solidity/test/compilationTests/gnosis/Tokens/OutcomeToken.sol
2020-07-07 12:16:18 +02:00

63 lines
1.7 KiB
Solidity

pragma solidity >=0.0;
import "../Tokens/StandardToken.sol";
/// @title Outcome token contract - Issuing and revoking outcome tokens
/// @author Stefan George - <stefan@gnosis.pm>
contract OutcomeToken is StandardToken {
using Math for *;
/*
* Events
*/
event Issuance(address indexed owner, uint amount);
event Revocation(address indexed owner, uint amount);
/*
* Storage
*/
address public eventContract;
/*
* Modifiers
*/
modifier isEventContract () {
// Only event contract is allowed to proceed
require(msg.sender == eventContract);
_;
}
/*
* Public functions
*/
/// @dev Constructor sets events contract address
constructor()
{
eventContract = msg.sender;
}
/// @dev Events contract issues new tokens for address. Returns success
/// @param _for Address of receiver
/// @param outcomeTokenCount Number of tokens to issue
function issue(address _for, uint outcomeTokenCount)
public
isEventContract
{
balances[_for] = balances[_for].add(outcomeTokenCount);
totalTokens = totalTokens.add(outcomeTokenCount);
emit Issuance(_for, outcomeTokenCount);
}
/// @dev Events contract revokes tokens for address. Returns success
/// @param _for Address of token holder
/// @param outcomeTokenCount Number of tokens to revoke
function revoke(address _for, uint outcomeTokenCount)
public
isEventContract
{
balances[_for] = balances[_for].sub(outcomeTokenCount);
totalTokens = totalTokens.sub(outcomeTokenCount);
emit Revocation(_for, outcomeTokenCount);
}
}