192 lines
3.8 KiB
Go
192 lines
3.8 KiB
Go
package events
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"go.opencensus.io/trace"
|
|
|
|
"github.com/filecoin-project/lotus/chain/types"
|
|
)
|
|
|
|
type heightEvents struct {
|
|
lk sync.Mutex
|
|
tsc *tipSetCache
|
|
gcConfidence uint64
|
|
|
|
ctr triggerId
|
|
|
|
heightTriggers map[triggerId]*heightHandler
|
|
|
|
htTriggerHeights map[triggerH][]triggerId
|
|
htHeights map[msgH][]triggerId
|
|
|
|
ctx context.Context
|
|
}
|
|
|
|
func (e *heightEvents) headChangeAt(rev, app []*types.TipSet) error {
|
|
ctx, span := trace.StartSpan(e.ctx, "events.HeightHeadChange")
|
|
defer span.End()
|
|
span.AddAttributes(trace.Int64Attribute("endHeight", int64(app[0].Height())))
|
|
span.AddAttributes(trace.Int64Attribute("reverts", int64(len(rev))))
|
|
span.AddAttributes(trace.Int64Attribute("applies", int64(len(app))))
|
|
|
|
for _, ts := range rev {
|
|
// TODO: log error if h below gcconfidence
|
|
// revert height-based triggers
|
|
|
|
revert := func(h uint64, ts *types.TipSet) {
|
|
for _, tid := range e.htHeights[h] {
|
|
ctx, span := trace.StartSpan(ctx, "events.HeightRevert")
|
|
|
|
err := e.heightTriggers[tid].revert(ctx, ts)
|
|
e.heightTriggers[tid].called = false
|
|
|
|
span.End()
|
|
|
|
if err != nil {
|
|
log.Errorf("reverting chain trigger (@H %d): %s", h, err)
|
|
}
|
|
}
|
|
}
|
|
revert(ts.Height(), ts)
|
|
|
|
subh := ts.Height() - 1
|
|
for {
|
|
cts, err := e.tsc.get(subh)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if cts != nil {
|
|
break
|
|
}
|
|
|
|
revert(subh, ts)
|
|
subh--
|
|
}
|
|
|
|
if err := e.tsc.revert(ts); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
for i := range app {
|
|
ts := app[i]
|
|
|
|
if err := e.tsc.add(ts); err != nil {
|
|
return err
|
|
}
|
|
|
|
// height triggers
|
|
|
|
apply := func(h uint64, ts *types.TipSet) error {
|
|
for _, tid := range e.htTriggerHeights[h] {
|
|
hnd := e.heightTriggers[tid]
|
|
if hnd.called {
|
|
return nil
|
|
}
|
|
hnd.called = true
|
|
|
|
triggerH := h - uint64(hnd.confidence)
|
|
|
|
incTs, err := e.tsc.getNonNull(triggerH)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ctx, span := trace.StartSpan(ctx, "events.HeightApply")
|
|
span.AddAttributes(trace.BoolAttribute("immediate", false))
|
|
|
|
err = hnd.handle(ctx, incTs, h)
|
|
span.End()
|
|
|
|
if err != nil {
|
|
log.Errorf("chain trigger (@H %d, called @ %d) failed: %+v", triggerH, ts.Height(), err)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
if err := apply(ts.Height(), ts); err != nil {
|
|
return err
|
|
}
|
|
subh := ts.Height() - 1
|
|
for {
|
|
cts, err := e.tsc.get(subh)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if cts != nil {
|
|
break
|
|
}
|
|
|
|
if err := apply(subh, ts); err != nil {
|
|
return err
|
|
}
|
|
|
|
subh--
|
|
}
|
|
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ChainAt invokes the specified `HeightHandler` when the chain reaches the
|
|
// specified height+confidence threshold. If the chain is rolled-back under the
|
|
// specified height, `RevertHandler` will be called.
|
|
//
|
|
// ts passed to handlers is the tipset at the specified, or above, if lower tipsets were null
|
|
func (e *heightEvents) ChainAt(hnd HeightHandler, rev RevertHandler, confidence int, h uint64) error {
|
|
|
|
e.lk.Lock() // Tricky locking, check your locks if you modify this function!
|
|
|
|
bestH := e.tsc.best().Height()
|
|
|
|
if bestH >= h+uint64(confidence) {
|
|
ts, err := e.tsc.getNonNull(h)
|
|
if err != nil {
|
|
log.Warnf("events.ChainAt: calling HandleFunc with nil tipset, not found in cache: %s", err)
|
|
}
|
|
|
|
e.lk.Unlock()
|
|
ctx, span := trace.StartSpan(e.ctx, "events.HeightApply")
|
|
span.AddAttributes(trace.BoolAttribute("immediate", true))
|
|
|
|
err = hnd(ctx, ts, bestH)
|
|
span.End()
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
e.lk.Lock()
|
|
bestH = e.tsc.best().Height()
|
|
}
|
|
|
|
defer e.lk.Unlock()
|
|
|
|
if bestH >= h+uint64(confidence)+e.gcConfidence {
|
|
return nil
|
|
}
|
|
|
|
triggerAt := h + uint64(confidence)
|
|
|
|
id := e.ctr
|
|
e.ctr++
|
|
|
|
e.heightTriggers[id] = &heightHandler{
|
|
confidence: confidence,
|
|
|
|
handle: hnd,
|
|
revert: rev,
|
|
}
|
|
|
|
e.htHeights[h] = append(e.htHeights[h], id)
|
|
e.htTriggerHeights[triggerAt] = append(e.htTriggerHeights[triggerAt], id)
|
|
|
|
return nil
|
|
}
|