In this commit, we add a new CLI argument that allows a user to control
if we use strict verification or not. Strict verification relies on
checking the actual invoice state against lnd, and requires more state
for the Aperture server.
When strict verification isn't on, we rely only on the preimage payment
hash relationship. Namely that the only way a user can obtain the
preimage is to pay the invoice, and as we check the HMAC on the
macaroon, we know that we created it with an invoice obtained from lnd.
auth: LsatAuthenticator -> L402Authenticator
sed -i 's/LsatAuthenticator/L402Authenticator/g' aperture.go auth/authenticator.go auth/authenticator_test.go
rename package lsat to l402
git mv lsat/ l402
sed 's@aperture/lsat@aperture/l402@g' -i `git grep -l aperture/lsat`
sed -i 's@package lsat@package l402@' `git grep -l 'package lsat'`
sed -i 's@lsat\.@l402.@g' -i `git grep -l 'lsat\.'`
sed 's@l402.Id@lsat.Id@' -i mint/mint_test.go
replace lsat with l402 in the code
sed 's@lsat@l402@' -i mint/mint_test.go
sed 's@Lsat@L402@' -i l402/client_interceptor.go
sed 's@lsatstore@l402store@' -i l402/store_test.go
replace LSAT to L402 in comments
sed '/\/\//s@LSAT@L402@g' -i `git grep -l '//.*LSAT'`
replace LSAT -> L402 in the code, skip when a string starts with it
sed 's@\([^"/]\)LSAT@\1L402@g' -i `git grep -l LSAT`
The new package contains a new interface (`Challenger`) that any
new challenger must implement.
Because aperture uses the new interface instead of using directly the
`LndChallenger` struct I added the `Stop()` method to the
`mint.Challenger`. Instead of also adding the `Start()` method the constructor
returns a Challenger already "started".
