message

var (
	// ErrInvalidMessage is return if the message is invalid
	ErrInvalidMessage = errors.New("invalid message")
	// ErrUndefinedMessage is return if the message is not defined
	ErrUndefinedMessage = errors.New("undefined message")
	// ErrFullChannel is returned if the message channel is full
	ErrFullChannel = errors.New("full channel")
)

var (
	ErrOldMessage             = errors.New("old message")
	ErrBadMsg                 = errors.New("bad message")
	ErrInvalidStateTransition = errors.New("invalid state transition")
	ErrDupMsg                 = errors.New("duplicate message")
)

var (
	ErrNotEchoMsg    = errors.New("not a echo message")
	ErrDifferentHash = errors.New("different hash")
)

var (
	ErrDupMessage = errors.New("duplicate message")
	ErrNotYours   = errors.New("not yours")
)