Builders (#558)

* use a builder pattern to build the switch (#551)

* use a builder pattern to build the switch

* with with

* more refs

* Merge master (#555)

* Revisit Floodsub (#543)

Fixes #525

add coverage to unsubscribeAll and testing

* add mounted protos to identify message (#546)

* add stable/unstable auto bumps

* fix auto-bump CI

* merge nbc auto bump with CI in order to bump only on CI success

* put conditional locks on nbc bump (#549)

* Fix minor exception issues (#550)

Makes code compatible with
status-im/nim-chronos#166 without requiring it.

* fix nimbus ref for auto-bump stable's PR

* Split dialer (#542)

* extracting dialing logic to dialer

* exposing upgrade methods on transport

* cleanup

* fixing tests to use new interfaces

* add comments

* add base exception class and fix hierarchy

* fix imports

* `doAssert` is `ValueError` not `AssertionError`?

* revert back to `AssertionError`

Co-authored-by: Giovanni Petrantoni <7008900+sinkingsugar@users.noreply.github.com>
Co-authored-by: Jacek Sieka <jacek@status.im>

* `doAssert` is `ValueError` not `AssertionError`?

* revert back to `AssertionError`

* fix builders

* more builder stuff

* more builders

Co-authored-by: Giovanni Petrantoni <7008900+sinkingsugar@users.noreply.github.com>
Co-authored-by: Jacek Sieka <jacek@status.im>

libp2p.nim

@@ -26,7 +26,7 @@ import
           peerid,
           peerinfo,
           multiaddress,
-          standard_setup,
+          builders,
           crypto/crypto]
 
 import bearssl
@@ -36,4 +36,4 @@ export
   connection, multiaddress, crypto, lpstream,
   bufferstream, bearssl, muxer, mplex, transport,
   tcptransport, noise, errors, cid, multihash,
-  multicodec, standard_setup
+  multicodec, builders

libp2p/builders.nim

@@ -0,0 +1,198 @@
+import
+  options, tables, chronos, bearssl,
+  switch, peerid, peerinfo, stream/connection, multiaddress,
+  crypto/crypto, transports/[transport, tcptransport],
+  muxers/[muxer, mplex/mplex],
+  protocols/[identify, secure/secure, secure/noise],
+  connmanager, upgrademngrs/muxedupgrade
+
+export
+  switch, peerid, peerinfo, connection, multiaddress, crypto
+
+type
+  SecureProtocol* {.pure.} = enum
+    Noise,
+    Secio {.deprecated.}
+
+  TcpTransportOpts = object
+    enable: bool
+    flags: set[ServerFlags]
+
+  MplexOpts = object
+    enable: bool
+    newMuxer: MuxerConstructor
+
+  SwitchBuilder* = ref object
+    privKey: Option[PrivateKey]
+    address: MultiAddress
+    secureManagers: seq[SecureProtocol]
+    mplexOpts: MplexOpts
+    tcpTransportOpts: TcpTransportOpts
+    rng: ref BrHmacDrbgContext
+    inTimeout: Duration
+    outTimeout: Duration
+    maxConnections: int
+    maxIn: int
+    maxOut: int
+    maxConnsPerPeer: int
+    protoVersion: string
+    agentVersion: string
+
+proc init*(T: type[SwitchBuilder]): T =
+  SwitchBuilder(
+    privKey: none(PrivateKey),
+    address: MultiAddress.init("/ip4/127.0.0.1/tcp/0").tryGet(),
+    secureManagers: @[],
+    tcpTransportOpts: TcpTransportOpts(),
+    rng: newRng(),
+    maxConnections: MaxConnections,
+    maxIn: -1,
+    maxOut: -1,
+    maxConnsPerPeer: MaxConnectionsPerPeer,
+    protoVersion: ProtoVersion,
+    agentVersion: AgentVersion)
+
+proc withPrivateKey*(b: SwitchBuilder, privateKey: PrivateKey): SwitchBuilder =
+  b.privKey = some(privateKey)
+  b
+
+proc withAddress*(b: SwitchBuilder, address: MultiAddress): SwitchBuilder =
+  b.address = address
+  b
+
+proc withMplex*(b: SwitchBuilder, inTimeout = 5.minutes, outTimeout = 5.minutes): SwitchBuilder =
+  proc newMuxer(conn: Connection): Muxer =
+    Mplex.init(
+      conn,
+      inTimeout = inTimeout,
+      outTimeout = outTimeout)
+
+  b.mplexOpts = MplexOpts(
+    enable: true,
+    newMuxer: newMuxer,
+  )
+
+  b
+
+proc withNoise*(b: SwitchBuilder): SwitchBuilder =
+  b.secureManagers.add(SecureProtocol.Noise)
+  b
+
+proc withTcpTransport*(b: SwitchBuilder, flags: set[ServerFlags] = {}): SwitchBuilder =
+  b.tcpTransportOpts.enable = true
+  b.tcpTransportOpts.flags = flags
+  b
+
+proc withRng*(b: SwitchBuilder, rng: ref BrHmacDrbgContext): SwitchBuilder =
+  b.rng = rng
+  b
+
+proc withMaxConnections*(b: SwitchBuilder, maxConnections: int): SwitchBuilder =
+  b.maxConnections = maxConnections
+  b
+
+proc withMaxIn*(b: SwitchBuilder, maxIn: int): SwitchBuilder =
+  b.maxIn = maxIn
+  b
+
+proc withMaxOut*(b: SwitchBuilder, maxOut: int): SwitchBuilder =
+  b.maxOut = maxOut
+  b
+
+proc withMaxConnsPerPeer*(b: SwitchBuilder, maxConnsPerPeer: int): SwitchBuilder =
+  b.maxConnsPerPeer = maxConnsPerPeer
+  b
+
+proc withProtoVersion*(b: SwitchBuilder, protoVersion: string): SwitchBuilder =
+  b.protoVersion = protoVersion
+  b
+
+proc withAgentVersion*(b: SwitchBuilder, agentVersion: string): SwitchBuilder =
+  b.agentVersion = agentVersion
+  b
+
+proc build*(b: SwitchBuilder): Switch =
+  if b.rng == nil: # newRng could fail
+    raise (ref CatchableError)(msg: "Cannot initialize RNG")
+
+  let
+    seckey = b.privKey.get(otherwise = PrivateKey.random(b.rng[]).tryGet())
+
+  var
+    secureManagerInstances: seq[Secure]
+  if SecureProtocol.Noise in b.secureManagers:
+    secureManagerInstances.add(newNoise(b.rng, seckey).Secure)
+
+  let
+    peerInfo = block:
+      var info = PeerInfo.init(seckey, [b.address])
+      info.protoVersion = b.protoVersion
+      info.agentVersion = b.agentVersion
+      info
+
+  let
+    muxers = block:
+      var muxers: Table[string, MuxerProvider]
+      if b.mplexOpts.enable:
+        muxers.add(MplexCodec, newMuxerProvider(b.mplexOpts.newMuxer, MplexCodec))
+      muxers
+
+  let
+    identify = newIdentify(peerInfo)
+    connManager = ConnManager.init(b.maxConnsPerPeer, b.maxConnections, b.maxIn, b.maxOut)
+    ms = newMultistream()
+    muxedUpgrade = MuxedUpgrade.init(identify, muxers, secureManagerInstances, connManager, ms)
+
+  let
+    transports = block:
+      var transports: seq[Transport]
+      if b.tcpTransportOpts.enable:
+        transports.add(Transport(TcpTransport.init(b.tcpTransportOpts.flags, muxedUpgrade)))
+      transports
+
+  if b.secureManagers.len == 0:
+    b.secureManagers &= SecureProtocol.Noise
+
+  let switch = newSwitch(
+    peerInfo = peerInfo,
+    transports = transports,
+    identity = identify,
+    muxers = muxers,
+    secureManagers = secureManagerInstances,
+    connManager = connManager,
+    ms = ms)
+
+  return switch
+
+proc newStandardSwitch*(privKey = none(PrivateKey),
+                        address = MultiAddress.init("/ip4/127.0.0.1/tcp/0").tryGet(),
+                        secureManagers: openarray[SecureProtocol] = [
+                            SecureProtocol.Noise,
+                          ],
+                        transportFlags: set[ServerFlags] = {},
+                        rng = newRng(),
+                        inTimeout: Duration = 5.minutes,
+                        outTimeout: Duration = 5.minutes,
+                        maxConnections = MaxConnections,
+                        maxIn = -1,
+                        maxOut = -1,
+                        maxConnsPerPeer = MaxConnectionsPerPeer): Switch =
+  if SecureProtocol.Secio in secureManagers:
+      quit("Secio is deprecated!") # use of secio is unsafe
+
+  var b = SwitchBuilder
+    .init()
+    .withAddress(address)
+    .withRng(rng)
+    .withMaxConnections(maxConnections)
+    .withMaxIn(maxIn)
+    .withMaxOut(maxOut)
+    .withMaxConnsPerPeer(maxConnsPerPeer)
+    .withMplex(inTimeout, outTimeout)
+    .withTcpTransport(transportFlags)
+    .withNoise()
+
+  if privKey.isSome():
+    b = b.withPrivateKey(privKey.get())
+
+  b.build()

libp2p/protocols/secure/noise.nim

@@ -578,8 +578,10 @@ method init*(p: Noise) {.gcsafe.} =
   p.codec = NoiseCodec
 
 proc newNoise*(
-    rng: ref BrHmacDrbgContext, privateKey: PrivateKey;
-    outgoing: bool = true; commonPrologue: seq[byte] = @[]): Noise =
+    rng: ref BrHmacDrbgContext,
+    privateKey: PrivateKey;
+    outgoing: bool = true;
+    commonPrologue: seq[byte] = @[]): Noise =
   result = Noise(
     rng: rng,
     outgoing: outgoing,

tests/pubsub/testgossipinternal.nim

@@ -5,7 +5,7 @@ include ../../libp2p/protocols/pubsub/gossipsub
 import options
 import unittest, bearssl
 import stew/byteutils
-import ../../libp2p/standard_setup
+import ../../libp2p/builders
 import ../../libp2p/errors
 import ../../libp2p/crypto/crypto
 import ../../libp2p/stream/bufferstream

tests/pubsub/utils.nim

@@ -6,13 +6,13 @@ const
 
 import random, tables
 import chronos
-import ../../libp2p/[standard_setup,
+import ../../libp2p/[builders,
                      protocols/pubsub/pubsub,
                      protocols/pubsub/gossipsub,
                      protocols/pubsub/floodsub,
                      protocols/secure/secure]
 
-export standard_setup
+export builders
 
 randomize()
 

tests/testinterop.nim

@@ -10,7 +10,7 @@ import ../libp2p/[daemon/daemonapi,
                   cid,
                   varint,
                   multihash,
-                  standard_setup,
+                  builders,
                   peerid,
                   peerinfo,
                   switch,

tests/testswitch.nim

@@ -7,7 +7,7 @@ import nimcrypto/sysrand
 import ../libp2p/[errors,
                   switch,
                   multistream,
-                  standard_setup,
+                  builders,
                   stream/bufferstream,
                   stream/connection,
                   multiaddress,