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add visibility stake

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Ricardo Guilherme Schmidt 2018-12-11 04:01:20 -02:00
parent 480a180c9e
commit b3c3ff5b70
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1 changed files with 50 additions and 0 deletions
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contracts/communication/VisibilityStake.sol Normal file
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pragma solidity >=0.5.0 <0.6.0;
import "../token/ERC20Token.sol";
import "../common/Controlled.sol";
contract VisibilityStake is Controlled {
struct Stake {
uint256 amount;
uint256 time;
}
ERC20Token public token;
uint256 public lockDelay;
mapping(bytes32 => uint256) public visibility;
mapping(address => mapping (bytes32 => Stake)) public stake;
constructor(ERC20Token _token, uint256 _lockDelay) public {
token = _token;
lockDelay = _lockDelay;
}
function deposit(bytes32 _publicKeyHash, uint256 _amount) external {
require(token.transferFrom(msg.sender, address(this), _amount), "Transfer error");
visibility[_publicKeyHash] += _amount;
stake[msg.sender][_publicKeyHash].amount += _amount;
stake[msg.sender][_publicKeyHash].time = now;
}
function withdraw(bytes32 _publicKeyHash) external {
uint256 time = stake[msg.sender][_publicKeyHash].time = now;
uint256 amount = stake[msg.sender][_publicKeyHash].amount;
require(time != 0 && time > now + lockDelay, "Locked stake");
delete stake[msg.sender][_publicKeyHash];
if(amount == 0) {
return;
}
require(visibility[_publicKeyHash] > amount, "Not available");
visibility[_publicKeyHash] -= amount;
}
function slash(bytes32 _publicKeyHash) external onlyController {
uint256 amount = visibility[_publicKeyHash];
delete visibility[_publicKeyHash];
require(token.transferFrom(address(this), msg.sender, amount), "Transfer error");
}
}