pub const BIP54_ACTIVATION_MAINNET: u64 = u64::MAX; // 18_446_744_073_709_551_615u64Expand description
BIP54: Consensus Cleanup - Mainnet activation height
BIP54 specifies “for all blocks after activation” the new rules apply. We must not enforce before that height or we would reject valid pre-activation blocks (e.g. coinbase with lock_time=0, 64-byte txs). Signalling/miner compatibility is about when activation locks in; the activation height is the first block from which rules apply. Set to the network-agreed height once known (or make configurable so operators can set without a new binary).