This is the fourth release candidate for the upcoming MANDATORY 1.22.0 release of Lotus. This release will deliver the nv19 Lighting and nv20 Thunder network upgrade.
Note that this release candidate sets the calibration upgrade epoch, and does NOT set the epoch at which mainnet will upgrade; that detail will be finalized in the 1.22.0 release.
The Lighting and Thunder upgrade introduces the following Filecoin Improvement Proposals (FIPs), delivered by builtin-actors v11 (see actors v11.0.0):
- FIP 0060 - Thirty day market deal maintenance interval
- FIP 0061 - WindowPoSt grindability fix
- FIP 0062 - Fallback method handler for multisig actor
Lighting and Thunder
As you may have noticed, that we are doing a two-stage incremental network upgrades in this release. This essentially means that there will be two network versions rolled out together -- nv19 and nv20.
The two stage roll out is required for FIP-0061 - which introduces a new proof that reduces the grindability of windowPoSt and furthur secures the network. At the first upgrade, the new proof type will start to be accepted by the protocol, while the second upgrade (nv20) marks the spot when the old proof type will no longer be accepted. This allows for a smooth rollover period during which both proof types are accepted. Lotus will start generating the new proof types immediately after the nv19 upgrade.
This is something we've safely done before. The second upgrade is something of a "ghost" upgrade -- no migration runs, and no code changes, except that clients will start reporting the new network version of nv20 to the FVM.
Expedited nv19 rollout
In light of the recent degraded chain quality on the mainnet an expedited nv19 upgrade has been proposed and accepted to roll out the market cron mitigation (FIP0060) that will improve block validation times, and with that the delay in block production that is causing a decrease in the chain quality currently.
With this expedited roll out we want to inform you of some key changes and important dates:
- Accelerate the nv19-upgrade on mainnet from May 11th to April 27th.
- Derisk nv19 by descoping the sector info migration, activation epoch fixes and drop [FIP0052 - Extend sector/deal max duration to 3.5 year.](https://github.com/filecoin-project/FIPs/blob/master/FIPS/fip-0052.md)
- By descoping these changes we can greatly derisk the network upgrade itself by removing a heavy migration that could cause instability for storage providers and node operators during the network upgrade.
- Increase the rollover period for [FIP0061](https://github.com/filecoin-project/FIPs/blob/master/FIPS/fip-0052.md) from 1 week to 3 weeks on mainnet. The rollover period is the duration between nv19 and nv20 which both old proofs (v1) and the new proofs (v1_1) proofs will be accepted by the network.
The Lighting and Thunder upgrade now implements the following Filecoin Improvement Proposals (FIPs), delivered by builtin-actors v11 (see actors v11.0.0-rc.2):
- FIP 0060 - Thirty day market deal maintenance interval
- FIP 0061 - WindowPoSt grindability fix
- FIP 0062 - Fallback method handler for multisig actor
Calibration nv19 Lighting and nv20 Thunder Upgrade
This release candidate sets:
- The calibration nv19 Lighting upgrade at epoch
489094,2023-04-20T14:00:00Z - The calibration nv20 Thunder upgrade at epch
492214,2023-04-21T16:00:00Z
v11 Builtin Actor Bundles
You may also check that your lotus actor bundle matches the v11 actors manifest by running
./lotus state actor-cids --network-version 19 Tue Apr 18 11:07:40 2023
Network Version: 19
Actor Version: 11
Manifest CID: bafy2bzaceajj76ms4q2ka3ckzj2iiifl7ewxqdpolshcmhml32sqwolrmsh6e
Actor CID
eam bafk2bzacebq2zzzkcra7ahantiq7xlkgcrkoq2azmeqpwhoie5gxcxhurbdp2
multisig bafk2bzaceavnestm7obwlj3moeewcnuomzigfzys4lt26s3l3psjeligf4hju
paymentchannel bafk2bzaceb4vefsbgswrciqo26wnacvqwpicqjfyicwsdjmv4rbcc4zeae72g
storagepower bafk2bzacebdoeoiayvshg4zaxygmpuituux3ccd4gxfl3ile7ckpsyy7kpnms
cron bafk2bzacediqvwudrujh7ejowrcumrnara7k2fonr35vulnggpwwwh3o32pmu
datacap bafk2bzaceb7jkx5kxwwbkw5ehz63sq2b6urouegn4cdczlziaw5ea44u67ock
account bafk2bzacecsf7v7mm4osq7cqbygyudg5zkwqbpbkmi3iluakugzvbd2cuucfw
ethaccount bafk2bzacebrtwz4nyl3nkgjfpvtqjrjixnbujkr72fwzf5bqhpqfo4hgbjqo2
init bafk2bzacebwfs5wna2dculc4mpl4a25cjrmguoscbebeb5g5yft4ntfpku7cu
placeholder bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro
storagemarket bafk2bzacechvhqru32tw7zii2raii3upjrkybiubepjtartyhzibnac57gxyo
storageminer bafk2bzacedu6tzfpxwzqym3z2j252d57gqj3jduap7ijf5mczvhmsirs6wxfs
verifiedregistry bafk2bzacecjshlgoyim3r2uvhtjthu5udxpq5fvjy4pmpi3sy4v6a4chjvb4k
evm bafk2bzacecoxcwxbukue76b4rrqhnjywgzjdlhbbemma4kqdzalpkgtdpog7q
reward bafk2bzacedyl4uerjbw3tu5mcgkn7ftvr3j3poy4uv5tuzyuvcdinjb75cz3w
system bafk2bzaceatn5cj3jqmrug65ur26jhrzcgmishv5hjfswvsyxsieccchhwies