mirror of https://github.com/status-im/go-waku.git
71 lines
2.3 KiB
Go
71 lines
2.3 KiB
Go
package peer_exchange
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import (
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"context"
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"github.com/libp2p/go-libp2p/core/host"
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"github.com/libp2p/go-libp2p/core/peer"
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"github.com/waku-org/go-waku/waku/v2/peermanager"
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"github.com/waku-org/go-waku/waku/v2/utils"
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"go.uber.org/zap"
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)
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type PeerExchangeParameters struct {
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host host.Host
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selectedPeer peer.ID
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pm *peermanager.PeerManager
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log *zap.Logger
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}
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type PeerExchangeOption func(*PeerExchangeParameters)
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// WithPeer is an option used to specify the peerID to push a waku message to
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func WithPeer(p peer.ID) PeerExchangeOption {
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return func(params *PeerExchangeParameters) {
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params.selectedPeer = p
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}
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}
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// WithAutomaticPeerSelection is an option used to randomly select a peer from the peer store
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// to obtains peers from. If a list of specific peers is passed, the peer will be chosen
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// from that list assuming it supports the chosen protocol, otherwise it will chose a peer
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// from the node peerstore
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func WithAutomaticPeerSelection(fromThesePeers ...peer.ID) PeerExchangeOption {
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return func(params *PeerExchangeParameters) {
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var p peer.ID
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var err error
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if params.pm == nil {
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p, err = utils.SelectPeer(params.host, PeerExchangeID_v20alpha1, fromThesePeers, params.log)
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} else {
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p, err = params.pm.SelectPeer(PeerExchangeID_v20alpha1, fromThesePeers, params.log)
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}
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if err == nil {
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params.selectedPeer = p
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} else {
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params.log.Info("selecting peer", zap.Error(err))
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}
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}
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}
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// WithFastestPeerSelection is an option used to select a peer from the peer store
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// with the lowest ping. If a list of specific peers is passed, the peer will be chosen
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// from that list assuming it supports the chosen protocol, otherwise it will chose a peer
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// from the node peerstore
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func WithFastestPeerSelection(ctx context.Context, fromThesePeers ...peer.ID) PeerExchangeOption {
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return func(params *PeerExchangeParameters) {
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p, err := utils.SelectPeerWithLowestRTT(ctx, params.host, PeerExchangeID_v20alpha1, fromThesePeers, params.log)
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if err == nil {
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params.selectedPeer = p
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} else {
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params.log.Info("selecting peer", zap.Error(err))
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}
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}
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}
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// DefaultOptions are the default options to be used when using the lightpush protocol
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func DefaultOptions(host host.Host) []PeerExchangeOption {
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return []PeerExchangeOption{
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WithAutomaticPeerSelection(),
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}
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}
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