forked from cerc-io/plugeth
4e0c1a1a6b
* eth, les: reject light client connection is server is not synced * eth, les: rename function and variables * les: format
55 lines
1.7 KiB
Go
55 lines
1.7 KiB
Go
// 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/eth"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p/enode"
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)
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type ulc struct {
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trustedKeys map[string]struct{}
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minTrustedFraction int
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}
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// newULC creates and returns a ultra light client instance.
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func newULC(ulcConfig *eth.ULCConfig) *ulc {
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if ulcConfig == nil {
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return nil
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}
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m := make(map[string]struct{}, len(ulcConfig.TrustedServers))
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for _, id := range ulcConfig.TrustedServers {
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node, err := enode.ParseV4(id)
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if err != nil {
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log.Debug("Failed to parse trusted server", "id", id, "err", err)
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continue
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}
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m[node.ID().String()] = struct{}{}
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}
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return &ulc{m, ulcConfig.MinTrustedFraction}
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}
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// isTrusted return an indicator that whether the specified peer is trusted.
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func (u *ulc) isTrusted(p enode.ID) bool {
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if u.trustedKeys == nil {
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return false
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}
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_, ok := u.trustedKeys[p.String()]
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return ok
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}
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