File sample to apply refresh token

api.ts

import axios, { AxiosError } from 'axios';

import AsyncStorage from '@react-native-async-storage/async-storage';

const api = axios.create({
  baseURL: 'http://localhost:3000',
});

api.interceptors.request.use(
  async function (config) {
    if (config.url !== '/auth') {
      const token = await AsyncStorage.getItem('@auth/token');

      if (token) {
        config.headers = {
          ...config.headers,
          Authorization: `Bearer ${token}`,
        };
      }
    }

    return config;
  },
  function (error) {
    return Promise.reject(error);
  },
);

api.interceptors.response.use(
  async function (response) {
    return response;
  },
  async function (error: AxiosError) {
    const local_access_token = await AsyncStorage.getItem('@auth/token');

    if (error.response) {
      if (error.response.status === 401) {
        try {
          const rs = await api.get('/refresh', {
            headers: {
              Accept: 'application/json',
              Authorization: `Bearer ${local_access_token}`,
            },
          });

          const { access_token } = rs.data;

          await AsyncStorage.setItem('@auth', JSON.stringify(rs.data));
          await AsyncStorage.setItem('@auth/token', access_token);

          const originalConfig = error.config;

          if (originalConfig) {
            if (access_token) {
              originalConfig.headers = {
                ...originalConfig.headers,
                Authorization: `Bearer ${access_token}`,
              };
            }

            return new Promise((resolve, reject) => {
              axios
                .request(originalConfig)
                .then(response => {
                  resolve(response);
                })
                .catch(_error => {
                  reject(_error);
                });
            });
          } else {
            return;
          }
        } catch (_error) {
          return Promise.reject(_error);
        }
      }
    }

    return Promise.reject(error);
  },
);

export default api;