nwaku/tests/test_peer_exchange.nim

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{.used.}
import
std/[sequtils, options],
stew/shims/net,
testutils/unittests,
chronicles,
chronos,
libp2p/peerid,
libp2p/crypto/crypto,
libp2p/protocols/pubsub/gossipsub
import
../../waku/waku_core,
../../waku/waku_node,
./testlib/wakucore,
./testlib/wakunode
procSuite "Peer Exchange":
asyncTest "GossipSub (relay) peer exchange":
## Tests peer exchange
# Create nodes and ENR. These will be added to the discoverable list
let
bindIp = parseIpAddress("0.0.0.0")
nodeKey1 = generateSecp256k1Key()
node1 = newTestWakuNode(nodeKey1, bindIp, Port(0))
nodeKey2 = generateSecp256k1Key()
node2 = newTestWakuNode(nodeKey2, bindIp, Port(0), sendSignedPeerRecord = true)
nodeKey3 = generateSecp256k1Key()
node3 = newTestWakuNode(nodeKey3, bindIp, Port(0), sendSignedPeerRecord = true)
var
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peerExchangeHandler, emptyHandler: RoutingRecordsHandler
completionFut = newFuture[bool]()
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proc ignorePeerExchange(peer: PeerId, topic: string,
peers: seq[RoutingRecordsPair]) {.gcsafe.} =
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discard
proc handlePeerExchange(peer: PeerId, topic: string,
peers: seq[RoutingRecordsPair]) {.gcsafe.} =
## Handle peers received via gossipsub peer exchange
let peerRecords = peers.mapIt(it.record.get())
check:
# Node 3 is informed of node 2 via peer exchange
peer == node1.switch.peerInfo.peerId
topic == DefaultPubsubTopic
peerRecords.countIt(it.peerId == node2.switch.peerInfo.peerId) == 1
if (not completionFut.completed()):
completionFut.complete(true)
peerExchangeHandler = handlePeerExchange
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emptyHandler = ignorePeerExchange
await node1.mountRelay(@[DefaultPubsubTopic], some(emptyHandler))
await node2.mountRelay(@[DefaultPubsubTopic], some(emptyHandler))
await node3.mountRelay(@[DefaultPubsubTopic], some(peerExchangeHandler))
# Ensure that node1 prunes all peers after the first connection
node1.wakuRelay.parameters.dHigh = 1
await allFutures([node1.start(), node2.start(), node3.start()])
await node1.connectToNodes(@[node2.switch.peerInfo.toRemotePeerInfo()])
await node3.connectToNodes(@[node1.switch.peerInfo.toRemotePeerInfo()])
check:
(await completionFut.withTimeout(5.seconds)) == true
await allFutures([node1.stop(), node2.stop(), node3.stop()])