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// SPDX-License-Identifier: MIT | |
// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol) | |
pragma solidity ^0.8.0; | |
import "./IAccessControl.sol"; | |
import "../utils/Context.sol"; | |
import "../utils/Strings.sol"; | |
import "../utils/introspection/ERC165.sol"; |
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// SPDX-License-Identifier: MIT | |
// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol) | |
pragma solidity ^0.8.0; | |
import "./IAccessControl.sol"; | |
import "../utils/Context.sol"; | |
import "../utils/Strings.sol"; | |
import "../utils/introspection/ERC165.sol"; |
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// SPDX-License-Identifier: MIT | |
pragma solidity >=0.4.22 <0.9.0; | |
contract CourseMarketplace { | |
enum State { | |
Purchased, | |
Activated, | |
Deactivated | |
} |
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pragma solidity >=0.4.22 <0.7.0; | |
/** | |
* @title Storage | |
* @dev Store & retreive value in a variable | |
*/ | |
contract Storage { | |
uint256 number; |
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pragma solidity >=0.4.22 <0.6.0; | |
contract Ballot { | |
struct Voter { | |
uint weight; | |
bool voted; | |
uint8 vote; | |
address delegate; | |
} | |
struct Proposal { |
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pragma solidity >=0.4.22 <0.6.0; | |
contract Ballot { | |
struct Voter { | |
uint weight; | |
bool voted; | |
uint8 vote; | |
address delegate; | |
} | |
struct Proposal { |
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pragma solidity >=0.4.22 <0.6.0; | |
contract Ballot { | |
struct Voter { | |
uint weight; | |
bool voted; | |
uint8 vote; | |
address delegate; | |
} | |
struct Proposal { |