BIP-8 / BIP-9 (Soft Fork Activation)
Protocol● Common

Standards for coordinating soft fork activation through miner signaling. BIP-9 uses version bits with timeout. BIP-8 adds mandatory activation option (LOT=true) ensuring activation even without majority miner signal.

Technical Notes

BIP-9: signal in version field, activate after 95% threshold in retarget period, timeout fails. BIP-8: LOT=false same as BIP-9; LOT=true activates at timeout regardless. Taproot used Speedy Trial variant.

Metadata

Visibility: Public
Created:1/3/2026by System

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