fix(lib): detect failures on challenge method initialization

Signed-off-by: Xe Iaso <me@xeiaso.net>

lib/challenge/wasm/wasm.go

@@ -18,7 +18,7 @@ import (
 //go:generate go tool github.com/a-h/templ/cmd/templ generate
 
 func init() {
-	chall.Register("hashx", &Impl{algorithm: "argon2id"})
+	chall.Register("hashx", &Impl{algorithm: "hashx"})
 	chall.Register("sha256", &Impl{algorithm: "sha256"})
 }
 
@@ -37,7 +37,11 @@ func (i *Impl) Setup(mux *http.ServeMux) error {
 
 	i.runner, err = wasm.NewRunner(context.Background(), fname, fin)
 
-	return err
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
 func (i *Impl) Issue(w http.ResponseWriter, r *http.Request, lg *slog.Logger, in *chall.IssueInput) (templ.Component, error) {

lib/config.go

@@ -175,7 +175,9 @@ func New(opts Options) (*Server, error) {
 
 	for _, implKind := range challenge.Methods() {
 		impl, _ := challenge.Get(implKind)
-		impl.Setup(mux)
+		if err := impl.Setup(mux); err != nil {
+			return nil, fmt.Errorf("failed to init challenge method %s: %w", implKind, err)
+		}
 	}
 
 	result.mux = mux