BSC测试网部署SafeMoonDemo合约遇execution reverted错误求助

部署SafeMoonDemo合约到BSC测试网时，Gas估算触发以下错误，交易大概率执行失败：

内部JSON-RPC错误。{"code": -32000, "message": "execution reverted"}

错误截图：

合约代码如下：

contract SafemoonDemo is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;

    mapping (address => bool) private _isExcludedFromFee;

    mapping (address => bool) private _isExcluded;
    address[] private _excluded;
   
    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal = 1000 * 10**6 * 10**9;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;

    string private _name = "SafeMoonDemo";
    string private _symbol = "SFD";
    uint8 private _decimals = 9;
    
    uint256 public _taxFee = 5;
    uint256 private _previousTaxFee = _taxFee;
    
    uint256 public _liquidityFee = 5;
    uint256 private _previousLiquidityFee = _liquidityFee;

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    
    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    
    uint256 public _maxTxAmount = 5000 * 10**6 * 10**9;
    uint256 private numTokensSellToAddToLiquidity = 5000 * 10**6 * 10**9;
    
    event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );
    
    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }
    
    constructor () public {
        _rOwned[_msgSender()] = _rTotal;
        
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E);
         // Create a uniswap pair for this new token
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

        // set the rest of the contract variables
        uniswapV2Router = _uniswapV2Router;
        
        //exclude owner and this contract from fee
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
}

问题原因及解决方法 #

• 缺失核心函数实现：代码中调用了tokenFromReflection、_transfer、_approve等关键函数，但未提供具体实现，合约部署时执行到相关逻辑会直接触发revert。必须补充这些函数的完整代码才能正常部署。
• Router地址错误：当前使用的0x10ED43C718714eb63d5aA57B78B54704E256024E是BSC主网的PancakeSwap Router地址，BSC测试网对应的Router地址应为0xD99D1c33F9fC3444f8101754aBC46c52416550D1，替换后再尝试部署。
• immutable变量初始化顺序问题：Solidity中immutable变量需要在构造函数中按正确顺序赋值，确保uniswapV2Router先被赋值，再调用其factory()方法创建交易对。
• Gas Limit不足：部署带有Uniswap交互逻辑的合约需要更高的Gas，手动将Gas Limit调整至3000000左右，再尝试发送交易。

内容的提问来源于stack exchange，提问作者Nitesh Mehra