getPIHForFirstInvoice function
Returns the predefined PIH (Public Invoice Hash) string for the first invoice.
Implementation
String getPIHForFirstInvoice() {
return 'NWZlY2ViNjZmZmM4NmYzOGQ5NTI3ODZjNmQ2OTZjNzljMmRiYzIzOWRkNGU5MWI0NjcyOWQ3M2EyN2ZiNTdlOQ==';
}