chore: add swqos client

pkg/swqos/clients/block_razor_client.go

@@ -0,0 +1,82 @@
+package clients
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	pb "github.com/BlockRazorinc/solana-trader-client-go/pb/serverpb"
+	"github.com/gagliardetto/solana-go"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+type BlockRazorClient struct {
+	conn   *grpc.ClientConn
+	client pb.ServerClient
+}
+
+type Authentication struct {
+	apiKey string
+}
+
+func (a *Authentication) GetRequestMetadata(context.Context, ...string) (map[string]string, error) {
+	return map[string]string{"apikey": a.apiKey}, nil
+}
+
+func (a *Authentication) RequireTransportSecurity() bool {
+	return false
+}
+
+func NewBlockRazorClient(ctx context.Context, endpoint string) (*BlockRazorClient, error) {
+	if endpoint == "" {
+		return nil, nil
+	}
+
+	// setup grpc connect
+	conn, err := grpc.NewClient(
+		endpoint,
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithKeepaliveParams(kacp),
+		grpc.WithPerRPCCredentials(&Authentication{apiKey: "xhMIRxybodR6U35cDdTjQVIkUPPVVjKC5ynKWQMdL9fm8DnwoEFFAlj1E4ySBADo4xLh3RVTRgLQI2BTzegxb3N5CIXThEEJ"}), // TODO: maybe config?
+	)
+	if err != nil {
+		return nil, fmt.Errorf("connect error: %v", err)
+	}
+
+	// use the Gateway client connection interface
+	client := pb.NewServerClient(conn)
+
+	// grpc request warmup
+	_, err = client.GetHealth(ctx, &pb.HealthRequest{})
+	if err != nil {
+		return nil, err
+	}
+
+	return &BlockRazorClient{
+		conn:   conn,
+		client: client,
+	}, nil
+}
+
+func (c *BlockRazorClient) SendTransaction(ctx context.Context, tx *solana.Transaction) error {
+	if c == nil {
+		return errors.New("block razor client is nil")
+	}
+
+	txBase64, _ := tx.ToBase64()
+	_, err := c.client.SendTransaction(ctx, &pb.SendRequest{
+		Transaction: txBase64,
+		Mode:        "fast",
+		SafeWindow:  3,
+	})
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *BlockRazorClient) SendBundle(ctx context.Context, txs []*solana.Transaction) error {
+	return fmt.Errorf("block razor client not support send bundle")
+}