feature request: get redirect url

hi! i created a custom theme, everything runs on vue.js and all i need from your plugin, would be a redirect url to paypal. but i cant figure out, how this is done. i used to work with the old paypal standard thingy, but that 1 seems outdated, so i switched to your solution. is this even possible? please correct me, when im wrong, but it seems like you are using paypal-sdk for all the buttons? since i created my own pp express button and that works fine, i could modify it here for my needs, but am a bit confused. simply because i kinda liked how its done the old way.. thanks!