GetCheckpoint gRPC Method

Parameters

sequence_number

string

The sequence number of the checkpoint to retrieve. If omitted, the latest checkpoint will be returned.

read_mask

object

Field mask specifying which fields of the checkpoint to include in the response.

paths

array

List of field names to include (e.g., 'sequence_number', 'digest').

Returns

sequenceNumber

string

The numeric identifier of the returned checkpoint in the global sequence of checkpoints.

digest

string

The cryptographic digest that uniquely identifies the checkpoint.

Request

grpcurl -proto ./sui/rpc/v2beta/ledger_service.proto -H "x-token: YOUR_TOKEN_VALUE" -d '{
  "sequence_number": "1000",
  "read_mask": {
    "paths": [
      "sequence_number",
      "digest"
    ]
  }
}' docs-demo.sui-mainnet.quiknode.pro:9000 sui.rpc.v2beta.LedgerService/GetCheckpoint

package main

import (
	"context"
	"crypto/tls"
	"encoding/json"
	"fmt"
	"log"
	"time"

	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/types/known/fieldmaskpb"

	pb "sui-grpc/sui/proto/generated/sui/rpc/v2beta"  // Your Generated .pb.go files path
)

// QuickNode endpoints consist of two crucial components: the endpoint name and the corresponding token
// For eg: QN Endpoint: https://docs-demo.sui-mainnet.quiknode.pro/abcde123456789
// endpoint will be: docs-demo.sui-mainnet.quiknode.pro:9000  {9000 is the port number for Sui gRPC}
// token will be : abcde123456789

var (
	token    = "YOUR_TOKEN_NUMBER"
	endpoint = "YOUR_QN_ENDPOINT:9000"
)

// x-token authentication
type auth struct {
	token string
}

func (a *auth) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
	return map[string]string{
		"x-token": a.token,
	}, nil
}

func (a *auth) RequireTransportSecurity() bool {
	return true
}

func main() {
	// TLS credentials
	creds := credentials.NewTLS(&tls.Config{})
	opts := []grpc.DialOption{
		grpc.WithTransportCredentials(creds),
		grpc.WithPerRPCCredentials(&auth{token}),
	}

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

	client := pb.NewLedgerServiceClient(conn)

	// Request for sequence_number = 1000
	seq := uint64(1000)
	req := &pb.GetCheckpointRequest{
		CheckpointId: &pb.GetCheckpointRequest_SequenceNumber{
			SequenceNumber: seq,
		},
		ReadMask: &fieldmaskpb.FieldMask{
			Paths: []string{"sequence_number", "digest"},
		},
	}

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

	resp, err := client.GetCheckpoint(ctx, req)
	if err != nil {
		log.Fatalf("GetCheckpoint failed: %v", err)
	}

	marshaler := protojson.MarshalOptions{
		UseProtoNames:   true,
		EmitUnpopulated: true,
		Indent:          "  ",
	}

	jsonBytes, err := marshaler.Marshal(resp)
	if err != nil {
		log.Fatalf("Failed to marshal: %v", err)
	}

	var pretty map[string]interface{}
	if err := json.Unmarshal(jsonBytes, &pretty); err != nil {
		log.Fatalf("Failed to unmarshal: %v", err)
	}

	formatted, _ := json.MarshalIndent(pretty, "", "  ")
	fmt.Println(string(formatted))
}

import * as grpc from '@grpc/grpc-js';
import * as protoLoader from '@grpc/proto-loader';
import * as path from 'path';

// Configuration
const PROTO_PATH = path.join(__dirname, 'protos/sui/rpc/v2beta/ledger_service.proto');

// QuickNode endpoints consist of two crucial components: the endpoint name and the corresponding token
// For eg: QN Endpoint: https://docs-demo.sui-mainnet.quiknode.pro/abcde123456789
// endpoint will be: docs-demo.sui-mainnet.quiknode.pro:9000  {9000 is the port number for Sui gRPC}
// token will be : abcde123456789

const endpoint = 'docs-demo.sui-mainnet.quiknode.pro:9000';
const token = 'abcde123456789';

// Load protobuf definitions
const packageDefinition = protoLoader.loadSync(PROTO_PATH, {
  keepCase: true,
  longs: String,
  enums: String,
  defaults: true,
  oneofs: true,
  includeDirs: [path.join(__dirname, 'protos')],
});

const proto = grpc.loadPackageDefinition(packageDefinition) as any;
const LedgerService = proto.sui.rpc.v2beta.LedgerService;

// Create secure client
const client = new LedgerService(endpoint, grpc.credentials.createSsl());

// Metadata for authentication
const metadata = new grpc.Metadata();
metadata.add('x-token', token);

// Construct request with field mask
const request = {
  sequence_number: 1000, // Replace as needed
  read_mask: {
    paths: ['sequence_number', 'digest'],
  },
};

// Perform gRPC call
client.GetCheckpoint(request, metadata, (err: grpc.ServiceError | null, response: any) => {
  if (err) {
    console.error('gRPC Error:', {
      code: err.code,
      message: err.message,
      details: err.details,
    });
  } else {
    console.log('Checkpoint Response:');
    console.log(JSON.stringify(response, null, 2));
  }
});

import grpc
import json
from google.protobuf.field_mask_pb2 import FieldMask
from google.protobuf.json_format import MessageToDict
from sui.rpc.v2beta import ledger_service_pb2, ledger_service_pb2_grpc


def get_checkpoint():
    # QuickNode endpoints consist of two crucial components: the endpoint name and the corresponding token
    # For eg: QN Endpoint: https://docs-demo.sui-mainnet.quiknode.pro/abcde123456789
    # endpoint will be: docs-demo.sui-mainnet.quiknode.pro:9000  {9000 is the port number for Sui gRPC}
    # token will be: abcde123456789

    endpoint = 'docs-demo.sui-mainnet.quiknode.pro:9000';
    token = 'YOUR_TOKEN_HERE';

    channel = grpc.secure_channel(endpoint, grpc.ssl_channel_credentials())
    stub = ledger_service_pb2_grpc.LedgerServiceStub(channel)

    # You can specify a checkpoint by sequence_number or digest
    # Using sequence_number here as an example
    sequence_number = 1000  # Replace with the actual checkpoint sequence number you want to retrieve
    
    # Create a field mask to specify which fields to include in the response
    read_mask = FieldMask(paths=[
        "sequence_number",
        "digest"
    ])

    # Prepare the GetCheckpointRequest
    request = ledger_service_pb2.GetCheckpointRequest(
        sequence_number=sequence_number,
        read_mask=read_mask
    )

    metadata = [("x-token", token)]

    return stub.GetCheckpoint(request, metadata=metadata)


def parse_response_to_json(response):
    return json.dumps(
        MessageToDict(response, preserving_proto_field_name=True),
        indent=2
    )


def main():
    try:
        response = get_checkpoint()
        print(parse_response_to_json(response))
    except grpc.RpcError as e:
        print(f"{e.code().name}: {e.details()}")


if __name__ == "__main__":
    main()

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