(6, 0u64, required), // user_payment_id required for compatibility with 0.0.103 and earlier
(7, claim_deadline, option),
(8, payment_preimage, option),
(6, 0u64, required), // user_payment_id required for compatibility with 0.0.103 and earlier
(7, claim_deadline, option),
(8, payment_preimage, option),