status-im
/
nim-eth
mirror of https://github.com/status-im/nim-eth.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

Add update of ENR on newly discovered address

This commit is contained in:
kdeme 2021-01-26 14:11:22 +01:00 committed by zah
parent 689eef2c11
commit bfbad64d83
10 changed files with 177 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
eth/p2p/discoveryv5/dcli.nim
View File

@ -14,12 +14,12 @@ type
DiscoveryConf* = object
logLevel* {.
defaultValue: LogLevel.DEBUG
desc: "Sets the log level."
desc: "Sets the log level"
name: "log-level" .}: LogLevel
udpPort* {.
defaultValue: 9009
desc: "UDP listening port."
desc: "UDP listening port"
name: "udp-port" .}: uint16
listenAddress* {.
@ -28,32 +28,39 @@ type
name: "listen-address" }: ValidIpAddress
bootnodes* {.
desc: "ENR URI of node to bootstrap discovery with. Argument may be repeated."
desc: "ENR URI of node to bootstrap discovery with. Argument may be repeated"
name: "bootnode" .}: seq[enr.Record]
nat* {.
desc: "Specify method to use for determining public address. " &
"Must be one of: any, none, upnp, pmp, extip:<IP>."
"Must be one of: any, none, upnp, pmp, extip:<IP>"
defaultValue: "any" .}: string
enrAutoUpdate* {.
defaultValue: false
desc: "Discovery can automatically update its ENR with the IP address " &
"and UDP port as seen by other nodes it communicates with. " &
"This option allows to enable/disable this functionality"
name: "enr-auto-update" .}: bool
nodeKey* {.
desc: "P2P node private key as hex.",
desc: "P2P node private key as hex",
defaultValue: PrivateKey.random(keys.newRng()[])
name: "nodekey" .}: PrivateKey
metricsEnabled* {.
defaultValue: false
desc: "Enable the metrics server."
desc: "Enable the metrics server"
name: "metrics" .}: bool
metricsAddress* {.
defaultValue: defaultAdminListenAddress(config)
desc: "Listening address of the metrics server."
desc: "Listening address of the metrics server"
name: "metrics-address" .}: ValidIpAddress
metricsPort* {.
defaultValue: 8008
desc: "Listening HTTP port of the metrics server."
desc: "Listening HTTP port of the metrics server"
name: "metrics-port" .}: Port
case cmd* {.
@ -163,7 +170,8 @@ proc run(config: DiscoveryConf) =
let
(ip, tcpPort, udpPort) = setupNat(config)
d = newProtocol(config.nodeKey, ip, tcpPort, udpPort,
bootstrapRecords = config.bootnodes, bindIp = config.listenAddress)
bootstrapRecords = config.bootnodes, bindIp = config.listenAddress,
enrAutoUpdate = config.enrAutoUpdate)
d.open()

16
eth/p2p/discoveryv5/enr.nim
View File

@ -144,7 +144,8 @@ template toFieldPair*(key: string, value: auto): FieldPair =
(key, toField(value))
proc addAddress(fields: var seq[FieldPair], ip: Option[ValidIpAddress],
tcpPort, udpPort: Port) =
tcpPort, udpPort: Option[Port]) =
# It makes sense to add ports only when there is an IP provided
if ip.isSome():
let
ipExt = ip.get()
@ -152,16 +153,15 @@ proc addAddress(fields: var seq[FieldPair], ip: Option[ValidIpAddress],
fields.add(if isV6: ("ip6", ipExt.address_v6.toField)
else: ("ip", ipExt.address_v4.toField))
fields.add(((if isV6: "tcp6" else: "tcp"), tcpPort.uint16.toField))
fields.add(((if isV6: "udp6" else: "udp"), udpPort.uint16.toField))
else:
fields.add(("tcp", tcpPort.uint16.toField))
fields.add(("udp", udpPort.uint16.toField))
if tcpPort.isSome():
fields.add(((if isV6: "tcp6" else: "tcp"), tcpPort.get().uint16.toField))
if udpPort.isSome():
fields.add(((if isV6: "udp6" else: "udp"), udpPort.get().uint16.toField))
proc init*(T: type Record, seqNum: uint64,
pk: PrivateKey,
ip: Option[ValidIpAddress],
tcpPort, udpPort: Port,
tcpPort, udpPort: Option[Port],
extraFields: openarray[FieldPair] = []):
EnrResult[T] =
## Initialize a `Record` with given sequence number, private key, optional
@ -281,7 +281,7 @@ proc update*(record: var Record, pk: PrivateKey,
proc update*(r: var Record, pk: PrivateKey,
ip: Option[ValidIpAddress],
tcpPort, udpPort: Port,
tcpPort, udpPort: Option[Port] = none[Port](),
extraFields: openarray[FieldPair] = []):
EnrResult[void] =
## Update a `Record` with given ip address, tcp port, udp port and optional

16
eth/p2p/discoveryv5/node.nim
View File

@ -48,14 +48,20 @@ func newNode*(r: Record): Result[Node, cstring] =
ok(Node(id: pk.get().toNodeId(), pubkey: pk.get(), record: r,
address: none(Address)))
proc updateNode*(n: Node, pk: PrivateKey, ip: Option[ValidIpAddress],
tcpPort, udpPort: Port, extraFields: openarray[FieldPair] = []):
Result[void, cstring] =
proc update*(n: Node, pk: PrivateKey, ip: Option[ValidIpAddress],
tcpPort, udpPort: Option[Port] = none[Port](),
extraFields: openarray[FieldPair] = []): Result[void, cstring] =
? n.record.update(pk, ip, tcpPort, udpPort, extraFields)
if ip.isSome():
let a = Address(ip: ip.get(), port: udpPort)
n.address = some(a)
if udpPort.isSome():
let a = Address(ip: ip.get(), port: udpPort.get())
n.address = some(a)
elif n.address.isSome():
let a = Address(ip: ip.get(), port: n.address.get().port)
n.address = some(a)
else:
n.address = none(Address)
else:
n.address = none(Address)

55
eth/p2p/discoveryv5/protocol.nim
View File

@ -1,5 +1,5 @@
# nim-eth - Node Discovery Protocol v5
# Copyright (c) 2020 Status Research & Development GmbH
# Copyright (c) 2020-2021 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, (LICENSE-APACHEv2)
# * MIT license (LICENSE-MIT)
@ -106,6 +106,8 @@ const
## refresh the routing table.
revalidateMax = 10000 ## Revalidation of a peer is done between 0 and this
## value in milliseconds
ipMajorityInterval = 5.minutes ## Interval for checking the latest IP:Port
## majority and updating this when ENR auto update is set.
initialLookups = 1 ## Amount of lookups done when populating the routing table
handshakeTimeout* = 2.seconds ## timeout for the reply on the
## whoareyou message
@ -124,9 +126,11 @@ type
awaitedMessages: Table[(NodeId, RequestId), Future[Option[Message]]]
refreshLoop: Future[void]
revalidateLoop: Future[void]
ipMajorityLoop: Future[void]
lastLookup: chronos.Moment
bootstrapRecords*: seq[Record]
ipVote: IpVote
enrAutoUpdate: bool
rng*: ref BrHmacDrbgContext
PendingRequest = object
@ -890,21 +894,46 @@ proc refreshLoop(d: Protocol) {.async, raises: [Exception, Defect].} =
trace "Discovered nodes in random target query", nodes = randomQuery.len
debug "Total nodes in discv5 routing table", total = d.routingTable.len()
let majority = d.ipVote.majority()
if majority.isSome():
let address = majority.get()
debug "Majority on voted address", address
await sleepAsync(refreshInterval)
except CancelledError:
trace "refreshLoop canceled"
proc ipMajorityLoop(d: Protocol) {.async, raises: [Exception, Defect].} =
try:
while true:
let majority = d.ipVote.majority()
if majority.isSome():
if d.localNode.address != majority:
let address = majority.get()
let previous = d.localNode.address
if d.enrAutoUpdate:
let res = d.localNode.update(d.privateKey,
ip = some(address.ip), udpPort = some(address.port))
if res.isErr:
warn "Failed updating ENR with newly discovered external address",
majority, previous, error = res.error
else:
info "Updated ENR with newly discovered external address",
majority, previous, uri = toURI(d.localNode.record)
else:
warn "Discovered new external address but ENR auto update is off",
majority, previous
else:
debug "Discovered external address matches current address", majority,
current = d.localNode.address
await sleepAsync(ipMajorityInterval)
except CancelledError:
trace "ipMajorityLoop canceled"
proc newProtocol*(privKey: PrivateKey,
externalIp: Option[ValidIpAddress], tcpPort, udpPort: Port,
externalIp: Option[ValidIpAddress],
tcpPort, udpPort: Port,
localEnrFields: openarray[(string, seq[byte])] = [],
bootstrapRecords: openarray[Record] = [],
previousRecord = none[enr.Record](),
bindIp = IPv4_any(),
enrAutoUpdate = false,
tableIpLimits = DefaultTableIpLimits,
rng = newRng()):
Protocol {.raises: [Defect].} =
@ -920,11 +949,11 @@ proc newProtocol*(privKey: PrivateKey,
var record: Record
if previousRecord.isSome():
record = previousRecord.get()
record.update(privKey, externalIp, tcpPort, udpPort,
record.update(privKey, externalIp, some(tcpPort), some(udpPort),
extraFields).expect("Record within size limits and correct key")
else:
record = enr.Record.init(1, privKey, externalIp, tcpPort, udpPort,
extraFields).expect("Record within size limits")
record = enr.Record.init(1, privKey, externalIp, some(tcpPort),
some(udpPort), extraFields).expect("Record within size limits")
let node = newNode(record).expect("Properly initialized record")
# TODO Consider whether this should be a Defect
@ -938,6 +967,7 @@ proc newProtocol*(privKey: PrivateKey,
sessions: Sessions.init(256)),
bootstrapRecords: @bootstrapRecords,
ipVote: IpVote.init(),
enrAutoUpdate: enrAutoUpdate,
rng: rng)
result.routingTable.init(node, DefaultBitsPerHop, tableIpLimits, rng)
@ -959,6 +989,7 @@ proc open*(d: Protocol) {.raises: [Exception, Defect].} =
proc start*(d: Protocol) {.raises: [Exception, Defect].} =
d.refreshLoop = refreshLoop(d)
d.revalidateLoop = revalidateLoop(d)
d.ipMajorityLoop = ipMajorityLoop(d)
proc close*(d: Protocol) {.raises: [Exception, Defect].} =
doAssert(not d.transp.closed)
@ -968,6 +999,8 @@ proc close*(d: Protocol) {.raises: [Exception, Defect].} =
d.revalidateLoop.cancel()
if not d.refreshLoop.isNil:
d.refreshLoop.cancel()
if not d.ipMajorityLoop.isNil:
d.ipMajorityLoop.cancel()
d.transp.close()
@ -979,5 +1012,7 @@ proc closeWait*(d: Protocol) {.async, raises: [Exception, Defect].} =
await d.revalidateLoop.cancelAndWait()
if not d.refreshLoop.isNil:
await d.refreshLoop.cancelAndWait()
if not d.ipMajorityLoop.isNil:
await d.ipMajorityLoop.cancelAndWait()
await d.transp.closeWait()

10
tests/fuzzing/discoveryv5/fuzz_decode_packet.nim
View File

@ -1,6 +1,6 @@
import
testutils/fuzzing, stew/shims/net, stew/byteutils,
eth/p2p/discoveryv5/[encodingv1, enr, sessions, node]
eth/p2p/discoveryv5/[encoding, enr, sessions, node]
init:
const
@ -12,13 +12,13 @@ init:
privKeyB = PrivateKey.fromHex(nodeBKey)[] # receive -> decode
enrRecA = enr.Record.init(1, privKeyA,
some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
nodeA = newNode(enrRecA).expect("Properly initialized record")
enrRecB = enr.Record.init(1, privKeyB,
some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
nodeB = newNode(enrRecB).expect("Properly initialized record")
var codecB = Codec(localNode: nodeB, privKey: privKeyB,

2
tests/p2p/discv5_test_helper.nim
View File

@ -38,7 +38,7 @@ proc generateNode*(privKey: PrivateKey, port: int = 20302,
localEnrFields: openarray[FieldPair] = []): Node =
let port = Port(port)
let enr = enr.Record.init(1, privKey, some(ip),
port, port, localEnrFields).expect("Properly intialized private key")
some(port), some(port), localEnrFields).expect("Properly intialized private key")
result = newNode(enr).expect("Properly initialized node")
proc nodeAndPrivKeyAtDistance*(n: Node, rng: var BrHmacDrbgContext, d: uint32,

30
tests/p2p/test_discoveryv5.nim
View File

@ -463,7 +463,7 @@ procSuite "Discovery v5 Tests":
port = Port(9000)
fromNoderecord = enr.Record.init(1, PrivateKey.random(rng[]),
some(ValidIpAddress.init("11.12.13.14")),
port, port)[]
some(port), some(port))[]
fromNode = newNode(fromNoderecord)[]
pk = PrivateKey.random(rng[])
targetDistance = logDist(fromNode.id, pk.toPublicKey().toNodeId())
@ -471,7 +471,8 @@ procSuite "Discovery v5 Tests":
block: # Duplicates
let
record = enr.Record.init(
1, pk, some(ValidIpAddress.init("12.13.14.15")), port, port)[]
1, pk, some(ValidIpAddress.init("12.13.14.15")),
some(port), some(port))[]
# Exact duplicates
var records = @[record, record]
@ -480,7 +481,8 @@ procSuite "Discovery v5 Tests":
# Node id duplicates
let recordSameId = enr.Record.init(
1, pk, some(ValidIpAddress.init("212.13.14.15")), port, port)[]
1, pk, some(ValidIpAddress.init("212.13.14.15")),
some(port), some(port))[]
records.add(recordSameId)
nodes = verifyNodesRecords(records, fromNode, targetDistance)
check nodes.len == 1
@ -488,7 +490,7 @@ procSuite "Discovery v5 Tests":
block: # No address
let
recordNoAddress = enr.Record.init(
1, pk, none(ValidIpAddress), port, port)[]
1, pk, none(ValidIpAddress), some(port), some(port))[]
records = [recordNoAddress]
test = verifyNodesRecords(records, fromNode, targetDistance)
check test.len == 0
@ -497,7 +499,7 @@ procSuite "Discovery v5 Tests":
let
recordInvalidAddress = enr.Record.init(
1, pk, some(ValidIpAddress.init("10.1.2.3")),
port, port)[]
some(port), some(port))[]
records = [recordInvalidAddress]
test = verifyNodesRecords(records, fromNode, targetDistance)
check test.len == 0
@ -505,7 +507,8 @@ procSuite "Discovery v5 Tests":
block: # Invalid address - loopback
let
recordInvalidAddress = enr.Record.init(
1, pk, some(ValidIpAddress.init("127.0.0.1")), port, port)[]
1, pk, some(ValidIpAddress.init("127.0.0.1")),
some(port), some(port))[]
records = [recordInvalidAddress]
test = verifyNodesRecords(records, fromNode, targetDistance)
check test.len == 0
@ -513,7 +516,8 @@ procSuite "Discovery v5 Tests":
block: # Invalid distance
let
recordInvalidDistance = enr.Record.init(
1, pk, some(ValidIpAddress.init("12.13.14.15")), port, port)[]
1, pk, some(ValidIpAddress.init("12.13.14.15")),
some(port), some(port))[]
records = [recordInvalidDistance]
test = verifyNodesRecords(records, fromNode, 0'u32)
check test.len == 0
@ -530,8 +534,8 @@ procSuite "Discovery v5 Tests":
let
privKey = PrivateKey.random(rng[])
enrRec = enr.Record.init(1, privKey,
some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
sendNode = newNode(enrRec).expect("Properly initialized record")
var codec = Codec(localNode: sendNode, privKey: privKey, sessions: Sessions.init(5))
@ -559,8 +563,8 @@ procSuite "Discovery v5 Tests":
let
privKey = PrivateKey.random(rng[])
enrRec = enr.Record.init(1, privKey,
some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
sendNode = newNode(enrRec).expect("Properly initialized record")
var codec = Codec(localNode: sendNode, privKey: privKey, sessions: Sessions.init(5))
for i in 0 ..< 5:
@ -590,8 +594,8 @@ procSuite "Discovery v5 Tests":
a = localAddress(20303)
privKey = PrivateKey.random(rng[])
enrRec = enr.Record.init(1, privKey,
some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
sendNode = newNode(enrRec).expect("Properly initialized record")
var codec = Codec(localNode: sendNode, privKey: privKey, sessions: Sessions.init(5))

18
tests/p2p/test_discoveryv5_encoding.nim
View File

@ -219,13 +219,13 @@ suite "Discovery v5.1 Packet Encodings Test Vectors":
privKeyB = PrivateKey.fromHex(nodeBKey)[] # receive -> decode
enrRecA = enr.Record.init(1, privKeyA,
some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
nodeA = newNode(enrRecA).expect("Properly initialized record")
enrRecB = enr.Record.init(1, privKeyB,
some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
nodeB = newNode(enrRecB).expect("Properly initialized record")
var
@ -432,12 +432,14 @@ suite "Discovery v5.1 Additional Encode/Decode":
privKeyA = PrivateKey.random(rng[]) # sender -> encode
privKeyB = PrivateKey.random(rng[]) # receiver -> decode
enrRecA = enr.Record.init(1, privKeyA, some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
enrRecA = enr.Record.init(1, privKeyA,
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
nodeA = newNode(enrRecA).expect("Properly initialized record")
enrRecB = enr.Record.init(1, privKeyB, some(ValidIpAddress.init("127.0.0.1")), Port(9000),
Port(9000)).expect("Properly intialized private key")
enrRecB = enr.Record.init(1, privKeyB,
some(ValidIpAddress.init("127.0.0.1")), some(Port(9000)),
some(Port(9000))).expect("Properly intialized private key")
nodeB = newNode(enrRecB).expect("Properly initialized record")
var

72
tests/p2p/test_enr.nim
View File

@ -60,8 +60,9 @@ suite "ENR":
let
keypair = KeyPair.random(rng[])
ip = ValidIpAddress.init("10.20.30.40")
port = some(Port(9000))
enr = Record.init(
100, keypair.seckey, some(ip), Port(9000), Port(9000),@[])[]
100, keypair.seckey, some(ip), port, port,@[])[]
typedEnr = get enr.toTypedRecord()
check:
@ -80,8 +81,9 @@ suite "ENR":
test "ENR without address":
let
keypair = KeyPair.random(rng[])
port = some(Port(9000))
enr = Record.init(
100, keypair.seckey, none(ValidIpAddress), Port(9000), Port(9000))[]
100, keypair.seckey, none(ValidIpAddress), port, port)[]
typedEnr = get enr.toTypedRecord()
check:
@ -89,11 +91,8 @@ suite "ENR":
typedEnr.secp256k1.get() == keypair.pubkey.toRawCompressed()
typedEnr.ip.isNone()
typedEnr.tcp.isSome()
typedEnr.tcp.get() == 9000
typedEnr.udp.isSome()
typedEnr.udp.get() == 9000
typedEnr.tcp.isNone()
typedEnr.udp.isNone()
typedEnr.ip6.isNone()
typedEnr.tcp6.isNone()
@ -115,7 +114,7 @@ suite "ENR":
pk = PrivateKey.fromHex(
"5d2908f3f09ea1ff2e327c3f623159639b00af406e9009de5fd4b910fc34049d")[]
newField = toFieldPair("test", 123'u)
var r = Record.init(1, pk, none(ValidIpAddress), Port(9000), Port(9000))[]
var r = Record.init(1, pk, none(ValidIpAddress), none(Port), none(Port))[]
block: # Insert new k:v pair, update of seqNum should occur.
let updated = r.update(pk, [newField])
@ -182,20 +181,63 @@ suite "ENR":
let
pk = PrivateKey.fromHex(
"5d2908f3f09ea1ff2e327c3f623159639b00af406e9009de5fd4b910fc34049d")[]
var r = Record.init(1, pk, none(ValidIpAddress), Port(9000), Port(9000))[]
var r = Record.init(1, pk, none(ValidIpAddress),
some(Port(9000)), some(Port(9000)))[]
block:
let updated = r.update(pk, none(ValidIpAddress), Port(9000), Port(9000))
let updated = r.update(pk, none(ValidIpAddress),
some(Port(9000)), some(Port(9000)))
check updated.isOk()
check:
r.get("tcp", uint) == 9000
r.get("udp", uint) == 9000
r.tryGet("ip", uint).isNone()
r.tryGet("tcp", uint).isNone()
r.tryGet("udp", uint).isNone()
r.seqNum == 1
block:
let updated = r.update(pk, none(ValidIpAddress), Port(9001), Port(9002))
let updated = r.update(pk, none(ValidIpAddress),
some(Port(9001)), some(Port(9002)))
check updated.isOk()
check:
r.get("tcp", uint) == 9001
r.get("udp", uint) == 9002
r.tryGet("ip", uint).isNone()
r.tryGet("tcp", uint).isNone()
r.tryGet("udp", uint).isNone()
r.seqNum == 1
block:
let updated = r.update(pk, some(ValidIpAddress.init("10.20.30.40")),
some(Port(9000)), some(Port(9000)))
check updated.isOk()
let typedEnr = r.toTypedRecord().get()
check:
typedEnr.ip.isSome()
typedEnr.ip.get() == [byte 10, 20, 30, 40]
typedEnr.tcp.isSome()
typedEnr.tcp.get() == 9000
typedEnr.udp.isSome()
typedEnr.udp.get() == 9000
r.seqNum == 2
block:
let updated = r.update(pk, some(ValidIpAddress.init("10.20.30.40")),
some(Port(9001)), some(Port(9001)))
check updated.isOk()
let typedEnr = r.toTypedRecord().get()
check:
typedEnr.ip.isSome()
typedEnr.ip.get() == [byte 10, 20, 30, 40]
typedEnr.tcp.isSome()
typedEnr.tcp.get() == 9001
typedEnr.udp.isSome()
typedEnr.udp.get() == 9001
r.seqNum == 3

10
tests/p2p/test_routing_table.nim
View File

@ -472,8 +472,9 @@ suite "Routing Table Tests":
let updatedNode1 = generateNode(pk)
# Need to do an update to get seqNum increased
let updated = updatedNode1.updateNode(pk,
some(ValidIpAddress.init("192.168.0.1")), Port(9000), Port(9000))
let updated = updatedNode1.update(pk,
some(ValidIpAddress.init("192.168.0.1")),
some(Port(9000)), some(Port(9000)))
check updated.isOk()
check table.addNode(updatedNode1) == Existing
@ -524,8 +525,9 @@ suite "Routing Table Tests":
for i in 0..<DefaultTableIpLimits.bucketIpLimit + 1:
# Need to do an update to get seqNum increased
let updated = updatedNode1.updateNode(pk,
some(ValidIpAddress.init("192.168.0.1")), Port(9000+i), Port(9000+i))
let updated = updatedNode1.update(pk,
some(ValidIpAddress.init("192.168.0.1")),
some(Port(9000+i)), some(Port(9000+i)))
check updated.isOk()
check table.addNode(updatedNode1) == Existing