45 lines
1.4 KiB
Go
45 lines
1.4 KiB
Go
package parlia
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import (
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"math/rand"
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"time"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/core/types"
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)
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const (
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wiggleTimeBeforeFork = 500 * time.Millisecond // Random delay (per signer) to allow concurrent signers
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fixedBackOffTimeBeforeFork = 200 * time.Millisecond
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)
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func (p *Parlia) delayForRamanujanFork(snap *Snapshot, header *types.Header) time.Duration {
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delay := time.Until(time.Unix(int64(header.Time), 0)) // nolint: gosimple
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if p.chainConfig.IsRamanujan(header.Number) {
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return delay
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}
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if header.Difficulty.Cmp(diffNoTurn) == 0 {
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// It's not our turn explicitly to sign, delay it a bit
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wiggle := time.Duration(len(snap.Validators)/2+1) * wiggleTimeBeforeFork
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delay += fixedBackOffTimeBeforeFork + time.Duration(rand.Int63n(int64(wiggle)))
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}
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return delay
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}
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func (p *Parlia) blockTimeForRamanujanFork(snap *Snapshot, header, parent *types.Header) uint64 {
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blockTime := parent.Time + p.config.Period
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if p.chainConfig.IsRamanujan(header.Number) {
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blockTime = blockTime + p.backOffTime(snap, header, p.val)
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}
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return blockTime
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}
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func (p *Parlia) blockTimeVerifyForRamanujanFork(snap *Snapshot, header, parent *types.Header) error {
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if p.chainConfig.IsRamanujan(header.Number) {
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if header.Time < parent.Time+p.config.Period+p.backOffTime(snap, header, header.Coinbase) {
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return consensus.ErrFutureBlock
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}
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}
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return nil
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}
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