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+/**
+ * Copyright 2025 LY Corporation
+ *
+ * LY Corporation licenses this file to you 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:
+ *
+ *   https://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.
+ */
+import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { PassportStrategy } from '@nestjs/passport';
+import { ExtractJwt, JwtFromRequestFunction, Strategy } from 'passport-jwt';
+
+import type { UserTypeEnum } from '@/domains/admin/user/entities/enums';
+import type { ConfigServiceType } from '@/types/config-service.type';
+
+interface IPayload {
+  sub: string;
+  email: string;
+  type: UserTypeEnum;
+  iat: number;
+  exp: number;
+}
+
+interface StrategyOptions {
+  jwtFromRequest: JwtFromRequestFunction;
+  ignoreExpiration: boolean;
+  secretOrKey: string;
+}
+
+@Injectable()
+export class JwtStrategy extends PassportStrategy(Strategy) {
+  constructor(configService: ConfigService<ConfigServiceType>) {
+    const { secret } = configService.get('jwt', { infer: true }) ?? {};
+
+    super({
+      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
+      ignoreExpiration: false,
+      secretOrKey: secret,
+    } as StrategyOptions);
+  }
+
+  validate(payload: IPayload) {
+    const { email, sub, type } = payload;
+    return { id: sub, email, type };
+  }
+}