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waku2-filter (#23) 

* waku2-filter
This commit is contained in:
Vitaliy Vlasov 2021-06-10 15:59:51 +03:00 committed by GitHub
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examples/filter2/Makefile Normal file
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.PHONY: all build
build:
go build -o build/filter2 .
all: build

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examples/filter2/README.md Normal file
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# Using the `filter2` application
## Background
The `filter2` application is a basic example app that demonstrates how to subscribe to and publish messages using waku2-filter
## Preparation
```
make
```
## Basic application usage
To start the `filter2` application run the following from the project directory
```
./build/filter2
```
The app will run 2 nodes ("full" node and "light" node), with light node subscribing to full node in order to receive filtered messages.
## Flow description
1. Light node submits a FilterRequest through WakuNode.SubscribeFilter. This request is submitted to a particular peer.
Filter is stored in WakuNode.filters map. That's it.
DONE
2. Full node: we read incoming messages in WakuFilter.onRequest(). It is set as a stream handler on wakunode.Host for WakuFilterProtocolId.
3. In WakuFilter.onRequest():
3.1. We check whether it's a MessagePush or FilterRequest.
3.2. If it's a MessagePush, then we're on a light node. Invoke pushHandler coming from WakuNode.mountFilter()
3.3. If it's a FilterRequest, add a subscriber.
4. WakuNode.Subscribe has a message loop extracting WakuMessages from a wakurelay.Subscription object.
It denotes a pubsub topic subscription.
All envelopes are then submitted to node.broadcaster.
## Nim code flow
1. Light node: WakuFilter.subscribe(). Find a peer, wrileLP(FilterRequest). Store requestId in WakuNode.filters along with a ContentFilterHandler proc.
2. Full node: WakuFilter inherits LPProtocol. LPProtocol.handler invokes readLP() to read FilterRPC messages
3. this handler function has a signature (conn: Connection, proto: string).
3.1. it checks whether a MessagePush or FilterRequest is received.
3.2. (light node) if it's a MessagePush, then we're on a light node. Invoke pushHandler of MessagePushHandler type. This pushHandler comes from WakuNode.mountFilter(). It iterates through all registered WakuNode.filters (stored in step 1) and invokes their ContentFilterHandler proc.
3.3. (full node) if it's a FilterRequest, create a Subscriber and add to WakuFilter.subscribers seq
4. (full node) Each time a message is received through GossipSub in wakunode.subscribe.defaultHandler(), we iterate through subscriptions.
5. (full node) One of these subscriptions is a filter subscription added by WakuNode.mountFilter(), which in turn is returned from WakuFilter.subscription()
6. (full node) This subscription iterates through subscribers added by WakuFilter.handler() fn (subscribers being light nodes)
7. (full node) Once subscriber peer is found, a message is pushed directly to the peer (go to step 3.2)

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examples/filter2/go.mod Normal file
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module filter2
go 1.15
require (
github.com/ethereum/go-ethereum v1.9.5
github.com/ipfs/go-log v1.0.5
github.com/multiformats/go-multiaddr v0.3.1 // indirect
github.com/status-im/go-waku v0.0.0-20210525134543-f6ebb5b0f9ae
)
replace github.com/status-im/go-waku => ../..

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examples/filter2/go.sum Normal file
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github.com/status-im/go-wakurelay-pubsub v0.4.2/go.mod h1:LSCVYR7mnBBsxVJghrGpQ3yJAAATEe6XeQQqGCZhwrE=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s=
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github.com/whyrusleeping/timecache v0.0.0-20160911033111-cfcb2f1abfee/go.mod h1:m2aV4LZI4Aez7dP5PMyVKEHhUyEJ/RjmPEDOpDvudHg=
github.com/x-cray/logrus-prefixed-formatter v0.5.2/go.mod h1:2duySbKsL6M18s5GU7VPsoEPHyzalCE06qoARUCeBBE=
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github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
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go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
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golang.org/x/crypto v0.0.0-20170930174604-9419663f5a44/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190225124518-7f87c0fbb88b/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190618222545-ea8f1a30c443/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20200423211502-4bdfaf469ed5/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136/go.mod h1:JXzH8nQsPlswgeRAPE3MuO9GYsAcnJvJ4vnMwN/5qkY=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181011144130-49bb7cea24b1/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190227160552-c95aed5357e7/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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gopkg.in/src-d/go-log.v1 v1.0.1/go.mod h1:GN34hKP0g305ysm2/hctJ0Y8nWP3zxXXJ8GFabTyABE=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=

161
examples/filter2/main.go Normal file
View File

@ -0,0 +1,161 @@
package main
import (
"context"
"crypto/rand"
"encoding/hex"
"fmt"
"net"
"os"
"os/signal"
"syscall"
"time"
"github.com/ethereum/go-ethereum/crypto"
logging "github.com/ipfs/go-log"
"github.com/status-im/go-waku/waku/v2/node"
"github.com/status-im/go-waku/waku/v2/protocol/filter"
"github.com/status-im/go-waku/waku/v2/protocol/pb"
"github.com/status-im/go-waku/waku/v2/protocol/relay"
)
var log = logging.Logger("filter2")
var pubSubTopic = relay.DefaultWakuTopic
const contentTopic = "test"
func main() {
lvl, err := logging.LevelFromString("info")
if err != nil {
panic(err)
}
logging.SetAllLoggers(lvl)
hostAddr1, _ := net.ResolveTCPAddr("tcp", fmt.Sprint("0.0.0.0:60000"))
hostAddr2, _ := net.ResolveTCPAddr("tcp", fmt.Sprint("0.0.0.0:60002"))
key1, err := randomHex(32)
if err != nil {
log.Error("Could not generate random key")
return
}
prvKey1, err := crypto.HexToECDSA(key1)
key2, err := randomHex(32)
if err != nil {
log.Error("Could not generate random key")
return
}
prvKey2, err := crypto.HexToECDSA(key2)
ctx := context.Background()
fullNode, err := node.New(ctx,
node.WithPrivateKey(prvKey1),
node.WithHostAddress([]net.Addr{hostAddr1}),
node.WithWakuRelay(),
node.WithWakuFilter(),
)
lightNode, err := node.New(ctx,
node.WithPrivateKey(prvKey2),
node.WithHostAddress([]net.Addr{hostAddr2}),
node.WithWakuRelay(),
node.WithWakuFilter(),
)
_, err = lightNode.AddFilterPeer(fullNode.ListenAddresses()[0])
if err != nil {
log.Info("Error adding filter peer on light node ", err)
}
//
// Setup filter
//
// Send FilterRequest from light node to full node
filterRequest := pb.FilterRequest{
ContentFilters: []*pb.FilterRequest_ContentFilter{&pb.FilterRequest_ContentFilter{ContentTopic: contentTopic}},
Topic: string(pubSubTopic),
Subscribe: true,
}
filterChan := make(filter.ContentFilterChan)
go func() {
for msg := range filterChan {
log.Info("Light node received msg, ", string(msg.Payload))
}
}()
lightNode.SubscribeFilter(ctx, filterRequest, filterChan)
go writeLoop(ctx, fullNode)
go readLoop(fullNode)
// Wait for a SIGINT or SIGTERM signal
ch := make(chan os.Signal, 1)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
<-ch
fmt.Println("\n\n\nReceived signal, shutting down...")
// shut the nodes down
fullNode.Stop()
lightNode.Stop()
}
func randomHex(n int) (string, error) {
bytes := make([]byte, n)
if _, err := rand.Read(bytes); err != nil {
return "", err
}
return hex.EncodeToString(bytes), nil
}
func write(ctx context.Context, wakuNode *node.WakuNode, msgContent string) {
var version uint32 = 0
var timestamp float64 = float64(time.Now().UnixNano())
p := new(node.Payload)
p.Data = []byte(wakuNode.ID() + ": " + msgContent)
p.Key = &node.KeyInfo{Kind: node.None}
payload, err := p.Encode(version)
msg := &pb.WakuMessage{
Payload: payload,
Version: version,
ContentTopic: contentTopic,
Timestamp: timestamp,
}
_, err = wakuNode.Publish(ctx, msg, nil)
if err != nil {
log.Error("Error sending a message: ", err)
}
}
func writeLoop(ctx context.Context, wakuNode *node.WakuNode) {
for {
time.Sleep(2 * time.Second)
write(ctx, wakuNode, "Hello world!")
}
}
func readLoop(wakuNode *node.WakuNode) {
sub, err := wakuNode.Subscribe(&pubSubTopic)
if err != nil {
log.Error("Could not subscribe: ", err)
return
}
for value := range sub.C {
payload, err := node.DecodePayload(value.Message(), &node.KeyInfo{Kind: node.None})
if err != nil {
fmt.Println(err)
return
}
log.Info("Received msg, ", string(payload.Data))
}
}

6
waku/node.go
View File

@ -57,6 +57,7 @@ var rootCmd = &cobra.Command{
enableWs, _ := cmd.Flags().GetBool("ws")
wsPort, _ := cmd.Flags().GetInt("ws-port")
wakuRelay, _ := cmd.Flags().GetBool("relay")
wakuFilter, _ := cmd.Flags().GetBool("filter")
key, _ := cmd.Flags().GetString("nodekey")
store, _ := cmd.Flags().GetBool("store")
useDB, _ := cmd.Flags().GetBool("use-db")
@ -120,6 +121,10 @@ var rootCmd = &cobra.Command{
nodeOpts = append(nodeOpts, node.WithWakuRelay())
}
if wakuFilter {
nodeOpts = append(nodeOpts, node.WithWakuFilter())
}
if store {
nodeOpts = append(nodeOpts, node.WithWakuStore(true))
if useDB {
@ -189,6 +194,7 @@ func init() {
rootCmd.Flags().StringSlice("topics", []string{string(relay.DefaultWakuTopic)}, fmt.Sprintf("List of topics to listen (default %s)", relay.DefaultWakuTopic))
rootCmd.Flags().StringSlice("staticnodes", []string{}, "Multiaddr of peer to directly connect with. Argument may be repeated")
rootCmd.Flags().Bool("relay", true, "Enable relay protocol")
rootCmd.Flags().Bool("filter", true, "Enable filter protocol")
rootCmd.Flags().Bool("store", false, "Enable store protocol")
rootCmd.Flags().Bool("use-db", true, "Store messages and peers in a DB, (default: true, use false for in-memory only)")
rootCmd.Flags().String("dbpath", "./store.db", "Path to DB file")

85
waku/v2/node/wakunode2.go
View File

@ -15,6 +15,7 @@ import (
ma "github.com/multiformats/go-multiaddr"
"github.com/status-im/go-waku/waku/v2/protocol"
"github.com/status-im/go-waku/waku/v2/protocol/filter"
"github.com/status-im/go-waku/waku/v2/protocol/lightpush"
"github.com/status-im/go-waku/waku/v2/protocol/pb"
"github.com/status-im/go-waku/waku/v2/protocol/relay"
@ -34,6 +35,7 @@ type WakuNode struct {
opts *WakuNodeParameters
relay *relay.WakuRelay
filter *filter.WakuFilter
lightPush *lightpush.WakuLightPush
subscriptions map[relay.Topic][]*Subscription
@ -41,6 +43,8 @@ type WakuNode struct {
bcaster Broadcaster
filters filter.Filters
ctx context.Context
cancel context.CancelFunc
}
@ -88,6 +92,14 @@ func New(ctx context.Context, opts ...WakuNodeOption) (*WakuNode, error) {
}
}
if params.enableFilter {
w.filters = make(filter.Filters)
err := w.mountFilter()
if err != nil {
return nil, err
}
}
if params.enableStore {
err := w.startStore()
if err != nil {
@ -141,16 +153,30 @@ func (w *WakuNode) Relay() *relay.WakuRelay {
return w.relay
}
func (w *WakuNode) Filter() *filter.WakuFilter {
return w.filter
}
func (w *WakuNode) mountRelay(opts ...wakurelay.Option) error {
var err error
w.relay, err = relay.NewWakuRelay(w.ctx, w.host, opts...)
// TODO: filters
// TODO: rlnRelay
return err
}
func (w *WakuNode) mountFilter() error {
filterHandler := func(requestId string, msg pb.MessagePush) {
for _, message := range msg.Messages {
w.filters.Notify(message, requestId) // Trigger filter handlers on a light node
}
}
w.filter = filter.NewWakuFilter(w.ctx, w.host, filterHandler)
return nil
}
func (w *WakuNode) mountLightPush() {
w.lightPush = lightpush.NewWakuLightPush(w.ctx, w.host, w.relay)
}
@ -184,6 +210,26 @@ func (w *WakuNode) AddStorePeer(address string) (*peer.ID, error) {
return &info.ID, w.opts.store.AddPeer(info.ID, info.Addrs)
}
// TODO Remove code duplication
func (w *WakuNode) AddFilterPeer(address string) (*peer.ID, error) {
if w.filter == nil {
return nil, errors.New("WakuFilter is not set")
}
filterPeer, err := ma.NewMultiaddr(address)
if err != nil {
return nil, err
}
// Extract the peer ID from the multiaddr.
info, err := peer.AddrInfoFromP2pAddr(filterPeer)
if err != nil {
return nil, err
}
return &info.ID, w.filter.AddPeer(info.ID, info.Addrs)
}
func (w *WakuNode) Query(ctx context.Context, contentTopics []string, startTime float64, endTime float64, opts ...store.HistoryRequestOption) (*pb.HistoryResponse, error) {
if w.opts.store == nil {
return nil, errors.New("WakuStore is not set")
@ -221,6 +267,12 @@ func (node *WakuNode) Subscribe(topic *relay.Topic) (*Subscription, error) {
node.bcaster.Register(node.opts.store.MsgC)
}
// Subscribe filter
if isNew && node.filter != nil {
log.Info("Subscribing filter to topic ", t)
node.bcaster.Register(node.filter.MsgC)
}
if err != nil {
return nil, err
}
@ -276,6 +328,37 @@ func (node *WakuNode) Subscribe(topic *relay.Topic) (*Subscription, error) {
return subscription, nil
}
// Wrapper around WakuFilter.Subscribe
// that adds a Filter object to node.filters
func (node *WakuNode) SubscribeFilter(ctx context.Context, request pb.FilterRequest, ch filter.ContentFilterChan) {
// Registers for messages that match a specific filter. Triggers the handler whenever a message is received.
// ContentFilterChan takes MessagePush structs
// Status: Implemented.
// Sanity check for well-formed subscribe FilterRequest
//doAssert(request.subscribe, "invalid subscribe request")
log.Info("subscribe content", request)
var id string
if node.filter != nil {
id, err := node.filter.Subscribe(ctx, request)
// TODO
if id == "" || err != nil {
// Failed to subscribe
log.Error("remote subscription to filter failed", request)
//waku_node_errors.inc(labelValues = ["subscribe_filter_failure"])
id = string(protocol.GenerateRequestId())
}
}
// Register handler for filter, whether remote subscription succeeded or not
node.filters[string(id)] = filter.Filter{ContentFilters: request.ContentFilters, Chan: ch}
}
func (node *WakuNode) Publish(ctx context.Context, message *pb.WakuMessage, topic *relay.Topic) ([]byte, error) {
if node.relay == nil {
return nil, errors.New("WakuRelay hasn't been set.")

17
waku/v2/node/wakuoptions.go
View File

@ -9,6 +9,7 @@ import (
"github.com/libp2p/go-libp2p-core/crypto"
ma "github.com/multiformats/go-multiaddr"
manet "github.com/multiformats/go-multiaddr-net"
"github.com/status-im/go-waku/waku/v2/protocol/filter"
"github.com/status-im/go-waku/waku/v2/protocol/store"
wakurelay "github.com/status-im/go-wakurelay-pubsub"
)
@ -18,12 +19,14 @@ type WakuNodeParameters struct {
privKey *crypto.PrivKey
libP2POpts []libp2p.Option
enableRelay bool
wOpts []wakurelay.Option
enableRelay bool
enableFilter bool
wOpts []wakurelay.Option
enableStore bool
storeMsgs bool
store *store.WakuStore
filter *filter.WakuFilter
enableLightPush bool
}
@ -85,6 +88,16 @@ func WithWakuRelay(opts ...wakurelay.Option) WakuNodeOption {
}
}
// WithWakuFilter enables the Waku V2 Filter protocol. This WakuNodeOption
// accepts a list of WakuFilter gossipsub options to setup the protocol
func WithWakuFilter(opts ...wakurelay.Option) WakuNodeOption {
return func(params *WakuNodeParameters) error {
params.enableFilter = true
params.wOpts = opts
return nil
}
}
// WithWakuStore enables the Waku V2 Store protocol and if the messages should
// be stored or not in a message provider
func WithWakuStore(shouldStoreMessages bool) WakuNodeOption {

278
waku/v2/protocol/filter/waku_filter.go Normal file
View File

@ -0,0 +1,278 @@
package filter
import (
"context"
"encoding/hex"
"fmt"
logging "github.com/ipfs/go-log"
"github.com/libp2p/go-libp2p-core/host"
"github.com/libp2p/go-libp2p-core/network"
"github.com/libp2p/go-libp2p-core/peer"
libp2pProtocol "github.com/libp2p/go-libp2p-core/protocol"
peerstore "github.com/libp2p/go-libp2p-peerstore"
"github.com/libp2p/go-msgio/protoio"
ma "github.com/multiformats/go-multiaddr"
"github.com/status-im/go-waku/waku/v2/protocol"
"github.com/status-im/go-waku/waku/v2/protocol/pb"
)
var log = logging.Logger("wakufilter")
type (
ContentFilterChan chan *pb.WakuMessage
Filter struct {
ContentFilters []*pb.FilterRequest_ContentFilter
Chan ContentFilterChan
}
// @TODO MAYBE MORE INFO?
Filters map[string]Filter
Subscriber struct {
peer string
requestId string
filter pb.FilterRequest // @TODO MAKE THIS A SEQUENCE AGAIN?
}
MessagePushHandler func(requestId string, msg pb.MessagePush)
WakuFilter struct {
ctx context.Context
h host.Host
subscribers []Subscriber
pushHandler MessagePushHandler
MsgC chan *protocol.Envelope
}
)
// NOTE This is just a start, the design of this protocol isn't done yet. It
// should be direct payload exchange (a la req-resp), not be coupled with the
// relay protocol.
const WakuFilterCodec = "/vac/waku/filter/2.0.0-beta1"
const WakuFilterProtocolId = libp2pProtocol.ID(WakuFilterCodec)
// Error types (metric label values)
const (
dialFailure = "dial_failure"
decodeRpcFailure = "decode_rpc_failure"
)
func (filters *Filters) Notify(msg *pb.WakuMessage, requestId string) {
for key, filter := range *filters {
// We do this because the key for the filter is set to the requestId received from the filter protocol.
// This means we do not need to check the content filter explicitly as all MessagePushs already contain
// the requestId of the coresponding filter.
if requestId != "" && requestId == key {
filter.Chan <- msg
continue
}
// TODO: In case of no topics we should either trigger here for all messages,
// or we should not allow such filter to exist in the first place.
for _, contentFilter := range filter.ContentFilters {
if msg.ContentTopic == contentFilter.ContentTopic {
filter.Chan <- msg
break
}
}
}
}
func (wf *WakuFilter) selectPeer() *peer.ID {
// @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?
// Selects the best peer for a given protocol
var peers peer.IDSlice
for _, peer := range wf.h.Peerstore().Peers() {
protocols, err := wf.h.Peerstore().SupportsProtocols(peer, string(WakuFilterProtocolId))
if err != nil {
log.Error("error obtaining the protocols supported by peers", err)
return nil
}
if len(protocols) > 0 {
peers = append(peers, peer)
}
}
if len(peers) >= 1 {
// TODO: proper heuristic here that compares peer scores and selects "best" one. For now the first peer for the given protocol is returned
return &peers[0]
}
return nil
}
func (wf *WakuFilter) onRequest(s network.Stream) {
defer s.Close()
filterRPCRequest := &pb.FilterRPC{}
reader := protoio.NewDelimitedReader(s, 64*1024)
err := reader.ReadMsg(filterRPCRequest)
if err != nil {
log.Error("error reading request", err)
return
}
log.Info(fmt.Sprintf("%s: Received query from %s", s.Conn().LocalPeer(), s.Conn().RemotePeer()))
if filterRPCRequest.Request != nil {
// We're on a full node.
// This is a filter request coming from a light node.
if filterRPCRequest.Request.Subscribe {
subscriber := Subscriber{peer: string(s.Conn().RemotePeer()), requestId: filterRPCRequest.RequestId, filter: *filterRPCRequest.Request}
wf.subscribers = append(wf.subscribers, subscriber)
log.Info("Full node, add a filter subscriber ", subscriber)
} else {
// TODO wf.subscribers.unsubscribeFilters(filterRPCRequest.Request, conn.peerInfo.peerId)
}
} else if filterRPCRequest.Push != nil {
// We're on a light node.
// This is a message push coming from a full node.
log.Info("Light node, received a message push ", *filterRPCRequest.Push)
wf.pushHandler(filterRPCRequest.RequestId, *filterRPCRequest.Push)
}
}
func NewWakuFilter(ctx context.Context, host host.Host, handler MessagePushHandler) *WakuFilter {
wf := new(WakuFilter)
wf.ctx = ctx
wf.MsgC = make(chan *protocol.Envelope)
wf.h = host
wf.pushHandler = handler
wf.h.SetStreamHandler(WakuFilterProtocolId, wf.onRequest)
go wf.FilterListener()
return wf
}
func (wf *WakuFilter) FilterListener() {
// This function is invoked for each message received
// on the full node in context of Waku2-Filter
handle := func(envelope *protocol.Envelope) error { // async
// trace "handle WakuFilter subscription", topic=topic, msg=msg
msg := envelope.Message()
topic := envelope.PubsubTopic()
// Each subscriber is a light node that earlier on invoked
// a FilterRequest on this node
for _, subscriber := range wf.subscribers {
if subscriber.filter.Topic != "" && subscriber.filter.Topic != topic {
log.Info("Subscriber's filter pubsubTopic does not match message topic", subscriber.filter.Topic, topic)
continue
}
for _, filter := range subscriber.filter.ContentFilters {
if msg.ContentTopic == filter.ContentTopic {
log.Info("Found matching contentTopic ", filter, msg)
msgArr := []*pb.WakuMessage{msg}
// Do a message push to light node
pushRPC := &pb.FilterRPC{RequestId: subscriber.requestId, Push: &pb.MessagePush{Messages: msgArr}}
log.Info("Pushing a message to light node: ", pushRPC)
conn, err := wf.h.NewStream(wf.ctx, peer.ID(subscriber.peer), WakuFilterProtocolId)
if err != nil {
// @TODO more sophisticated error handling here
log.Error("Failed to open peer stream")
//waku_filter_errors.inc(labelValues = [dialFailure])
return err
}
writer := protoio.NewDelimitedWriter(conn)
err = writer.WriteMsg(pushRPC)
if err != nil {
log.Error("failed to push messages to remote peer")
return nil
}
}
}
}
return nil
}
for m := range wf.MsgC {
handle(m)
}
}
// TODO Remove code duplication
func (wf *WakuFilter) AddPeer(p peer.ID, addrs []ma.Multiaddr) error {
for _, addr := range addrs {
wf.h.Peerstore().AddAddr(p, addr, peerstore.PermanentAddrTTL)
}
err := wf.h.Peerstore().AddProtocols(p, string(WakuFilterProtocolId))
if err != nil {
return err
}
return nil
}
// Having a FilterRequest struct,
// select a peer with filter support, dial it,
// and submit FilterRequest wrapped in FilterRPC
func (wf *WakuFilter) Subscribe(ctx context.Context, request pb.FilterRequest) (string, error) { //.async, gcsafe.} {
peer := wf.selectPeer()
if peer != nil {
conn, err := wf.h.NewStream(ctx, *peer, WakuFilterProtocolId)
if conn != nil {
// This is the only successful path to subscription
id := protocol.GenerateRequestId()
writer := protoio.NewDelimitedWriter(conn)
filterRPC := &pb.FilterRPC{RequestId: hex.EncodeToString(id), Request: &request}
log.Info("Sending filterRPC: ", filterRPC)
err = writer.WriteMsg(filterRPC)
return string(id), nil
} else {
// @TODO more sophisticated error handling here
log.Error("failed to connect to remote peer")
//waku_filter_errors.inc(labelValues = [dialFailure])
return "", err
}
}
return "", nil
}
func (wf *WakuFilter) Unsubscribe(ctx context.Context, request pb.FilterRequest) {
// @TODO: NO REAL REASON TO GENERATE REQUEST ID FOR UNSUBSCRIBE OTHER THAN CREATING SANE-LOOKING RPC.
peer := wf.selectPeer()
if peer != nil {
conn, err := wf.h.NewStream(ctx, *peer, WakuFilterProtocolId)
if conn != nil {
// This is the only successful path to subscription
id := protocol.GenerateRequestId()
writer := protoio.NewDelimitedWriter(conn)
filterRPC := &pb.FilterRPC{RequestId: hex.EncodeToString(id), Request: &request}
err = writer.WriteMsg(filterRPC)
//return some(id)
} else {
// @TODO more sophisticated error handling here
log.Error("failed to connect to remote peer", err)
//waku_filter_errors.inc(labelValues = [dialFailure])
}
}
}

1110
waku/v2/protocol/pb/waku_filter.pb.go Normal file
View File

File diff suppressed because it is too large Load Diff

25
waku/v2/protocol/pb/waku_filter.proto Normal file
View File

@ -0,0 +1,25 @@
syntax = "proto3";
package pb;
import "waku_message.proto";
message FilterRequest {
bool subscribe = 1;
string topic = 2;
repeated ContentFilter contentFilters = 3;
message ContentFilter {
string contentTopic = 1;
}
}
message MessagePush {
repeated WakuMessage messages = 1;
}
message FilterRPC {
string requestId = 1;
FilterRequest request = 2;
MessagePush push = 3;
}