PaymentChannelAuthorize

To authorize a Payment Channel, an off ledger "receipt" must be signed. This is implemented in Xaman through a 'Pseudo Transaction' with TransactionType `PaymentChannelAuthorize`.

PaymentChannelAuthorize is normally a 'Command' or locally signed object. Implemented in Xumm as a TransactionType (which it actually isn't, also: the resulting signed blob can never be submitted to an XRPL node as is). For more information, see: https://xrpl.org/use-payment-channels.html

Sample PayChan transactions (gist):

https://gist.github.com/WietseWind/c7b6addfd9b8cb465894209cc9073c47

Note: the PaymentChannelAuthorize transaction type is useful when you want to authorize a payment channel without submitting a transaction to the XRPL.