LedgerService/GetServiceInfo - SUI

Example code for the LedgerService/GetServiceInfo gRPC method. Complete guide on how to use LedgerService/GetServiceInfo gRPC method in GetBlock Web3 documentation.

Returns general information about the Sui node's current state, including the chain ID, network name (mainnet, testnet, devnet), current epoch, current checkpoint height, and the range of locally available checkpoints. This is the most useful single method for confirming connectivity, sync status, and whether a node serves archival or only recent data.

Service: sui.rpc.v2.LedgerService Proto file: sui/rpc/v2/ledger_service.proto Full method path: sui.rpc.v2.LedgerService/GetServiceInfo

Request Fields

• The request message is empty — no fields are required.

Request Example

grpcurl

# Clone the official proto files first (one-time setup):
#   git clone https://github.com/MystenLabs/sui-apis.git && cd sui-apis

grpcurl \
  -import-path proto \
  -proto sui/rpc/v2/ledger_service.proto \
  -H "x-grpc-web: 1" \
  -d '{}' \
  go.getblock.io:443/<ACCESS-TOKEN> \
  sui.rpc.v2.LedgerService/GetServiceInfo

TypeScript (@grpc/grpc-js)

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

const PROTO_PATH = path.join(__dirname, 'protos/proto/sui/rpc/v2/ledger_service.proto');
const ACCESS_TOKEN = '<ACCESS-TOKEN>';

const packageDef = protoLoader.loadSync(PROTO_PATH, {
    includeDirs: [path.join(__dirname, 'protos/proto')],
    keepCase: true, longs: String, enums: String, defaults: true,
});
const proto = grpc.loadPackageDefinition(packageDef) as any;
const ServiceClient = proto.sui.rpc.v2.LedgerService;

const metadata = new grpc.Metadata();
metadata.add('authorization', `Bearer ${ACCESS_TOKEN}`);

const client = new ServiceClient('go.getblock.io:443', grpc.credentials.createSsl());

const request = {};

client.GetServiceInfo(request, metadata, (err: any, response: any) => {
    if (err) {
        console.error('Error:', err);
        return;
    }
    console.log(JSON.stringify(response, null, 2));
});

Python (grpcio)

# First generate Python stubs from the proto files (one-time setup):
#   pip install grpcio grpcio-tools
#   python -m grpc_tools.protoc -I=proto --python_out=. --grpc_python_out=. \
#       proto/sui/rpc/v2/ledger_service.proto

import grpc
from sui.rpc.v2 import sui_rpc_v2_ledger_service_pb2, sui_rpc_v2_ledger_service_pb2_grpc
from google.protobuf.json_format import ParseDict, MessageToJson

ACCESS_TOKEN = '<ACCESS-TOKEN>'

channel = grpc.secure_channel('go.getblock.io:443', grpc.ssl_channel_credentials())
stub = sui_rpc_v2_ledger_service_pb2_grpc.LedgerServiceStub(channel)

metadata = [('authorization', f'Bearer {ACCESS_TOKEN}')]

# Build the request message from a dict via ParseDict for readability
request_data = {}
request = ParseDict(request_data, sui_rpc_v2_ledger_service_pb2.LedgerRequest())
# (Use the appropriate <Method>Request type — adjust as needed for the specific method.)

response = stub.GetServiceInfo(request, metadata=metadata)
print(response)

Rust (tonic)

// Add to Cargo.toml:
//   tonic = "0.12"
//   prost = "0.13"
//   tokio = { version = "1", features = ["full"] }
// Plus a build.rs invoking tonic_build on the Sui proto files.

use tonic::{transport::Channel, Request};
use sui_rpc_v2::ledger_service_client::LedgerServiceClient;
// Plus the relevant <Method>Request type import from sui_rpc_v2.

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let channel = Channel::from_static("https://go.getblock.io").connect().await?;
    let mut client = LedgerServiceClient::with_interceptor(channel, |mut req: Request<()>| {
        req.metadata_mut().insert("authorization", "Bearer <ACCESS-TOKEN>".parse().unwrap());
        Ok(req)
    });

    let request_json = r#"{}"#;
    let request = Request::new(serde_json::from_str(request_json)?);

    let response = client.get_service_info(request).await?;
    println!("Response: {:?}", response.into_inner());
    Ok(())
}

Response Example

Responses are encoded in Protocol Buffers binary format on the wire. The example below shows the protobuf JSON encoding for readability.

{
    "chain_id": "4btiuiMPvEENsttpZC7CZ53DruC3MAgfznDbASZ7DR6S",
    "chain": "mainnet",
    "epoch": "1084",
    "checkpoint_height": "260411497",
    "timestamp": {
        "seconds": "1775050511",
        "nanos": 19000000
    },
    "lowest_available_checkpoint": "259896745",
    "lowest_available_checkpoint_objects": "259896745",
    "server": "sui-node/1.68.1-3c0f387ebb40"
}

Response Fields

Field	Type	Description
chain_id	string	Genesis-derived chain identifier; mainnet is 4btiuiMPvEENsttpZC7CZ53DruC3MAgfznDbASZ7DR6S
chain	string	Network name — mainnet, testnet, or devnet
epoch	string	Current epoch number (uint64 as decimal string)
checkpoint_height	string	Latest executed checkpoint sequence number
timestamp	Timestamp	Timestamp of the latest checkpoint — seconds and nanos since Unix epoch
lowest_available_checkpoint	string	Lowest checkpoint stored locally — useful for detecting archive vs pruning nodes
lowest_available_checkpoint_objects	string	Lowest checkpoint with full object data available
server	string	Sui node software version string

Use Cases

• Confirming connectivity and network identity (mainnet vs testnet)

• Sync-status monitoring before routing reads

• Detecting archive vs pruning nodes via lowest_available_checkpoint

• Single-call health check before launching application workloads

Error Handling

gRPC uses status codes rather than JSON-RPC numeric error codes. The most relevant for this method:

Status Code	Numeric	Cause
UNAUTHENTICATED	16	Missing or invalid <ACCESS-TOKEN> in the URL path
INVALID_ARGUMENT	3	Request fields are missing, malformed, or fail validation
UNAVAILABLE	14	Node is overloaded or temporarily unable to handle the request — retry with backoff
DEADLINE_EXCEEDED	4	Request did not complete within the timeout window
RESOURCE_EXHAUSTED	8	Rate limit exceeded for your plan

SDK Integration

@mysten/sui (TypeScript)

// The Mysten Labs TypeScript SDK provides higher-level wrappers around the
// gRPC API. Use @mysten/sui for typed client access:

import { SuiClient } from '@mysten/sui/client';

const client = new SuiClient({
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/'
});

// Refer to the @mysten/sui API reference for the typed wrapper of this method;
// raw gRPC call to sui.rpc.v2.LedgerService/GetServiceInfo is available as shown in the
// Request Example tabs above.

pysui (Python)

# pysui is the community-maintained Python SDK for Sui (Mysten Labs does not
# yet publish an official Python SDK). For raw gRPC access, use grpcio with
# the generated proto stubs as shown in the Request Example tabs above.

from pysui import SuiConfig, SyncClient

config = SuiConfig.user_config(
    rpc_url='https://go.getblock.io/<ACCESS-TOKEN>/'
)
client = SyncClient(config)

# Consult pysui docs for the wrapper of LedgerService.GetServiceInfo.