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// Copyright (c) 2020 The Decred developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package secp256k1
// ErrorKind identifies a kind of error. It has full support for errors.Is and
// errors.As, so the caller can directly check against an error kind when
// determining the reason for an error.
type ErrorKind string
// These constants are used to identify a specific RuleError.
const (
// ErrPubKeyInvalidLen indicates that the length of a serialized public
// key is not one of the allowed lengths.
ErrPubKeyInvalidLen = ErrorKind("ErrPubKeyInvalidLen")
// ErrPubKeyInvalidFormat indicates an attempt was made to parse a public
// key that does not specify one of the supported formats.
ErrPubKeyInvalidFormat = ErrorKind("ErrPubKeyInvalidFormat")
// ErrPubKeyXTooBig indicates that the x coordinate for a public key
// is greater than or equal to the prime of the field underlying the group.
ErrPubKeyXTooBig = ErrorKind("ErrPubKeyXTooBig")
// ErrPubKeyYTooBig indicates that the y coordinate for a public key is
// greater than or equal to the prime of the field underlying the group.
ErrPubKeyYTooBig = ErrorKind("ErrPubKeyYTooBig")
// ErrPubKeyNotOnCurve indicates that a public key is not a point on the
// secp256k1 curve.
ErrPubKeyNotOnCurve = ErrorKind("ErrPubKeyNotOnCurve")
// ErrPubKeyMismatchedOddness indicates that a hybrid public key specified
// an oddness of the y coordinate that does not match the actual oddness of
// the provided y coordinate.
ErrPubKeyMismatchedOddness = ErrorKind("ErrPubKeyMismatchedOddness")
)
// Error satisfies the error interface and prints human-readable errors.
func (e ErrorKind) Error() string {
return string(e)
}
// Error identifies an error related to public key cryptography using a
// sec256k1 curve. 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}
}
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