5dfe7215a9
* Initial migration to Solidity 0.6.x - v3.0 first steps (#2063) * Initial migration, missing GSN, 721, 777 and Crowdsales. * Add _beforeTokenOperation and _afterTokenOperation. * Add documentation for hooks. * Add hooks doc * Add missing drafts * Add back ERC721 with hooks * Bring back ERC777 * Notes on hooks * Bring back GSN * Make functions virtual * Make GSN overrides explicit * Fix ERC20Pausable tests * Remove virtual from some view functions * Update linter * Delete examples * Remove unnecessary virtual * Remove roles from Pausable * Remove roles * Remove users of roles * Adapt ERC20 tests * Fix ERC721 tests * Add all ERC721 hooks * Add ERC777 hooks * Fix remaining tests * Bump compiler version * Move 721BurnableMock into mocks directory * Remove _before hooks * Fix tests * Upgrade linter * Put modifiers last * Remove _beforeTokenApproval and _beforeOperatorApproval hooks
27 lines
1.1 KiB
Solidity
27 lines
1.1 KiB
Solidity
pragma solidity ^0.6.0;
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/*
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* @dev Provides information about the current execution context, including the
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* sender of the transaction and its data. While these are generally available
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* via msg.sender and msg.data, they should not be accessed in such a direct
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* manner, since when dealing with GSN meta-transactions the account sending and
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* paying for execution may not be the actual sender (as far as an application
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* is concerned).
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*
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* This contract is only required for intermediate, library-like contracts.
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*/
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contract Context {
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// Empty internal constructor, to prevent people from mistakenly deploying
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// an instance of this contract, which should be used via inheritance.
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constructor () internal { }
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function _msgSender() internal view virtual returns (address payable) {
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return msg.sender;
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}
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function _msgData() internal view virtual returns (bytes memory) {
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this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
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return msg.data;
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}
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}
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