74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
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// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package feed
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import (
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"fmt"
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)
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const (
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ErrInit = iota
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ErrNotFound
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ErrIO
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ErrUnauthorized
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ErrInvalidValue
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ErrDataOverflow
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ErrNothingToReturn
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ErrCorruptData
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ErrInvalidSignature
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ErrNotSynced
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ErrPeriodDepth
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ErrCnt
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)
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// Error is a the typed error object used for Swarm feeds
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type Error struct {
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code int
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err string
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}
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// Error implements the error interface
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func (e *Error) Error() string {
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return e.err
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}
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// Code returns the error code
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// Error codes are enumerated in the error.go file within the feeds package
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func (e *Error) Code() int {
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return e.code
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}
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// NewError creates a new Swarm feeds Error object with the specified code and custom error message
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func NewError(code int, s string) error {
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if code < 0 || code >= ErrCnt {
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panic("no such error code!")
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}
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r := &Error{
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err: s,
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}
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switch code {
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case ErrNotFound, ErrIO, ErrUnauthorized, ErrInvalidValue, ErrDataOverflow, ErrNothingToReturn, ErrInvalidSignature, ErrNotSynced, ErrPeriodDepth, ErrCorruptData:
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r.code = code
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}
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return r
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}
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// NewErrorf is a convenience version of NewError that incorporates printf-style formatting
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func NewErrorf(code int, format string, args ...interface{}) error {
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return NewError(code, fmt.Sprintf(format, args...))
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}
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