Ethash¶

	Source (upstream pre-purge)	Current
File	`consensus/ethash/ethash.go`	`ethash.go`
Symbol	`Ethash`	`Ethash`
Ref	`dde2da0ef~1`	`etc/v1.17.3-full-node`

ADAPT: hashrate field: metrics.Meter → *metrics.Meter (#28035)

3-way merge — purge → getc ← upstream¶

pre-purgecommon≈ adapted (origin inferred by similarity)

// Ethash is a consensus engine based on proof-of-work implementing the ethash

// algorithm.

type Ethash struct {

↗ config Config

↗ caches *lru[*cache] // In memory caches to avoid regenerating too often

datasets *lru[*dataset] // In memory datasets to avoid regenerating too often

↗ // Mining related fields

≈ rand *rand.Rand // Properly seeded random source for nonces

threads int // Number of threads to mine on if mining

update chan struct{} // Notification channel to update mining parameters

hashrate *metrics.Meter // Meter tracking the average hashrate

↗ remote *remoteSealer

↗ // The fields below are hooks for testing

shared *Ethash // Shared PoW verifier to avoid cache regeneration

fakeFail uint64 // Block number which fails PoW check even in fake mode

fakeDelay time.Duration // Time delay to sleep for before returning from verify

↗ lock sync.Mutex // Ensures thread safety for the in-memory caches and mining fields

closeOnce sync.Once // Ensures exit channel will not be closed twice.

}

core-geth validation — +1 -1

| | | |---|---| | File | [`ethash.go`](https://github.com/etclabscore/core-geth/blob/v1.12.20/consensus/ethash/ethash.go) | | Symbol | `Ethash` | | Ref | `v1.12.20` |

--- a/core-geth/consensus/ethash/ethash.go
+++ b/etc/consensus/ethash/ethash.go
@@ -10,7 +10,7 @@
    rand     *rand.Rand    // Properly seeded random source for nonces
    threads  int           // Number of threads to mine on if mining
    update   chan struct{} // Notification channel to update mining parameters
-   hashrate metrics.Meter // Meter tracking the average hashrate
+   hashrate *metrics.Meter // Meter tracking the average hashrate
    remote   *remoteSealer

    // The fields below are hooks for testing

← Consensus & Ethash