Slot and Block Monitoring
Monitor Solana slots and blocks with transaction details.
Slot and Block Monitoring with Yellowstone gRPC
This guide demonstrates how to use Yellowstone gRPC to monitor slots and blocks on Solana. You'll learn how to track slot updates, block creation, and block metadata with reliable reconnection handling.
TypeScript Implementation
import Client, { CommitmentLevel, SubscribeRequest } from "@triton-one/yellowstone-grpc";
import * as bs58 from 'bs58';
class GrpcStreamManager {
private client: Client;
private stream: any;
private isConnected: boolean = false;
private reconnectAttempts: number = 0;
private readonly maxReconnectAttempts: number = 10;
private readonly reconnectInterval: number = 5000; // 5 seconds
private readonly dataHandler: (data: any) => void;
constructor(
endpoint: string,
authToken: string,
dataHandler: (data: any) => void
) {
this.client = new Client(
endpoint,
authToken,
{ "grpc.max_receive_message_length": 64 * 1024 * 1024 }
);
this.dataHandler = dataHandler;
}
async connect(subscribeRequest: SubscribeRequest): Promise<void> {
try {
this.stream = await this.client.subscribe();
this.isConnected = true;
this.reconnectAttempts = 0;
this.stream.on("data", this.handleData.bind(this));
this.stream.on("error", this.handleError.bind(this));
this.stream.on("end", () => this.handleDisconnect(subscribeRequest));
this.stream.on("close", () => this.handleDisconnect(subscribeRequest));
await this.write(subscribeRequest);
this.startPing();
} catch (error) {
console.error("Connection error:", error);
await this.reconnect(subscribeRequest);
}
}
private async write(req: SubscribeRequest): Promise<void> {
return new Promise((resolve, reject) => {
this.stream.write(req, (err: any) => err ? reject(err) : resolve());
});
}
private async reconnect(subscribeRequest: SubscribeRequest): Promise<void> {
if (this.reconnectAttempts >= this.maxReconnectAttempts) {
console.error("Max reconnection attempts reached");
return;
}
this.reconnectAttempts++;
console.log(`Reconnecting... Attempt ${this.reconnectAttempts}`);
setTimeout(async () => {
try {
await this.connect(subscribeRequest);
} catch (error) {
console.error("Reconnection failed:", error);
await this.reconnect(subscribeRequest);
}
}, this.reconnectInterval * Math.min(this.reconnectAttempts, 5));
}
private startPing(): void {
setInterval(() => {
if (this.isConnected) {
this.write({
ping: { id: 1 },
accounts: {},
accountsDataSlice: [],
transactions: {},
blocks: {},
blocksMeta: {},
entry: {},
slots: {},
transactionsStatus: {},
}).catch(console.error);
}
}, 30000);
}
private handleData(data: any): void {
try {
const processed = this.processBuffers(data);
this.dataHandler(processed);
} catch (error) {
console.error("Error processing data:", error);
}
}
private handleError(error: any): void {
console.error("Stream error:", error);
this.isConnected = false;
}
private handleDisconnect(subscribeRequest: SubscribeRequest): void {
console.log("Stream disconnected");
this.isConnected = false;
this.reconnect(subscribeRequest);
}
private processBuffers(obj: any): any {
if (!obj) return obj;
if (Buffer.isBuffer(obj) || obj instanceof Uint8Array) {
return bs58.default.encode(obj);
}
if (Array.isArray(obj)) {
return obj.map(item => this.processBuffers(item));
}
if (typeof obj === 'object') {
return Object.fromEntries(
Object.entries(obj).map(([k, v]) => [k, this.processBuffers(v)])
);
}
return obj;
}
}
// Block monitoring implementation
async function monitorBlocks() {
const manager = new GrpcStreamManager(
"your-grpc-url:2053",
"your-x-token",,
handleBlockUpdate
);
const subscribeRequest: SubscribeRequest = {
blocks: {
blockSubscribe: {
accountInclude: [
"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA", // Token Program
"11111111111111111111111111111111", // System Program
"So11111111111111111111111111111111111111112" // Wrapped SOL
],
includeTransactions: true,
includeAccounts: true,
includeEntries: false
}
},
accounts: {},
accountsDataSlice: [],
slots: {},
transactions: {},
blocksMeta: {},
entry: {},
transactionsStatus: {},
commitment: CommitmentLevel.CONFIRMED,
};
console.log('Starting block monitoring...');
console.log('Monitoring blocks for Token Program, System Program, and Wrapped SOL activities...');
await manager.connect(subscribeRequest);
}
function handleBlockUpdate(data: any): void {
if (data?.block) {
const block = data.block;
console.log('\n=== Block Details ===');
console.log(`Slot: ${block.slot}`);
console.log(`Parent Slot: ${block.parentSlot}`);
console.log(`Blockhash: ${block.blockhash}`);
console.log(`Previous Blockhash: ${block.previousBlockhash}`);
if (block.transactions?.length > 0) {
console.log('\n=== Block Transactions ===');
console.log(`Transaction Count: ${block.transactions.length}`);
block.transactions.forEach((tx: any, index: number) => {
if (tx.transaction?.signatures?.[0]) {
console.log(`\nTransaction ${index + 1}:`);
console.log(` Signature: ${tx.transaction.signatures[0]}`);
if (tx.meta?.err) {
console.log(` Status: Failed`);
console.log(` Error: ${JSON.stringify(tx.meta.err)}`);
} else {
console.log(` Status: Success`);
}
if (tx.meta) {
console.log(` Fee: ${tx.meta.fee} lamports`);
console.log(` Compute Units: ${tx.meta.computeUnitsConsumed || 'N/A'}`);
}
}
});
}
if (block.rewards?.length > 0) {
console.log('\n=== Block Rewards ===');
block.rewards.forEach((reward: any) => {
console.log(` Account: ${reward.pubkey}`);
console.log(` Lamports: ${reward.lamports}`);
console.log(` Post Balance: ${reward.postBalance}`);
console.log(` Reward Type: ${reward.rewardType}`);
if (reward.commission !== undefined) {
console.log(` Commission: ${reward.commission}`);
}
console.log(' ---');
});
}
console.log('\n' + '='.repeat(50) + '\n');
}
}
// Slot monitoring implementation
async function monitorSlots() {
const manager = new GrpcStreamManager(
"your-grpc-url:2053",
"your-x-token",
handleSlotUpdate
);
const subscribeRequest: SubscribeRequest = {
slots: {
slotSubscribe: {}
},
accounts: {},
accountsDataSlice: [],
blocks: {},
transactions: {},
blocksMeta: {},
entry: {},
transactionsStatus: {},
commitment: CommitmentLevel.CONFIRMED,
};
console.log('Starting slot monitoring...');
await manager.connect(subscribeRequest);
}
function handleSlotUpdate(data: any): void {
if (data?.slot) {
const slotInfo = data.slot;
console.log('\n=== Slot Update ===');
console.log(`Slot: ${slotInfo.slot}`);
if (slotInfo.parent !== undefined) {
console.log(`Parent Slot: ${slotInfo.parent}`);
}
if (slotInfo.status) {
console.log('Status:');
if (slotInfo.status.confirmed !== undefined) {
console.log(` Confirmed: ${slotInfo.status.confirmed}`);
}
if (slotInfo.status.processed !== undefined) {
console.log(` Processed: ${slotInfo.status.processed}`);
}
if (slotInfo.status.finalized !== undefined) {
console.log(` Finalized: ${slotInfo.status.finalized}`);
}
}
if (slotInfo.timestamp) {
console.log(`Timestamp: ${new Date(slotInfo.timestamp).toISOString()}`);
}
console.log('\n' + '='.repeat(50) + '\n');
}
}
// Choose which monitoring to start
monitorBlocks().catch(console.error);
// monitorSlots().catch(console.error);Subscription Options
1. Monitor All Slots
const subscribeRequest: SubscribeRequest = {
slots: {
filterByCommitment: true,
},
commitment: CommitmentLevel.CONFIRMED,
};2. Monitor Blocks with Account Filtering
const subscribeRequest: SubscribeRequest = {
blocks: {
accountInclude: ["TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"],
includeTransactions: true,
includeAccounts: true,
},
commitment: CommitmentLevel.CONFIRMED,
};3. Monitor Block Metadata Only
const subscribeRequest: SubscribeRequest = {
blocksMeta: {
blockMetadata: {}
},
commitment: CommitmentLevel.CONFIRMED,
};Data Structures
Slot Update:
Slot number
Parent slot
Commitment status
Block Update:
Slot number
Blockhash
Parent information
Transaction count
Account updates
Block entries
Rewards
Timestamp
Block height
Block Metadata:
Basic block information
Transaction count
Entry count
Parent information
Rust Implementation
use {
anyhow::Result, futures::{sink::SinkExt, stream::StreamExt}, hex, log::error, solana_sdk::pubkey::Pubkey, std::{collections::HashMap, sync::Arc, time::Duration}, tokio::sync::Mutex, tonic::{metadata::errors::InvalidMetadataValue, transport::Endpoint}, tonic_health::pb::health_client::HealthClient, yellowstone_grpc_client::{GeyserGrpcClient, InterceptorXToken}, yellowstone_grpc_proto::{
geyser::{
geyser_client::GeyserClient, subscribe_update::UpdateOneof, SubscribeRequest, SubscribeRequestFilterBlocks, SubscribeRequestFilterSlots, SubscribeUpdateBlock, SubscribeUpdateSlot, CommitmentLevel
},
prelude::SubscribeRequestPing,
}
};
/// Manager for handling gRPC stream connections and updates
struct GrpcStreamManager {
client: GeyserGrpcClient<InterceptorXToken>,
is_connected: bool,
reconnect_attempts: u32,
max_reconnect_attempts: u32,
reconnect_interval: Duration,
}
impl GrpcStreamManager {
/// Creates a new GrpcStreamManager instance
async fn new(endpoint: &str, x_token: &str) -> Result<Arc<Mutex<Self>>> {
let interceptor = InterceptorXToken {
x_token: Some(x_token.parse().map_err(|e: InvalidMetadataValue| anyhow::Error::from(e))?),
x_request_snapshot: true,
};
let channel = Endpoint::from_shared(endpoint.to_string())?
.connect_timeout(Duration::from_secs(10))
.timeout(Duration::from_secs(10))
.connect()
.await
.map_err(|e| anyhow::Error::from(e))?;
let client = GeyserGrpcClient::new(
HealthClient::with_interceptor(channel.clone(), interceptor.clone()),
GeyserClient::with_interceptor(channel, interceptor),
);
Ok(Arc::new(Mutex::new(Self {
client,
is_connected: false,
reconnect_attempts: 0,
max_reconnect_attempts: 10,
reconnect_interval: Duration::from_secs(5),
})))
}
/// Handles block update messages from the gRPC stream
fn handle_block_update(&self, block: &SubscribeUpdateBlock) {
println!("\n=== Block Details ===");
println!("Slot: {}", block.slot);
println!("Parent Slot: {}", block.parent_slot);
println!("Blockhash: {}", hex::encode(&block.blockhash));
println!("Previous Blockhash: {}", hex::encode(&block.parent_blockhash));
if !block.transactions.is_empty() {
println!("\n=== Block Transactions ===");
println!("Transaction Count: {}", block.transactions.len());
for (index, tx) in block.transactions.iter().enumerate() {
if let Some(transaction) = &tx.transaction {
println!("\nTransaction {}:", index + 1);
println!(" Signature: {}", hex::encode(&transaction.signatures[0]));
if let Some(meta) = &tx.meta {
println!(" Status: {}", if meta.err.is_none() { "Success" } else { "Failed" });
if let Some(err) = &meta.err {
println!(" Error: {:?}", err);
}
println!(" Fee: {} lamports", meta.fee);
println!(" Compute Units: {:?}", meta.compute_units_consumed);
}
}
}
}
if let Some(rewards) = &block.rewards {
if !rewards.rewards.is_empty() {
println!("\n=== Block Rewards ===");
for reward in &rewards.rewards {
println!(" Account: {}", hex::encode(&reward.pubkey));
println!(" Lamports: {}", reward.lamports);
println!(" Post Balance: {}", reward.post_balance);
println!(" Reward Type: {}", reward.reward_type);
println!(" Commission: {}", reward.commission);
println!(" ---");
}
}
}
println!("\n{}\n", "=".repeat(50));
}
/// Handles slot update messages from the gRPC stream
fn handle_slot_update(&self, slot: &SubscribeUpdateSlot) {
println!("\n=== Slot Update ===");
println!("Slot: {}", slot.slot);
if let Some(parent) = slot.parent {
println!("Parent Slot: {}", parent);
}
println!("Status: {}", slot.status);
println!("\n{}\n", "=".repeat(50));
}
/// Establishes connection and handles the subscription stream
async fn connect(&mut self, request: SubscribeRequest) -> Result<()> {
let request = request.clone();
let (mut subscribe_tx, mut stream) = self.client.subscribe_with_request(Some(request.clone())).await?;
self.is_connected = true;
self.reconnect_attempts = 0;
while let Some(message) = stream.next().await {
match message {
Ok(msg) => {
match msg.update_oneof {
Some(UpdateOneof::Block(block)) => {
self.handle_block_update(&block);
}
Some(UpdateOneof::Slot(slot)) => {
self.handle_slot_update(&slot);
}
Some(UpdateOneof::Ping(_)) => {
subscribe_tx
.send(SubscribeRequest {
ping: Some(SubscribeRequestPing { id: 1 }),
..Default::default()
})
.await?;
}
Some(UpdateOneof::Pong(_)) => {} // Ignore pong responses
_ => {
println!("Other update received: {:?}", msg);
}
}
}
Err(err) => {
error!("Error: {:?}", err);
self.is_connected = false;
Box::pin(self.reconnect(request.clone())).await?;
break;
}
}
}
Ok(())
}
/// Attempts to reconnect when the connection is lost
async fn reconnect(&mut self, request: SubscribeRequest) -> Result<()> {
if self.reconnect_attempts >= self.max_reconnect_attempts {
println!("Max reconnection attempts reached");
return Ok(());
}
self.reconnect_attempts += 1;
println!("Reconnecting... Attempt {}", self.reconnect_attempts);
let backoff = self.reconnect_interval * std::cmp::min(self.reconnect_attempts, 5);
tokio::time::sleep(backoff).await;
Box::pin(self.connect(request)).await
}
}
#[tokio::main]
async fn main() -> Result<()> {
// Initialize gRPC stream manager
let manager = GrpcStreamManager::new(
"your-grpc-url:2053",
"your-x-token",
).await?;
let mut manager_lock = manager.lock().await;
// Create subscription request for blocks and slots
let request = SubscribeRequest {
blocks: HashMap::from_iter(vec![(
"blocks".to_string(),
SubscribeRequestFilterBlocks {
account_include: vec![
"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA".to_string(), // Token Program
"11111111111111111111111111111111".to_string(), // System Program
"So11111111111111111111111111111111111111112".to_string(), // Wrapped SOL
],
include_transactions: Some(true),
include_accounts: Some(true),
include_entries: Some(false),
},
)]),
slots: HashMap::from_iter(vec![(
"slots".to_string(),
SubscribeRequestFilterSlots {
filter_by_commitment: Some(true),
},
)]),
commitment: Some(CommitmentLevel::Confirmed as i32),
..Default::default()
};
println!("Starting block and slot monitoring...");
println!("Monitoring blocks for Token Program, System Program, and Wrapped SOL activities...");
// Start the subscription
let result = manager_lock.connect(request).await;
if let Err(e) = &result {
println!("Subscription error: {:?}", e);
}
result?;
Ok(())
}Go Implementation
package main
import (
"context"
"crypto/tls"
"fmt"
"log"
"strings"
"sync"
"time"
"github.com/mr-tron/base58"
pb "github.com/rpcpool/yellowstone-grpc/examples/golang/proto"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/metadata"
)
type GrpcStreamManager struct {
mu sync.Mutex
conn *grpc.ClientConn
client pb.GeyserClient
stream pb.Geyser_SubscribeClient
isConnected bool
reconnectAttempts int
maxReconnectAttempts int
reconnectInterval time.Duration
dataHandler func(*pb.SubscribeUpdate)
xToken string
}
func NewGrpcStreamManager(endpoint string, xToken string, dataHandler func(*pb.SubscribeUpdate)) (*GrpcStreamManager, error) {
// Create gRPC connection with interceptor for x-token
ctx := metadata.NewOutgoingContext(
context.Background(),
metadata.New(map[string]string{"x-token": xToken}),
)
// Configure TLS
config := &tls.Config{
InsecureSkipVerify: true,
}
conn, err := grpc.DialContext(ctx, endpoint,
grpc.WithTransportCredentials(credentials.NewTLS(config)),
grpc.WithInitialWindowSize(1<<30),
grpc.WithInitialConnWindowSize(1<<30),
grpc.WithDefaultCallOptions(
grpc.MaxCallSendMsgSize(64*1024*1024),
grpc.MaxCallRecvMsgSize(64*1024*1024),
),
)
if err != nil {
return nil, fmt.Errorf("failed to connect: %v", err)
}
return &GrpcStreamManager{
conn: conn,
client: pb.NewGeyserClient(conn),
isConnected: false,
reconnectAttempts: 0,
maxReconnectAttempts: 10,
reconnectInterval: 5 * time.Second,
dataHandler: dataHandler,
xToken: xToken,
}, nil
}
func (m *GrpcStreamManager) Connect(ctx context.Context, req *pb.SubscribeRequest) error {
m.mu.Lock()
defer m.mu.Unlock()
log.Println("Attempting to connect...")
// Add x-token to context
ctx = metadata.NewOutgoingContext(
ctx,
metadata.New(map[string]string{"x-token": m.xToken}),
)
stream, err := m.client.Subscribe(ctx)
if err != nil {
log.Printf("Failed to subscribe: %v", err)
return m.reconnect(ctx, req)
}
if err := stream.Send(req); err != nil {
log.Printf("Failed to send request: %v", err)
return m.reconnect(ctx, req)
}
m.stream = stream
m.isConnected = true
m.reconnectAttempts = 0
log.Println("Connection established")
// Start ping goroutine
go func() {
ticker := time.NewTicker(30 * time.Second)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
if !m.isConnected {
return
}
pingReq := &pb.SubscribeRequest{
Ping: &pb.SubscribeRequestPing{Id: 1},
}
if err := m.stream.Send(pingReq); err != nil {
log.Printf("Ping failed: %v", err)
m.handleDisconnect(ctx, req)
return
}
}
}
}()
// Process updates
go func() {
for {
update, err := m.stream.Recv()
if err != nil {
log.Printf("Stream error: %v", err)
m.handleDisconnect(ctx, req)
return
}
m.dataHandler(update)
}
}()
return nil
}
func (m *GrpcStreamManager) reconnect(ctx context.Context, req *pb.SubscribeRequest) error {
if m.reconnectAttempts >= m.maxReconnectAttempts {
return fmt.Errorf("max reconnection attempts reached")
}
m.reconnectAttempts++
log.Printf("Reconnecting... Attempt %d", m.reconnectAttempts)
backoff := m.reconnectInterval * time.Duration(min(m.reconnectAttempts, 5))
time.Sleep(backoff)
return m.Connect(ctx, req)
}
func (m *GrpcStreamManager) handleDisconnect(ctx context.Context, req *pb.SubscribeRequest) {
m.mu.Lock()
defer m.mu.Unlock()
if !m.isConnected {
return
}
m.isConnected = false
if err := m.reconnect(ctx, req); err != nil {
log.Printf("Failed to reconnect: %v", err)
}
}
func (m *GrpcStreamManager) Close() error {
m.mu.Lock()
defer m.mu.Unlock()
m.isConnected = false
if m.conn != nil {
return m.conn.Close()
}
return nil
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
func handleAccountUpdate(update *pb.SubscribeUpdate) {
switch u := update.GetUpdateOneof().(type) {
case *pb.SubscribeUpdate_Block:
handleBlockUpdate(u.Block)
case *pb.SubscribeUpdate_Slot:
handleSlotUpdate(u.Slot)
case *pb.SubscribeUpdate_Transaction:
handleTransactionUpdate(u.Transaction)
}
}
func handleBlockUpdate(block *pb.SubscribeUpdateBlock) {
log.Printf("\n=== Block Details ===\n")
log.Printf("Slot: %d\n", block.GetSlot())
log.Printf("Parent Slot: %d\n", block.GetParentSlot())
log.Printf("Blockhash: %s\n", block.GetBlockhash())
log.Printf("Previous Blockhash: %s\n", block.GetParentBlockhash())
if txs := block.GetTransactions(); len(txs) > 0 {
log.Printf("\n=== Block Transactions ===\n")
log.Printf("Transaction Count: %d\n", len(txs))
for i, tx := range txs {
if txInfo := tx.GetTransaction(); txInfo != nil {
log.Printf("\nTransaction %d:\n", i+1)
if signatures := txInfo.GetSignatures(); len(signatures) > 0 {
log.Printf(" Signature: %s\n", base58.Encode(signatures[0]))
}
if meta := tx.GetMeta(); meta != nil {
log.Printf(" Status: %v\n", meta.GetErr() == nil)
log.Printf(" Fee: %d lamports\n", meta.GetFee())
}
}
}
}
if rewards := block.GetRewards(); rewards != nil {
if rewardList := rewards.GetRewards(); len(rewardList) > 0 {
log.Printf("\n=== Block Rewards ===\n")
for _, reward := range rewardList {
pubkey := []byte(reward.GetPubkey())
log.Printf(" Account: %s\n", base58.Encode(pubkey))
log.Printf(" Lamports: %d\n", reward.GetLamports())
log.Printf(" Post Balance: %d\n", reward.GetPostBalance())
log.Printf(" Reward Type: %d\n", reward.GetRewardType())
log.Printf(" Commission: %d\n", reward.GetCommission())
log.Printf(" ---\n")
}
}
}
log.Printf("\n%s\n", strings.Repeat("=", 50))
}
func handleSlotUpdate(slot *pb.SubscribeUpdateSlot) {
log.Printf("\n=== Slot Update ===\n")
log.Printf("Slot: %d\n", slot.GetSlot())
if parent := slot.GetParent(); parent > 0 {
log.Printf("Parent Slot: %d\n", parent)
}
log.Printf("Status: %v\n", slot.GetStatus())
if deadError := slot.GetDeadError(); deadError != "" {
log.Printf("Dead Error: %s\n", deadError)
}
log.Printf("\n%s\n", strings.Repeat("=", 50))
}
func handleTransactionUpdate(tx *pb.SubscribeUpdateTransaction) {
log.Printf("Transaction Update:\n")
log.Printf(" Slot: %d\n", tx.GetSlot())
txInfo := tx.GetTransaction()
if txInfo != nil {
// Print signature if available
if len(txInfo.GetSignature()) > 0 {
log.Printf(" Signature: %s\n", base58.Encode(txInfo.GetSignature()))
}
// Print if it's a vote transaction
log.Printf(" Is Vote: %v\n", txInfo.GetIsVote())
// Print transaction index
log.Printf(" Transaction Index: %d\n", txInfo.GetIndex())
// Print transaction details
if tx := txInfo.GetTransaction(); tx != nil {
if msg := tx.GetMessage(); msg != nil {
if accounts := msg.GetAccountKeys(); len(accounts) > 0 {
log.Printf(" Account Keys:\n")
for _, acc := range accounts {
if len(acc) > 0 {
log.Printf(" - %s\n", base58.Encode(acc))
}
}
}
}
}
// Print status and metadata
if meta := txInfo.GetMeta(); meta != nil {
log.Printf(" Status: %v\n", meta.GetErr() == nil)
log.Printf(" Fee: %d\n", meta.GetFee())
// Print log messages if any
if len(meta.GetLogMessages()) > 0 {
log.Printf(" Log Messages:\n")
for _, msg := range meta.GetLogMessages() {
log.Printf(" - %s\n", msg)
}
}
}
}
}
func boolPtr(b bool) *bool {
return &b
}
func main() {
ctx := context.Background()
// Create manager with data handler and x-token
manager, err := NewGrpcStreamManager(
"your-grpc-url:2053",
"your-x-token",
handleAccountUpdate,
)
if err != nil {
log.Fatal(err)
}
defer manager.Close()
// Create subscription request for blocks and slots
blocks := make(map[string]*pb.SubscribeRequestFilterBlocks)
blocks["blocks"] = &pb.SubscribeRequestFilterBlocks{
AccountInclude: []string{
"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA", // Token Program
"11111111111111111111111111111111", // System Program
"So11111111111111111111111111111111111111112", // Wrapped SOL
},
IncludeTransactions: boolPtr(true),
IncludeAccounts: boolPtr(true),
IncludeEntries: boolPtr(false),
}
slots := make(map[string]*pb.SubscribeRequestFilterSlots)
slots["slots"] = &pb.SubscribeRequestFilterSlots{
FilterByCommitment: boolPtr(true),
}
commitment := pb.CommitmentLevel_CONFIRMED
req := &pb.SubscribeRequest{
Blocks: blocks,
Slots: slots,
Commitment: &commitment,
}
log.Println("Starting block and slot monitoring...")
log.Println("Monitoring blocks for Token Program, System Program, and Wrapped SOL activities...")
// Connect and handle updates
if err := manager.Connect(ctx, req); err != nil {
log.Fatal(err)
}
// Keep the main goroutine running
select {}
}Last updated
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