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84 lines
2.3 KiB
84 lines
2.3 KiB
package evidence
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import (
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"github.com/tendermint/tmlibs/log"
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"github.com/tendermint/tendermint/types"
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)
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// EvidencePool maintains a pool of valid evidence
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// in an EvidenceStore.
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type EvidencePool struct {
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params types.EvidenceParams
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logger log.Logger
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state types.State // TODO: update this on commit!
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evidenceStore *EvidenceStore
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// never close
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evidenceChan chan types.Evidence
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}
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func NewEvidencePool(params types.EvidenceParams, evidenceStore *EvidenceStore, state types.State) *EvidencePool {
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evpool := &EvidencePool{
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params: params,
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logger: log.NewNopLogger(),
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evidenceStore: evidenceStore,
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state: state,
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evidenceChan: make(chan types.Evidence),
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}
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return evpool
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}
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// SetLogger sets the Logger.
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func (evpool *EvidencePool) SetLogger(l log.Logger) {
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evpool.logger = l
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}
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// EvidenceChan returns an unbuffered channel on which new evidence can be received.
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func (evpool *EvidencePool) EvidenceChan() <-chan types.Evidence {
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return evpool.evidenceChan
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}
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// PriorityEvidence returns the priority evidence.
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func (evpool *EvidencePool) PriorityEvidence() []types.Evidence {
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return evpool.evidenceStore.PriorityEvidence()
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}
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// PendingEvidence returns all uncommitted evidence.
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func (evpool *EvidencePool) PendingEvidence() []types.Evidence {
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return evpool.evidenceStore.PendingEvidence()
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}
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// AddEvidence checks the evidence is valid and adds it to the pool.
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// Blocks on the EvidenceChan.
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func (evpool *EvidencePool) AddEvidence(evidence types.Evidence) (err error) {
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// TODO: check if we already have evidence for this
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// validator at this height so we dont get spammed
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priority, err := evpool.state.VerifyEvidence(evidence)
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if err != nil {
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// TODO: if err is just that we cant find it cuz we pruned, ignore.
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// TODO: if its actually bad evidence, punish peer
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return err
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}
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added := evpool.evidenceStore.AddNewEvidence(evidence, priority)
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if !added {
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// evidence already known, just ignore
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return
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}
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evpool.logger.Info("Verified new evidence of byzantine behaviour", "evidence", evidence)
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// never closes. always safe to send on
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evpool.evidenceChan <- evidence
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return nil
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}
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// MarkEvidenceAsCommitted marks all the evidence as committed.
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func (evpool *EvidencePool) MarkEvidenceAsCommitted(evidence []types.Evidence) {
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for _, ev := range evidence {
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evpool.evidenceStore.MarkEvidenceAsCommitted(ev)
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}
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}
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