context.go

package main

import (
	"fmt"
	"net/http"
	"strings"
)

// ValidateNetwork validates and normalizes the network parameter
// Returns the normalized network name or error if invalid
func (app *App) ValidateNetwork(network string) (string, error) {
	// Normalize network name
	network = strings.ToLower(strings.TrimSpace(network))

	// Default to configured default network if empty
	if network == "" {
		return app.config.DefaultNetwork, nil
	}

	// Validate network
	switch network {
	case "mainnet", "testnet":
		return network, nil
	default:
		return "", fmt.Errorf("invalid network: %s (must be 'mainnet' or 'testnet')", network)
	}
}

// getNetworkParam extracts, validates, and returns the network query parameter.
// Returns the validated network and true, or writes a 400 error and returns false.
func (app *App) getNetworkParam(w http.ResponseWriter, r *http.Request) (string, bool) {
	network, err := app.ValidateNetwork(r.URL.Query().Get("network"))
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return "", false
	}
	return network, true
}