exec

type Cell interface {
	cells.Cell

	// Parent - Parent cell.
	Parent() cells.Cell

	// ExecChild - Child cell by index.
	ExecChild(int) Cell

	// Context - Execution context.
	Context() context.Context

	// WithContext - Cell with context.
	WithContext(context.Context) Cell
}

type State interface {
	// Op - Execution cell.
	Op() Cell

	// Block - Chain block.
	Block() *chain.Block

	// Store - Execution state.
	Store() Store

	// WithOp - Switches op cell.
	WithOp(Cell) State
}

type Store interface {
	// Get - Gets value under key.
	Get(key *cells.CID) (uint64, error)

	// Update - Updates value under key.
	Update(key *cells.CID, value uint64) error

	// Total - Total power.
	Total() uint64

	// Commit - Saves store state to database.
	Commit() (*cells.CID, error)

	// Clone - Clones store with current state.
	Clone() (Store, error)
}