api

type ErrGroup interface{ Go(f func() error) }

type ExecutionBackend interface {
	BlockChain() *core.BlockChain
	TxPool() *core.TxPool
	StateAtBlock(block *types.Block, reexec uint64, base *state.StateDB, checkLive bool, preferDisk bool) (statedb *state.StateDB, err error)
}

type Service interface {
	// Starts the service (non-blocking).
	// Long-running goroutines must be scheduled via `eg`, using `ctx`.
	Start(ctx context.Context, eg ErrGroup) error
}