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core: improve readability of the fork choice logic (#2658)

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buddho 2024-08-20 23:06:49 +08:00 committed by GitHub
parent 5d19f2182b
commit 3bd9a2395c
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1 changed files with 13 additions and 6 deletions
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17
core/forkchoice.go
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@ -121,12 +121,19 @@ func (f *ForkChoice) ReorgNeeded(current *types.Header, extern *types.Header) (b
if f.preserve != nil {
currentPreserve, externPreserve = f.preserve(current), f.preserve(extern)
}
choiceRules := func() bool {
if extern.Time == current.Time {
doubleSign := (extern.Coinbase == current.Coinbase)
reorg = !currentPreserve && (externPreserve ||
extern.Time < current.Time ||
extern.Time == current.Time &&
((doubleSign && extern.Hash().Cmp(current.Hash()) < 0) ||
(!doubleSign && f.rand.Float64() < 0.5)))
if doubleSign {
return extern.Hash().Cmp(current.Hash()) < 0
} else {
return f.rand.Float64() < 0.5
}
} else {
return extern.Time < current.Time
}
}
reorg = !currentPreserve && (externPreserve || choiceRules())
}
return reorg, nil
}