nwaku/waku/node/builder.nim

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when (NimMajor, NimMinor) < (1, 4):
{.push raises: [Defect].}
else:
{.push raises: [].}
import
std/options,
stew/results,
stew/shims/net,
chronicles,
libp2p/crypto/crypto,
libp2p/builders,
libp2p/nameresolving/nameresolver,
libp2p/transports/wstransport
import
../waku_enr,
../waku_discv5,
./config,
./peer_manager,
./waku_node,
./waku_switch
type
WakuNodeBuilder* = object
# General
nodeRng: Option[ref crypto.HmacDrbgContext]
nodeKey: Option[crypto.PrivateKey]
netConfig: Option[NetConfig]
record: Option[enr.Record]
# Peer storage and peer manager
peerStorage: Option[PeerStorage]
peerStorageCapacity: Option[int]
# Peer manager config
maxRelayPeers: Option[int]
# Libp2p switch
switchMaxConnections: Option[int]
switchNameResolver: Option[NameResolver]
switchAgentString: Option[string]
switchSslSecureKey: Option[string]
switchSslSecureCert: Option[string]
switchSendSignedPeerRecord: Option[bool]
WakuNodeBuilderResult* = Result[void, string]
## Init
proc init*(T: type WakuNodeBuilder): WakuNodeBuilder =
WakuNodeBuilder()
## General
proc withRng*(builder: var WakuNodeBuilder, rng: ref crypto.HmacDrbgContext) =
builder.nodeRng = some(rng)
proc withNodeKey*(builder: var WakuNodeBuilder, nodeKey: crypto.PrivateKey) =
builder.nodeKey = some(nodeKey)
proc withRecord*(builder: var WakuNodeBuilder, record: enr.Record) =
builder.record = some(record)
proc withNetworkConfiguration*(builder: var WakuNodeBuilder, config: NetConfig) =
builder.netConfig = some(config)
proc withNetworkConfigurationDetails*(builder: var WakuNodeBuilder,
bindIp: ValidIpAddress,
bindPort: Port,
extIp = none(ValidIpAddress),
extPort = none(Port),
extMultiAddrs = newSeq[MultiAddress](),
wsBindPort: Port = Port(8000),
wsEnabled: bool = false,
wssEnabled: bool = false,
wakuFlags = none(CapabilitiesBitfield),
dns4DomainName = none(string)): WakuNodeBuilderResult {.
deprecated: "use 'builder.withNetworkConfiguration()' instead".} =
let netConfig = ? NetConfig.init(
bindIp = bindIp,
bindPort = bindPort,
extIp = extIp,
extPort = extPort,
extMultiAddrs = extMultiAddrs,
wsBindPort = wsBindPort,
wsEnabled = wsEnabled,
wssEnabled = wssEnabled,
wakuFlags = wakuFlags,
dns4DomainName = dns4DomainName,
)
builder.withNetworkConfiguration(netConfig)
ok()
## Peer storage and peer manager
proc withPeerStorage*(builder: var WakuNodeBuilder, peerStorage: PeerStorage, capacity = none(int)) =
if not peerStorage.isNil():
builder.peerStorage = some(peerStorage)
builder.peerStorageCapacity = capacity
proc withPeerManagerConfig*(builder: var WakuNodeBuilder,
maxRelayPeers = none(int)) =
builder.maxRelayPeers = maxRelayPeers
## Waku switch
proc withSwitchConfiguration*(builder: var WakuNodeBuilder,
maxConnections = none(int),
nameResolver: NameResolver = nil,
sendSignedPeerRecord = false,
secureKey = none(string),
secureCert = none(string),
agentString = none(string)) =
builder.switchMaxConnections = maxConnections
builder.switchSendSignedPeerRecord = some(sendSignedPeerRecord)
builder.switchSslSecureKey = secureKey
builder.switchSslSecureCert = secureCert
builder.switchAgentString = agentString
if not nameResolver.isNil():
builder.switchNameResolver = some(nameResolver)
## Build
proc build*(builder: WakuNodeBuilder): Result[WakuNode, string] =
var rng: ref crypto.HmacDrbgContext
if builder.nodeRng.isNone():
rng = crypto.newRng()
else:
rng = builder.nodeRng.get()
if builder.nodeKey.isNone():
return err("node key is required")
if builder.netConfig.isNone():
return err("network configuration is required")
if builder.record.isNone():
return err("node record is required")
var switch: Switch
try:
switch = newWakuSwitch(
privKey = builder.nodekey,
address = builder.netConfig.get().hostAddress,
wsAddress = builder.netConfig.get().wsHostAddress,
transportFlags = {ServerFlags.ReuseAddr, ServerFlags.TcpNoDelay},
rng = rng,
maxConnections = builder.switchMaxConnections.get(builders.MaxConnections),
wssEnabled = builder.netConfig.get().wssEnabled,
secureKeyPath = builder.switchSslSecureKey.get(""),
secureCertPath = builder.switchSslSecureCert.get(""),
nameResolver = builder.switchNameResolver.get(nil),
sendSignedPeerRecord = builder.switchSendSignedPeerRecord.get(false),
agentString = builder.switchAgentString,
peerStoreCapacity = builder.peerStorageCapacity,
services = @[Service(getAutonatService(rng))],
)
except CatchableError:
return err("failed to create switch: " & getCurrentExceptionMsg())
let peerManager = PeerManager.new(
switch = switch,
storage = builder.peerStorage.get(nil),
maxRelayPeers = builder.maxRelayPeers,
)
var node: WakuNode
try:
node = WakuNode.new(
netConfig = builder.netConfig.get(),
enr = builder.record.get(),
switch = switch,
peerManager = peerManager,
rng = rng,
)
except Exception:
return err("failed to build WakuNode instance: " & getCurrentExceptionMsg())
ok(node)