Official Go implementation of the Ethereum protocol
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go-ethereum/les/enr_entry.go

44 lines
1.5 KiB

// Copyright 2019 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 les
import (
"github.com/ethereum/go-ethereum/p2p/dnsdisc"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/rlp"
)
// lesEntry is the "les" ENR entry. This is set for LES servers only.
type lesEntry struct {
// Ignore additional fields (for forward compatibility).
Rest []rlp.RawValue `rlp:"tail"`
}
// ENRKey implements enr.Entry.
func (e lesEntry) ENRKey() string {
return "les"
}
// setupDiscovery creates the node discovery source for the eth protocol.
func (eth *LightEthereum) setupDiscovery() (enode.Iterator, error) {
if len(eth.config.DiscoveryURLs) == 0 {
return nil, nil
}
client := dnsdisc.NewClient(dnsdisc.Config{})
return client.NewIterator(eth.config.DiscoveryURLs...)
}