the provided authorization grant code is invalid or was issued to another client

[watchshopeu_0]

I'm getting this error when trying to use OAUTH, i've checked and my key is in the right  format i.e it does not start with "code="

{"error":"invalid_grant","error_description":"the provided authorization grant code is invalid or was issued to another client"}

the token from get_token looks like this

v^1.1#i^1#f^0#p^1#r^0#I^3#t^H4sIAAAAAAA.......................

Any help is much appreciated!

import EbayAuthToken from 'ebay-oauth-nodejs-client';

const line = "---------------------------------------------------------------------------------------------------";

const seperator = `\n${line}\n`

const ebayAuthToken = new EbayAuthToken({

    clientId: 'xxxxxxx',

    clientSecret: 'xxxxxx'

});

const scopes ={ scopes: [

  'https://api.ebay.com/oauth/api_scope',

  'https://api.ebay.com/oauth/api_scope/sell.fulfillment',

  'https://api.ebay.com/oauth/api_scope/sell.fulfillment.readonly'

]};

async function get_token(){

  //Get token object (we will receive it as a string so we have to convert it)

  const token = await ebayAuthToken.getApplicationToken('PRODUCTION', scopes);

  //convert to json

  const token_object = JSON.parse(token);

  console.log(seperator+`Authorization code`+seperator+token_object.access_token+seperator);

  exchange_authorization_code_for_access_token(token_object.access_token);

}

async function exchange_authorization_code_for_access_token(code){

  const accessToken = await ebayAuthToken.exchangeCodeForAccessToken('PRODUCTION', code);

  console.log(accessToken);

}

get_token();

[five_notch_trading_post · Accepted solution]

ebayAuthToken.getApplicationToken is for obtaining an Application token. Which is a separate thing from a user token.

What you are looking for is ebayAuthToken.generateUserAuthorizationUrl(environment, scopes[, options])

You then load the resulting URL in a browser, log in, and once you are logged in, the URL in the browser will then have a code= in it. You grab the stuff between the code= & and submit that to exchange_authorization_code_for_access_token, which will then result in the User access token

It will also return a refresh token along with it, which you can then use

ebayAuthToken.getAccessToken(environment, refreshToken, scopes)

to refresh the access token without logging back in.

[watchshopeu_0]

Thank you so much for your reply!

It cleared up a lot of confusion regarding the different tokens. In my opinion the documentation is extremely lacking and confusing. I study engeering in this field and I do way more complicated things daily but its's very hard with the lacking documentation.