getLatestBlockhash gRPC Method - Solana gRPC

Solana gRPC is included with Scale and Business plans. On Build and Accelerate plans, it remains available via the Solana gRPC add-on.

Parameters

This method does not accept any parameters

Returns

slot

string

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blockhash

string

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lastValidBlockHeight

string

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Request

1
package main
2

3
import (
4
	"context"
5
	"crypto/tls"
6
	"fmt"
7
	"log"
8
	"time"
9

10
	pb "yellowstone/proto"
11

12

13
	"google.golang.org/grpc"
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	"google.golang.org/grpc/credentials"
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	"google.golang.org/grpc/encoding/gzip"
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	"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
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// endpoint will be: docs-demo.solana-mainnet.quiknode.pro:10000  {10000 is the port number for gRPC}
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// token will be : abcde123456789
23

24
var (
25
	endpoint = "YOUR_QN_ENDPOINT:10000"
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	token    = "YOUR_TOKEN_NUMBER"
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)
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func main() {
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	opts := []grpc.DialOption{
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		grpc.WithTransportCredentials(credentials.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}),
35
	}
36

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	conn, err := grpc.NewClient(endpoint, opts...)
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	if err != nil {
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		log.Fatalf("Failed to connect: %v", err)
40
	}
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	defer conn.Close()
42

43
	client := pb.NewGeyserClient(conn)
44

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    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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    defer cancel()
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    latestBlockHash, err := client.GetLatestBlockhash(ctx, &pb.GetLatestBlockhashRequest{})
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	if err != nil {
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		log.Fatalf("Failed to get latest blockhash: %v", err)
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	}
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	fmt.Printf("Latest Blockhash Information:\n")
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	fmt.Printf("  Blockhash: %+v\n", latestBlockHash)
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}

1
package main
2

3
import (
4
	"context"
5
	"crypto/tls"
6
	"fmt"
7
	"log"
8
	"time"
9

10
	pb "yellowstone/proto"
11

12

13
	"google.golang.org/grpc"
14
	"google.golang.org/grpc/credentials"
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:10000  {10000 is the port number for gRPC}
22
// token will be : abcde123456789
23

24
var (
25
	endpoint = "YOUR_QN_ENDPOINT:10000"
26
	token    = "YOUR_TOKEN_NUMBER"
27
)
28

29
func main() {
30
	opts := []grpc.DialOption{
31
		grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})),
32
		grpc.WithKeepaliveParams(kacp),
33
		grpc.WithDefaultCallOptions(grpc.MaxCallRecvMsgSize(1024*1024*1024), grpc.UseCompressor(gzip.Name)),
34
		grpc.WithPerRPCCredentials(tokenAuth{token: token}),
35
	}
36

37
	conn, err := grpc.NewClient(endpoint, opts...)
38
	if err != nil {
39
		log.Fatalf("Failed to connect: %v", err)
40
	}
41
	defer conn.Close()
42

43
	client := pb.NewGeyserClient(conn)
44

45
    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
46
    defer cancel()
47

48
    latestBlockHash, err := client.GetLatestBlockhash(ctx, &pb.GetLatestBlockhashRequest{})
49
	if err != nil {
50
		log.Fatalf("Failed to get latest blockhash: %v", err)
51
	}
52

53
	fmt.Printf("Latest Blockhash Information:\n")
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	fmt.Printf("  Blockhash: %+v\n", latestBlockHash)
55

56
}

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: docs-demo.solana-mainnet.quiknode.pro:10000  {10000 is the port number for gRPC}
6
// token will be : abcde123456789
7

8
const ENDPOINT = "YOUR_QN_ENDPOINT:10000";
9
const TOKEN = "YOUR_TOKEN_NUMBER";
10

11
async function main() {
12
    const client = new Client(ENDPOINT, TOKEN, {});
13

14
    const commitment = CommitmentLevel.CONFIRMED;
15

16
    try {
17
        const response = await client.getLatestBlockhash(commitment);
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        console.log(`Latest Blockhash: ${JSON.stringify(response, null, 2)}`);
19
    } catch (error) {
20
        console.error("Error fetching latest blockhash:", error);
21
    }
22
}
23

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main()
25
    .catch((err) => {
26
        console.error("Unhandled error:", err);
27
        process.exit(1);
28
    });

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: docs-demo.solana-mainnet.quiknode.pro:10000  {10000 is the port number for gRPC}
6
// token will be : abcde123456789
7

8
const ENDPOINT = "YOUR_QN_ENDPOINT:10000";
9
const TOKEN = "YOUR_TOKEN_NUMBER";
10

11
async function main() {
12
    const client = new Client(ENDPOINT, TOKEN, {});
13

14
    const commitment = CommitmentLevel.CONFIRMED;
15

16
    try {
17
        const response = await client.getLatestBlockhash(commitment);
18
        console.log(`Latest Blockhash: ${JSON.stringify(response, null, 2)}`);
19
    } catch (error) {
20
        console.error("Error fetching latest blockhash:", error);
21
    }
22
}
23

24
main()
25
    .catch((err) => {
26
        console.error("Unhandled error:", err);
27
        process.exit(1);
28
    });

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