errors

var (
	// Database errors
	ErrNotFound     = errors.New("not found")
	ErrClosed       = errors.New("closed")
	ErrCorrupted    = errors.New("corrupted")
	ErrReadOnly     = errors.New("read only")
	ErrDiskFull     = errors.New("disk full")
	ErrInvalidKey   = errors.New("invalid key")
	ErrInvalidValue = errors.New("invalid value")

	// Network errors
	ErrTimeout          = errors.New("timeout")
	ErrConnectionClosed = errors.New("connection closed")
	ErrConnectionReset  = errors.New("connection reset")
	ErrNoRoute          = errors.New("no route to host")
	ErrRefused          = errors.New("connection refused")
	ErrNetworkDown      = errors.New("network down")

	// Validation errors
	ErrInvalidInput     = errors.New("invalid input")
	ErrInvalidSignature = errors.New("invalid signature")
	ErrInvalidChecksum  = errors.New("invalid checksum")
	ErrInvalidFormat    = errors.New("invalid format")
	ErrMissingField     = errors.New("missing required field")
	ErrFieldTooLarge    = errors.New("field exceeds maximum size")

	// State errors
	ErrNotInitialized = errors.New("not initialized")
	ErrAlreadyExists  = errors.New("already exists")
	ErrNotSupported   = errors.New("not supported")
	ErrDeprecated     = errors.New("deprecated")
	ErrConflict       = errors.New("conflict")
	ErrCanceled       = errors.New("canceled")

	// Resource errors
	ErrResourceExhausted = errors.New("resource exhausted")
	ErrQuotaExceeded     = errors.New("quota exceeded")
	ErrRateLimited       = errors.New("rate limited")
	ErrOutOfMemory       = errors.New("out of memory")

	// Permission errors
	ErrUnauthorized = errors.New("unauthorized")
	ErrForbidden    = errors.New("forbidden")
	ErrAccessDenied = errors.New("access denied")
)