forked from cerc-io/plugeth
les/checkpointoracle: don't lookup checkpoint more than once per minute (#21285)
* les/checkpointoracle: don't lookup checkpoint more than once per second * les/checkpoint/oracle: change oracle checktime to 1 minute
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@ -21,7 +21,9 @@ package checkpointoracle
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import (
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"encoding/binary"
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"sync"
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"sync/atomic"
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"time"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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@ -40,6 +42,11 @@ type CheckpointOracle struct {
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running int32 // Flag whether the contract backend is set or not
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getLocal func(uint64) params.TrustedCheckpoint // Function used to retrieve local checkpoint
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checkMu sync.Mutex // Mutex to sync access to the fields below
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lastCheckTime time.Time // Time we last checked the checkpoint
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lastCheckPoint *params.TrustedCheckpoint // The last stable checkpoint
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lastCheckPointHeight uint64 // The height of last stable checkpoint
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}
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// New creates a checkpoint oracle handler with given configs and callback.
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@ -88,6 +95,12 @@ func (oracle *CheckpointOracle) Contract() *checkpointoracle.CheckpointOracle {
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// StableCheckpoint returns the stable checkpoint which was generated by local
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// indexers and announced by trusted signers.
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func (oracle *CheckpointOracle) StableCheckpoint() (*params.TrustedCheckpoint, uint64) {
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oracle.checkMu.Lock()
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defer oracle.checkMu.Unlock()
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if time.Since(oracle.lastCheckTime) < 1*time.Minute {
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return oracle.lastCheckPoint, oracle.lastCheckPointHeight
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}
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// Look it up properly
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// Retrieve the latest checkpoint from the contract, abort if empty
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latest, hash, height, err := oracle.contract.Contract().GetLatestCheckpoint(nil)
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if err != nil || (latest == 0 && hash == [32]byte{}) {
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@ -103,6 +116,9 @@ func (oracle *CheckpointOracle) StableCheckpoint() (*params.TrustedCheckpoint, u
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//
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// In both cases, no stable checkpoint will be returned.
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if local.HashEqual(hash) {
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oracle.lastCheckTime = time.Now()
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oracle.lastCheckPointHeight = height.Uint64()
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oracle.lastCheckPoint = &local
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return &local, height.Uint64()
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}
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return nil, 0
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