go-pulse/p2p/dnsdisc/error.go
Felix Lange 0568e81701
p2p/dnsdisc: add implementation of EIP-1459 (#20094)
This adds an implementation of node discovery via DNS TXT records to the
go-ethereum library. The implementation doesn't match EIP-1459 exactly,
the main difference being that this implementation uses separate merkle
trees for tree links and ENRs. The EIP will be updated to match p2p/dnsdisc.

To maintain DNS trees, cmd/devp2p provides a frontend for the p2p/dnsdisc
library. The new 'dns' subcommands can be used to create, sign and deploy DNS
discovery trees.
2019-09-25 11:38:13 +02:00

64 lines
1.9 KiB
Go

// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package dnsdisc
import (
"errors"
"fmt"
)
// Entry parse errors.
var (
errUnknownEntry = errors.New("unknown entry type")
errNoPubkey = errors.New("missing public key")
errBadPubkey = errors.New("invalid public key")
errInvalidENR = errors.New("invalid node record")
errInvalidChild = errors.New("invalid child hash")
errInvalidSig = errors.New("invalid base64 signature")
errSyntax = errors.New("invalid syntax")
)
// Resolver/sync errors
var (
errNoRoot = errors.New("no valid root found")
errNoEntry = errors.New("no valid tree entry found")
errHashMismatch = errors.New("hash mismatch")
errENRInLinkTree = errors.New("enr entry in link tree")
errLinkInENRTree = errors.New("link entry in ENR tree")
)
type nameError struct {
name string
err error
}
func (err nameError) Error() string {
if ee, ok := err.err.(entryError); ok {
return fmt.Sprintf("invalid %s entry at %s: %v", ee.typ, err.name, ee.err)
}
return err.name + ": " + err.err.Error()
}
type entryError struct {
typ string
err error
}
func (err entryError) Error() string {
return fmt.Sprintf("invalid %s entry: %v", err.typ, err.err)
}