nim-eth/tests/p2p/discv5_test_helper.nim

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import
stew/shims/net, bearssl, chronos,
../../eth/keys,
../../eth/p2p/discoveryv5/[enr, node, routing_table],
../../eth/p2p/discoveryv5/protocol as discv5_protocol
export net
proc localAddress*(port: int): Address =
Address(ip: ValidIpAddress.init("127.0.0.1"), port: Port(port))
proc initDiscoveryNode*(rng: ref BrHmacDrbgContext, privKey: PrivateKey,
address: Address,
bootstrapRecords: openArray[Record] = [],
localEnrFields: openArray[(string, seq[byte])] = [],
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previousRecord = none[enr.Record]()):
discv5_protocol.Protocol =
# set bucketIpLimit to allow bucket split
let tableIpLimits = TableIpLimits(tableIpLimit: 1000, bucketIpLimit: 24)
result = newProtocol(privKey,
some(address.ip),
some(address.port), some(address.port),
bindPort = address.port,
bootstrapRecords = bootstrapRecords,
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localEnrFields = localEnrFields,
previousRecord = previousRecord,
tableIpLimits = tableIpLimits,
rng = rng)
result.open()
proc nodeIdInNodes*(id: NodeId, nodes: openArray[Node]): bool =
for n in nodes:
if id == n.id: return true
proc generateNode*(privKey: PrivateKey, port: int = 20302,
ip: ValidIpAddress = ValidIpAddress.init("127.0.0.1"),
localEnrFields: openArray[FieldPair] = []): Node =
let port = Port(port)
let enr = enr.Record.init(1, privKey, some(ip),
some(port), some(port), localEnrFields).expect("Properly intialized private key")
result = newNode(enr).expect("Properly initialized node")
proc generateNRandomNodes*(rng: ref BrHmacDrbgContext, n: int): seq[Node] =
var res = newSeq[Node]()
for i in 1..n:
let node = generateNode(PrivateKey.random(rng[]))
res.add(node)
res
proc nodeAndPrivKeyAtDistance*(n: Node, rng: var BrHmacDrbgContext, d: uint32,
ip: ValidIpAddress = ValidIpAddress.init("127.0.0.1")): (Node, PrivateKey) =
while true:
let pk = PrivateKey.random(rng)
let node = generateNode(pk, ip = ip)
if logDistance(n.id, node.id) == d:
return (node, pk)
proc nodeAtDistance*(n: Node, rng: var BrHmacDrbgContext, d: uint32,
ip: ValidIpAddress = ValidIpAddress.init("127.0.0.1")): Node =
let (node, _) = n.nodeAndPrivKeyAtDistance(rng, d, ip)
node
proc nodesAtDistance*(
n: Node, rng: var BrHmacDrbgContext, d: uint32, amount: int,
ip: ValidIpAddress = ValidIpAddress.init("127.0.0.1")): seq[Node] =
for i in 0..<amount:
result.add(nodeAtDistance(n, rng, d, ip))
proc nodesAtDistanceUniqueIp*(
n: Node, rng: var BrHmacDrbgContext, d: uint32, amount: int,
ip: ValidIpAddress = ValidIpAddress.init("127.0.0.1")): seq[Node] =
var ta = initTAddress(ip, Port(0))
for i in 0..<amount:
ta.inc()
result.add(nodeAtDistance(n, rng, d, ValidIpAddress.init(ta.address())))
proc addSeenNode*(d: discv5_protocol.Protocol, n: Node): bool =
# Add it as a seen node, warning: for testing convenience only!
n.seen = true
d.addNode(n)