getLatestBlockhash gRPC Method - Solana gRPC

Solana gRPC is included with Scale plans and up. Learn more on our pricing page.

參數

commitment

字串

載入中...

PROCESSED

字串

載入中...

CONFIRMED

字串

載入中...

FINALIZED

字串

載入中...

退貨

slot

字串

載入中...

blockhash

字串

載入中...

lastValidBlockHeight

字串

載入中...

請求

1
套件 主函式
2

3
匯入 (
4
	"上下文"
5
	"crypto/tls"
6
	"fmt"
7
	"log"
8
	「時間」
9

10
	pb "yellowstone/proto"
11

12

13
	"google.golang.grpc"
14
	"google.golang.grpc"
15
	"google.golang.org/grpc/encoding/gzip"
16
	"google.golang.org/grpc/keepalive"
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)
18

19
// Quicknode endpoints consist of two crucial components: the endpoint name and the corresponding token
20
// For eg: QN Endpoint: https://docs-demo.solana-mainnet.quiknode.pro/abcde123456789
21
// endpoint will be: docs-demo.solana-mainnet.quiknode.pro:443  {443 is the port number for gRPC}
22
// token will be : abcde123456789
23

24
var (
25
	endpoint = "YOUR_QN_ENDPOINT:443"
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	token    = "YOUR_TOKEN_NUMBER"
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)
28

29
var kacp = keepalive.ClientParameters{
30
	Time:                10 * time.Second,
31
	Timeout:             time.Second,
32
	PermitWithoutStream: true,
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}
34

35
type tokenAuth struct {
36
	代幣 字串
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}
38

39
func (t tokenAuth) GetRequestMetadata(ctx context.Context, in ...string) (map[string]string, error) {
40
	返回 地圖[字串]字串{
41
		"x-token": t.token,
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	}, nil
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}
44

45
func (tokenAuth) RequireTransportSecurity() bool {
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	return true
47
}
48

49
func main() {
50
	opts := []grpc.DialOption{
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		grpc.WithTransportCredentials(憑證.NewTLS(&tls.Config{})),
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		grpc.WithKeepaliveParams(kacp),
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		grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(1024*1024*1024), grpc.UseCompressor(gzip.Name)),
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		grpc.WithPerRPCCredentials(tokenAuth{token: token}),
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	}
56

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	conn, err := grpc.NewClient(endpoint, opts...)
58
	如果 err != nil {
59
		log.Fatalf("Failed to connect: %v", err)
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	}
61
	延後 延遲連接.關閉()
62

63
	client := pb.NewGeyserClient(conn)
64

65
    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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    defer cancel()
67

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    latestBlockHash, err := client.GetLatestBlockhash(ctx, &pb.GetLatestBlockhashRequest{})
69
	如果 err != nil {
70
		log.Fatalf("Failed to get latest blockhash: %v", err)
71
	}
72

73
	fmt.Printf("Latest Blockhash Information:\n")
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	fmt.Printf("  Blockhash: %+v\n", latestBlockHash)
75

76
}
77

1
套件 主函式
2

3
匯入 (
4
	"上下文"
5
	"crypto/tls"
6
	"fmt"
7
	"log"
8
	「時間」
9

10
	pb "yellowstone/proto"
11

12

13
	"google.golang.grpc"
14
	"google.golang.grpc"
15
	"google.golang.org/grpc/encoding/gzip"
16
	"google.golang.org/grpc/keepalive"
17
)
18

19
// Quicknode endpoints consist of two crucial components: the endpoint name and the corresponding token
20
// For eg: QN Endpoint: https://docs-demo.solana-mainnet.quiknode.pro/abcde123456789
21
// endpoint will be: docs-demo.solana-mainnet.quiknode.pro:443  {443 is the port number for gRPC}
22
// token will be : abcde123456789
23

24
var (
25
	endpoint = "YOUR_QN_ENDPOINT:443"
26
	token    = "YOUR_TOKEN_NUMBER"
27
)
28

29
var kacp = keepalive.ClientParameters{
30
	Time:                10 * time.Second,
31
	Timeout:             time.Second,
32
	PermitWithoutStream: true,
33
}
34

35
type tokenAuth struct {
36
	代幣 字串
37
}
38

39
func (t tokenAuth) GetRequestMetadata(ctx context.Context, in ...string) (map[string]string, error) {
40
	返回 地圖[字串]字串{
41
		"x-token": t.token,
42
	}, nil
43
}
44

45
func (tokenAuth) RequireTransportSecurity() bool {
46
	return true
47
}
48

49
func main() {
50
	opts := []grpc.DialOption{
51
		grpc.WithTransportCredentials(憑證.NewTLS(&tls.Config{})),
52
		grpc.WithKeepaliveParams(kacp),
53
		grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(1024*1024*1024), grpc.UseCompressor(gzip.Name)),
54
		grpc.WithPerRPCCredentials(tokenAuth{token: token}),
55
	}
56

57
	conn, err := grpc.NewClient(endpoint, opts...)
58
	如果 err != nil {
59
		log.Fatalf("Failed to connect: %v", err)
60
	}
61
	延後 延遲連接.關閉()
62

63
	client := pb.NewGeyserClient(conn)
64

65
    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
66
    defer cancel()
67

68
    latestBlockHash, err := client.GetLatestBlockhash(ctx, &pb.GetLatestBlockhashRequest{})
69
	如果 err != nil {
70
		log.Fatalf("Failed to get latest blockhash: %v", err)
71
	}
72

73
	fmt.Printf("Latest Blockhash Information:\n")
74
	fmt.Printf("  Blockhash: %+v\n", latestBlockHash)
75

76
}
77

1
import Client, { CommitmentLevel } from "@triton-one/yellowstone-grpc";
2

3
// Quicknode endpoints consist of two crucial components: the endpoint name and the corresponding token
4
// For eg: QN Endpoint: https://docs-demo.solana-mainnet.quiknode.pro/abcde123456789
5
// endpoint will be: https://docs-demo.solana-mainnet.quiknode.pro:443  {443 is the port number for gRPC}
6
// token will be : abcde123456789
7

8
const ENDPOINT = "https://YOUR_QN_ENDPOINT:443";
9
const TOKEN = "YOUR_TOKEN_NUMBER";
10

11
async 函式 main() {
12
    const client = new Client(ENDPOINT, TOKEN, {
13
        grpcDefaultCompressionAlgorithm: 0, // 0 = gzip, 1 = zstd
14
    });
15
    await client.connect();
16

17
    const commitment = CommitmentLevel.CONFIRMED;
18

19
    try {
20
        const response = await client.getLatestBlockhash(commitment);
21
        console.log(`Latest Blockhash: ${JSON.stringify(response, null, 2)}`);
22
    } catch (error) {
23
        console.error("Error fetching latest blockhash:", error);
24
    }
25
}
26

27
main()
28
    .catch((err) => {
29
        console.error("Unhandled error:", err);
30
        process.exit(1);
31
    });
32

1
import Client, { CommitmentLevel } from "@triton-one/yellowstone-grpc";
2

3
// Quicknode endpoints consist of two crucial components: the endpoint name and the corresponding token
4
// For eg: QN Endpoint: https://docs-demo.solana-mainnet.quiknode.pro/abcde123456789
5
// endpoint will be: https://docs-demo.solana-mainnet.quiknode.pro:443  {443 is the port number for gRPC}
6
// token will be : abcde123456789
7

8
const ENDPOINT = "https://YOUR_QN_ENDPOINT:443";
9
const TOKEN = "YOUR_TOKEN_NUMBER";
10

11
async 函式 main() {
12
    const client = new Client(ENDPOINT, TOKEN, {
13
        grpcDefaultCompressionAlgorithm: 0, // 0 = gzip, 1 = zstd
14
    });
15
    await client.connect();
16

17
    const commitment = CommitmentLevel.CONFIRMED;
18

19
    try {
20
        const response = await client.getLatestBlockhash(commitment);
21
        console.log(`Latest Blockhash: ${JSON.stringify(response, null, 2)}`);
22
    } catch (error) {
23
        console.error("Error fetching latest blockhash:", error);
24
    }
25
}
26

27
main()
28
    .catch((err) => {
29
        console.error("Unhandled error:", err);
30
        process.exit(1);
31
    });
32

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