🔗 TronLib - Go SDK for TRON Blockchain

A comprehensive, production-ready Go SDK for interacting with the TRON blockchain. TronLib provides high-level abstractions for common operations while maintaining flexibility for advanced use cases.

✨ Features

• 🚀 Simple & Intuitive - High-level APIs that make blockchain interaction straightforward
• 🔐 Secure - Built-in support for private keys and HD wallets
• 💰 TRC20 Ready - First-class support for TRC20 tokens with decimal conversion
• 📦 Smart Contracts - Deploy and interact with smart contracts effortlessly
• 🎯 Event Decoding - Decode transaction logs with built-in TRC20 event support
• ⚡ Performance - Connection pooling and efficient gRPC communication
• 🔍 Simulation - Test transactions before broadcasting to the network
• 📊 Resource Management - Handle bandwidth and energy efficiently

🏁 Quick Start

Installation

go get github.com/kslamph/tronlib

Simple TRX Transfer

package main

import (
    "context"
    "fmt"
    "log"

    "github.com/kslamph/tronlib/pkg/client"
    "github.com/kslamph/tronlib/pkg/signer"
    "github.com/kslamph/tronlib/pkg/types"
)

func main() {
    // Connect to TRON node
    cli, err := client.NewClient("grpc://grpc.nile.trongrid.io:50051")
    if err != nil {
        log.Fatal(err)
    }
    defer cli.Close()

    // Create signer from private key
    signer, err := signer.NewPrivateKeySigner("your-private-key-hex")
    if err != nil {
        log.Fatal(err)
    }

    // Define addresses
    from := signer.Address()
    to, _ := types.NewAddress("TBkfmcE7pM8cwxEhATtkMFwAf1FeQcwY9x")

    // Transfer 1 TRX (1,000,000 SUN)
    tx, err := cli.Account().TransferTRX(context.Background(), from, to, 1_000_000)
    if err != nil {
        log.Fatal(err)
    }

    // Sign and broadcast
    result, err := cli.SignAndBroadcast(context.Background(), tx, client.DefaultBroadcastOptions(), signer)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Printf("Transaction ID: %s\n", result.TxID)
    fmt.Printf("Success: %v\n", result.Success)
}

TRC20 Token Transfer

package main

import (
    "context"
    "log"

    "github.com/shopspring/decimal"
    "github.com/kslamph/tronlib/pkg/client"
    "github.com/kslamph/tronlib/pkg/signer"
    "github.com/kslamph/tronlib/pkg/trc20"
    "github.com/kslamph/tronlib/pkg/types"
)

func main() {
    cli, _ := client.NewClient("grpc://grpc.nile.trongrid.io:50051")
    defer cli.Close()

    signer, _ := signer.NewPrivateKeySigner("your-private-key-hex")
    
    // USDT contract address on mainnet
    token, _ := types.NewAddress("TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t")
    to, _ := types.NewAddress("TBkfmcE7pM8cwxEhATtkMFwAf1FeQcwY9x")

    // Create TRC20 manager
    trc20Mgr := cli.TRC20(token)
    if trc20Mgr == nil {
        log.Fatal("Failed to create TRC20 manager")
    }

    // Transfer 10 USDT
    amount := decimal.NewFromInt(10)
    _, tx, err := trc20Mgr.Transfer(context.Background(), signer.Address(), to, amount)
    if err != nil {
        log.Fatal(err)
    }

    // Sign and broadcast
    result, err := cli.SignAndBroadcast(context.Background(), tx, client.DefaultBroadcastOptions(), signer)
    if err != nil {
        log.Fatal(err)
    }

    log.Printf("TRC20 transfer completed: %s", result.TxID)
}

📚 Documentation

To get the most out of TronLib, follow this learning path:

🚀 Getting Started

• Quick Start Guide - Step-by-step guide to basic operations

🏗️ Core Concepts

• Architecture Overview - Understanding the library structure and design patterns

📦 Package References

Detailed documentation for each package:

• Types - Address handling and fundamental types
• TRC20 - TRC20 token operations and decimal handling
• Smart Contracts - Contract deployment and interaction
• Event Decoder - Transaction log decoding
• Utils - ABI encoding/decoding utilities

💡 Advanced Topics

• API Reference - Complete API documentation
• Complete Examples - Real-world usage examples
• Integration Tests - Comprehensive test suite

🏗️ Project Structure

tronlib/
├── 📁 pkg/                    # Core library packages
│   ├── 📁 client/            # gRPC client and connection management
│   ├── 📁 types/             # Fundamental types (Address, constants)
│   ├── 📁 signer/            # Private key and HD wallet management
│   ├── 📁 account/           # Account operations (balance, TRX transfers)
│   ├── 📁 trc20/             # TRC20 token operations
│   ├── 📁 smartcontract/     # Smart contract deployment and interaction
│   ├── 📁 eventdecoder/      # Event log decoding
│   ├── 📁 utils/             # ABI encoding/decoding utilities
│   ├── 📁 resources/         # Resource management (bandwidth, energy)
│   ├── 📁 voting/            # Voting operations
│   └── 📁 network/           # Network operations
├── 📁 example/               # Usage examples
├── 📁 cmd/                   # Command-line tools
├── 📁 integration_test/      # Integration tests
└── 📁 docs/                  # Documentation

🚀 Advanced Usage

Signing Operations

TronLib provides flexible options for signing transactions and messages.

Manual Transaction Signing and Broadcasting

If you prefer to sign transactions manually before broadcasting, or need to integrate with external signers (e.g., hardware wallets, cloud KMS), you can use the signer.SignTx function.

// Example for manual signing and broadcasting:
// 1. Create the transaction
// tx, err := cli.Account().TransferTRX(...)
// if err != nil {
//     log.Fatal(err)
// }
//
// 2. Sign the transaction using SignTx
// err = signer.SignTx(yourSigner, tx) // 'yourSigner' is an instance of signer.Signer
// if err != nil {
//     log.Fatal(err)
// }
//
// 3. Broadcast the signed transaction
// result, err := cli.Broadcast(context.Background(), tx)
// if err != nil {
//     log.Fatal(err)
// }
// fmt.Printf("Transaction ID: %s\n", result.TxID)

Message Signing (TIP-191 v2)

To sign arbitrary messages following the TRON Improvement Proposal 191 (TIP-191) v2 format, use the standalone signer.SignMessageV2 function.

// Sign an arbitrary message using the standalone SignMessageV2 function
// privateKey := "your-private-key-hex"
// pkSigner, err := signer.NewPrivateKeySigner(privateKey)
// if err != nil {
//     log.Fatal(err)
// }
//
// message := "Hello TronLib!"
// signature, err := signer.SignMessageV2(pkSigner, message)
// if err != nil {
//     log.Fatal(err)
// }
// fmt.Printf("Signed Message: %s\n", signature)

Transaction Simulation

Test transactions before broadcasting:

// Simulate before sending
simResult, err := cli.Simulate(context.Background(), tx)
if err != nil {
    log.Fatal(err)
}

fmt.Printf("Energy needed: %d\n", simResult.EnergyUsage)
fmt.Printf("Would succeed: %v\n", simResult.Success)

// Only broadcast if simulation succeeds
if simResult.Success {
    result, err := cli.SignAndBroadcast(context.Background(), tx, opts, signer)
    // ...
}

Smart Contract Interaction

// Create contract instance
contract, err := smartcontract.NewInstance(cli, contractAddr, abiJSON)
if err != nil {
    log.Fatal(err)
}

// Call contract method
tx, err := contract.Invoke(ctx, signer.Address(), 0, "setValue", uint64(42))
if err != nil {
    log.Fatal(err)
}

// Sign and broadcast
result, err := cli.SignAndBroadcast(ctx, tx, opts, signer)

Event Decoding

// Decode transaction logs
for _, log := range result.Logs {
    event, err := eventdecoder.DecodeLog(log.GetTopics(), log.GetData())
    if err != nil {
        continue
    }
    
    fmt.Printf("Event: %s\n", event.EventName)
    for _, param := range event.Parameters {
        fmt.Printf("  %s: %v\n", param.Name, param.Value)
    }
}

🔧 Configuration

Client Options

cli, err := client.NewClient("grpc://grpc.trongrid.io:50051",
    client.WithTimeout(30*time.Second),     // Default timeout
    client.WithPool(5, 10),                 // Connection pool: 5 initial, 10 max
)

Broadcast Options

opts := client.DefaultBroadcastOptions()
opts.FeeLimit = 100_000_000                // Set fee limit in SUN
opts.WaitForReceipt = true                 // Wait for transaction receipt
opts.WaitTimeout = 20 * time.Second       // Timeout for receipt
opts.PollInterval = 500 * time.Millisecond // Polling interval

🌐 Network Support

• Mainnet: grpc://grpc.trongrid.io:50051
• Nile Testnet: grpc://grpc.nile.trongrid.io:50051
• Local Node: grpc://127.0.0.1:50051

💡 Tip: Use testnet for development and testing. Get test TRX from the Nile Testnet Faucet.

🤝 Contributing

We welcome contributions! Please see our Contributing Guidelines for details.

1. Fork the repository
2. Create a feature branch
3. Add tests for your changes
4. Ensure all tests pass
5. Submit a pull request

📜 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Built on the foundation of TRON's gRPC API
• Uses Google Protocol Buffers for efficient communication

---

Made with ❤️ for the TRON community

For questions, issues, or feature requests, please open an issue on GitHub.