internal

var (
	// General errors
	ErrInvalidParameters = errors.New("invalid parameters provided")
	ErrInternalError     = errors.New("internal library error")
	ErrMemoryAllocation  = errors.New("memory allocation failed")

	// Key generation errors
	ErrKeyGeneration         = errors.New("failed to generate cryptographic key")
	ErrInsufficientEntropy   = errors.New("insufficient entropy for key generation")
	ErrKeyMaterialExtraction = errors.New("failed to extract key material")

	// Key validation errors
	ErrInvalidKey       = errors.New("invalid cryptographic key")
	ErrInvalidKeyLength = errors.New("invalid key length")
	ErrInvalidKeyFormat = errors.New("invalid key format")
	ErrKeyNotOnCurve    = errors.New("public key point is not on the curve")
	ErrKeyAtInfinity    = errors.New("key point is at infinity (invalid)")
	ErrZeroScalar       = errors.New("private key scalar is zero (invalid)")
	ErrKeyOutOfRange    = errors.New("private key is not in valid range")

	// Cryptographic operation errors
	ErrPointAddition      = errors.New("elliptic curve point addition failed")
	ErrScalarAddition     = errors.New("scalar addition failed")
	ErrResultConversion   = errors.New("failed to convert operation result")
	ErrInsufficientBuffer = errors.New("result buffer is too small")

	// Hash-to-field errors
	ErrHashToField       = errors.New("hash-to-field operation failed")
	ErrExpandMessage     = errors.New("message expansion failed")
	ErrExpansionTooLarge = errors.New("expansion length exceeds buffer limits")

	// Key derivation errors
	ErrKeyDerivation   = errors.New("key derivation failed")
	ErrInputTooLarge   = errors.New("input data too large")
	ErrContextTooLarge = errors.New("context data too large")
	ErrDSTTooLarge     = errors.New("domain separation tag too large")

	// JWK and encoding errors
	ErrJWKCreation        = errors.New("failed to create JWK")
	ErrJWKExtraction      = errors.New("failed to extract key from JWK")
	ErrKeyTypeUnsupported = errors.New("unsupported key type")
	ErrCurveUnsupported   = errors.New("unsupported elliptic curve")

	// Workflow errors (F0, F1 functions)
	ErrEmptyEmailMap       = errors.New("email map cannot be empty")
	ErrEmptyEmail          = errors.New("email cannot be empty")
	ErrEmptyUUID           = errors.New("uuid cannot be empty")
	ErrUserNotFound        = errors.New("user data not found")
	ErrMasterKeyNotSet     = errors.New("master key not available")
	ErrSaltGeneration      = errors.New("failed to generate salt")
	ErrPayloadModification = errors.New("failed to modify VC payload")
)