7ac0502c50
* Change import path from zos-lib to upgrades in all contracts * Update readme with new naming * Update package and deps names * Change path to initializable in AST of networks.jsons * Migrate manifest version * Use new oz file locations * Rename in ERC20Migrator comments * Update SDK install instructions in README * Update gitignore to use new session file name * trigger CI * Fixes to readme and package version * Use 2.5.0 release of OpenZeppelin SDK
32 lines
1.1 KiB
Solidity
32 lines
1.1 KiB
Solidity
pragma solidity ^0.5.2;
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import "@openzeppelin/upgrades/contracts/Initializable.sol";
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import "../Crowdsale.sol";
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import "../../lifecycle/Pausable.sol";
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/**
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* @title PausableCrowdsale
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* @dev Extension of Crowdsale contract where purchases can be paused and unpaused by the pauser role.
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*/
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contract PausableCrowdsale is Initializable, Crowdsale, Pausable {
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function initialize(address sender) public initializer {
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assert(Crowdsale._hasBeenInitialized());
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Pausable.initialize(sender);
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}
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/**
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* @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met.
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* Use super to concatenate validations.
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* Adds the validation that the crowdsale must not be paused.
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* @param _beneficiary Address performing the token purchase
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* @param _weiAmount Value in wei involved in the purchase
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*/
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function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal view whenNotPaused {
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return super._preValidatePurchase(_beneficiary, _weiAmount);
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}
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uint256[50] private ______gap;
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}
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