chore: add comment on cancel

Author: vasco-santos

src/handler.js

@@ -184,15 +184,20 @@ async function batchResponse ({ blocks, context, logger }) {
 
   try {
     let message = new Message()
+    logger.info({ keyList: context.canceled.keyList }, 'check keyList')
     for (let i = 0; i < blocks.length; i++) {
       const block = blocks[i]
       const canceledItem = context.canceled.get(block.key)
 
+      logger.info({ key: block.key, type: block.type, wantType: block.wantType }, 'check')
+      logger.info({ canceled: canceledItem }, 'canceled')
+
       if (canceledItem === block.wantType) {
         const size = messageSize[block.type](block)
         telemetry.increaseLabelCount('bitswap-block-success-cancel', [block.type])
         telemetry.increaseLabelCount('bitswap-cancel-size', [block.type], size)
 
+        logger.info({ key: block.key }, 'delete')
         context.canceled.delete(block.key)
       } else {
         const size = messageSize[block.type](block)

src/service.js

@@ -83,6 +83,7 @@ async function startService ({ peerId, port, peerAnnounceAddr, awsClient, connec
       }
     })
 
+    const cancelsPerPeer = new Map()
     const handlerOptions = {
       maxInboundStreams: connectionConfig.handler.maxInboundStreams,
       maxOutboundStreams: connectionConfig.handler.maxOutboundStreams
@@ -109,7 +110,7 @@ async function startService ({ peerId, port, peerAnnounceAddr, awsClient, connec
       service.handle(protocol, async ({ connection: dial, stream }) => {
         try {
           const connection = new Connection(stream)
-          const canceled = new LRU({ max: 200 })
+          const canceled = cancelsPerPeer.get(dial.remotePeer.toString())
 
           const hrTime = process.hrtime()
           const connectionId = hrTime[0] * 1000000000 + hrTime[1]
@@ -161,20 +162,29 @@ async function startService ({ peerId, port, peerAnnounceAddr, awsClient, connec
 
     // TODO move to networking
     service.connectionManager.addEventListener('peer:connect', connection => {
+      cancelsPerPeer.set(
+        connection.detail.remotePeer.toString(),
+        new LRU({ max: 200 })
+      )
+
       try {
         telemetry.increaseCount('bitswap-connections')
         telemetry.increaseGauge('bitswap-active-connections')
       } catch (err) {
-        logger.warn({ err, remotePeer: connection.remotePeer }, 'Error while peer connecting')
+        logger.warn({ err, remotePeer: connection.detail.remotePeer.toString() }, 'Error while peer connecting')
       }
     })
 
     // TODO move to networking
     service.connectionManager.addEventListener('peer:disconnect', connection => {
+      cancelsPerPeer.delete(
+        connection.detail.remotePeer.toString()
+      )
+
       try {
         telemetry.decreaseGauge('bitswap-active-connections')
       } catch (err) {
-        logger.warn({ err, remotePeer: connection.remotePeer }, 'Error while peer disconnecting')
+        logger.warn({ err, remotePeer: connection.detail.remotePeer.toString() }, 'Error while peer disconnecting')
       }
     })