mirror of https://github.com/status-im/go-waku.git
102 lines
2.1 KiB
Go
102 lines
2.1 KiB
Go
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package utils
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import (
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"crypto/ecdsa"
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"fmt"
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"math"
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"net"
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"strconv"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/enr"
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"github.com/libp2p/go-libp2p-core/peer"
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ma "github.com/multiformats/go-multiaddr"
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)
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const WakuENRField = "waku2"
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// WakuEnrBitfield is a8-bit flag field to indicate Waku capabilities. Only the 4 LSBs are currently defined according to RFC31 (https://rfc.vac.dev/spec/31/).
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type WakuEnrBitfield = uint8
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func NewWakuEnrBitfield(lightpush, filter, store, relay bool) WakuEnrBitfield {
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var v uint8 = 0
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if lightpush {
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v |= (1 << 3)
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}
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if filter {
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v |= (1 << 2)
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}
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if store {
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v |= (1 << 1)
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}
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if relay {
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v |= (1 << 0)
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}
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return v
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}
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func GetENRandIP(addr ma.Multiaddr, wakuFlags WakuEnrBitfield, privK *ecdsa.PrivateKey) (*enode.Node, *net.TCPAddr, error) {
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ip, err := addr.ValueForProtocol(ma.P_IP4)
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if err != nil {
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return nil, nil, err
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}
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portStr, err := addr.ValueForProtocol(ma.P_TCP)
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if err != nil {
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return nil, nil, err
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}
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port, err := strconv.Atoi(portStr)
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if err != nil {
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return nil, nil, err
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}
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tcpAddr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("%s:%d", ip, port))
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if err != nil {
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return nil, nil, err
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}
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r := &enr.Record{}
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if port > 0 && port <= math.MaxUint16 {
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r.Set(enr.TCP(uint16(port))) // lgtm [go/incorrect-integer-conversion]
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} else {
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return nil, nil, fmt.Errorf("could not set port %d", port)
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}
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r.Set(enr.IP(net.ParseIP(ip)))
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r.Set(enr.WithEntry(WakuENRField, wakuFlags))
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err = enode.SignV4(r, privK)
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if err != nil {
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return nil, nil, err
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}
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node, err := enode.New(enode.ValidSchemes, r)
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return node, tcpAddr, err
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}
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func EnodeToMultiAddr(node *enode.Node) (ma.Multiaddr, error) {
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peerID, err := peer.IDFromPublicKey(&ECDSAPublicKey{node.Pubkey()})
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if err != nil {
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return nil, err
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}
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return ma.NewMultiaddr(fmt.Sprintf("/ip4/%s/tcp/%d/p2p/%s", node.IP(), node.TCP(), peerID))
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}
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func EnodeToPeerInfo(node *enode.Node) (*peer.AddrInfo, error) {
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address, err := EnodeToMultiAddr(node)
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if err != nil {
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return nil, err
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}
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return peer.AddrInfoFromP2pAddr(address)
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}
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