https://developers.google.com/android-publisher/authorization
According to official proceduce, Refresh Token is required in which is used to generate access token to verify the receipt of IAB...
- install node.js > 8.x
- create your project on Google API console
- create your OAuth 2.0 client ID under
APIs & Services > Credentials > Create creditials > OAuth client ID > Web application- pass your client id and secret as arguments
- create your OAuth 2.0 client ID under
git clone ${PROJECT}
cd ${PROJECT}
npm install
node get_refresh_token --client-id ${CLIENT_ID} --client-secret ${CLIENT_SECRET}
once everything is fine, the program will try to open a browse page which is required to login your google account, make sure that account have right to access your financial report of Google Play (since it is necessary permission to verify the recept of iab)