mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2025-01-04 01:54:28 +00:00
102 lines
3.2 KiB
Go
102 lines
3.2 KiB
Go
/*
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Copyright 2022 Erigon-Lightclient contributors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package sentinel
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import (
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"crypto/ecdsa"
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"fmt"
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"net"
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"github.com/btcsuite/btcd/btcec/v2"
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"github.com/ledgerwatch/erigon/p2p/enode"
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"github.com/ledgerwatch/log/v3"
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"github.com/libp2p/go-libp2p-core/crypto"
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"github.com/libp2p/go-libp2p-core/peer"
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"github.com/multiformats/go-multiaddr"
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"github.com/pkg/errors"
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)
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func convertToInterfacePubkey(pubkey *ecdsa.PublicKey) (crypto.PubKey, error) {
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xVal, yVal := new(btcec.FieldVal), new(btcec.FieldVal)
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overflows := xVal.SetByteSlice(pubkey.X.Bytes())
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if overflows {
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return nil, errors.Errorf("X value overflows")
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}
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overflows = yVal.SetByteSlice(pubkey.Y.Bytes())
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if overflows {
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return nil, errors.Errorf("Y value overflows")
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}
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newKey := crypto.PubKey((*crypto.Secp256k1PublicKey)(btcec.NewPublicKey(xVal, yVal)))
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// Zero out temporary values.
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xVal.Zero()
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yVal.Zero()
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return newKey, nil
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}
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func convertToAddrInfo(node *enode.Node) (*peer.AddrInfo, multiaddr.Multiaddr, error) {
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multiAddr, err := convertToSingleMultiAddr(node)
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if err != nil {
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return nil, nil, err
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}
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info, err := peer.AddrInfoFromP2pAddr(multiAddr)
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if err != nil {
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return nil, nil, err
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}
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return info, multiAddr, nil
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}
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func convertToSingleMultiAddr(node *enode.Node) (multiaddr.Multiaddr, error) {
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pubkey := node.Pubkey()
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assertedKey, err := convertToInterfacePubkey(pubkey)
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if err != nil {
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return nil, errors.Wrap(err, "could not get pubkey")
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}
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id, err := peer.IDFromPublicKey(assertedKey)
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if err != nil {
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return nil, errors.Wrap(err, "could not get peer id")
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}
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return multiAddressBuilderWithID(node.IP().String(), "tcp", uint(node.TCP()), id)
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}
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func multiAddressBuilderWithID(ipAddr, protocol string, port uint, id peer.ID) (multiaddr.Multiaddr, error) {
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parsedIP := net.ParseIP(ipAddr)
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if parsedIP.To4() == nil && parsedIP.To16() == nil {
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return nil, errors.Errorf("invalid ip address provided: %s", ipAddr)
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}
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if id.String() == "" {
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return nil, errors.New("empty peer id given")
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}
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if parsedIP.To4() != nil {
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return multiaddr.NewMultiaddr(fmt.Sprintf("/ip4/%s/%s/%d/p2p/%s", ipAddr, protocol, port, id.String()))
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}
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return multiaddr.NewMultiaddr(fmt.Sprintf("/ip6/%s/%s/%d/p2p/%s", ipAddr, protocol, port, id.String()))
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}
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func convertToMultiAddr(nodes []*enode.Node) []multiaddr.Multiaddr {
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multiAddrs := []multiaddr.Multiaddr{}
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for _, node := range nodes {
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// ignore nodes with no ip address stored
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if node.IP() == nil {
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continue
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}
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multiAddr, err := convertToSingleMultiAddr(node)
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if err != nil {
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log.Debug("Could not convert to multiAddr", "err", err)
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continue
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}
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multiAddrs = append(multiAddrs, multiAddr)
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}
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return multiAddrs
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}
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