allow empty notes

lib/storage.js

@@ -663,7 +663,7 @@ Storage.prototype.fetchTxNote = function(walletId, txid, cb) {
     txid: txid,
   }, function(err, result) {
     if (err) return cb(err);
-    if (!result || !result.body) return cb();
+    if (!result) return cb();
     return self._completeTxNotesData(walletId, Model.TxNote.fromObj(result), cb);
   });
 };
@@ -699,7 +699,6 @@ Storage.prototype.fetchTxNotes = function(walletId, opts, cb) {
   this.db.collection(collections.TX_NOTES).find(filter).toArray(function(err, result) {
     if (err) return cb(err);
     var notes = _.compact(_.map(result, function(note) {
-      if (!note.body) return;
       return Model.TxNote.fromObj(note);
     }));
     return self._completeTxNotesData(walletId, notes, cb);

test/integration/server.js

@@ -4058,7 +4058,7 @@ describe('Wallet service', function() {
         });
       });
     });
-    it('should be possible to remove a note', function(done) {
+    it('should be possible to set an empty note', function(done) {
       server.editTxNote({
         txid: '123',
         body: 'note body'
@@ -4078,8 +4078,18 @@ describe('Wallet service', function() {
               txid: '123',
             }, function(err, note) {
               should.not.exist(err);
-              should.not.exist(note);
-              done();
+              should.exist(note);
+              note.should.have.property('body');
+              should.equal(note.body, null);
+              server.getTxNotes({
+                minTs: 0
+              }, function(err, notes) {
+                should.not.exist(err);
+                should.exist(notes);
+                notes.length.should.equal(1);
+                should.equal(notes[0].body, null);
+                done();
+              });
             });
           });
         });