96 lines
1.9 KiB
Go
96 lines
1.9 KiB
Go
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package store
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import (
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"github.com/filecoin-project/go-lotus/chain/types"
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)
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func (e *Events) headChangeAt(rev, app []*types.TipSet) error {
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// highest tipset is always the first (see cs.ReorgOps)
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newH := app[0].Height()
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for _, ts := range rev {
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// TODO: log error if h below gcconfidence
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// revert height-based triggers
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for _, tid := range e.htHeights[ts.Height()] {
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// don't revert if newH is above this ts
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if newH >= ts.Height() {
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continue
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}
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err := e.heightTriggers[tid].revert(ts)
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if err != nil {
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log.Errorf("reverting chain trigger (@H %d): %s", ts.Height(), err)
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}
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}
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if err := e.tsc.revert(ts); err != nil {
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return err
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}
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}
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for _, ts := range app {
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if err := e.tsc.add(ts); err != nil {
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return err
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}
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// height triggers
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for _, tid := range e.htTriggerHeights[ts.Height()] {
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hnd := e.heightTriggers[tid]
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triggerH := ts.Height() - uint64(hnd.confidence)
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incTs, err := e.tsc.get(triggerH)
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if err != nil {
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return err
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}
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if err := hnd.handle(incTs, ts.Height()); err != nil {
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msgInfo := ""
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log.Errorf("chain trigger (%s@H %d, called @ %d) failed: %s", msgInfo, triggerH, ts.Height(), err)
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}
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}
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}
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return nil
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}
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func (e *Events) ChainAt(hnd HeightHandler, rev RevertHandler, confidence int, h uint64) error {
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e.lk.Lock()
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defer e.lk.Unlock()
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bestH := e.tsc.best().Height()
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if bestH >= h+uint64(confidence) {
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ts, err := e.tsc.get(h)
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if err != nil {
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log.Warnf("events.ChainAt: calling HandleFunc with nil tipset, not found in cache: %s", err)
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}
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if err := hnd(ts, bestH); err != nil {
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return err
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}
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}
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if bestH >= h+uint64(confidence)+e.gcConfidence {
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return nil
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}
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triggerAt := h + uint64(confidence)
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id := e.ctr
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e.ctr++
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e.heightTriggers[id] = &heightHandler{
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confidence: confidence,
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handle: hnd,
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revert: rev,
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}
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e.htHeights[h] = append(e.htHeights[h], id)
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e.htTriggerHeights[triggerAt] = append(e.htTriggerHeights[triggerAt], id)
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return nil
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}
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