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
|
|
// 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/eth"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/p2p/enode"
|
|
)
|
|
|
|
type ulc struct {
|
|
trustedKeys map[string]struct{}
|
|
minTrustedFraction int
|
|
}
|
|
|
|
// newULC creates and returns a ultra light client instance.
|
|
func newULC(ulcConfig *eth.ULCConfig) *ulc {
|
|
if ulcConfig == nil {
|
|
return nil
|
|
}
|
|
m := make(map[string]struct{}, len(ulcConfig.TrustedServers))
|
|
for _, id := range ulcConfig.TrustedServers {
|
|
node, err := enode.ParseV4(id)
|
|
if err != nil {
|
|
log.Debug("Failed to parse trusted server", "id", id, "err", err)
|
|
continue
|
|
}
|
|
m[node.ID().String()] = struct{}{}
|
|
}
|
|
return &ulc{m, ulcConfig.MinTrustedFraction}
|
|
}
|
|
|
|
// isTrusted return an indicator that whether the specified peer is trusted.
|
|
func (u *ulc) isTrusted(p enode.ID) bool {
|
|
if u.trustedKeys == nil {
|
|
return false
|
|
}
|
|
_, ok := u.trustedKeys[p.String()]
|
|
return ok
|
|
}
|