chore: add comment on cancel

Author: vasco-santos

src/handler.js

@@ -183,10 +183,14 @@ async function batchResponse ({ blocks, context, logger }) {
   }
 
   try {
+    logger.info({ key: context.canceled }, 'batch response')
     let message = new Message()
     for (let i = 0; i < blocks.length; i++) {
       const block = blocks[i]
+      console.log('block key', block.key)
       const canceledItem = context.canceled.get(block.key)
+      logger.info({ key: block.key }, 'check')
+      logger.info({ canceled: canceledItem }, 'check')
       if (!canceledItem || canceledItem !== block.type) {
         const size = messageSize[block.type](block)
 
@@ -203,6 +207,7 @@ async function batchResponse ({ blocks, context, logger }) {
         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)
       }
     }
@@ -222,15 +227,18 @@ function updateCanceledState (wantList, context) {
 
   // Removed previous canceled blocks
   wantedBlocks.forEach(block => {
+    console.log('remove block from canceled', block.key)
     context.canceled.delete(block.key)
   })
 
   wantedHave.forEach(block => {
+    console.log('remove wanted block from canceled', block.key)
     context.canceled.delete(block.key)
   })
 
   // Add new canceled blocks
   canceled.forEach(block => {
+    console.log('add block to canceled', block.key)
     context.canceled.set(block.key, block.wantType)
   })
 }