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67 lines
2.0 KiB
67 lines
2.0 KiB
// Copyright 2024 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package miner
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import (
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/common"
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)
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// pendingTTL indicates the period of time a generated pending block should
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// exist to serve RPC requests before being discarded if the parent block
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// has not changed yet. The value is chosen to align with the recommit interval.
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const pendingTTL = 2 * time.Second
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// pending wraps a pending block with additional metadata.
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type pending struct {
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created time.Time
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parentHash common.Hash
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result *newPayloadResult
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lock sync.Mutex
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}
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// resolve retrieves the cached pending result if it's available. Nothing will be
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// returned if the parentHash is not matched or the result is already too old.
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//
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// Note, don't modify the returned payload result.
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func (p *pending) resolve(parentHash common.Hash) *newPayloadResult {
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p.lock.Lock()
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defer p.lock.Unlock()
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if p.result == nil {
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return nil
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}
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if parentHash != p.parentHash {
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return nil
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}
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if time.Since(p.created) > pendingTTL {
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return nil
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}
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return p.result
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}
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// update refreshes the cached pending block with newly created one.
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func (p *pending) update(parent common.Hash, result *newPayloadResult) {
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p.lock.Lock()
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defer p.lock.Unlock()
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p.parentHash = parent
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p.result = result
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p.created = time.Now()
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}
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