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Кирилл
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Apr 17, 2024
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57 changes: 6 additions & 51 deletions
57
src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/HeadLivenessValidator.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,59 +1,14 @@ | ||
| package io.emeraldpay.dshackle.upstream.ethereum | ||
|
|
||
| import io.emeraldpay.dshackle.ThrottledLogger | ||
| import io.emeraldpay.dshackle.upstream.Head | ||
| import org.slf4j.LoggerFactory | ||
| import reactor.core.publisher.Flux | ||
| import reactor.core.scheduler.Scheduler | ||
| import java.time.Duration | ||
|
|
||
| class HeadLivenessValidator( | ||
| private val head: Head, | ||
| private val expectedBlockTime: Duration, | ||
| private val scheduler: Scheduler, | ||
| private val upstreamId: String, | ||
| ) { | ||
| companion object { | ||
| const val CHECKED_BLOCKS_UNTIL_LIVE = 3 | ||
| private val log = LoggerFactory.getLogger(HeadLivenessValidator::class.java) | ||
| } | ||
| interface HeadLivenessValidator { | ||
| fun getFlux(): Flux<Boolean> | ||
| } | ||
|
|
||
| fun getFlux(): Flux<Boolean> { | ||
| val headLiveness = head.headLiveness() | ||
| // first we have moving window of 2 blocks and check that they are consecutive ones | ||
| val headFlux = head.getFlux().map { it.height }.buffer(2, 1).map { | ||
| it.last() - it.first() == 1L | ||
| }.scan(Pair(0, true)) { acc, value -> | ||
| // then we accumulate consecutive true events, false resets counter | ||
| if (value) { | ||
| Pair(acc.first + 1, true) | ||
| } else { | ||
| if (log.isDebugEnabled) { | ||
| log.debug("non consecutive blocks in head for $upstreamId") | ||
| } else { | ||
| ThrottledLogger.log(log, "non consecutive blocks in head for $upstreamId") | ||
| } | ||
| Pair(0, false) | ||
| } | ||
| }.flatMap { (count, value) -> | ||
| // we emit when we have false or checked CHECKED_BLOCKS_UNTIL_LIVE blocks | ||
| // CHECKED_BLOCKS_UNTIL_LIVE blocks == (CHECKED_BLOCKS_UNTIL_LIVE - 1) consecutive true | ||
| when { | ||
| count >= (CHECKED_BLOCKS_UNTIL_LIVE - 1) -> Flux.just(true) | ||
| !value -> Flux.just(false) | ||
| else -> Flux.empty() | ||
| } | ||
| }.timeout( | ||
| expectedBlockTime.multipliedBy(CHECKED_BLOCKS_UNTIL_LIVE.toLong() * 2), | ||
| Flux.just(false).doOnNext { | ||
| if (log.isDebugEnabled) { | ||
| log.debug("head liveness check broken with timeout in $upstreamId") | ||
| } else { | ||
| ThrottledLogger.log(log, "head liveness check broken with timeout in $upstreamId") | ||
| } | ||
| }, | ||
| ).repeat().subscribeOn(scheduler) | ||
| class NoHeadLivenessValidator : HeadLivenessValidator { | ||
|
|
||
| return Flux.merge(headFlux, headLiveness) | ||
| override fun getFlux(): Flux<Boolean> { | ||
| return Flux.just(false) | ||
| } | ||
| } |
59 changes: 59 additions & 0 deletions
59
src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/HeadLivenessValidatorImpl.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package io.emeraldpay.dshackle.upstream.ethereum | ||
|
|
||
| import io.emeraldpay.dshackle.ThrottledLogger | ||
| import io.emeraldpay.dshackle.upstream.Head | ||
| import org.slf4j.LoggerFactory | ||
| import reactor.core.publisher.Flux | ||
| import reactor.core.scheduler.Scheduler | ||
| import java.time.Duration | ||
|
|
||
| class HeadLivenessValidatorImpl( | ||
| private val head: Head, | ||
| private val expectedBlockTime: Duration, | ||
| private val scheduler: Scheduler, | ||
| private val upstreamId: String, | ||
| ) : HeadLivenessValidator { | ||
| companion object { | ||
| const val CHECKED_BLOCKS_UNTIL_LIVE = 3 | ||
| private val log = LoggerFactory.getLogger(HeadLivenessValidatorImpl::class.java) | ||
| } | ||
|
|
||
| override fun getFlux(): Flux<Boolean> { | ||
| val headLiveness = head.headLiveness() | ||
| // first we have moving window of 2 blocks and check that they are consecutive ones | ||
| val headFlux = head.getFlux().map { it.height }.buffer(2, 1).map { | ||
| it.last() - it.first() == 1L | ||
| }.scan(Pair(0, true)) { acc, value -> | ||
| // then we accumulate consecutive true events, false resets counter | ||
| if (value) { | ||
| Pair(acc.first + 1, true) | ||
| } else { | ||
| if (log.isDebugEnabled) { | ||
| log.debug("non consecutive blocks in head for $upstreamId") | ||
| } else { | ||
| ThrottledLogger.log(log, "non consecutive blocks in head for $upstreamId") | ||
| } | ||
| Pair(0, false) | ||
| } | ||
| }.flatMap { (count, value) -> | ||
| // we emit when we have false or checked CHECKED_BLOCKS_UNTIL_LIVE blocks | ||
| // CHECKED_BLOCKS_UNTIL_LIVE blocks == (CHECKED_BLOCKS_UNTIL_LIVE - 1) consecutive true | ||
| when { | ||
| count >= (CHECKED_BLOCKS_UNTIL_LIVE - 1) -> Flux.just(true) | ||
| !value -> Flux.just(false) | ||
| else -> Flux.empty() | ||
| } | ||
| }.timeout( | ||
| expectedBlockTime.multipliedBy(CHECKED_BLOCKS_UNTIL_LIVE.toLong() * 2), | ||
| Flux.just(false).doOnNext { | ||
| if (log.isDebugEnabled) { | ||
| log.debug("head liveness check broken with timeout in $upstreamId") | ||
| } else { | ||
| ThrottledLogger.log(log, "head liveness check broken with timeout in $upstreamId") | ||
| } | ||
| }, | ||
| ).repeat().subscribeOn(scheduler) | ||
|
|
||
| return Flux.merge(headFlux, headLiveness) | ||
| } | ||
| } |
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