add onlyKey opts to storage #getFirst

js/models/Profile.js

@@ -45,7 +45,7 @@ Profile.create = function(email, password, storage, cb) {
 
 
 Profile.any = function(storage, cb) {
-  storage.getFirst(Profile.key(''), function(err, v, k) {
+  storage.getFirst(Profile.key(''), { onlyKey: true}, function(err, v, k) {
     return cb(k ? true : false);
   });
 };

js/models/Storage.js

@@ -175,13 +175,21 @@ Storage.prototype.get = function(key, cb) {
   })
 };
 
-Storage.prototype.getFirst = function(prefix, cb) {
+Storage.prototype.getFirst = function(prefix, opts, cb) {
+  opts = opts || {};
+
   var self = this;
   this.db.allKeys(function(allKeys) {
     var keys = _.filter(allKeys, function(k) {
       if ((k === prefix) || k.indexOf(prefix) === 0) return true;
     });
-    if (keys.length === 0) return cb(new Error('not found'));
+
+    if (keys.length === 0)
+      return cb(new Error('not found'));
+
+    if (opts.onlyKey)
+      return cb(null, null, keys[0]);
+
     self._read(keys[0], function(v) {
       if (_.isNull(v)) return cb(new Error('Could not decrypt data'), null, keys[0]);
       return cb(null, v, keys[0]);
@@ -206,7 +214,7 @@ Storage.prototype.delete = function(key, cb) {
 
 Storage.prototype.deletePrefix = function(prefix, cb) {
   var self = this;
-  this.getFirst(prefix, function(err, v, k) {
+  this.getFirst(prefix, {}, function(err, v, k) {
     if (err || !v) return cb(err);
 
     self.delete(k, function(err) {

js/models/Wallet.js

@@ -175,7 +175,7 @@ Wallet.key = function(str) {
 
 
 Wallet.any = function(storage, cb) {
-  storage.getFirst(Wallet.key(''), function(err, v, k) {
+  storage.getFirst(Wallet.key(''),  { onlyKey: true}, function(err, v, k) {
     return cb(k ? true : false);
   });
 };
@@ -259,7 +259,7 @@ Wallet.read = function(walletId, readOpts, cb) {
     err;
   var obj = {};
 
-  storage.getFirst(Wallet.key(walletId), function(err, ret) {
+  storage.getFirst(Wallet.key(walletId), {}, function(err, ret) {
     if (err) return cb(err);
 
     if (!ret)

test/Storage.js

@@ -347,7 +347,7 @@ describe('Storage model', function() {
       sinon.stub(s, '_read', function(k, cb) {
         return cb(data[k]);
       });
-      s.getFirst('wallet::id1', function(err, w) {
+      s.getFirst('wallet::id1', {}, function(err, w) {
         should.not.exist(err);
         w.should.exist;
         w.hasOwnProperty('a').should.be.true;