mirror of https://github.com/status-im/go-waku.git
100 lines
3.0 KiB
Go
100 lines
3.0 KiB
Go
//go:build gowaku_rln
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// +build gowaku_rln
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package node
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import (
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"encoding/hex"
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"errors"
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"github.com/waku-org/go-waku/waku/v2/protocol/rln"
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r "github.com/waku-org/go-zerokit-rln/rln"
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"go.uber.org/zap"
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)
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// RLNRelay is used to access any operation related to Waku RLN protocol
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func (w *WakuNode) RLNRelay() RLNRelay {
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return w.rlnRelay
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}
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func (w *WakuNode) mountRlnRelay() error {
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// check whether inputs are provided
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// relay protocol is the prerequisite of rln-relay
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if w.Relay() == nil {
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return errors.New("relay protocol is required")
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}
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// check whether the pubsub topic is supported at the relay level
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topicFound := false
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for _, t := range w.Relay().Topics() {
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if t == w.opts.rlnRelayPubsubTopic {
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topicFound = true
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break
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}
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}
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if !topicFound {
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return errors.New("relay protocol does not support the configured pubsub topic")
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}
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if !w.opts.rlnRelayDynamic {
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w.log.Info("setting up waku-rln-relay in off-chain mode")
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// set up rln relay inputs
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groupKeys, memKeyPair, memIndex, err := rln.StaticSetup(w.opts.rlnRelayMemIndex)
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if err != nil {
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return err
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}
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// mount rlnrelay in off-chain mode with a static group of users
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rlnRelay, err := rln.RlnRelayStatic(w.ctx, w.relay, groupKeys, memKeyPair, memIndex, w.opts.rlnRelayPubsubTopic, w.opts.rlnRelayContentTopic, w.opts.rlnSpamHandler, w.timesource, w.log)
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if err != nil {
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return err
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}
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w.rlnRelay = rlnRelay
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// check the correct construction of the tree by comparing the calculated root against the expected root
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// no error should happen as it is already captured in the unit tests
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root, err := rlnRelay.RLN.GetMerkleRoot()
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if err != nil {
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return err
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}
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expectedRoot := r.STATIC_GROUP_MERKLE_ROOT
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if hex.EncodeToString(root[:]) != expectedRoot {
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return errors.New("root mismatch: something went wrong not in Merkle tree construction")
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}
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w.log.Info("the calculated root", zap.String("root", hex.EncodeToString(root[:])))
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} else {
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w.log.Info("setting up waku-rln-relay in on-chain mode")
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// check if the peer has provided its rln credentials
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var memKeyPair *r.MembershipKeyPair
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if w.opts.rlnRelayIDCommitment != nil && w.opts.rlnRelayIDKey != nil {
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memKeyPair = &r.MembershipKeyPair{
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IDCommitment: *w.opts.rlnRelayIDCommitment,
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IDKey: *w.opts.rlnRelayIDKey,
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}
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}
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// mount the rln relay protocol in the on-chain/dynamic mode
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var err error
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w.rlnRelay, err = rln.RlnRelayDynamic(w.ctx, w.relay, w.opts.rlnETHClientAddress, w.opts.rlnETHPrivateKey, w.opts.rlnMembershipContractAddress, memKeyPair, w.opts.rlnRelayMemIndex, w.opts.rlnRelayPubsubTopic, w.opts.rlnRelayContentTopic, w.opts.rlnSpamHandler, w.opts.rlnRegistrationHandler, w.timesource, w.log)
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if err != nil {
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return err
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}
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}
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w.log.Info("mounted waku RLN relay", zap.String("pubsubTopic", w.opts.rlnRelayPubsubTopic), zap.String("contentTopic", w.opts.rlnRelayContentTopic))
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return nil
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}
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func (w *WakuNode) stopRlnRelay() error {
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if w.rlnRelay != nil {
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w.rlnRelay.Stop()
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}
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return nil
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}
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