Question

我设法创建了一个注册的以太坊＆＃34;令牌＆＃34;主要使用＆＃34;如何＆＃34;来自Frontier网站。我打算继续执行众包合同，以筹集资金，用于筹集能够在世界上取得好成绩的筹款活动，但稍后会更多。令牌创建文本包含用于改进新令牌功能的建议：例如，您可以通过创建一个可以奖励谁找到当前区块的交易来奖励以太坊矿工：

mapping (uint => address) miningReward;
function claimMiningReward() {
if (miningReward[block.number] == 0) {
 coinBalanceOf[block.coinbase] += 1;
 miningReward[block.number] = block.coinbase;
  }
}

简单地将此代码粘贴到我的合同中会自然产生错误消息。

问：我需要调整，输入，更改哪些内容才能使用我的某个令牌奖励未成年人？对于每个开采的新区块。谢谢。

Answer 1

您可以将代码段复制并粘贴到token合约中。它看起来像这样：

contract token { 
    mapping (address => uint) public coinBalanceOf;
    event CoinTransfer(address sender, address receiver, uint amount);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function token(uint supply) {
        if (supply == 0) supply = 10000;
            coinBalanceOf[msg.sender] = supply;
    }

    /* Very simple trade function */
    function sendCoin(address receiver, uint amount) returns(bool sufficient) {
        if (coinBalanceOf[msg.sender] < amount) return false;
        coinBalanceOf[msg.sender] -= amount;
        coinBalanceOf[receiver] += amount;
        CoinTransfer(msg.sender, receiver, amount);
        return true;
    }

    mapping (uint => address) miningReward;

    /* Reward Ethereum block miner with a token */
    function claimMiningReward() {
        if (miningReward[block.number] == 0) {
            coinBalanceOf[block.coinbase] += 1;
            miningReward[block.number] = block.coinbase;
        }
    }
}

Answer 2

我不知道你是否想出了这个。其他任何有相同问题的人都会尝试以下代码段：

contract MyToken { 
    /* Public variables of the token */
    string public name;
    string public symbol;
    uint8 public decimals;

    /* This creates an array with all balances */
    mapping (address => uint256) public balanceOf;

    /* This generates a public event on the blockchain that will notify clients */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function MyToken(uint256 _supply, string _name, string _symbol, uint8 _decimals) {
        /* if supply not given then generate 1 million of the smallest unit of the token */
        if (_supply == 0) _supply = 1000000;

        /* Unless you add other functions these variables will never change */
        balanceOf[msg.sender] = _supply;
        name = _name;     
        symbol = _symbol;

        /* If you want a divisible token then add the amount of decimals the base unit has  */
        decimals = _decimals;
    }

    /* Send coins */
    function transfer(address _to, uint256 _value) {
        /* if the sender doenst have enough balance then stop */
        if (balanceOf[msg.sender] < _value) throw;
        if (balanceOf[_to] + _value < balanceOf[_to]) throw;

        /* Add and subtract new balances */
        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += _value;

        /* Notifiy anyone listening that this transfer took place */
        Transfer(msg.sender, _to, _value);
    }
}

然后添加您的代码以奖励矿工，但将“coinBalanceOf”更改为“balanceOf”，如下所示：

mapping (uint => address) miningReward;

function claimMiningReward() {
    if (miningReward[block.number] == 0) {
        balanceOf[block.coinbase] += 1;
        miningReward[block.number] = block.coinbase;
    }
}

所以你的最终合同应该是这样的：

contract MyToken { 
    /* Public variables of the token */
    string public name;
    string public symbol;
    uint8 public decimals;

    /* This creates an array with all balances */
    mapping (address => uint256) public balanceOf;

    /* This generates a public event on the blockchain that will notify clients */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function MyToken(uint256 _supply, string _name, string _symbol, uint8 _decimals) {
        /* if supply not given then generate 1 million of the smallest unit of the token */
        if (_supply == 0) _supply = 1000000;

        /* Unless you add other functions these variables will never change */
        balanceOf[msg.sender] = _supply;
        name = _name;     
        symbol = _symbol;

        /* If you want a divisible token then add the amount of decimals the base unit has  */
        decimals = _decimals;
    }

    /* Send coins */
    function transfer(address _to, uint256 _value) {
        /* if the sender doenst have enough balance then stop */
        if (balanceOf[msg.sender] < _value) throw;
        if (balanceOf[_to] + _value < balanceOf[_to]) throw;

        /* Add and subtract new balances */
        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += _value;

        /* Notifiy anyone listening that this transfer took place */
        Transfer(msg.sender, _to, _value);
    }

    mapping (uint => address) miningReward;

    function claimMiningReward() {
        if (miningReward[block.number] == 0) {
            balanceOf[block.coinbase] += 1;
            miningReward[block.number] = block.coinbase;
        }
    }

}

创建以太坊令牌作为采矿奖励

2 个答案: