NoBey/openzeppelin-contracts
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add Prettier for linting and fix Solhint config (#2697)

Browse Source 
Co-authored-by: Francisco Giordano <frangio.1@gmail.com>
This commit is contained in:
Hadrien Croubois
2021-06-07 17:33:03 +02:00
committed by GitHub
parent e3661abe84
commit b0cf6fbb7a
134 changed files with 1816 additions and 1526 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
contracts/token/ERC20/extensions/ERC20FlashMint.sol
View File

@ -15,7 +15,7 @@ import "../ERC20.sol";
* _Available since v4.1._
*/
abstract contract ERC20FlashMint is ERC20, IERC3156FlashLender {
bytes32 constant private RETURN_VALUE = keccak256("ERC3156FlashBorrower.onFlashLoan");
bytes32 private constant _RETURN_VALUE = keccak256("ERC3156FlashBorrower.onFlashLoan");
/**
* @dev Returns the maximum amount of tokens available for loan.
@ -60,12 +60,13 @@ abstract contract ERC20FlashMint is ERC20, IERC3156FlashLender {
address token,
uint256 amount,
bytes calldata data
)
public virtual override returns (bool)
{
) public virtual override returns (bool) {
uint256 fee = flashFee(token, amount);
_mint(address(receiver), amount);
require(receiver.onFlashLoan(msg.sender, token, amount, fee, data) == RETURN_VALUE, "ERC20FlashMint: invalid return value");
require(
receiver.onFlashLoan(msg.sender, token, amount, fee, data) == _RETURN_VALUE,
"ERC20FlashMint: invalid return value"
);
uint256 currentAllowance = allowance(address(receiver), address(this));
require(currentAllowance >= amount + fee, "ERC20FlashMint: allowance does not allow refund");
_approve(address(receiver), address(this), currentAllowance - amount - fee);