Partial completion of exchangehistory, need to redo routing regex

api_exchange.go

cmd/exchange_server

cmd/exchange_server.go

currency.go

vendor/github.com/alediaferia/gocountries/LICENSE

vendor/github.com/alediaferia/gocountries/README.md

vendor/github.com/alediaferia/gocountries/country.go

vendor/github.com/alediaferia/gocountries/gocountries.go

vendor/github.com/go-chi/chi/.gitignore

vendor/github.com/go-chi/chi/CHANGELOG.md

vendor/github.com/go-chi/chi/CONTRIBUTING.md

vendor/github.com/go-chi/chi/LICENSE

vendor/github.com/go-chi/chi/Makefile

vendor/github.com/go-chi/chi/README.md

vendor/github.com/go-chi/chi/chain.go

vendor/github.com/go-chi/chi/chi.go

vendor/github.com/go-chi/chi/context.go

vendor/github.com/go-chi/chi/go.mod

vendor/github.com/go-chi/chi/middleware/basic_auth.go

vendor/github.com/go-chi/chi/middleware/clean_path.go