StreamBuilderFills - Stream Builder Fills

package main

import (
    "context"
    "crypto/tls"
    "log"
    "os"

    pb "example.com/hyperliquid-v3-client/gen/v3"
    "google.golang.org/grpc"
    "google.golang.org/grpc/credentials"
    "google.golang.org/grpc/metadata"
)

func main() {
    endpoint, apiKey := os.Getenv("HYPERLIQUID_GRPC_ENDPOINT"), os.Getenv("DWELLIR_API_KEY")
    if endpoint == "" || apiKey == "" {
        log.Fatal("set HYPERLIQUID_GRPC_ENDPOINT and DWELLIR_API_KEY")
    }
    conn, err := grpc.NewClient(endpoint, grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{MinVersion: tls.VersionTLS12})))
    if err != nil {
        log.Fatal(err)
    }
    defer conn.Close()
    ctx := metadata.AppendToOutgoingContext(context.Background(), "x-api-key", apiKey)
    stream, err := pb.NewMarketStreamingClient(conn).StreamBuilderFills(ctx, &pb.BuilderFillsRequest{
        Builder: "0x2222222222222222222222222222222222222222",
        Coins: []string{"BTC", "ETH"},
    })
    if err != nil {
        log.Fatal(err)
    }
    var last uint64
    for {
        update, err := stream.Recv()
        if err != nil {
            log.Fatal(err)
        }
        if update.GetSequence() != last+1 {
            log.Fatalf("sequence gap: got=%d expected=%d", update.GetSequence(), last+1)
        }
        last = update.GetSequence()
        log.Printf("block=%d sequence=%d fills=%d", update.GetBlockNumber(), update.GetSequence(), len(update.GetFills()))
    }
}