(10, *encrypted_tlvs, required_vec),
(12, intro_node_blinding_point, option),
(18, HighZeroBytesDroppedBigSize(*total_msat), required)
(10, *encrypted_tlvs, required_vec),
(12, intro_node_blinding_point, option),
(18, HighZeroBytesDroppedBigSize(*total_msat), required)