forked from iotaledger/goshimmer
/
tipsconflicttracker.go
120 lines (95 loc) · 3.19 KB
/
tipsconflicttracker.go
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package mesh_old
import (
"sync"
"github.com/cockroachdb/errors"
"github.com/izuc/zipp.foundation/core/generics/event"
"github.com/izuc/zipp.foundation/core/generics/set"
"github.com/izuc/zipp/packages/core/conflictdag"
"github.com/izuc/zipp/packages/core/ledger/utxo"
)
type TipsConflictTracker struct {
missingConflicts utxo.TransactionIDs
tipsConflictCount map[utxo.TransactionID]int
mesh *Mesh
sync.RWMutex
}
func NewTipsConflictTracker(mesh *Mesh) *TipsConflictTracker {
return &TipsConflictTracker{
missingConflicts: set.NewAdvancedSet[utxo.TransactionID](),
tipsConflictCount: make(map[utxo.TransactionID]int),
mesh: mesh,
}
}
func (c *TipsConflictTracker) Setup() {
c.mesh.Ledger.ConflictDAG.Events.ConflictAccepted.Attach(event.NewClosure(func(event *conflictdag.ConflictAcceptedEvent[utxo.TransactionID]) {
c.deleteConflict(event.ID)
}))
c.mesh.Ledger.ConflictDAG.Events.ConflictRejected.Attach(event.NewClosure(func(event *conflictdag.ConflictRejectedEvent[utxo.TransactionID]) {
c.deleteConflict(event.ID)
}))
}
func (c *TipsConflictTracker) AddTip(blockID BlockID) {
blockConflictIDs, err := c.mesh.Booker.BlockConflictIDs(blockID)
if err != nil {
panic(err)
}
c.Lock()
defer c.Unlock()
for it := blockConflictIDs.Iterator(); it.HasNext(); {
conflictID := it.Next()
if !c.mesh.Ledger.ConflictDAG.ConfirmationState(set.NewAdvancedSet(conflictID)).IsPending() {
continue
}
if c.tipsConflictCount[conflictID]++; c.tipsConflictCount[conflictID] == 1 {
c.missingConflicts.Delete(conflictID)
}
}
}
func (c *TipsConflictTracker) RemoveTip(blockID BlockID) {
blockConflictIDs, err := c.mesh.Booker.BlockConflictIDs(blockID)
if err != nil {
panic("could not determine ConflictIDs of tip.")
}
c.Lock()
defer c.Unlock()
for it := blockConflictIDs.Iterator(); it.HasNext(); {
conflictID := it.Next()
if _, exists := c.tipsConflictCount[conflictID]; !exists {
continue
}
if !c.mesh.Ledger.ConflictDAG.ConfirmationState(set.NewAdvancedSet(conflictID)).IsPending() {
continue
}
if c.tipsConflictCount[conflictID]--; c.tipsConflictCount[conflictID] == 0 {
c.missingConflicts.Add(conflictID)
delete(c.tipsConflictCount, conflictID)
}
}
}
func (c *TipsConflictTracker) MissingConflicts(amount int) (missingConflicts utxo.TransactionIDs) {
c.Lock()
defer c.Unlock()
missingConflicts = utxo.NewTransactionIDs()
_ = c.missingConflicts.ForEach(func(conflictID utxo.TransactionID) (err error) {
// TODO: this should not be necessary if ConflictAccepted/ConflictRejected events are fired appropriately
if !c.mesh.Ledger.ConflictDAG.ConfirmationState(set.NewAdvancedSet(conflictID)).IsPending() {
c.missingConflicts.Delete(conflictID)
delete(c.tipsConflictCount, conflictID)
return
}
if !c.mesh.OMVConsensusManager.ConflictLiked(conflictID) {
return
}
if missingConflicts.Add(conflictID) && missingConflicts.Size() == amount {
return errors.Errorf("amount of missing conflicts reached %d", amount)
}
return nil
})
return missingConflicts
}
func (c *TipsConflictTracker) deleteConflict(id utxo.TransactionID) {
c.Lock()
defer c.Unlock()
c.missingConflicts.Delete(id)
delete(c.tipsConflictCount, id)
}