108 lines
2.7 KiB
Go
108 lines
2.7 KiB
Go
package main
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import (
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"context"
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"fmt"
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"time"
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"github.com/ethereum/go-ethereum/rpc"
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)
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// NOTE Can be generalized with different transports (HTTP, IPC, WS etc)
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// https://github.com/ethereum/go-ethereum/blob/master/rpc/client.go#L169
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// Later: Generalize with CallContext (not prio)
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// TODO Move to types
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type WakuInfo struct {
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ListenStr string `json:"listenStr"`
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}
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// XXX in this case Payload isn't string but something else
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// panic: json: cannot unmarshal array into Go struct field WakuMessage.messages.payload of type string
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// TODO This should be toy-chat protobuf probably
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type WakuMessage struct {
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// TODO Should be hex encoded string here
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Payload []byte `json:"payload"`
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ContentTopic string `json:"contentTopic"`
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Version int `json:"version"`
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Timestamp float64 `json:"timestamp"`
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}
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type WakuRelayMessage struct {
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Payload string `json:"payload"`
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ContentTopic string `json:"contentTopic"`
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// Version int `json:"version"`
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// Timestamp float64 `json:"timestamp"`
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}
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type StoreResponse struct {
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Messages []WakuMessage `json:"messages"`
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}
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type ContentFilter struct {
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ContentTopic string `json:"contentTopic"`
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}
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func getWakuDebugInfo(client *rpc.Client) WakuInfo {
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var wakuInfo WakuInfo
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if err := client.Call(&wakuInfo, "get_waku_v2_debug_v1_info"); err != nil {
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panic(err)
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}
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return wakuInfo
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}
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// TODO Support more args
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func getWakuStoreMessages(client *rpc.Client, contentTopic string) StoreResponse {
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var storeResponse StoreResponse
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var contentFilter = ContentFilter{contentTopic}
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var contentFilters []ContentFilter
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contentFilters = append(contentFilters, contentFilter)
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if err := client.Call(&storeResponse, "get_waku_v2_store_v1_messages", "", contentFilters); err != nil {
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panic(err)
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}
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return storeResponse
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}
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func postWakuRelayMessage(client *rpc.Client, message WakuRelayMessage) bool {
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var topic = "/waku/2/default-waku/proto"
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var res bool
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if err := client.Call(&res, "post_waku_v2_relay_v1_message", topic, message); err != nil {
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panic(err)
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}
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return res
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}
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// TODO Subscribe
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func main() {
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fmt.Println("JSON RPC request...")
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_, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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// Assumes node started
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client, _ := rpc.Dial("http://127.0.0.1:8545")
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// Get node info
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var wakuInfo = getWakuDebugInfo(client)
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fmt.Println("WakuInfo ListenStr", wakuInfo.ListenStr)
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// Query messages
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var contentTopic = "/toy-chat/2/huilong/proto"
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var storeResponse = getWakuStoreMessages(client, contentTopic)
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fmt.Println("Fetched", len(storeResponse.Messages), "messages")
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// Publish
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var message = WakuRelayMessage{Payload: "0x1a2b3c4d5e6f", ContentTopic: contentTopic}
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var res = postWakuRelayMessage(client, message)
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fmt.Println("Publish", res)
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}
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