Combining parameters to generate a signature for SKAdNetwork 2
Generate signatures to sign your ad with version 2.
Overview
To generate the signature, first combine the values of Ad network install-validation keys for the version 2.
Strings for version 2 and earlier don’t include a fidelity-type parameter. For version 2, combine the values into a UTF-8 string with an invisible separator (‘\u2063’) between them, in the exact order shown:
Listing 1. Parameter values combined, in order, for version 2.
version + '\u2063' + ad-network-id + '\u2063' + campaign-id + '\u2063' + itunes-item-id + '\u2063' + nonce + '\u2063' + source-app-id + '\u2063' + timestamp