版权声明：本文为Sunface(孙飞)原创文章，转载请注明出处 https://blog.csdn.net/abv123456789/article/details/79789007
虽然国家目前严令禁止ICO，但是我觉得基于区块链平台的虚拟币本身是很有价值的，大家只要不去碰基于发币的ICO就好，因此这里简单谈谈怎么在以太坊发行自己的代币(Test网络)。
翻墙
目前来说，相关的网站很多都是被墙的，因此没有梯子建议就放弃吧，推荐自己购买香港或者海外的云服务器，用shadowsocks搭建代理，注意如果用阿里云的话，不要用视频等大流量服务，可能会被封。
下载安装
下载并安装最新版本以太坊钱包
选择网络
下载好以太坊钱包后选择testnet,别选成mainnet了,创建代币合约和转账代币是要收费的。选好testnet后，钱包会去同步区块信息，目前都是快速同步区块的header，而且是点对点的方式，所以很快。
创建账户
在钱包界面选择Wallet，然后选择ADD ACCOUNT
领取测试环境的以太币ether
新建完账户，余额是0.00ether
因此我们需要领取一些rinkeby测试环境的ether,进入链接,可以看到有三种方法获取,我们就用第一种发推特的方式,点击下面圈出来的tweet的链接:
接着会弹出以下推文,把0x0000…换成你的账户地址0x…，然后发布推文即可：
接着进入twitter，找到发表的推文，拷贝链接：
最后回到领取ether的链接，把推文链接粘贴进去
过大概3-10分钟，就能在你的钱包看到ether币了！
创建智能合约
拷贝以下合约代码(这段代码是从官方的token例子
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract TokenERC20 {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
/**
* Constructor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function TokenERC20(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
emit Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` on behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
emit Burn(msg.sender, _value);
return true;
}
/**
* Destroy tokens from other account
*
* Remove `_value` tokens from the system irreversibly on behalf of `_from`.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
emit Burn(_from, _value);
return true;
}
}
token name ,和 token symbol自己可以随便命名，然后把费用Fee拉到最大（Faster,为了更快的让矿工记录你的合约),最后点击发布就ok了。
发起转账
目标账户地址可以填写[0x8DF451466Ee0e75F73eafB36a8C0833F3022a687](/send/0x8DF451466Ee0e75F73eafB36a8C0833F3022a687 "0x8DF451466Ee0e75F73eafB36a8C0833F3022a687")
查看转账信息
点击其中一笔转账
点击上图的Transaction下的蓝色地址，可以前往rinkeby.io查看详细信息
小结
发代币的基本方法已经介绍完了，在后续章节，会继续介绍发行代币的高级技巧，欢迎大家订阅。
这里要额外提一下，发代币的关键就是智能合约，而智能合约一旦上传是不可变的，因此请务必小心谨慎：
- 确保智能合约没有Bug，一旦存在Bug，你就别想去修复了
- 代码要尽量简洁，代码越长，执行费用越高（每次转账都要执行一次)
同时，大家也可以在这里查看代币的Coin