package protocol

// MessageType represents the type of protocol message
type MessageType byte

const (
	ChallengeRequestType  MessageType = 0x01
	SolutionRequestType   MessageType = 0x03
	// Response types (for responses.go)
	ChallengeResponseType MessageType = 0x02
	QuoteResponseType     MessageType = 0x04
	ErrorResponseType     MessageType = 0x05
)

// Error codes as defined in protocol specification
const (
	ErrMalformedMessage    = "MALFORMED_MESSAGE"
	ErrInvalidChallenge    = "INVALID_CHALLENGE"
	ErrInvalidSolution     = "INVALID_SOLUTION"
	ErrExpiredChallenge    = "EXPIRED_CHALLENGE"
	ErrRateLimited         = "RATE_LIMITED"
	ErrServerError         = "SERVER_ERROR"
	ErrTooManyConnections  = "TOO_MANY_CONNECTIONS"
	ErrDifficultyTooHigh   = "DIFFICULTY_TOO_HIGH"
)

// Protocol constants
const (
	MaxPayloadSize = 8 * 1024 // 8KB maximum payload size
	HeaderSize     = 5        // 1 byte type + 4 bytes length
)