* Add SignModeHandler and LegacyAminoJSONHandler * Simplify, add tests * Add godocs * Add handler map * Rename HandlerMap * Don't use pointer * Lint * Lint * Update x/auth/signing/amino/amino.go Co-authored-by: Marko <marbar3778@yahoo.com> Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com> Co-authored-by: Marko <marbar3778@yahoo.com>