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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.7.0; | |
import "../utils/Context.sol"; | |
/** | |
* @dev Contract module which provides a basic access control mechanism, where | |
* there is an account (an owner) that can be granted exclusive access to | |
* specific functions. | |
* |
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uint data; | |
address owner; |
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class MainPage extends React.Component { | |
render() { | |
return ( | |
<div> | |
Welecome to {this.props.title} | |
</div> | |
); | |
} | |
} |
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contract Sample | |
{ | |
uint data; | |
address owner; | |
event logData(uint256 dataToLog); | |
modifier onlyOwner() { | |
if (msg.sender != owner) throw; | |
_; |