is.valid_receipt: Determine whether or not a given message receipt is valid
Description
is.valid_receipt determines whether or not a given message receipt
is valid or not according to Pushover's specifications. It does not determine
whether or not the given receipt actually exists.
Usage
is.valid_receipt(receipt)
Arguments
receipt
A message receipt (e.g., 'KAWXTswy4cekx6vZbHBKbCKk1c1fdf')
Value
A boolean value indicating if the message receipt is valid
(TRUE) or not (FALSE)