68 lines
2.2 KiB
Go
68 lines
2.2 KiB
Go
package events
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import (
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"context"
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"github.com/ipfs/go-cid"
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logging "github.com/ipfs/go-log/v2"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/filecoin-project/lotus/api"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/chain/types"
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)
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var log = logging.Logger("events")
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// HeightHandler `curH`-`ts.Height` = `confidence`
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type (
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HeightHandler func(ctx context.Context, ts *types.TipSet, curH abi.ChainEpoch) error
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RevertHandler func(ctx context.Context, ts *types.TipSet) error
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)
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// A TipSetObserver receives notifications of tipsets
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type TipSetObserver interface {
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Apply(ctx context.Context, from, to *types.TipSet) error
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Revert(ctx context.Context, from, to *types.TipSet) error
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}
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type EventAPI interface {
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ChainNotify(context.Context) (<-chan []*api.HeadChange, error)
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ChainGetBlockMessages(context.Context, cid.Cid) (*api.BlockMessages, error)
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ChainGetTipSetByHeight(context.Context, abi.ChainEpoch, types.TipSetKey) (*types.TipSet, error)
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ChainGetTipSetAfterHeight(context.Context, abi.ChainEpoch, types.TipSetKey) (*types.TipSet, error)
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ChainHead(context.Context) (*types.TipSet, error)
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StateSearchMsg(ctx context.Context, from types.TipSetKey, msg cid.Cid, limit abi.ChainEpoch, allowReplaced bool) (*api.MsgLookup, error)
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ChainGetTipSet(context.Context, types.TipSetKey) (*types.TipSet, error)
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ChainGetPath(ctx context.Context, from, to types.TipSetKey) ([]*api.HeadChange, error)
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StateGetActor(ctx context.Context, actor address.Address, tsk types.TipSetKey) (*types.Actor, error) // optional / for CalledMsg
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}
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type Events struct {
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*observer
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*heightEvents
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*hcEvents
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}
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func NewEventsWithConfidence(ctx context.Context, api EventAPI, gcConfidence abi.ChainEpoch) (*Events, error) {
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cache := newCache(api, gcConfidence)
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ob := newObserver(cache, gcConfidence)
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if err := ob.start(ctx); err != nil {
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return nil, err
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}
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he := newHeightEvents(cache, ob, gcConfidence)
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headChange := newHCEvents(cache, ob)
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return &Events{ob, he, headChange}, nil
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}
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func NewEvents(ctx context.Context, api EventAPI) (*Events, error) {
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gcConfidence := 2 * build.ForkLengthThreshold
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return NewEventsWithConfidence(ctx, api, gcConfidence)
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}
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