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Optimize implementation of ERC20Capped (#2524)

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(cherry picked from commit 36b855972b)
This commit is contained in:
Hadrien Croubois
2021-02-24 23:07:03 +01:00
committed by Francisco Giordano
parent d5f4862405
commit 15214a53ce
2 changed files with 5 additions and 11 deletions
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15
contracts/token/ERC20/extensions/ERC20Capped.sol
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@ -27,17 +27,10 @@ abstract contract ERC20Capped is ERC20 {
}
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - minted tokens must not cause the total supply to go over the cap.
* @dev See {ERC20-_mint}.
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
if (from == address(0)) { // When minting tokens
require(totalSupply() + amount <= cap(), "ERC20Capped: cap exceeded");
}
function _mint(address account, uint256 amount) internal virtual override {
require(ERC20.totalSupply() + amount <= cap(), "ERC20Capped: cap exceeded");
super._mint(account, amount);
}
}