add Available since 4.1 comments

(cherry picked from commit 9a698e6b7b)
2021-04-19 20:55:16 +02:00
parent 915109b2c4
commit df7996b671
13 changed files with 24 additions and 2 deletions
--- a/contracts/token/ERC20/extensions/draft-ERC20Permit.sol
+++ b/contracts/token/ERC20/extensions/draft-ERC20Permit.sol
@ -77,6 +77,8 @@ abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {

    /**
     * @dev "Consume a nonce": return the current value and increment.
+     *
+     * _Available since v4.1._
     */
    function _useNonce(address owner) internal virtual returns (uint256 current) {
        Counters.Counter storage nonce = _nonces[owner];