TRC-20: Token Standard on Tron


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The TRC-20 token standard, often hailed as the backbone of TRON’s token standard, is pivotal in the TRON blockchain ecosystem due to its robust features and widespread adoption. Its core attributes, such as interoperability with Ethereum’s ERC-20, high efficiency with low transaction fees, and flexible functionality for developers, make it a standout choice for building decentralised applications. TRC-20 facilitates cost-effective and rapid transactions, essential for scaling applications and frequent interactions within the blockchain. Its extensive use in DeFi platforms within the TRON ecosystem underscores its importance, enabling various financial services and fostering a dynamic and interconnected blockchain environment.

What is TRC-20?

TRC-20 is a technical standard used for smart contracts on the TRON blockchain for implementing tokens with the TRON Virtual Machine (TVM). This standard is fully compatible with Ethereum’s ERC-20 standard, allowing developers to easily migrate their tokens and applications from Ethereum to TRON.

Key Features of TRC-20

1. Interoperability

TRC-20 tokens can seamlessly interact with various decentralised applications (dApps) within the TRON ecosystem, promoting a fluid user experience.

2. Compatibility

The TRC-20 standard mirrors ERC-20, ensuring that developers familiar with Ethereum can quickly adapt and deploy on TRON.

3. High Throughput

TRON’s network is known for its high transaction throughput, making TRC-20 tokens capable of handling a large volume of transactions efficiently.

4. Low Fees

Transactions involving TRC-20 tokens benefit from TRON’s low transaction fees, making it a cost-effective choice for both developers and users.

TRC-20 Token Structure

The TRC-20 token standard specifies a set of rules and functions that a smart contract must implement. Here are the core functions defined by the TRC-20 standard:

  • totalSupply: Returns the total supply of the token.

  • balanceOf: Provides the account balance of the token owner.

  • transfer: Transfers a specified amount of tokens to a recipient.

  • transferFrom: Transfers tokens from a specified address.

  • approve: Allows a spender to withdraw tokens from the owner’s account multiple times, up to a specified amount.

  • allowance: Returns the amount of tokens that a spender is allowed to withdraw from the owner’s account.

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Here’s a simplified example of a TRC-20 token contract written in Solidity:


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					pragma solidity ^0.5.8;

contract TRC20Token {
    string public name = "Sample TRC20 Token";
    string public symbol = "ST20";
    uint8 public decimals = 18;
    uint256 public totalSupply = 1000000 * (10 ** uint256(decimals));
    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    constructor() public {
        balanceOf[msg.sender] = totalSupply;
    function transfer(address _to, uint256 _value) public returns (bool success) {
        require(_to != address(0));
        require(balanceOf[msg.sender] >= _value);
        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += _value;
        emit Transfer(msg.sender, _to, _value);
        return true;
    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_to != address(0));
        require(balanceOf[_from] >= _value);
        require(allowance[_from][msg.sender] >= _value);
        balanceOf[_from] -= _value;
        balanceOf[_to] += _value;
        allowance[_from][msg.sender] -= _value;
        emit Transfer(_from, _to, _value);
        return true;


Benefits of Using TRC-20 Tokens

1. Scalability

TRON’s architecture supports a high number of transactions per second (TPS), making TRC-20 tokens suitable for large-scale applications.

2. Developer-Friendly

With its Ethereum compatibility, developers find it easy to create and deploy TRC-20 tokens.

3. Cost Efficiency

Lower transaction fees on the TRON network enhance the practicality of using TRC-20 tokens for everyday transactions.

4.Ecosystem Support

TRC-20 tokens enjoy broad support within the TRON ecosystem, including wallets, exchanges, and dApps.

Use Cases of TRC-20 Tokens

TRC-20 tokens are used in various applications across the TRON ecosystem, including:

  • DeFi Platforms: TRC-20 tokens are widely used in decentralised finance applications for lending, borrowing, and staking.

  • Gaming: Many blockchain-based games utilise TRC-20 tokens for in-game assets and rewards.

  • Token Sales: Projects launching on TRON often use TRC-20 tokens for initial coin offerings (ICOs) and other fundraising mechanisms.

  • Digital Assets: TRC-20 tokens serve as digital representations of various assets, facilitating seamless transactions and ownership transfers.


The TRC-20 token standard plays a pivotal role in the TRON blockchain ecosystem, offering developers a reliable and efficient way to create and manage tokens. Smart contracts and their role in TRC-20 tokens are crucial, as they automate processes and ensure secure, transparent, and immutable transactions. These contracts define the rules and behaviours of TRC-20 tokens, managing issuance, transfer, and overall operations according to the protocol’s standards. This integration ensures seamless interaction with dApps and other smart contracts on the TRON network, fostering a versatile and cohesive blockchain ecosystem. With high throughput, low fees, and compatibility with Ethereum standards, TRC-20 continues to drive innovation and adoption within the decentralised landscape, making it essential for both developers and users to understand its workings.

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