Go Backend SDK

The official AuthSetu Go SDK allows you to verify JWT session tokens, interact with the AuthSetu REST API, and issue Indian identity verification requests directly from your Go microservices.

Installation

go get github.com/authsetu/authsetu/sdks/go

Initializing the Client

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"

	"github.com/authsetu/authsetu/sdks/go/client"
)

func main() {
	c, err := client.NewClient(&client.Config{
		SecretKey: "sk_live_sample12345",
		BaseURL:   "https://api.authsetu.com",
	})
	if err != nil {
		log.Fatalf("failed to init client: %v", err)
	}

	// Verify an incoming Bearer token
	session, err := c.Sessions.VerifyToken(context.Background(), "user_token_here")
	if err != nil {
		log.Printf("invalid session: %v", err)
		return
	}

	fmt.Printf("Authenticated user ID: %s, Email: %s\n", session.UserID, session.Email)
}

Chi HTTP Middleware Example

func AuthSetuMiddleware(c *client.Client) func(http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			token := r.Header.Get("Authorization")
			if token == "" {
				http.Error(w, `{"error":"unauthorized"}`, http.StatusUnauthorized)
				return
			}

			sess, err := c.Sessions.VerifyToken(r.Context(), token)
			if err != nil {
				http.Error(w, `{"error":"invalid_token"}`, http.StatusUnauthorized)
				return
			}

			ctx := context.WithValue(r.Context(), "user_id", sess.UserID)
			next.ServeHTTP(w, r.WithContext(ctx))
		})
	}
}