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61 lines
1.2 KiB
61 lines
1.2 KiB
pragma solidity ^0.4.24;
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import "./ERC20.sol";
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import "../../access/roles/MinterRole.sol";
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/**
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* @title ERC20Mintable
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* @dev ERC20 minting logic
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*/
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contract ERC20Mintable is ERC20, MinterRole {
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event MintingFinished();
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bool private _mintingFinished = false;
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modifier onlyBeforeMintingFinished() {
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require(!_mintingFinished);
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_;
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}
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/**
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* @return true if the minting is finished.
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*/
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function mintingFinished() public view returns(bool) {
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return _mintingFinished;
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}
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/**
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* @dev Function to mint tokens
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* @param to The address that will receive the minted tokens.
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* @param amount The amount of tokens to mint.
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* @return A boolean that indicates if the operation was successful.
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*/
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function mint(
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address to,
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uint256 amount
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)
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public
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onlyMinter
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onlyBeforeMintingFinished
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returns (bool)
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{
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_mint(to, amount);
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return true;
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}
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/**
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* @dev Function to stop minting new tokens.
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* @return True if the operation was successful.
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*/
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function finishMinting()
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public
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onlyMinter
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onlyBeforeMintingFinished
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returns (bool)
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{
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_mintingFinished = true;
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emit MintingFinished();
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return true;
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}
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}
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