How to Monitor TRON Blockchain Transactions (HTTP Version Without SDK)

Tracking blockchain transactions is essential for verifying user deposits and withdrawals. This guide explains how to monitor TRON blocks programmatically using HTTP APIs—without relying on SDKs.

Core Workflow

1. Fetch the latest block via getnowblock API
2. Iterate through subsequent blocks using getblockbynum
3. Analyze transactions and match them against user addresses

var blockNumber = 0; // Tracks current block height
while (true) {
    var stopWatch = new Stopwatch();
    stopWatch.Start();
    try {
        string responseString;
        if (blockNumber == 0) {
            const string url = "https://api.trongrid.io/wallet/getnowblock";
            responseString = HttpClientHelper.Get(url);
        } else {
            const string url = "https://api.trongrid.io/wallet/getblockbynum";
            var requestBody = new { num = blockNumber + 1 };
            responseString = HttpClientHelper.Post(url, JsonConvert.SerializeObject(requestBody), Encoding.UTF8);
        }
        var responseObject = JsonConvert.DeserializeObject(responseString);
        if (responseObject?.blockID == null || responseObject.block_header == null) 
            throw new ThreadSleepException();
        
        blockNumber = (int)responseObject.block_header.raw_data.number;
        var blockHash = (string)responseObject.blockID;
        Console.WriteLine($"Block #{blockNumber}\tHash: {blockHash}");

        if (responseObject.transactions != null) {
            foreach (var transaction in responseObject.transactions) {
                // Transaction validation and processing logic
            }
        }
    } catch (Exception ex) {
        // Error handling
    }
    Thread.Sleep(2500); // Syncs with TRON's 3-second block time
}

Key Components

1. Transaction Types Handled

• TRX Transfers (TransferContract)
• TRC-20 Tokens (e.g., USDT via TriggerSmartContract)
• Resource Delegation (DelegateResourceContract)

👉 Learn how TRON's smart contracts work

2. Redis Integration

Used to compare transactions against registered user addresses:

public class RedisProvider {
    private readonly IDatabase _database = ConnectionMultiplexer.Connect("127.0.0.1:6379").GetDatabase();
    public bool KeyExists(string key) => _database.KeyExists(key);
}

3. HTTP Client Setup

Includes TRON Grid API authentication:

req.Headers.Set("TRON-PRO-API-KEY", "your-api-key");

Best Practices

1. Block Synchronization

   • Checks every 2.5 seconds to account for network delays

2. Error Handling

   • Retries failed requests with exponential backoff

3. Scalability

   • Processes 100+ transactions per block efficiently

👉 Explore blockchain monitoring tools

FAQ

Q1: Can I monitor multiple TRC-20 tokens?
A1: Yes! Modify the contract address in TriggerSmartContract.

Q2: Why use Redis?
A2: Fast read/writes for address matching—alternatives like PostgreSQL work too.

Q3: How to handle API rate limits?
A3: Implement request queuing or use premium TRON Grid plans.

Q4: Is historical data available?
A4: Yes, via getblockbynum with past block numbers.

Dependencies

Install-Package Newtonsoft.Json
Install-Package StackExchange.Redis
Install-Package TronNet.Wallet -Version 1.0.1

By following this approach, you’ll build a reliable TRON transaction monitor for real-time deposit/withdrawal tracking.