db

var (
	// ErrBlockExists is the error when block eixsts.
	ErrBlockExists = errors.New("block exists")
	// ErrBlockDoesNotExist is the error when block does not eixst.
	ErrBlockDoesNotExist = errors.New("block does not exist")
	// ErrIterationFinished is the error to check if the iteration is finished.
	ErrIterationFinished = errors.New("iteration finished")
	// ErrEmptyPath is the error when the required path is empty.
	ErrEmptyPath = fmt.Errorf("empty path")
	// ErrClosed is the error when using DB after it's closed.
	ErrClosed = fmt.Errorf("db closed")
	// ErrNotImplemented is the error that some interface is not implemented.
	ErrNotImplemented = fmt.Errorf("not implemented")
	// ErrInvalidCompactionChainTipHeight means the newly updated height of
	// the tip of compaction chain is invalid, usually means it's smaller than
	// current cached one.
	ErrInvalidCompactionChainTipHeight = fmt.Errorf(
		"invalid compaction chain tip height")
	// ErrDKGPrivateKeyExists raised when attempting to save DKG private key
	// that already saved.
	ErrDKGPrivateKeyExists = errors.New("dkg private key exists")
	// ErrDKGPrivateKeyDoesNotExist raised when the DKG private key of the
	// requested round does not exists.
	ErrDKGPrivateKeyDoesNotExist = errors.New("dkg private key does not exists")
	// ErrDKGProtocolExists raised when attempting to save DKG protocol
	// that already saved.
	ErrDKGProtocolExists = errors.New("dkg protocol exists")
	// ErrDKGProtocolDoesNotExist raised when the DKG protocol of the
	// requested round does not exists.
	ErrDKGProtocolDoesNotExist = errors.New("dkg protocol does not exists")
)