Server side verification of Google Play in-app billing purchase signature failed

Question

i\'m currently integrating Google Play in-app billing to my androidgame project, i have a Node.js server set up and plan to send it the \"originalJson\" and \"signature\" va

Answer 1

It seems that your originalJson string is missing some necessary escaping.

I've managed to verify the signature with the escaping added back in:

var originalJson = '{"orderId":"GPA.1312-8694-0319-25069","packageName":"com.shihu.sm.testin","productId":"com.shihu.sm.testin.diamond","purchaseTime":1452598011176,"purchaseState":0,"developerPayload":"{\\"iabProductId\\":\\"com.shihu.sm.testin.diamond\\",\\"gOrderId\\":\\"2cb77de1a2a94db18b6df84f8037ea5b\\",\\"serverId\\":\\"6\\",\\"productId\\":\\"202\\"}","purchaseToken":"bjoncdcebeclpklebmadidgb.AO-J1OyEbKLL0rhWQAc1hjdWyJPXHkAoHZTfZasqUuFWKWyAlnj-opiDLYILNRpnWgcblO8vV37fWf0kpeNMRZcgRT-fRxAO4P8VQPmU-TJakB-sCiRx8sUxL4nxnUBMnZdFWdpaIZDW5tP3Ck4aO57n1o66PwnjZw"}';

Pay attention to the \\'s. The string is different otherwise.