well-goknown/vendor/github.com/decred/dcrd/crypto/blake256/error.go

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// Copyright (c) 2024 The Decred developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package blake256
// ErrorKind identifies a kind of error.
type ErrorKind string
// These constants are used to identify a specific ErrorKind.
const (
// ErrMalformedState indicates a serialized intermediate state is malformed
// in some way such as not having at least the expected number of bytes.
ErrMalformedState = ErrorKind("ErrMalformedState")
// ErrMismatchedState indicates a serialized intermediate state is not for
// the hash type that is attempting to restore it. For example, it will be
// returned when attempting to restore a BLAKE-256 intermediate state with
// a BLAKE-224 hasher.
ErrMismatchedState = ErrorKind("ErrMismatchedState")
)
// Error satisfies the error interface and prints human-readable errors.
func (e ErrorKind) Error() string {
return string(e)
}
// Error identifies an error related to restoring an intermediate hashing state.
//
// It has full support for [errors.Is] and [errors.As], so the caller can
// ascertain the specific reason for the error by checking the underlying error.
type Error struct {
Err error
Description string
}
// Error satisfies the error interface and prints human-readable errors.
func (e Error) Error() string {
return e.Description
}
// Unwrap returns the underlying wrapped error.
func (e Error) Unwrap() error {
return e.Err
}
// makeError creates an [Error] given a set of arguments.
func makeError(kind ErrorKind, desc string) Error {
return Error{Err: kind, Description: desc}
}