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Fix lookupDistances function and make it public (#399)

This commit is contained in:
KonradStaniec 2021-09-10 17:26:22 +02:00 committed by GitHub
parent df6020832b
commit e219547d64
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2 changed files with 16 additions and 6 deletions
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13
eth/p2p/discoveryv5/protocol.nim
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@ -654,15 +654,16 @@ proc talkreq*(d: Protocol, toNode: Node, protocol, request: seq[byte]):
discovery_message_requests_outgoing.inc(labelValues = ["no_response"])
return err("Talk response message not received in time")
proc lookupDistances(target, dest: NodeId): seq[uint16] =
proc lookupDistances*(target, dest: NodeId): seq[uint16] =
let td = logDist(target, dest)
let tdAsInt = int(td)
result.add(td)
var i = 1'u16
var i = 1
while result.len < lookupRequestLimit:
if td + i < 256:
result.add(td + i)
if td - i > 0'u16:
result.add(td - i)
if tdAsInt + i < 256:
result.add(td + uint16(i))
if tdAsInt - i > 0:
result.add(td - uint16(i))
inc i
proc lookupWorker(d: Protocol, destNode: Node, target: NodeId):

9
tests/p2p/test_discoveryv5.nim
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@ -527,6 +527,15 @@ procSuite "Discovery v5 Tests":
test = verifyNodesRecords(records, fromNode, 0'u16)
check test.len == 0
test "Calculate lookup distances":
# Log distance between zeros is zero
let dist = lookupDistances(u256(0), u256(0))
check dist == @[0'u16, 1, 2]
# Log distance between zero and one is one
let dist1 = lookupDistances(u256(0), u256(1))
check dist1 == @[1'u16, 2, 3]
asyncTest "Handshake cleanup: different ids":
# Node to test the handshakes on.
let receiveNode = initDiscoveryNode(