A BOLT 11 compatible invoice is required to make payments through the Lightning Network.
Payment stuck
Sometimes payments are not instantly processed by the Lightning Network. For instance, if a node included the payment route suddenly goes offline the payment will be stuck until the HTLC expires.
Since a Lightning Network payment can be stuck, or take longer than an HTTP request timeout, we recommend you subscribe to withdrawal events. You can subscribe to withdrawal events by passing url endpoint on the callbackUrl parameter.
