cicnet/erc20-demurrage-token
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Truncate approve request out of value bounds

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lash
2023-10-05 17:41:52 +01:00
parent d7051b26c0
commit a40385a5a0
5 changed files with 37 additions and 4 deletions
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11
solidity/DemurrageTokenSingleNocap.sol
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@@ -6,6 +6,8 @@ import "aux/ABDKMath64x64.sol";
contract DemurrageTokenSingleNocap {
uint256 constant VALUE_LIMIT = 1 << 63;
struct redistributionItem {
uint32 period;
uint72 value;
@@ -597,7 +599,14 @@ contract DemurrageTokenSingleNocap {
changePeriod();
baseValue = toBaseAmount(_value);
// dex code will attempt uint256max approve, but contract cannot handle that size
// truncate to biggest possible value
if (_value <= VALUE_LIMIT) {
baseValue = toBaseAmount(_value);
} else {
baseValue = VALUE_LIMIT;
}
allowance[msg.sender][_spender] = baseValue;
emit Approval(msg.sender, _spender, _value);
return true;