use ERC20 datatype

contracts/DataTypes.sol

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: MIT
 pragma solidity 0.8.9;
 
+import { ERC20 } from "./lib/tokens/ERC20.sol";
+
 library DataTypes {
     struct Lock {
         uint256 sellerKey;
@@ -19,7 +21,7 @@ library DataTypes {
         /// @dev Relayer address (msg.sender) that facilitated this transaction.
         /// @dev Reputation points accruer.
         address relayerAddress;
-        address token;
+        ERC20 token;
     }
 
     // prettier-ignore

contracts/EventAndErrors.sol

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: MIT
 pragma solidity 0.8.9;
 
+import { ERC20 } from "./lib/tokens/ERC20.sol";
+
 // prettier-ignore
 interface EventAndErrors {
     /// ███ Events ████████████████████████████████████████████████████████████
@@ -8,17 +10,17 @@ interface EventAndErrors {
     event DepositAdded(
         address indexed seller,
         // uint256 depositID,
-        address token,
+        ERC20 token,
         uint256 amount
     );
     event ValidSet(
         address indexed seller,
-        address token,
+        ERC20 token,
         bool state
     );
     event DepositWithdrawn(
         address indexed seller,
-        address token,
+        ERC20 token,
         uint256 amount
     );
     event LockAdded(

contracts/p2pix.sol

@@ -78,7 +78,7 @@ contract P2PIX is
         uint256 defaultBlocks,
         address[] memory validSigners,
         IReputation _reputation,
-        address[] memory tokens,
+        ERC20[] memory tokens,
         bool[] memory tokenStates
     ) payable {
         setDefaultLockBlocks(defaultBlocks);
@@ -97,7 +97,7 @@ contract P2PIX is
     /// as the deposit identifier.
     /// @dev Function sighash: 0xbfe07da6.
     function deposit(
-        address _token,
+        ERC20 _token,
         uint96 _amount,
         uint160 _pixTarget,
         bool _valid,
@@ -166,7 +166,7 @@ contract P2PIX is
 
             sellerBalance[key][token] = _sellerBalance;
 
-            emit ValidSet(msg.sender, address(token), state);
+            emit ValidSet(msg.sender, token, state);
         } else revert NotInitialized();
     }
 
@@ -191,7 +191,7 @@ contract P2PIX is
     /// @dev Function sighash: 0x03aaf306.
     function lock(
         address _seller,
-        address _token,
+        ERC20 _token,
         address _buyerAddress,
         address _relayerTarget,
         uint256 _relayerPremium,
@@ -201,7 +201,7 @@ contract P2PIX is
     ) public nonReentrant returns (uint256) {
         unlockExpired(expiredLocks);
 
-        ERC20 t = ERC20(_token);
+        ERC20 t = _token;
         if (!getValid(_seller, t)) revert InvalidDeposit();
 
         uint256 bal = getBalance(_seller, t);
@@ -246,7 +246,7 @@ contract P2PIX is
             _buyerAddress,
             _relayerTarget,
             msg.sender,
-            address(t)
+            t
         );
 
         _addLock(bal, _amount, cCounter, l, t, k);
@@ -379,12 +379,12 @@ contract P2PIX is
 
             uint256 _sellerBalance = sellerBalance[
                 l.sellerKey
-            ][ERC20(l.token)] & BITMASK_SB_ENTRY;
+            ][l.token] & BITMASK_SB_ENTRY;
 
             if ((_sellerBalance + l.amount) > 1e8 ether)
                 revert MaxBalExceeded();
 
-            sellerBalance[l.sellerKey][ERC20(l.token)] += l
+            sellerBalance[l.sellerKey][l.token] += l
                 .amount;
 
             l.amount = 0;
@@ -448,7 +448,7 @@ contract P2PIX is
 
         emit DepositWithdrawn(
             msg.sender,
-            address(token),
+            token,
             amount
         );
     }
@@ -513,7 +513,7 @@ contract P2PIX is
     }
 
     function tokenSettings(
-        address[] memory _tokens,
+        ERC20[] memory _tokens,
         bool[] memory _states
     ) public onlyOwner {
         /* Yul Impl */