| UPDATE\|14 | +expiry_too_soon+ | The CLTV expiry is too close to the current block height for safe
handling by the processing node
| PERM\|15 | +incor⁠rect_or_unknown_​payment_details+ | The `payment_hash` is unknown to the final node, the `payment_secret` doesn't
| PERM\|15 | +incor⁠rect_or_unknown_​pay⁠ment_details+ | The `payment_hash` is unknown to the final node, the `payment_secret` doesn't
match the `payment_hash`, the amount for that `payment_hash` is incorrect, or
the CLTV expiry of the HTLC is too close to the current block height for safe