fsm

type Chain interface {
	ChainHead(ctx context.Context) (TipSetToken, abi.ChainEpoch, error)
	StateNetworkVersion(ctx context.Context, tok TipSetToken) (network.Version, error)
}

type DealInfo struct {
	PublishCid   *cid.Cid
	DealID       abi.DealID
	DealSchedule DealSchedule
	KeepUnsealed bool
}

type DealSchedule struct {
	StartEpoch abi.ChainEpoch
	EndEpoch   abi.ChainEpoch
}

type Events interface {
	ChainAt(hnd HeightHandler, rev RevertHandler, confidence int, h abi.ChainEpoch) error
}

type HeightHandler func(ctx context.Context, tok TipSetToken, curH abi.ChainEpoch) error

type Log struct {
	Timestamp uint64
	Trace     string // for errors

	Message string

	// additional data (Event info)
	Kind string
}

type MessageReceipt struct {
	ExitCode exitcode.ExitCode
	Return   []byte
	GasUsed  int64
}

type MsgLookup struct {
	Receipt   MessageReceipt
	TipSetTok TipSetToken
	Height    abi.ChainEpoch
}

type Piece struct {
	Piece    abi.PieceInfo
	DealInfo *DealInfo // nil for pieces which do not appear in deals (e.g. filler pieces)
}

type PieceWithDealInfo struct {
	Piece    abi.PieceInfo
	DealInfo DealInfo
}

type ReturnState string

type RevertHandler func(ctx context.Context, tok TipSetToken) error

type TipSetToken []byte