Note: Do this after installing the latest package.
Permission Set
To have access to the PosiPay feature, assign PosiPay’s Permission Set to a User with a System Administrator profile.
...
Gateway Event
Click Edit and tick Read and Create under the Object Permissions as well as in Fields Permissions and click Save.
Gateway Account
PosiPay Log
Custom Settings
Gateway Account Settings
Go to Set up > Custom Settings > Gateway Account Settings
...
API Token
Encrypted value of the actual API Token of the gateway account record.
Authenticated
This will tell the system that a certain gateway account record is already authorized.
Publishable Key
Encrypted value of the actual Publishable Key of the gateway account record.
Whole NPC config link
...