trc20开发 golang

TRC20 是什么？ TRC20是一种基于以太坊区块链平台的通用代币标准。它与ERC20（Ethereum Request for Comments 20）标准类似，但在Tron区块链上运行。作为智能合约的一部分，TRC20代币可以实现代币发行、转账、余额查询等功能。本文将介绍如何使用Golang开发TRC20合约。 准备工作 在开始之前，我们需要安装Golang开发环境和相应的依赖。首先，确保你已经安装了最新版本的Golang。接下来，你需要安装Solidity编译器solc和Tron区块链客户端geth。 编写TRC20合约 首先，我们要创建一个名为TRC20.sol的Solidity文件，并在其中定义TRC20合约的规范。以下是一个简单的TRC20合约示例： ``` pragma solidity ^0.6.0; contract TRC20 { string public name; string public symbol; uint8 public decimals; uint256 public totalSupply; mapping(address => uint256) balances; mapping(address => mapping(address => uint256)) allowances; event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _totalSupply) public { name = _name; symbol = _symbol; decimals = _decimals; totalSupply = _totalSupply; balances[msg.sender] = _totalSupply; } function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0), "Invalid address"); require(_value <= balances[msg.sender], "Insufficient balance"); balances[msg.sender] -= _value; balances[_to] += _value; emit Transfer(msg.sender, _to, _value); return true; } function approve(address _spender, uint256 _value) public returns (bool) { allowances[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0), "Invalid address"); require(_value <= balances[_from], "Insufficient balance"); require(_value <= allowances[_from][msg.sender], "Insufficient allowance"); balances[_from] -= _value; balances[_to] += _value; allowances[_from][msg.sender] -= _value; emit Transfer(_from, _to, _value); return true; } function allowance(address _owner, address _spender) public view returns (uint256) { return allowances[_owner][_spender]; } } ``` 在合约中，我们定义了代币的名称、符号、小数点位数和总供应量等属性。还定义了相应的函数来实现转账、余额查询和授权等功能。 编译和部署合约 完成合约代码编写后，我们需要将其编译成字节码，并部署到Tron区块链上。首先，在命令行终端中使用solc编译器进行编译： ``` solc --bin --abi TRC20.sol -o build ``` 编译完成后，会在build目录下生成TRC20.abi和TRC20.bin文件。接下来，使用geth客户端连接到Tron网络，并部署合约： ```golang package main import ( "context" "encoding/hex" "log" "math/big" "github.com/ethereum/go-ethereum" "github.com/ethereum/go-ethereum/accounts/abi" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/ethclient" "github.com/tronprotocol/go-tron" ) func main() { client, err := ethclient.Dial("https://api.trongrid.io") if err != nil { log.Fatalf("Failed to connect to the Ethereum client: %v", err) } privateKey, err := hex.DecodeString("YOUR_PRIVATE_KEY") if err != nil { log.Fatalf("Failed to decode private key: %v", err) } publicKey := privateKey.Public() publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey) if !ok { log.Fatalf("Failed to get ECDSA public key from private key") } fromAddress := crypto.PubkeyToAddress(*publicKeyECDSA) nonce, err := client.PendingNonceAt(context.Background(), fromAddress) if err != nil { log.Fatalf("Failed to retrieve account nonce: %v", err) } gasLimit := uint64(3000000) gasPrice, err := client.SuggestGasPrice(context.Background()) if err != nil { log.Fatalf("Failed to retrieve suggested gas price: %v", err) } auth, err := bind.NewKeyedTransactorWithChainID(privateKey, big.NewInt(1)) if err != nil { log.Fatalf("Failed to create authorized transactor: %v", err) } address, transaction, _, err := deployContract(auth, client, gasLimit, gasPrice, nonce) if err != nil { log.Fatalf("Failed to deploy contract: %v", err) } log.Printf("Contract address: %s", address.Hex()) log.Printf("Transaction hash: %s", transaction.Hash().Hex()) } func deployContract(auth *bind.TransactOpts, client *ethclient.Client, gasLimit uint64, gasPrice *big.Int, nonce uint64) (common.Address, *types.Transaction, *TRC20, error) { parsedABI, err := abi.JSON(strings.NewReader(string(TRC20ABI))) if err != nil { return common.Address{}, nil, nil, fmt.Errorf("Failed to parse TRC20 ABI: %v", err) } dataBytecode, err := hex.DecodeString(string(TRC20BIN)) if err != nil { return common.Address{}, nil, nil, fmt.Errorf("Failed to decode bytecode: %v", err) } auth.Nonce = big.NewInt(int64(nonce)) auth.Value = big.NewInt(0) auth.GasPrice = gasPrice auth.GasLimit = gasLimit contractAddress, tx, contract, err := deploy.DeployTRC20Contract(auth, client, parsedABI, dataBytecode) if err != nil { return common.Address{}, nil, nil, fmt.Errorf("Failed to deploy TRC20 contract: %v", err) } return contractAddress, tx, contract, nil } ``` 在以上代码中，我们使用ethclient.Dial建立到Tron网络的连接，并设置私钥、账户地址、合约的部署参数。然后，通过调用deployContract函数部署合约。 使用TRC20合约 在成功部署合约后，我们可以通过调用合约的函数来使用TRC20代币。以下是一些常用的函数示例： ```golang package main import ( "fmt" "log" "math/big" "github.com/ethereum/go-ethereum" "github.com/ethereum/go-ethereum/accounts/abi" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/ethclient" ) func main() { client, err := ethclient.Dial("https://api.trongrid.io") if err != nil { log.Fatalf("Failed to connect to the Ethereum client: %v", err) } address := common.HexToAddress("CONTRACT_ADDRESS") token, err := NewTRC20(address, client) if err != nil { log.Fatalf("Failed to instantiate a Token contract: %v", err) } name, err := token.Name(nil) if err != nil { log.Fatalf("Failed to retrieve token name: %v", err) } symbol, err := token.Symbol(nil) if err != nil { log.Fatalf("Failed to retrieve token symbol: %v", err) } decimals, err := token.Decimals(nil) if err != nil { log.Fatalf("Failed to retrieve token decimals: %v", err) } totalSupply, err := token.TotalSupply(nil) if err != nil { log.Fatalf("Failed to retrieve token total supply: %v", err) } balance, err := token.BalanceOf(nil, common.HexToAddress("YOUR_ADDRESS")) if err != nil { log.Fatalf("Failed to retrieve token balance: %v", err) } allowance, err := token.Allowance(nil, common.HexToAddress("OWNER_ADDRESS"), common.HexToAddress("SPENDER_ADDRESS"))