Add more format validation and better error messages#25

Draft

lemoustachiste wants to merge 3 commits intomasterfrom chore/ts-as-is

+85-7

Commits on Feb 3, 2021

feat(ExplorerApi): ensure validity of passed explorers
Julien Fraichot
committed
feat(ExplorerApi): stronger verification and clearer error message
Julien Fraichot
committed

Commits on Feb 4, 2021

test(LookForTx): remove commented and irrelevant tests
Julien Fraichot
committed