a7e91856f3
* Update to ganache-cli v6.1.0 and truffle v4.1.0 * Update to stable version of ganache-cli * fix: update event emission warning - Fix event emission warnings for solidity 4.21 after truffle has been updated to use this version * fix pr review comments * update to truffle v4.1.5 * update package-lock * add additional emit keywords * update solidity-coverage to 0.4.15 * update to solium 1.1.6 * fix MerkleProof coverage analysis by testing through wrapper * change version pragma to ^0.4.21 * fix solium linting errors
43 lines
1.2 KiB
Solidity
43 lines
1.2 KiB
Solidity
pragma solidity ^0.4.21;
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import "../Crowdsale.sol";
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import "../../token/ERC20/ERC20.sol";
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import "../../math/SafeMath.sol";
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/**
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* @title AllowanceCrowdsale
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* @dev Extension of Crowdsale where tokens are held by a wallet, which approves an allowance to the crowdsale.
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*/
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contract AllowanceCrowdsale is Crowdsale {
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using SafeMath for uint256;
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address public tokenWallet;
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/**
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* @dev Constructor, takes token wallet address.
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* @param _tokenWallet Address holding the tokens, which has approved allowance to the crowdsale
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*/
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function AllowanceCrowdsale(address _tokenWallet) public {
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require(_tokenWallet != address(0));
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tokenWallet = _tokenWallet;
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}
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/**
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* @dev Checks the amount of tokens left in the allowance.
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* @return Amount of tokens left in the allowance
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*/
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function remainingTokens() public view returns (uint256) {
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return token.allowance(tokenWallet, this);
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}
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/**
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* @dev Overrides parent behavior by transferring tokens from wallet.
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* @param _beneficiary Token purchaser
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* @param _tokenAmount Amount of tokens purchased
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*/
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function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal {
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token.transferFrom(tokenWallet, _beneficiary, _tokenAmount);
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}
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}
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