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