@sp-api-sdk/auth/dist/es/index.js

Amazon Selling Partner API authentication package

import process from 'node:process';
import { AxiosError } from 'axios';
import { SellingPartnerApiAuthError } from './error';
import { axios } from './utils/axios';
/**
 * Class for simplify auth with Selling Partner API
 */
export class SellingPartnerApiAuth {
    clientId;
    clientSecret;
    refreshToken;
    scopes;
    #accessToken;
    #accessTokenExpiration;
    constructor(parameters) {
        const clientId = parameters.clientId ?? process.env.LWA_CLIENT_ID;
        const clientSecret = parameters.clientSecret ?? process.env.LWA_CLIENT_SECRET;
        const refreshToken = parameters.refreshToken ?? process.env.LWA_REFRESH_TOKEN;
        if (!clientId) {
            throw new Error('Missing required `clientId` configuration value');
        }
        if (!clientSecret) {
            throw new Error('Missing required `clientSecret` configuration value');
        }
        if (!refreshToken && !parameters.scopes) {
            throw new TypeError('Either `refreshToken` or `scopes` must be specified');
        }
        this.clientId = clientId;
        this.clientSecret = clientSecret;
        this.refreshToken = refreshToken;
        this.scopes = parameters.scopes;
    }
    /**
     * Get access token
     */
    async getAccessToken() {
        if (!this.#accessToken ||
            (this.#accessTokenExpiration && Date.now() >= this.#accessTokenExpiration.getTime())) {
            const body = {
                client_id: this.clientId,
                client_secret: this.clientSecret,
                ...(this.refreshToken
                    ? {
                        grant_type: 'refresh_token',
                        refresh_token: this.refreshToken,
                    }
                    : {
                        grant_type: 'client_credentials',
                        scope: this.scopes.join(' '),
                    }),
            };
            try {
                const expiration = new Date();
                const { data } = await axios.post('/o2/token', body);
                expiration.setSeconds(expiration.getSeconds() + data.expires_in);
                this.#accessToken = data.access_token;
                this.#accessTokenExpiration = expiration;
            }
            catch (error) {
                if (error instanceof AxiosError) {
                    throw new SellingPartnerApiAuthError(error);
                }
                throw error;
            }
        }
        return this.#accessToken;
    }
    /**
     * Access token expiration date
     */
    get accessTokenExpiration() {
        return this.#accessTokenExpiration;
    }
}
export { SellingPartnerApiAuthError } from './error';
export { AuthorizationScope } from './types/scope';