shard matching check

tests/waku_store_sync/sync_utils.nim

@@ -25,10 +25,12 @@ proc newTestWakuRecon*(
     idsRx: AsyncQueue[SyncID],
     wantsTx: AsyncQueue[(PeerId, Fingerprint)],
     needsTx: AsyncQueue[(PeerId, Fingerprint)],
+    shards: seq[uint16] = @[0, 1, 2, 3, 4, 5, 6, 7],
 ): Future[SyncReconciliation] {.async.} =
   let peerManager = PeerManager.new(switch)
 
   let res = await SyncReconciliation.new(
+    shards = shards,
     peerManager = peerManager,
     wakuArchive = nil,
     relayJitter = 0.seconds,

tests/waku_store_sync/test_protocol.nim

@@ -157,6 +157,40 @@ suite "Waku Sync: reconciliation":
       localWants.contains((clientPeerInfo.peerId, hash3)) == true
       localWants.contains((serverPeerInfo.peerId, hash2)) == true
 
+  asyncTest "sync 2 nodes different shards":
+    let
+      msg1 = fakeWakuMessage(ts = now(), contentTopic = DefaultContentTopic)
+      msg2 = fakeWakuMessage(ts = now() + 1, contentTopic = DefaultContentTopic)
+      msg3 = fakeWakuMessage(ts = now() + 2, contentTopic = DefaultContentTopic)
+      hash1 = computeMessageHash(DefaultPubsubTopic, msg1)
+      hash2 = computeMessageHash(DefaultPubsubTopic, msg2)
+      hash3 = computeMessageHash(DefaultPubsubTopic, msg3)
+
+    server.messageIngress(hash1, msg1)
+    server.messageIngress(hash2, msg2)
+    client.messageIngress(hash1, msg1)
+    client.messageIngress(hash3, msg3)
+
+    check:
+      remoteNeeds.contains((serverPeerInfo.peerId, hash3)) == false
+      remoteNeeds.contains((clientPeerInfo.peerId, hash2)) == false
+      localWants.contains((clientPeerInfo.peerId, hash3)) == false
+      localWants.contains((serverPeerInfo.peerId, hash2)) == false
+
+    server = await newTestWakuRecon(
+      serverSwitch, idsChannel, localWants, remoteNeeds, @[0.uint16, 1, 2, 3]
+    )
+    client = await newTestWakuRecon(
+      clientSwitch, idsChannel, localWants, remoteNeeds, @[4.uint16, 5, 6, 7]
+    )
+
+    var syncRes = await client.storeSynchronization(some(serverPeerInfo))
+    assert syncRes.isOk(), $syncRes.error
+
+    check:
+      remoteNeeds.len == 0
+      localWants.len == 0
+
   asyncTest "sync 2 nodes same hashes":
     let
       msg1 = fakeWakuMessage(ts = now(), contentTopic = DefaultContentTopic)

waku/node/waku_node.nim

@@ -216,9 +216,17 @@ proc mountStoreSync*(
   let wantsChannel = newAsyncQueue[(PeerId, WakuMessageHash)](100)
   let needsChannel = newAsyncQueue[(PeerId, WakuMessageHash)](100)
 
+  var shards = seq[uint16]
+  let enrRes = node.enr.toTyped()
+  if enrRes.isOk():
+    let shardingRes = enrRes.get().relaySharding()
+    if shardingRes.isSome():
+      let relayShard = shardingRes.get()
+      shards = relayShard.shardIds
+
   let recon =
     ?await SyncReconciliation.new(
-      node.peerManager, node.wakuArchive, storeSyncRange.seconds,
+      shards, node.peerManager, node.wakuArchive, storeSyncRange.seconds,
       storeSyncInterval.seconds, storeSyncRelayJitter.seconds, idsChannel, wantsChannel,
       needsChannel,
     )

waku/waku_store_sync/codec.nim

@@ -52,6 +52,14 @@ proc deltaEncode*(value: RangesData): seq[byte] =
     i = 0
     j = 0
 
+  # encode shards
+  buf = uint64(value.shards.len).toBytes(Leb128)
+  output &= @buf
+
+  for shard in value.shards:
+    buf = uint64(shard).toBytes(Leb128)
+    output &= @buf
+
   # the first range is implicit but must be explicit when encoded
   let (bound, _) = value.ranges[0]
 
@@ -209,6 +217,28 @@ proc getReconciled(idx: var int, buffer: seq[byte]): Result[bool, string] =
 
   return ok(recon)
 
+proc getShards(idx: var int, buffer: seq[byte]): Result[seq[uint16], string] =
+  if idx + VarIntLen > buffer.len:
+    return err("Cannot decode shards")
+
+  let slice = buffer[idx ..< idx + VarIntLen]
+  let (val, len) = uint64.fromBytes(slice, Leb128)
+  idx += len
+  let shardsLen = val
+
+  var shards: seq[uint16]
+  for _ in 0 ..< shardsLen:
+    if idx + VarIntLen > buffer.len:
+      return err("Cannot decode shards")
+
+    let slice = buffer[idx ..< idx + VarIntLen]
+    let (val, len) = uint64.fromBytes(slice, Leb128)
+    idx += len
+
+    shards.add(uint16(val))
+
+  return ok(shards)
+
 proc deltaDecode*(
     itemSet: var ItemSet, buffer: seq[byte], setLength: int
 ): Result[int, string] =
@@ -242,14 +272,16 @@ proc getItemSet(
   return ok(itemSet)
 
 proc deltaDecode*(T: type RangesData, buffer: seq[byte]): Result[T, string] =
-  if buffer.len == 1:
+  if buffer.len <= 1:
     return ok(RangesData())
 
   var
     payload = RangesData()
     lastTime = Timestamp(0)
     idx = 0
 
+  payload.shards = ?getShards(idx, buffer)
+
   lastTime = ?getTimestamp(idx, buffer)
 
   # implicit first hash is always 0 

waku/waku_store_sync/common.nim

@@ -26,6 +26,8 @@ type
     ItemSet = 2
 
   RangesData* = object
+    shards*: seq[uint16]
+
     ranges*: seq[(Slice[SyncID], RangeType)]
     fingerprints*: seq[Fingerprint] # Range type fingerprint stored here in order
     itemSets*: seq[ItemSet] # Range type itemset stored here in order

waku/waku_store_sync/reconciliation.nim

@@ -1,7 +1,7 @@
 {.push raises: [].}
 
 import
-  std/sequtils,
+  std/[sequtils, packedsets],
   stew/byteutils,
   results,
   chronicles,
@@ -37,6 +37,8 @@ logScope:
 const DefaultStorageCap = 50_000
 
 type SyncReconciliation* = ref object of LPProtocol
+  shards: PackedSet[uint16]
+
   peerManager: PeerManager
 
   wakuArchive: WakuArchive
@@ -114,16 +116,22 @@ proc processRequest(
     var
       hashToRecv: seq[WakuMessageHash]
       hashToSend: seq[WakuMessageHash]
+      sendPayload: RangesData
+      rawPayload: seq[byte]
+
+    # Only process the ranges IF the shards matches
+    if recvPayload.shards.toPackedSet() == self.shards:
+      sendPayload = self.storage.processPayload(recvPayload, hashToSend, hashToRecv)
 
-    let sendPayload = self.storage.processPayload(recvPayload, hashToSend, hashToRecv)
+      sendPayload.shards = self.shards.toSeq()
 
-    for hash in hashToSend:
-      await self.remoteNeedsTx.addLast((conn.peerId, hash))
+      for hash in hashToSend:
+        await self.remoteNeedsTx.addLast((conn.peerId, hash))
 
-    for hash in hashToRecv:
-      await self.localWantstx.addLast((conn.peerId, hash))
+      for hash in hashToRecv:
+        await self.localWantstx.addLast((conn.peerId, hash))
 
-    let rawPayload = sendPayload.deltaEncode()
+      rawPayload = sendPayload.deltaEncode()
 
     total_bytes_exchanged.observe(
       rawPayload.len, labelValues = [Reconciliation, Sending]
@@ -162,6 +170,7 @@ proc initiate(
 
     fingerprint = self.storage.computeFingerprint(bounds)
     initPayload = RangesData(
+      shards: self.shards.toSeq(),
       ranges: @[(bounds, RangeType.Fingerprint)],
       fingerprints: @[fingerprint],
       itemSets: @[],
@@ -261,6 +270,7 @@ proc initFillStorage(
 
 proc new*(
     T: type SyncReconciliation,
+    shards: seq[uint16],
     peerManager: PeerManager,
     wakuArchive: WakuArchive,
     syncRange: timer.Duration = DefaultSyncRange,
@@ -279,6 +289,7 @@ proc new*(
       SeqStorage.new(res.get())
 
   var sync = SyncReconciliation(
+    shards: shards.toPackedSet(),
     peerManager: peerManager,
     storage: storage,
     syncRange: syncRange,