Increase integer size for _tokenReleased (#120)

Author: arr00

contracts/finance/VestingWalletConfidential.sol

@@ -25,7 +25,7 @@ import {IConfidentialFungibleToken} from "./../interfaces/IConfidentialFungibleT
 abstract contract VestingWalletConfidential is OwnableUpgradeable, ReentrancyGuardTransient {
     /// @custom:storage-location erc7201:openzeppelin.storage.VestingWalletConfidential
     struct VestingWalletStorage {
-        mapping(address token => euint64) _tokenReleased;
+        mapping(address token => euint128) _tokenReleased;
         uint64 _start;
         uint64 _duration;
     }
@@ -53,7 +53,7 @@ abstract contract VestingWalletConfidential is OwnableUpgradeable, ReentrancyGua
     }
 
     /// @dev Amount of token already released
-    function released(address token) public view virtual returns (euint64) {
+    function released(address token) public view virtual returns (euint128) {
         return _getVestingWalletStorage()._tokenReleased[token];
     }
 
@@ -75,7 +75,7 @@ abstract contract VestingWalletConfidential is OwnableUpgradeable, ReentrancyGua
         FHE.allowTransient(amount, token);
         euint64 amountSent = IConfidentialFungibleToken(token).confidentialTransfer(owner(), amount);
 
-        euint64 newReleasedAmount = FHE.add(released(token), amountSent);
+        euint128 newReleasedAmount = FHE.add(released(token), amountSent);
         FHE.allow(newReleasedAmount, owner());
         FHE.allowThis(newReleasedAmount);
         _getVestingWalletStorage()._tokenReleased[token] = newReleasedAmount;