message: maker-taker flag
diff: @@ -98,6 +98,14 @@ class Flow {
  this._attachSwapApp(swap.app)
  }
  + isTaker(): boolean {
  + return !this.isMaker()
  + }
  +
  + isMaker(): boolean {
  + return this.swap.isMy
  + }
  +
  _attachSwapApp(app) {
  SwapApp.required(app)
  