Enabling AMP payments - $@1,000,000

[kevkevinpal]

[Description]
We want to enable AMP payments in addition to keysend messages with sphinx-relay

This is because right now if there is a node runner who wants to send a payment using sphinx but the payment is larger than the amount of funds they can send through a single channel the payment will fail.

With this change we need to allow both keysend and amp and we can do this in two ways, either first try a keysend and if it fails try an AMP payment or the otherway around

Some changes have been made as a start here --> #353

But for some reason when trying to startup sphinx-stack with --accept-amp we still run into the error destination doesn\'t support AMP payments

Currently testing off of this branch in sphinx-stack
https://github.com/stakwork/sphinx-stack/tree/lightingLabsLnd

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[Complexity] (1,2,3,5,7)

3

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[To Reproduce]

Download the sphinx-stack and sphinx-relay

get the testing environment running for sphinx-stack

run
npx ava src/tests/controllers/ampMessage.test.ts --verbose --serial --timeout=2m

it fails right now but we need to get it to pass

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[etc]
If you're having troubles getting the env setup or are having other issue please checkout this doc
https://github.com/stakwork/sphinx-stack/blob/master/docs/developingOnSphinx.md
or join the developing on sphinx tribe
or throw a comment below for help

[Evanfeenstra]

I would say first try AMP, then keysend :)

[kevkevinpal]

closing this issue since the PR @antonilol has open fixes this issue will open another issue to help resolve the blocker we're having on the PR which is getting it to work with proxy server