Review TODO items and self-assign the most important ones

beacon_chain/beacon_chain_db.nim

@@ -129,8 +129,8 @@ func subkey(root: Eth2Digest, slot: Slot): array[40, byte] =
   ret
 
 template panic =
-  # TODO: Could we recover from a corrupted database?
+  # TODO(zah): Could we recover from a corrupted database?
-  #       Review all usages.
+  #            Review all usages.
   raiseAssert "The database should not be corrupted"
 
 proc init*[T](Seq: type DbSeq[T], db: SqStoreRef, name: string): Seq =
@@ -232,15 +232,16 @@ proc init*(T: type BeaconChainDB,
            inMemory = false): BeaconChainDB =
   if inMemory:
     # TODO
-    # The inMemory store shuold offer the complete functionality
+    # To support testing, the inMemory store should offer the complete
-    # of the database-backed one (i.e. tracking of deposits and validators)
+    # functionalityof the database-backed one (i.e. tracking of deposits
+    # and validators)
     T(backend: kvStore MemStoreRef.init(),
       preset: preset,
       finalizedEth1DepositsMerkleizer: init DepositsMerkleizer,
       finalizedEth2DepositsMerkleizer: init DepositsMerkleizer)
   else:
     let s = secureCreatePath(dir)
-    doAssert s.isOk # TODO Handle this in a better way
+    doAssert s.isOk # TODO(zah) Handle this in a better way
 
     let sqliteStore = SqStoreRef.init(dir, "nbc", Keyspaces).expect(
       "working database")

beacon_chain/block_pools/chain_dag.nim

@@ -964,7 +964,7 @@ proc preInit*(
 proc setTailState*(dag: ChainDAGRef,
                    checkpointState: BeaconState,
                    checkpointBlock: SignedBeaconBlock) =
-  # TODO
+  # TODO(zah)
   # Delete all records up to the tail node. If the tail node is not
   # in the database, init the dabase in a way similar to `preInit`.
   discard

beacon_chain/eth1_monitor.nim

@@ -315,7 +315,8 @@ proc getBlockProposalData*(m: Eth1Monitor,
   var pendingDepositsCount = state.eth1_data.deposit_count -
                              state.eth1_deposit_index
 
-  # TODO To make block proposal cheaper, we can perform this action more regularly
+  # TODO(zah)
+  #      To make block proposal cheaper, we can perform this action more regularly
   #      (e.g. in BeaconNode.onSlot). But keep in mind that this action needs to be
   #      performed only when there are validators attached to the node.
   let ourDepositsCount = m.db.deposits.len
@@ -573,7 +574,7 @@ proc syncBlockRange(m: Eth1Monitor, fromBlock, toBlock: Eth1BlockNumber) {.async
     let eth1Blocks = depositEventsToBlocks(depositLogs)
 
     for i in 0 ..< eth1Blocks.len:
-      # TODO: The DB operations should be executed as a transaction here
+      # TODO(zah): The DB operations should be executed as a transaction here
       let blk = eth1Blocks[i]
 
       for deposit in blk.deposits:

beacon_chain/eth2_discovery.nim

@@ -68,16 +68,6 @@ proc loadBootstrapFile*(bootstrapFile: string,
     except IOError as e:
       error "Could not read bootstrap file", msg = e.msg
       quit 1
-
-  elif cmpIgnoreCase(ext, ".yaml") == 0:
-    # TODO. This is very ugly, but let's try to negotiate the
-    # removal of YAML metadata.
-    try:
-      for ln in strippedLines(bootstrapFile):
-        addBootstrapNode(string(ln.strip()[3..^2]), bootstrapEnrs)
-    except IOError as e:
-      error "Could not read bootstrap file", msg = e.msg
-      quit 1
   else:
     error "Unknown bootstrap file format", ext
     quit 1

beacon_chain/eth2_network.nim

@@ -57,7 +57,6 @@ type
     peerId*: PeerID
     stamp*: chronos.Moment
 
-  # TODO Is this really needed?
   Eth2Node* = ref object of RootObj
     switch*: Switch
     pubsub*: PubSub
@@ -323,8 +322,8 @@ proc getPeer*(node: Eth2Node, peerId: PeerID): Peer =
     return node.peers.mGetOrPut(peerId, peer)
 
 proc peerFromStream(network: Eth2Node, conn: Connection): Peer =
-  # TODO: Can this be `nil`?
+  result = network.getPeer(conn.peerInfo.peerId)
-  return network.getPeer(conn.peerInfo.peerId)
+  result.info = conn.peerInfo
 
 proc getKey*(peer: Peer): PeerID {.inline.} =
   peer.info.peerId
@@ -427,7 +426,7 @@ proc addSeen*(network: ETh2Node, peerId: PeerID,
 
 proc disconnect*(peer: Peer, reason: DisconnectionReason,
                  notifyOtherPeer = false) {.async.} =
-  # TODO: How should we notify the other peer?
+  # TODO(zah): How should we notify the other peer?
   try:
     if peer.connectionState notin {Disconnecting, Disconnected}:
       peer.connectionState = Disconnecting
@@ -655,11 +654,6 @@ proc handleIncomingStream(network: Eth2Node,
 
   let peer = peerFromStream(network, conn)
   try:
-    # TODO peer connection setup is broken, update info in some better place
-    #      whenever race is fix:
-    #      https://github.com/status-im/nimbus-eth2/issues/1157
-    peer.info = conn.peerInfo
-
     template returnInvalidRequest(msg: ErrorMsg) =
       peer.updateScore(PeerScoreInvalidRequest)
       await sendErrorResponse(peer, conn, InvalidRequest, msg)
@@ -676,7 +670,7 @@ proc handleIncomingStream(network: Eth2Node,
 
       fs
     else:
-      # TODO The TTFB timeout is not implemented in LibP2P streams back-end
+      # TODO(zah) The TTFB timeout is not implemented in LibP2P streams back-end
       conn
 
     let deadline = sleepAsync RESP_TIMEOUT
@@ -807,7 +801,7 @@ proc dialPeer*(node: Eth2Node, peerAddr: PeerAddr, index = 0) {.async.} =
         deadline.cancel()
       inc nbc_successful_dials
     else:
-      # TODO: As soon as `nim-libp2p` will be able to handle cancellation
+      # TODO(cheatfate): As soon as `nim-libp2p` will be able to handle cancellation
       # properly and will have cancellation tests, we need add here cancellation
       # of `workfut`.
       # workfut.cancel()
@@ -1448,7 +1442,7 @@ proc addValidator*[MsgType](node: Eth2Node,
       if decompressed.len > 0:
         return msgValidator(SSZ.decode(decompressed, MsgType))
       else:
-        # TODO penalize peer?
+        # TODO(zah) penalize peer?
         debug "Failed to decompress gossip payload"
     except CatchableError as err:
       debug "Gossip validation error",

beacon_chain/merkle_minimal.nim

@@ -19,8 +19,6 @@ import
   ../../beacon_chain/spec/[datatypes, digest],
   ../../beacon_chain/ssz/merkleization
 
-# TODO All tests need to be moved to the test suite.
-
 const depositContractLimit* = Limit(1'u64 shl DEPOSIT_CONTRACT_TREE_DEPTH)
 
 func attachMerkleProofs*(deposits: var openArray[Deposit]) =

beacon_chain/network_metadata.nim

@@ -13,7 +13,7 @@ import
 # binary). It makes sense to keep the file small and separated from the rest
 # of the module in order go gain maximum efficiency in incremental compilation.
 #
-# TODO:
+# TODO(zah):
 # We can compress the embedded states with snappy before embedding them here.
 
 {.push raises: [Defect].}
@@ -151,7 +151,7 @@ const
                            # that there are no constant overrides
       eth1Network: some mainnet,
       runtimePreset: mainnetRuntimePreset,
-      # TODO Add bootstrap nodes for mainnet
+      # TODO(zah) Add bootstrap nodes for mainnet
       bootstrapNodes: @[],
       depositContractAddress: Eth1Address.fromHex "0x00000000219ab540356cBB839Cbe05303d7705Fa",
       depositContractDeployedAt: "11052984",

beacon_chain/nimbus_beacon_node.nim

@@ -204,7 +204,7 @@ proc init*(T: type BeaconNode,
       error "Failed to initialize database", err = e.msg
       quit 1
 
-  # TODO check that genesis given on command line (if any) matches database
+  # TODO(zah) check that genesis given on command line (if any) matches database
   let
     chainDagFlags = if conf.verifyFinalization: {verifyFinalization}
                      else: {}
@@ -234,8 +234,8 @@ proc init*(T: type BeaconNode,
      conf.web3Url.len > 0 and
      conf.depositContractAddress.isSome and
      conf.depositContractDeployedAt.isSome:
-    # TODO if we don't have any validators attached,
+    # TODO(zah) if we don't have any validators attached,
-    #      we don't need a mainchain monitor
+    #           we don't need a mainchain monitor
     eth1Monitor = await startEth1Monitor(db, eth1Network, conf)
 
   let rpcServer = if conf.rpcEnabled:

beacon_chain/rpc/beacon_api.nim

@@ -33,7 +33,6 @@ proc parsePubkey(str: string): ValidatorPubKey =
     raise newException(CatchableError, "Not a valid public key")
   return pubkeyRes[]
 
-# TODO currently this function throws if the validator isn't found - is this OK?
 proc getValidatorInfoFromValidatorId(
     state: BeaconState,
     current_epoch: Epoch,

beacon_chain/rpc/node_api.nim

@@ -17,10 +17,10 @@ template unimplemented() =
 
 proc installNodeApiHandlers*(rpcServer: RpcServer, node: BeaconNode) =
   rpcServer.rpc("get_v1_node_identity") do () -> NodeIdentityTuple:
-    # TODO rest of fields
     return (
       peer_id: node.network.peerId(),
       enr: node.network.enrRecord(),
+      # TODO rest of fields
       p2p_addresses: newSeq[MultiAddress](0),
       discovery_addresses: newSeq[MultiAddress](0),
       metadata: (0'u64, "")

beacon_chain/spec/presets/v0_12_3/mainnet.nim

@@ -163,6 +163,6 @@ const
   # https://github.com/ethereum/eth2.0-specs/blob/v0.12.3/configs/mainnet/phase0.yaml#L52
 
   # Ethereum PoW Mainnet
-  # TODO These violate the spec (this is a temporary change to allow `make medalla` to work)
+  # TODO(zah) These violate the spec (this is a temporary change to allow `make medalla` to work)
   DEPOSIT_CHAIN_ID* = 5
   DEPOSIT_NETWORK_ID* = 5

beacon_chain/spec/presets/v1_0_0/mainnet.nim

@@ -171,6 +171,6 @@ const
   # https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L51
 
   # Ethereum PoW Mainnet
-  # TODO These violate the spec (this is a temporary change to allow `make medalla` to work)
+  # TODO(zah) These violate the spec (this is a temporary change to allow `make medalla` to work)
   DEPOSIT_CHAIN_ID* = 5
   DEPOSIT_NETWORK_ID* = 5

beacon_chain/ssz/bytes_reader.nim

@@ -159,12 +159,9 @@ func readSszValue*[T](input: openArray[byte],
         ex.elementSize = elemSize
         raise ex
       val.setOutputSize input.len div elemSize
-      trs "READING LIST WITH LEN ", val.len
       for i in 0 ..< val.len:
-        trs "TRYING TO READ LIST ELEM ", i
         let offset = i * elemSize
         readSszValue(input.toOpenArray(offset, offset + elemSize - 1), val[i])
-      trs "LIST READING COMPLETE"
 
     else:
       if input.len == 0:
@@ -175,10 +172,7 @@ func readSszValue*[T](input: openArray[byte],
         raise newException(MalformedSszError, "SSZ input of insufficient size")
 
       var offset = readOffset 0
-      trs "GOT OFFSET ", offset
-
       let resultLen = offset div offsetSize
-      trs "LEN ", resultLen
 
       if resultLen == 0:
         # If there are too many elements, other constraints detect problems
@@ -197,11 +191,8 @@ func readSszValue*[T](input: openArray[byte],
 
       readSszValue(input.toOpenArray(offset, input.len - 1), val[resultLen - 1])
 
-  # TODO: Should be possible to remove BitArray from here
   elif val is UintN|bool:
-    trs "READING BASIC TYPE ", typetraits.name(T), "  input=", input.len
     val = fromSszBytes(T, input)
-    trs "RESULT WAS ", repr(val)
 
   elif val is BitArray:
     if sizeof(val) != input.len:
@@ -218,7 +209,6 @@ func readSszValue*[T](input: openArray[byte],
 
     enumInstanceSerializedFields(val, fieldName, field):
       const boundingOffsets = getFieldBoundingOffsets(T, fieldName)
-      trs "BOUNDING OFFSET FOR FIELD ", fieldName, " = ", boundingOffsets
 
       # type FieldType = type field # buggy
       # For some reason, Nim gets confused about the alias here. This could be a
@@ -233,7 +223,6 @@ func readSszValue*[T](input: openArray[byte],
         const
           startOffset = boundingOffsets[0]
           endOffset = boundingOffsets[1]
-        trs "FIXED FIELD ", startOffset, "-", endOffset
       else:
         let
           startOffset = readOffsetUnchecked(boundingOffsets[0])
@@ -244,7 +233,6 @@ func readSszValue*[T](input: openArray[byte],
           if startOffset != minimallyExpectedSize:
             raise newException(MalformedSszError, "SSZ object dynamic portion starts at invalid offset")
 
-        trs "VAR FIELD ", startOffset, "-", endOffset
         if startOffset > endOffset:
           raise newException(MalformedSszError, "SSZ field offsets are not monotonically increasing")
         elif endOffset > inputLen:
@@ -254,16 +242,10 @@ func readSszValue*[T](input: openArray[byte],
 
       # TODO The extra type escaping here is a work-around for a Nim issue:
       when type(field) is type(SszType):
-        trs "READING NATIVE ", fieldName, ": ", name(SszType)
-
-        # TODO passing in `FieldType` instead of `type(field)` triggers a
-        #      bug in the compiler
         readSszValue(
           input.toOpenArray(int(startOffset), int(endOffset - 1)),
           field)
-        trs "READING COMPLETE ", fieldName
       else:
-        trs "READING FOREIGN ", fieldName, ": ", name(SszType)
         field = fromSszBytes(
           type(field),
           input.toOpenArray(int(startOffset), int(endOffset - 1)))

beacon_chain/ssz/merkleization.nim

@@ -462,8 +462,6 @@ func chunkedHashTreeRootForBasicTypes[T](merkleizer: var SszMerkleizerImpl,
 func bitListHashTreeRoot(merkleizer: var SszMerkleizerImpl, x: BitSeq): Eth2Digest =
   # TODO: Switch to a simpler BitList representation and
   #       replace this with `chunkedHashTreeRoot`
-  trs "CHUNKIFYING BIT SEQ WITH TOP INDEX ", merkleizer.topIndex
-
   var
     totalBytes = bytes(x).len
     lastCorrectedByte = bytes(x)[^1]

beacon_chain/ssz/ssz_serialization.nim

@@ -233,6 +233,6 @@ proc readValue*[T](r: var SszReader, val: var T) {.raises: [Defect, MalformedSsz
     else:
       raise newException(MalformedSszError, "SSZ input of insufficient size")
   else:
-    # TODO Read the fixed portion first and precisely measure the size of
+    # TODO(zah) Read the fixed portion first and precisely measure the
-    # the dynamic portion to consume the right number of bytes.
+    # size of the dynamic portion to consume the right number of bytes.
     readSszValue(r.stream.read(r.stream.len.get), val, r.updateRoot)

beacon_chain/sync_protocol.nim

@@ -99,7 +99,8 @@ p2pProtocol BeaconSync(version = 1,
     # makes the incoming flag unreliable / obsolete by the time we get to
     # this point - instead of making assumptions, we'll just send a status
     # message redundantly.
-    # TODO the spec does not prohibit sending the extra status message on
+    # TODO(zah)
+    #      the spec does not prohibit sending the extra status message on
     #      incoming connections, but it should not be necessary - this would
     #      need a dedicated flow in libp2p that resolves the race conditions -
     #      this needs more thinking around the ordering of events and the

beacon_chain/validator_duties.nim

@@ -35,15 +35,6 @@ declareCounter beacon_blocks_proposed,
 
 logScope: topics = "beacval"
 
-# # TODO: This procedure follows insecure scheme of creating directory without
-# # any permissions and writing file without any permissions.
-# proc saveValidatorKey*(keyName, key: string, conf: BeaconNodeConf) =
-#   let validatorsDir = conf.validatorsDir
-#   let outputFile = validatorsDir / keyName
-#   createDir validatorsDir
-#   writeFile(outputFile, key)
-#   notice "Imported validator key", file = outputFile
-
 proc checkValidatorInRegistry(state: BeaconState,
                               pubKey: ValidatorPubKey) =
   let idx = state.validators.asSeq.findIt(it.pubKey == pubKey)

tests/official/test_fixture_state_transition_epoch.nim

@@ -21,12 +21,6 @@ import
 from ../../beacon_chain/spec/beaconstate import process_registry_updates
   # XXX: move to state_transition_epoch?
 
-# TODO: parsing SSZ
-#       can overwrite the calling function stack
-#       https://github.com/status-im/nimbus-eth2/issues/369
-#
-# We store the state on the heap to avoid that
-
 template runSuite(suiteDir, testName: string, transitionProc: untyped{ident}, useCache: static bool): untyped =
   # We wrap the tests in a proc to avoid running out of globals
   # in the future: Nim supports up to 3500 globals
@@ -39,6 +33,7 @@ template runSuite(suiteDir, testName: string, transitionProc: untyped{ident}, us
 
         let unitTestName = testDir.rsplit(DirSep, 1)[1]
         timedTest testName & " - " & unitTestName & preset():
+          # BeaconState objects are stored on the heap to avoid stack overflow
           var preState = newClone(parseTest(testDir/"pre.ssz", SSZ, BeaconState))
           let postState = newClone(parseTest(testDir/"post.ssz", SSZ, BeaconState))