Release 0.9.0

[arajasek]

Lotus 0.9.0 Release

This is a large consensus-breaking release that will be introduced to the ignition. The goal is to test out a major specs-actor upgrade: this includes the ability to switch between 2 actors versions as needed, the operations efforts required for such upgrades, and the mining community's ability to consume such an upgrade release.

Estimated shipping date

Wednesday, October 7, 2020.

What's left to do

Must haves

• Land Introduce v2 actors #3936, start using actors v2
• Land Bugfix: Runtime's Receiver() should only return ID addresses #3589
• Land Update miner eligibility checks for v2 actors #4188: Use MinerPoStLookbackEligibleForElection and MinerEligibleForElection to determine eligibility (see Implement MinerEligibleForElection in block validation #3378)
• Run a full chain import (in progress)
• Land Support addresses with mainnet prefixes #4186: Make default address encoding to f
• Land Add funds that have left FilReserve to circ supply #4160: Modify StateCircSupply to account for faucet (research-priv 349)
• Land Update to actors v2.0.1 #4199: Update specs-actors one last time to the tagged version (Baseline migration specs-actors#1215 needs to land)
• Confirm 130800, and set that in code (Friday the 9th, 0800 UTC)

Should haves

• Land Add a CLI command to set a miner's owner address #4189: Expose CLI to change owner address of a miner actor: Be able to change owner address of a miner actor  #3951
• Land Set WinningPoStSectorSetLookback to finality post-v2 actors #4190: Set WinningPoStSectorLookback to finality
• Land fix: error when actor panics directly #3697: Error when actor panics directly
• Include this.

Not gonna have

• Abort if beneficiary is not found: fix: abort if beneficiary is not found #3479
• Guard against self beneficiary when deleting actor fix: guard against self beneficiary when deleting actor #3478
• 387 research
• Lotus fetches drand from chain backwards with null blocks while specs fetches forward: Lotus fetches drand from chain backwards with null blocks while specs fetches forward #3613
• 364 research (more important than 3613)
• Restrict actor exit codes to non-system codes: fix: restrict actor exit codes to non-system codes #3656 (Approved already)
• Actor method params deserialization error exit code: fix: actor method params deserialization error exit code #3730
• (if not covered by above PRs), resolve Fix up all places where we use random incorrect exit codes #3015 and ShimCall error handling is full of dragons #3548
• Audit any param changes in the upgrade, especially stuff we might have hard-copied into Lotus like this.

[zhangshuiyong]

Hop fix selfish-packing problem in lotus block chain. This is a big problem for SpaceRace2 and mainnet in the future, you can review the selfish-packing code by some big & selfish miners in SpaceRace1

[alanshaw]

Any chance to get some other concensus-breaking changes in? I have the following PRs open that seem fairly innocuous:

• Guard against self beneficiary when deleting actor fix: guard against self beneficiary when deleting actor #3478
• Abort if beneficiary is not found: fix: abort if beneficiary is not found #3479
• Restrict actor exit codes to non-system codes: fix: restrict actor exit codes to non-system codes #3656 (Approved already)
• Actor method params deserialization error exit code: fix: actor method params deserialization error exit code #3730

This one also but it's more controversial and needs input:

• Error when actor panics directly: fix: error when actor panics directly #3697

[alanshaw]

My comment above can be ignored - this is not a free for all concensus breaking release, this is concensus breaking that is upgradable within the network so those PRs (as they stand) cannot go in.

[arajasek]

We also want https://github.com/filecoin-proect/lotus/issues/3935

[nicola]

What is the new estimate shipping date for this?

[arajasek]

@nicola Updated the issue, new shipping date is October 7.