Description
When creating an Invoice using functions in the lightning-invoice crate's utils module, the invoice expiration is not set. It should be set with the value encoded in the provided payment secret. Otherwise, BOLT 11 defines the default expiry to be 1 hour whereas ChannelManager will use whatever value is encoded in the payment secret.
This may be tricky because either the methods will need to take in a ChannelManager to verify the payment secret and extract the expiry or the expiry needs to be passed in but could potentially not match what's encoded in the payment secret.