feat(payments): implement token abis

[MohammadNassar1]

This change is 

[ishay-starkware]

src/payments.cairo line 109 at r1 (raw file):

            self.roles.only_app_governor();

            assert(self.is_token_registered(token), TOKEN_DOES_NOT_EXIST);

TOKEN_NOT_REGISTERED

Code quote:

TOKEN_DOES_NOT_EXIST

[ishay-starkware]

Reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @MohammadNassar1)

[MohammadNassar1]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @ishay-starkware)

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src/payments.cairo line 109 at r1 (raw file):

Previously, ishay-starkware wrote…

TOKEN_NOT_REGISTERED

Done.

[ishay-starkware]

Reviewed 3 of 3 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @MohammadNassar1)