TRC20-Contract-Template

TRC20

TRC20 is a technical standard used for smart contracts on the TRON blockchain for implementing tokens with the TRON Virtual Machine (TVM). It is fully compatible to ERC-20.

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Implementation Rules

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3 Optional Items

Token Name

string public constant name = “TRONEuropeRewardCoin”;

Token Abbreviation

string public constant symbol = “TERC”;

Token Precision

uint8 public constant decimals = 6;

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6 Required Items

totalSupply()

function totalSupply() returns (uint theTotalSupply);

This function returns the total supply of the token.

balanceOf()

function balanceOf(address _owner) returns (uint balance);

This function returns the token balance of the specific account.

transfer()

function transfer(address _to, uint _value) returns (bool success);

This function is used to transfer an amount of tokens from the smart contract to a specific address.

approve()

function approve(address _spender, uint _value) returns (bool success);

This function is used to authorize the third party (like a DAPP smart contract) to transfer token from the token owner’s account.

transferFrom()

function transferFrom(address _from, address _to, uint _value) returns (bool success);

This function is used to allow the third party to transfer token from an owner account to a receiver account. The owner account must be approved to be called by the third party.

allowance()

function allowance(address _owner, address _spender) returns (uint remaining);

This function is used to query the remaining amount of tokens the third party can transfer.

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2 Required Event Functions

Transfer

event Transfer(address indexed _from, address indexed _to, uint256 _value)

When token is successfully transferred, it has to trigger Transfer Event.

Approval

event Approval(address indexed _owner, address indexed _spender, uint256 _value)

When approval() is successfully called, it has to trigger Approval Event.