Change here can silently break tests in station

[Thykof]

The end2end test of the wallet or mainly in the station repo.

The tests there are call to execute function that call the wallet to sign. So when we release a new version of the wallet, the test on station side can break without warning.

So we are testing the endpoint of the wallet through station.

I think we should test the endpoint of the wallet in the wallet repository, so that any change that break the e2e tests will make the CI fail and prevent from merging in the wallet.