Solidity-ERC20代币的锁仓与释放
时间: 2024-01-05 08:02:28 浏览: 55
在Solidity中,可以通过使用智能合约来实现ERC20代币的锁仓与释放。以下是一个简单的锁仓合约示例:
```
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./SafeMath.sol";
contract TokenVesting {
using SafeMath for uint256;
address public beneficiary;
uint256 public cliff;
uint256 public start;
uint256 public duration;
uint256 public released;
IERC20 public token;
constructor(
address _beneficiary,
uint256 _cliff,
uint256 _duration,
address _token
) public {
require(_beneficiary != address(0));
require(_cliff <= _duration);
beneficiary = _beneficiary;
cliff = _cliff;
duration = _duration;
start = block.timestamp;
token = IERC20(_token);
}
function release() public {
uint256 unreleased = releasableAmount();
require(unreleased > 0);
released = released.add(unreleased);
token.transfer(beneficiary, unreleased);
}
function releasableAmount() public view returns (uint256) {
return vestedAmount().sub(released);
}
function vestedAmount() public view returns (uint256) {
uint256 currentBalance = token.balanceOf(address(this));
uint256 totalBalance = currentBalance.add(released);
if (block.timestamp < start.add(cliff)) {
return 0;
} else if (block.timestamp >= start.add(duration)) {
return totalBalance;
} else {
return totalBalance.mul(block.timestamp.sub(start)).div(duration);
}
}
}
```
在这个合约中,当创建合约时,需要传入受益人地址、锁仓期、释放期、代币地址等信息。锁仓期结束后,受益人可以通过调用 `release()` 函数来释放锁仓代币。如果释放函数被调用,但是当前时间还没有到达释放期,则会抛出异常。
为了保证代币不能被提前释放,合约还实现了 cliff 的概念,即在锁仓期结束之前,代币不能被释放。当 cliff 结束之后,代币将按照线性方式释放,直到释放期结束。
需要注意的是,以上示例只是一个简单的锁仓合约示例,实际生产环境中需要更加严格地考虑各种情况和安全性问题。
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