This is a mandatory release of Lotus that introduces the fifth upgrade to the Filecoin network. The network upgrade occurs at height 550321, before which time all nodes must have updated to this release (or later). At this height, v3 specs-actors will take effect, which in turn implements the following two FIPs:
- FIP-0007 h/amt-v3 which improves the performance of the Filecoin HAMT and AMT.
- FIP-0010 off-chain Window PoSt Verification which reduces the gas consumption of
SubmitWindowedPoStmessages significantly by optimistically accepting Window PoSt proofs without verification, and allowing them to be disputed later by off-chain verifiers.
Note that the integration of v3 actors was already completed in 1.4.2, this upgrade simply sets the epoch for the upgrade to occur.
Disputer
FIP-0010 introduces the ability to dispute bad Window PoSts. Node operators are encouraged to run the new Lotus disputer alongside their Lotus daemons. For more information, see the announcement here.
Changes
- #5341 Add a
LOTUS_DISABLE_V3_ACTOR_MIGRATIONenvvar- Setting this envvar to 1 disables the v3 actor migration, should only be used in the event of a failed migration