chore: add shrederClient exaple

cmd/shreder/main.go

@@ -1,7 +1,76 @@
 package main
 
-import "fmt"
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/samlior/libsam/pkg/logger"
+	"github.com/samlior/libsam/pkg/shreder"
+	"github.com/samlior/libsam/pkg/types"
+	"github.com/samlior/libsam/third_party/shreder_protos"
+)
 
 func main() {
-	fmt.Println("Hello, World!")
+	url := os.Getenv("URL")
+	if url == "" {
+		panic("URL is not set")
+	}
+
+	logger := logger.NewEmptyLogger()
+	shrederClient, cleanup, err := shreder.NewShrederClient(
+		logger,
+		url,
+		map[string]*shreder_protos.SubscribeRequestFilterTransactions{
+			"pumpfunamm": {
+				AccountRequired: []string{
+					"pAMMBay6oceH9fJKBRHGP5D4bD4sWpmSwMn52FMfXEA",
+				},
+			},
+			"photon": {
+				AccountRequired: []string{
+					"BSfD6SHZigAfDWSjzD5Q41jw8LmKwtmjskPH9XW1mrRW",
+				},
+			},
+			// TODO: axiom, gmgn, etc.
+		})
+	if err != nil {
+		panic(err)
+	}
+	defer cleanup()
+
+	txCh := make(chan types.TxSignalBatch, 1000)
+
+	exitSignal := make(chan os.Signal, 1)
+	ctx, cancel := context.WithCancel(context.Background())
+	signal.Notify(exitSignal, syscall.SIGINT, syscall.SIGTERM)
+
+	go func() {
+		<-exitSignal
+		cancel()
+	}()
+
+	// async read from shreder
+	go func() {
+		err := shrederClient.ReadSync(ctx, txCh)
+		if err != nil {
+			if !errors.Is(err, context.Canceled) {
+				panic(err)
+			}
+		}
+	}()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case txBatch := <-txCh:
+			jsonData, _ := json.MarshalIndent(txBatch, "", "  ")
+			fmt.Println(string(jsonData))
+		}
+	}
 }