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Read allowance from overridable function in increase/decrease (#3213)

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This commit is contained in:
Hadrien Croubois
2022-02-23 15:28:44 +01:00
committed by GitHub
parent f6b614a7c5
commit 3e74681e77
1 changed files with 2 additions and 2 deletions
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4
contracts/token/ERC20/ERC20.sol
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@ -180,7 +180,7 @@ contract ERC20 is Context, IERC20, IERC20Metadata {
*/ */
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender(); address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue); _approve(owner, spender, allowance(owner, spender) + addedValue);
return true; return true;
} }
@ -200,7 +200,7 @@ contract ERC20 is Context, IERC20, IERC20Metadata {
*/ */
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender(); address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender]; uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked { unchecked {
_approve(owner, spender, currentAllowance - subtractedValue); _approve(owner, spender, currentAllowance - subtractedValue);