getLatestBlockhash gRPC Method - Solana gRPC

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

パラメータ

commitment

文字列

読み込み中...

PROCESSED

文字列

読み込み中...

CONFIRMED

文字列

読み込み中...

FINALIZED

文字列

読み込み中...

返します

slot

文字列

読み込み中...

blockhash

文字列

読み込み中...

lastValidBlockHeight

文字列

読み込み中...

リクエスト

1
パッケージ main
2

3
インポート (
4
	「文脈」
5
	"crypto/tls"
6
	"fmt"
7
	「ログ」
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"
27
)
28

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

35
type tokenAuth struct {
36
	トークン 文字列
37
}
38

39
func (t tokenAuth) GetRequestMetadata(ctx context.Context, in ...string) (map[string]string, error) {
40
	戻る map[文字列]文字列{
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		"x-token": t.token,
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	}, nil
43
}
44

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

49
func main() {
50
	opts := []grpc.DialOption{
51
		grpc.WithTransportCredentialsWithTransportCredentials(credentials.NewTLS(&tls.設定{})),
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
	もし err != nil {
59
		log.Fatalf("Failed to connect: %v", err)
60
	}
61
	延期 conn.閉じる()
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
	もし err != nil {
70
		log.Fatalf("Failed to get latest blockhash: %v", err)
71
	}
72

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

76
}
77

1
パッケージ main
2

3
インポート (
4
	「文脈」
5
	"crypto/tls"
6
	"fmt"
7
	「ログ」
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
	トークン 文字列
37
}
38

39
func (t tokenAuth) GetRequestMetadata(ctx context.Context, in ...string) (map[string]string, error) {
40
	戻る map[文字列]文字列{
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.WithTransportCredentialsWithTransportCredentials(credentials.NewTLS(&tls.設定{})),
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
	もし err != nil {
59
		log.Fatalf("Failed to connect: %v", err)
60
	}
61
	延期 conn.閉じる()
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
	もし 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 関数 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 関数 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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