Add bounds check

wbt · Oct 22, 2023 · ba746e9 · ba746e9
1 parent 803e0cc
commit ba746e9
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/packages/hardhat/contracts/SubscryptoToken.sol b/packages/hardhat/contracts/SubscryptoToken.sol
@@ -279,6 +279,7 @@ contract SubscryptoToken is ERC20, ERC20Burnable, Ownable, ERC20Permit {
 		address customer,
 		uint tierIndex
 	) private {
+		require(tierIndex < tiers[merchant].length, 'No such tier offered by this merchant.');
 		accountAtSubscriptionEnd(merchant, customer);
 		subscriptions[merchant][customer] = Subscription({
 			tier: tierIndex,