pub const BIP30_DEACTIVATION_MAINNET: u64 = u64::MAX /* 18_446_744_073_709_551_615u64 */;Expand description
BIP30 has no deactivation height. u64::MAX keeps height <= deactivation true
at every height. The two historical duplicate blocks are exempt by hash inside
check_bip30, not by turning the rule off after block 91722.