mirror of https://github.com/waku-org/nwaku.git
143 lines
4.0 KiB
Nim
143 lines
4.0 KiB
Nim
import
|
|
std/tables,
|
|
bearssl,
|
|
chronos, chronicles, metrics, stew/results,
|
|
libp2p/switch,
|
|
libp2p/crypto/crypto,
|
|
libp2p/protocols/protocol,
|
|
libp2p/protobuf/minprotobuf,
|
|
libp2p/stream/connection,
|
|
./message_notifier,
|
|
./../../node/v2/waku_types
|
|
|
|
logScope:
|
|
topics = "wakustore"
|
|
|
|
const
|
|
WakuStoreCodec* = "/vac/waku/store/2.0.0-beta1"
|
|
|
|
proc init*(T: type HistoryQuery, buffer: seq[byte]): ProtoResult[T] =
|
|
var msg = HistoryQuery()
|
|
let pb = initProtoBuffer(buffer)
|
|
|
|
var topics: seq[string]
|
|
|
|
discard ? pb.getRepeatedField(1, topics)
|
|
|
|
msg.topics = topics
|
|
ok(msg)
|
|
|
|
proc init*(T: type HistoryResponse, buffer: seq[byte]): ProtoResult[T] =
|
|
var msg = HistoryResponse()
|
|
let pb = initProtoBuffer(buffer)
|
|
|
|
var messages: seq[seq[byte]]
|
|
discard ? pb.getRepeatedField(1, messages)
|
|
|
|
for buf in messages:
|
|
msg.messages.add(? WakuMessage.init(buf))
|
|
|
|
ok(msg)
|
|
|
|
proc init*(T: type HistoryRPC, buffer: seq[byte]): ProtoResult[T] =
|
|
var rpc = HistoryRPC()
|
|
let pb = initProtoBuffer(buffer)
|
|
|
|
discard ? pb.getField(1, rpc.requestId)
|
|
|
|
var queryBuffer: seq[byte]
|
|
discard ? pb.getField(2, queryBuffer)
|
|
|
|
rpc.query = ? HistoryQuery.init(queryBuffer)
|
|
|
|
var responseBuffer: seq[byte]
|
|
discard ? pb.getField(3, responseBuffer)
|
|
|
|
rpc.response = ? HistoryResponse.init(responseBuffer)
|
|
|
|
ok(rpc)
|
|
|
|
proc encode*(query: HistoryQuery): ProtoBuffer =
|
|
result = initProtoBuffer()
|
|
|
|
for topic in query.topics:
|
|
result.write(1, topic)
|
|
|
|
proc encode*(response: HistoryResponse): ProtoBuffer =
|
|
result = initProtoBuffer()
|
|
|
|
for msg in response.messages:
|
|
result.write(1, msg.encode())
|
|
|
|
proc encode*(rpc: HistoryRPC): ProtoBuffer =
|
|
result = initProtoBuffer()
|
|
|
|
result.write(1, rpc.requestId)
|
|
result.write(2, rpc.query.encode())
|
|
result.write(3, rpc.response.encode())
|
|
|
|
proc findMessages(w: WakuStore, query: HistoryQuery): HistoryResponse =
|
|
result = HistoryResponse(messages: newSeq[WakuMessage]())
|
|
for msg in w.messages:
|
|
if msg.contentTopic in query.topics:
|
|
result.messages.insert(msg)
|
|
|
|
method init*(ws: WakuStore) =
|
|
proc handle(conn: Connection, proto: string) {.async, gcsafe, closure.} =
|
|
var message = await conn.readLp(64*1024)
|
|
var res = HistoryRPC.init(message)
|
|
if res.isErr:
|
|
error "failed to decode rpc"
|
|
return
|
|
|
|
info "received query"
|
|
|
|
let value = res.value
|
|
let response = ws.findMessages(res.value.query)
|
|
await conn.writeLp(HistoryRPC(requestId: value.requestId, response: response).encode().buffer)
|
|
|
|
ws.handler = handle
|
|
ws.codec = WakuStoreCodec
|
|
|
|
proc init*(T: type WakuStore, switch: Switch, rng: ref BrHmacDrbgContext): T =
|
|
new result
|
|
result.rng = rng
|
|
result.switch = switch
|
|
result.init()
|
|
|
|
# @TODO THIS SHOULD PROBABLY BE AN ADD FUNCTION AND APPEND THE PEER TO AN ARRAY
|
|
proc setPeer*(ws: WakuStore, peer: PeerInfo) =
|
|
ws.peers.add(HistoryPeer(peerInfo: peer))
|
|
|
|
proc subscription*(proto: WakuStore): MessageNotificationSubscription =
|
|
## The filter function returns the pubsub filter for the node.
|
|
## This is used to pipe messages into the storage, therefore
|
|
## the filter should be used by the component that receives
|
|
## new messages.
|
|
proc handle(topic: string, msg: WakuMessage) {.async.} =
|
|
proto.messages.add(msg)
|
|
|
|
MessageNotificationSubscription.init(@[], handle)
|
|
|
|
proc query*(w: WakuStore, query: HistoryQuery, handler: QueryHandlerFunc) {.async, gcsafe.} =
|
|
# @TODO We need to be more stratigic about which peers we dial. Right now we just set one on the service.
|
|
# Ideally depending on the query and our set of peers we take a subset of ideal peers.
|
|
# This will require us to check for various factors such as:
|
|
# - which topics they track
|
|
# - latency?
|
|
# - default store peer?
|
|
|
|
let peer = w.peers[0]
|
|
let conn = await w.switch.dial(peer.peerInfo.peerId, peer.peerInfo.addrs, WakuStoreCodec)
|
|
|
|
await conn.writeLP(HistoryRPC(requestId: generateRequestId(w.rng), query: query).encode().buffer)
|
|
|
|
var message = await conn.readLp(64*1024)
|
|
let response = HistoryRPC.init(message)
|
|
|
|
if response.isErr:
|
|
error "failed to decode response"
|
|
return
|
|
|
|
handler(response.value.response)
|