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91 lines
4.1 KiB
Markdown
91 lines
4.1 KiB
Markdown
# Kava-5 Upgrade Instructions
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## Software Version and Key Dates
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* The version of Kava for kava-5 is v0.13.1
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* Kava-4 validators should prepare to shutdown their nodes March 4th, 2021 at 13:00 UTC
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* Kava-5 genesis time is set to March 4th, 2021 at 15:00 UTC
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* The version of cosmos-sdk for kava-5 is v0.39.2
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* The version of tendermint for kava-5 v0.33.9
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* The minimum version of golang for kava-5 is 1.13+, 1.15+ has been tested and is recommended.
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### Risks
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As a validator, performing the upgrade procedure on your consensus nodes carries a heightened risk of double-signing and being slashed. The most important piece of this procedure is verifying your software version and genesis file hash before starting your validator and signing.
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The riskiest thing a validator can do is discover that they made a mistake and repeat the upgrade procedure again during the network startup. If you discover a mistake in the process, the best thing to do is wait for the network to start before correcting it. If the network is halted and you have started with a different genesis file than the expected one, seek advice from a Kava developer before resetting your validator.
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### Recovery
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Prior to exporting kava-4 state, validators are encouraged to take a full data snapshot at the export height before proceeding. Snap-shotting depends heavily on infrastructure, but generally this can be done by backing up the .kvd and .kvcli directories.
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It is critically important to back-up the .kvd/data/priv_validator_state.json file after stopping your kvd process. This file is updated every block as your validator participates in consensus rounds. It is a critical file needed to prevent double-signing, in case the upgrade fails and the previous chain needs to be restarted.
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In the event that the upgrade does not succeed, validators and operators must downgrade back to v0.12.2 of the Kava software and restore to their latest snapshot before restarting their nodes.
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## Upgrade Procedure
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### Before the upgrade
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Set your node to produce the final block of kava-4 at __13:00__ UTC March 4th, 2021. To restart your node with that stop time,
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```sh
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kvd start --halt-time 1614862800
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```
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You can safely set the halt-time flag at any time.
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### On the day of the upgrade
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__The kava chain is expected to halt at 13:00 UTC, and restart with new software at 15:00 UTC March 4th. Do not stop your node and begin the upgrade before 13:00UTC on March 4th, or you may go offline and be unable to recover until after the upgrade!__
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Kava developers will update this PR with the final block number when it is reached. __Make sure the kvd process is stopped before proceeding and that you have backed up your validator__. Failure to backup your validator could make it impossible to restart your node if the upgrade fails.
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1. Export State (this __MUST__ be done using __v0.12.2__, previous v0.12.x versions will not produce the same genesis hash!)
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```sh
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kvd export --for-zero-height --height 1267330 > export-genesis.json
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```
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__Note:__ This can take a while!
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2. Update to kava-5
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```sh
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# in the `kava` folder
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git pull
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git checkout v0.13.1
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make install
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# verify versions
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kvd version --long
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# name: kava
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# server_name: kvd
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# client_name: kvcli
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# version: 0.13.1
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# commit: 203d7e0063555166808fd560092e6cf64ac19117
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# build_tags: netgo,ledger
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# go: go version go1.15.8 linux/amd64
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# Migrate genesis state
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kvd migrate export-genesis.json > genesis.json
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# Verify output of genesis migration
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kvd validate-genesis genesis.json # should say it's valid
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jq -S -c -M '' genesis.json | shasum -a 256
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# 5200ab3b16fe6100a67c707688f10e3ee9affeda93a4b472b9bf40faafdd5dc0
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# Restart node with migrated genesis state
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cp genesis.json ~/.kvd/config/genesis.json
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kvd unsafe-reset-all
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# Restart node -
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# ! Be sure to remove --halt-time flag if it is set in systemd/docker
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kvd start
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```
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### Coordination
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If the kava-5 chain does not launch by March 4, 2021 at 17:00 UTC, the launch should be considered a failure. Validators should restore the state from kava-4 and coordinate a relaunch. In the event of launch failure, coordination will occur in the [Kava discord](https://discord.com/invite/kQzh3Uv).
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