       spv: node.spv,
       walletMigrate: this.config.uint('migrate'),
+      icannlockup: this.config.bool('icannlockup', false),
       migrateNoRescan: this.config.bool('migrate-no-rescan', false),
-      icannlockup: this.config.bool('icannlockup', false)
+      preloadAll: this.config.bool('preload-all', false)
     });
 
     this.rpc = new RPC(this);

lib/wallet/wallet.js

@@ -199,9 +199,9 @@ class Wallet extends EventEmitter {
     const account = await this._createAccount(options, passphrase);
     assert(account);
 
-    this.logger.info('Wallet initialized (%s).', this.id);
+    await this.txdb.open(this);
 
-    return this.txdb.open(this);
+    this.logger.info('Wallet initialized (%s).', this.id);
   }
 
   /**
@@ -215,9 +215,8 @@ class Wallet extends EventEmitter {
     if (!account)
       throw new Error('Default account not found.');
 
+    await this.txdb.open(this);
     this.logger.info('Wallet opened (%s).', this.id);
-
-    return this.txdb.open(this);
   }
 
   /**

lib/wallet/walletdb.js

@@ -208,11 +208,10 @@ class WalletDB extends EventEmitter {
     if (this.options.wipeNoReally)
       await this.wipe();
 
-    await this.watch();
     await this.loadState();
 
     this.logger.info(
-      'WalletDB loaded (depth=%d, height=%d, start=%d).',
+      'WalletDB is loading (depth=%d, height=%d, start=%d).',
       this.depth,
       this.state.height,
       this.state.startHeight);
@@ -239,6 +238,9 @@ class WalletDB extends EventEmitter {
       }
     }
 
+    await this.preloadAll();
+    await this.watch();
+
     this.logger.info('WalletDB opened.');
     this.emit('open');
   }
@@ -258,6 +260,22 @@ class WalletDB extends EventEmitter {
     b.put(layout.V.encode(), value);
   }
 
+  /**
+   * Preload all wallets.
+   * @returns {Promise}
+   */
+
+  async preloadAll() {
+    if (!this.options.preloadAll)
+      return;
+
+    this.logger.info('Preloading all wallets...');
+    const wallets = await this.getWallets();
+
+    for (const wname of wallets)
+      await this.get(wname);
+  }
+
   /**
    * Verify network.
    * @returns {Promise}
@@ -899,7 +917,7 @@ class WalletDB extends EventEmitter {
   /**
    * Map wallet id to wid.
    * @param {String|Number} id
-   * @returns {Promise} - Returns {Number}.
+   * @returns {Promise<Number>}
    */
 
   async ensureWID(id) {
@@ -915,7 +933,7 @@ class WalletDB extends EventEmitter {
   /**
    * Map wallet id to wid.
    * @param {String} id
-   * @returns {Promise} - Returns {Number}.
+   * @returns {Promise<Number>}
    */
 
   async getWID(id) {
@@ -932,7 +950,7 @@ class WalletDB extends EventEmitter {
   /**
    * Map wallet wid to id.
    * @param {Number} wid
-   * @returns {Promise} - Returns {String}.
+   * @returns {Promise<String?>}
    */
 
   async getID(wid) {
@@ -947,7 +965,7 @@ class WalletDB extends EventEmitter {
   /**
    * Get a wallet from the database, setup watcher.
    * @param {Number|String} id
-   * @returns {Promise} - Returns {@link Wallet}.
+   * @returns {Promise<Wallet?>}
    */
 
   async get(id) {
@@ -969,7 +987,7 @@ class WalletDB extends EventEmitter {
    * Get a wallet from the database without a lock.
    * @private
    * @param {Number} wid
-   * @returns {Promise} - Returns {@link Wallet}.
+   * @returns {Promise<Wallet?>}
    */
 
   async _get(wid) {
@@ -2527,8 +2545,9 @@ class WalletOptions {
     this.spv = false;
     this.wipeNoReally = false;
     this.walletMigrate = -1;
-    this.migrateNoRescan = false;
     this.icannlockup = false;
+    this.migrateNoRescan = false;
+    this.preloadAll = false;
 
     if (options)
       this.fromOptions(options);
@@ -2621,6 +2640,11 @@ class WalletOptions {
       this.migrateNoRescan = options.migrateNoRescan;
     }
 
+    if (options.preloadAll != null) {
+      assert(typeof options.preloadAll === 'boolean');
+      this.preloadAll = options.preloadAll;
+    }
+
     return this;
   }
 
@@ -2652,6 +2676,11 @@ function fromString(str) {
   return buf;
 }
 
+/**
+ * @param {Buffer} buf
+ * @returns {String}
+ */
+
 function toString(buf) {
   assert(buf.length > 0);
   assert(buf[0] === buf.length - 1);