Where to connect the acquiring script? How to remove warning on onSubmit?

Question

Payment systems

Hello everyone,
I'm making a site on gatsby. You need to connect payment through Tinkoff. Several questions arose:

1. Should the script be connected to all scripts in html.js? Or where?
2. Warning in console Warning: Expected `onSubmit` listener to be a function, instead got a value of `string` type.
3. Pay is undefined, but perhaps the first two questions will solve this problem.
thanks in advance

Answer 1

Or where?

they wrote to you - in which
3. it will be decided how Tinkoff v2 will boot
and 2 too