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pre-release8 months ago

This is a release candidate of the upcoming MANDATORY Lotus v1.26.0 release, which will deliver the Filecoin network version 22, codenamed Dragon 🐉.

This release candidate sets the calibration network to upgrade at epoch 1427974, which is 2024-03-11T14:00:00Z
This release does NOT set the mainnet upgrade epoch yet, in which will be updated in the final release.
The Filecoin network version 22 delivers the following FIPs:

v13 Builtin Actor Bundle

The actor bundles for the calibration network can be checked as follows: 

lotus state actor-cids --network-version=22
Network Version: 22
Actor Version: 13
Manifest CID: bafy2bzacea4firkyvt2zzdwqjrws5pyeluaesh6uaid246tommayr4337xpmi

Actor             CID  
account           bafk2bzaceb3j36ri5y5mfklgp5emlvrms6g4733ss2j3l7jismrxq6ng3tcc6
cron              bafk2bzaceaz6rocamdxehgpwcbku6wlapwpgzyyvkrploj66mlqptsulf52bs
datacap           bafk2bzacea22nv5g3yngpxvonqfj4r2nkfk64y6yw2malicm7odk77x7zuads
eam               bafk2bzaceatqtjzj7623i426noaslouvluhz6e3md3vvquqzku5qj3532uaxg
ethaccount        bafk2bzacean3hs7ga5csw6g3uu7watxfnqv5uvxviebn3ba6vg4sagwdur5pu
evm               bafk2bzacec5ibmbtzuzjgwjmksm2n6zfq3gkicxqywwu7tsscqgdzajpfctxk
init              bafk2bzaced5sq72oemz6qwi6yssxwlos2g54zfprslrx5qfhhx2vlgsbvdpcs
multisig          bafk2bzacedbgei6jkx36fwdgvoohce4aghvpohqdhoco7p4thszgssms7olv2
paymentchannel    bafk2bzaceasmgmfsi4mjanxlowsub65fmevhzky4toeqbtw4kp6tmu4kxjpgq
placeholder       bafk2bzacedfvut2myeleyq67fljcrw4kkmn5pb5dpyozovj7jpoez5irnc3ro
reward            bafk2bzacedjyp6ll5ez27dfgldjj4tntxfvyp4pa5zkk7s5uhipzqjyx2gmuc
storagemarket     bafk2bzaceabolct6qdnefwcrtati2us3sxtxfghyqk6aamfhl6byyefmtssqi
storageminer      bafk2bzaceckzw3v7wqliyggvjvihz4wywchnnsie4frfvkm3fm5znb64mofri
storagepower      bafk2bzacea7t4wynzjajl442mpdqbnh3wusjusqtnzgpvefvweh4n2tgzgqhu
system            bafk2bzacedjnrb5glewazsxpcx6rwiuhl4kwrfcqolyprn6rrjtlzmthlhdq6
verifiedregistry  bafk2bzacednskl3bykz5qpo54z2j2p4q44t5of4ktd6vs6ymmg2zebsbxazkm

Migration

We are expecting a bit heavier than normal state migration for this upgrade due to the amount of state changes introduced with Direct Data Onboarding.

All node operators, including storage providers, should be aware that ONE pre-migration is being scheduled 120 epochs before the upgrade. It will take around 10-20 minutes for the pre-migration and less than 30 seconds for the final migration, depending on the amount of historical state in the node blockstore and the hardware specs the node is running on. During this time, expect slower block validation times, increased CPU and memory usage, and longer delays for API queries

We recommend node operators (who haven't enabled splitstore discard mode) that do not care about historical chain states, to prune the chain blockstore by syncing from a snapshot 1-2 days before the upgrade.

You can test out the migration by running running the benchmarking a network migration tutorial.

For certain node operators, such as full archival nodes or systems that need to keep large amounts of state (RPC providers), completing the pre-migration in time before the network upgrade might not be achievable. For those node operators, it is recommended to skip the pre-migration and run the non-cached migration (i.e., just running the migration at the exact upgrade epoch), and schedule for some downtime during the upgrade epoch. Operators of such nodes can read the How to disable premigration in network upgrade tutorial.

New features

Improvements

Tracing API

Replace the CodeCid field in the message trace (added in 1.23.4) with an InvokedActor field.

Before: 

{
    "Msg": {
        "From": ...,
        "To": ...,
        ...
        "CodeCid": ... // The actor's code CID.
    }
    "MsgRct": ...,
    "GasCharges": [],
    "Subcalls": [],
}

After: 

{
    "Msg": {
        "From": ...,
        "To": ...
    }
    "InvokedActor": {         // The invoked actor (ommitted if the actor wasn't invoked).
        "Id": 1234,           // The ID of the actor.
        "State": {            // The actor's state object (may change between network versions).
           "Code": ...,       // The actor's code CID.
           "Head": ...,       // The actor's state-root (when invoked).
           "CallSeqNum": ..., // The actor's nonce.
           "Balance": ...,    // The actor's balance (when invoked).
           "Address": ...,    // Delegated address (FEVM only).
        }
    }
    "MsgRct": ...,
    "GasCharges": [],
    "Subcalls": [],
}

This means the trace now contains an accurate "snapshot" of the actor at the time of the call, information that may not be present in the final state-tree (e.g., due to reverts). This will hopefully improve the performance and accuracy of indexing services.

Ethereum Tracing API (trace_block and trace_replayBlockTransactions)

For those with the Ethereum JSON-RPC API enabled, the experimental Ethereum Tracing API has been improved significantly and should be considered "functional". However, it's still new and should be tested extensively before relying on it. This API translates FVM traces to Ethereum-style traces, implementing the OpenEthereum trace_block and trace_replayBlockTransactions APIs.

This release fixes numerous bugs with this API and now ABI-encodes non-EVM inputs/outputs as if they were explicit EVM calls to handle_filecoin_method for better block explorer compatibility.

However, there are some significant limitations:

  1. The Geth APIs are not implemented, only the OpenEthereum (Erigon, etc.) APIs.
  2. Block rewards are not (yet) included in the trace.
  3. Selfdestruct operations are not included in the trace.
  4. EVM smart contract "create" events always specify 0xfe as the "code" for newly created EVM smart contracts.

Additionally, Filecoin is not Ethereum no matter how much we try to provide API/tooling compatibility. This API attempts to translate Filecoin semantics into Ethereum semantics as accurately as possible, but it's hardly the best source of data unless you need Filecoin to look like an Ethereum compatible chain. If you're trying to build a new integration with Filecoin, please use the native StateCompute method instead.

GetActorEvents and SubscribeActorEvents

FIP-0049 introduced Actor Events that can be emitted by user programmed actors. FIP-0083 introduces new events emitted by the builtin Verified Registry, Miner and Market Actors. These new events for builtin actors are being activated with network version 22 to coincide with Direct Data Onboarding as defined in FIP-0076 which introduces additional flexibility for data onboarding. Sector, Deal and DataCap lifecycles can be tracked with these events, providing visibility and options for programmatic responses to changes in state.

Actor events are available on message receipts, but can now be retrieved from a node using the new GetActorEvents and SubscribeActorEvents methods. These methods allow for querying and subscribing to actor events, respectively. They depend on the Lotus node both collecting events (with Fevm.Events.RealTimeFilterAPI and Fevm.Events.HistoricFilterAPI) and being enabled with the new configuration option Events.EnableActorEventsAPI. Note that a Lotus node can only respond to requests for historic events that it retains in its event store.

Both GetActorEvents and SubscribeActorEvents take a filter parameter which can optionally filter events on:

  • Addresses of the actor(s) emitting the event
  • Specific Fields within the event
  • FromHeight and ToHeight to filter events by block height
  • TipSetKey to restrict events contained within a specific tipset

GetActorEvents provides a one-time query for actor events, while SubscribeActorEvents provides a long-lived connection (via websockets) to the Lotus node, allowing for real-time updates on actor events. The subscription can be cancelled by the client at any time.

GetAllClaims and GetAllAlocations

Additionally the methods GetAllAllocations and GetAllClaims has been added to the Lotus API. These methods lists all the available allocations and claims available in the actor state.

Lotus CLI

The filplus commands used for listing allocations and claims have been updated. If no argument is provided to the either command, they will list out all the allocations and claims in the verified registry actor.
The output list columns have been modified to AllocationID and ClaimID instead of ID. 

lotus filplus list-allocations --help
NAME:
   lotus filplus list-allocations - List allocations available in verified registry actor or made by a client if specified

USAGE:
   lotus filplus list-allocations [command options] clientAddress

OPTIONS:
   --expired   list only expired allocations (default: false)
   --json      output results in json format (default: false)
   --help, -h  show help


lotus filplus list-claims --help     
NAME:
   lotus filplus list-claims - List claims available in verified registry actor or made by provider if specified

USAGE:
   lotus filplus list-claims [command options] providerAddress

OPTIONS:
   --expired   list only expired claims (default: false)
   --help, -h  show help

Dependencies

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