gopay/internal/jwt/decode.go

// Copyright 2024 perp (supernets)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package jwt

import (
	"github.com/golang-jwt/jwt"
	"github.com/rs/zerolog/log"
)

// Decode a token
func Decode(token string) (*Claims, error) {
	// Create token claims
	tokenClaims, err := jwt.ParseWithClaims(
		token,
		&Claims{},
		func(token *jwt.Token) (interface{}, error) {
			return secret, nil
		},
	)

	// Found token
	if tokenClaims != nil {
		// Map to claims struct & if ok & valid then return
		if claims, ok := tokenClaims.Claims.(*Claims); ok && tokenClaims.Valid {
			return claims, nil
		}
	}

	log.Err(err).Msg("Could not decode JWT claims")
	return nil, err
}