add permit

2020-11-29 23:40:19 +08:00
parent d90e031a30
commit 7290f73634
12 changed files with 602 additions and 18 deletions
--- a/contracts/DODOVendingMachine/impl/DVMStorage.sol
+++ b/contracts/DODOVendingMachine/impl/DVMStorage.sol
@@ -49,6 +49,14 @@ contract DVMStorage is InitializableOwnable, ReentrancyGuard {
    mapping(address => uint256) internal _SHARES_;
    mapping(address => mapping(address => uint256)) internal _ALLOWED_;

+
+    // ================= Permit ======================        
+    bytes32 public DOMAIN_SEPARATOR;
+    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
+    bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
+    mapping(address => uint256) public nonces;
+    // ===============================================
+
    // ============ Variables for Pricing ============

    IFeeRateModel public _LP_FEE_RATE_MODEL_;