Uses maldikhan/go.socket.io, a Socket.IO v5-protocol Go client with zero third-party runtime dependencies (beyond golang.org/x/net). Works against the Live-Rates v4 server and the legacy v2/v3 fleet.
go mod tidy
LIVERATES_KEY=trial go run main.goA tiny silent{} logger is wired in to suppress the library's verbose debug output. Remove it if you want to see the full Engine.IO handshake trace.