single-step tip resolve

gistfile1.js

  resolve: function (account, callback) {
    if (this.state !== 'created') return callback(new Error('Tip cannot be claimed')); // Sorry, all done

    if (account._id !== this.from_wallet || account._id !== this.to_wallet) {
      return callback(new Error('Wrong wallet')); // Wrong wallet
    }

    this.state = 'resolving';
    this.resolved_id = new ObjectID(); // resolved_id identifies the tip later
    this.save(function (err, tip) {
      if (err) return callback(err);
      return move(tip);
    });

    function move (tip) {
      var body = {
        method: 'move',
        params: [ '', account._id, tip.amount, 6, tip.resolved_id ],
      };

      rpc(body, function (err) {
        if (err) return callback(err);

        tip.state = 'resolved'; // We did it
        account.updateBalance(function (err) { // Update relevant account with new balance
          if (err) return callback(err);
          tip.save(callback);
        });
      });
    }
  }