feat: stable block time #2422
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feat: stable block time #2422
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copied from berachain#2280 * [PBTS](https://docs.cometbft.com/v1.0/explanation/core/proposer-based-timestamps) is used, which can't be attacked by 1/3+ of malicious validators (time warp attack). * `InitialTime` (genesis time) is persisted across restarts to preserve the desired block cadence. The algorithm is as follows (assuming the target block cadence (configurable) is 2s): ```go targetBlockTime = InitialTime + 2s * blockHeight if actualBlockTime >= targetBlockTime { ABCI.FinalizeBlockResponse.NextBlockDelay = 0 } else { ABCI.FinalizeBlockResponse.NextBlockDelay = targetBlockTime - actualBlockTime } ```
abi87
reviewed
Jan 27, 2025
| func SetTargetBlockTime[ | ||
| LoggerT log.AdvancedLogger[LoggerT], | ||
| ](t time.Duration) func(*Service[LoggerT]) { | ||
| return func(bs *Service[LoggerT]) { bs.setTargetBlockTime(t) } |
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note that we do enforce some floor on timeouts in
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Makes sense. I will factor this in.
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It is unclear to me how to do it from the API perspective. Do you have any suggestions @abi87?
Signed-off-by: Anton Kaliaev <[email protected]>
melekes
commented
Jan 31, 2025
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| // ToBytes converts the blockDelay to bytes. | ||
| func (d *blockDelay) ToBytes() []byte { | ||
| bz, err := json.Marshal(d) |
melekes
commented
Jan 31, 2025
alesforz
approved these changes
Jan 31, 2025
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InitialTimeInitialTimeto the latest block time if the network doesn't commit a block (any block because of downtime) for a configurable period of timeNextBlockDelayfeat: stable block time #2422 (comment)