diff --git a/artifacts/contracts/Reputation.sol/Reputation.dbg.json b/artifacts/contracts/Reputation.sol/Reputation.dbg.json
index 8bc604e..6f4fea0 100644
--- a/artifacts/contracts/Reputation.sol/Reputation.dbg.json
+++ b/artifacts/contracts/Reputation.sol/Reputation.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/Reputation.sol/Reputation.json b/artifacts/contracts/Reputation.sol/Reputation.json
index c56dcd7..6f2b440 100644
--- a/artifacts/contracts/Reputation.sol/Reputation.json
+++ b/artifacts/contracts/Reputation.sol/Reputation.json
@@ -5,7 +5,7 @@
   "abi": [
     {
       "inputs": [],
-      "stateMutability": "nonpayable",
+      "stateMutability": "payable",
       "type": "constructor"
     },
     {
@@ -54,8 +54,8 @@
       "type": "function"
     }
   ],
-  "bytecode": "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",
-  "deployedBytecode": "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",
+  "bytecode": "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",
+  "deployedBytecode": "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",
   "linkReferences": {},
   "deployedLinkReferences": {}
 }
diff --git a/artifacts/contracts/core/BaseUtils.sol/BaseUtils.dbg.json b/artifacts/contracts/core/BaseUtils.sol/BaseUtils.dbg.json
index 59166bc..c80ca42 100644
--- a/artifacts/contracts/core/BaseUtils.sol/BaseUtils.dbg.json
+++ b/artifacts/contracts/core/BaseUtils.sol/BaseUtils.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/core/BaseUtils.sol/BaseUtils.json b/artifacts/contracts/core/BaseUtils.sol/BaseUtils.json
index b4e72a7..6cd6c4c 100644
--- a/artifacts/contracts/core/BaseUtils.sol/BaseUtils.json
+++ b/artifacts/contracts/core/BaseUtils.sol/BaseUtils.json
@@ -83,6 +83,11 @@
       "name": "OnlySeller",
       "type": "error"
     },
+    {
+      "inputs": [],
+      "name": "Reentrancy",
+      "type": "error"
+    },
     {
       "inputs": [],
       "name": "StaticCallFailed",
@@ -330,6 +335,25 @@
       "name": "RootUpdated",
       "type": "event"
     },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "forwarder",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "bool",
+          "name": "state",
+          "type": "bool"
+        }
+      ],
+      "name": "TrustedForwarderUpdated",
+      "type": "event"
+    },
     {
       "anonymous": false,
       "inputs": [
@@ -438,6 +462,44 @@
       "stateMutability": "view",
       "type": "function"
     },
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "str",
+          "type": "string"
+        }
+      ],
+      "name": "getStr",
+      "outputs": [
+        {
+          "internalType": "bytes32",
+          "name": "strEnc",
+          "type": "bytes32"
+        }
+      ],
+      "stateMutability": "pure",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "isTrustedForwarder",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
     {
       "inputs": [],
       "name": "owner",
@@ -522,6 +584,24 @@
       "stateMutability": "nonpayable",
       "type": "function"
     },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "forwarders",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bool[]",
+          "name": "states",
+          "type": "bool[]"
+        }
+      ],
+      "name": "setTrustedFowarders",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
     {
       "inputs": [
         {
diff --git a/artifacts/contracts/core/Constants.sol/Constants.dbg.json b/artifacts/contracts/core/Constants.sol/Constants.dbg.json
index 59166bc..c80ca42 100644
--- a/artifacts/contracts/core/Constants.sol/Constants.dbg.json
+++ b/artifacts/contracts/core/Constants.sol/Constants.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/core/DataTypes.sol/DataTypes.dbg.json b/artifacts/contracts/core/DataTypes.sol/DataTypes.dbg.json
index 31c2d9a..c80ca42 100644
--- a/artifacts/contracts/core/DataTypes.sol/DataTypes.dbg.json
+++ b/artifacts/contracts/core/DataTypes.sol/DataTypes.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../build-info/c96aab92784d63ce08c6b112913f46c8.json"
+  "buildInfo": "../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/core/DataTypes.sol/DataTypes.json b/artifacts/contracts/core/DataTypes.sol/DataTypes.json
index 4d2fd64..2ee0216 100644
--- a/artifacts/contracts/core/DataTypes.sol/DataTypes.json
+++ b/artifacts/contracts/core/DataTypes.sol/DataTypes.json
@@ -3,8 +3,8 @@
   "contractName": "DataTypes",
   "sourceName": "contracts/core/DataTypes.sol",
   "abi": [],
-  "bytecode": "0x60808060405234601757603a9081601d823930815050f35b600080fdfe600080fdfea2646970667358221220ed19291aba408239fe7ce17eba420cb350ea83c88994bb2b37733371feac745f64736f6c63430008130033",
-  "deployedBytecode": "0x600080fdfea2646970667358221220ed19291aba408239fe7ce17eba420cb350ea83c88994bb2b37733371feac745f64736f6c63430008130033",
+  "bytecode": "0x60808060405234601757603a9081601d823930815050f35b600080fdfe600080fdfea2646970667358221220a40e6f94f4c0b9a9cdd9ac64f98613aece8f5a3f084ee1eca35eba466df9810964736f6c63430008130033",
+  "deployedBytecode": "0x600080fdfea2646970667358221220a40e6f94f4c0b9a9cdd9ac64f98613aece8f5a3f084ee1eca35eba466df9810964736f6c63430008130033",
   "linkReferences": {},
   "deployedLinkReferences": {}
 }
diff --git a/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.dbg.json b/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.dbg.json
index 59166bc..c80ca42 100644
--- a/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.dbg.json
+++ b/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.json b/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.json
index aec78e0..68d67ee 100644
--- a/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.json
+++ b/artifacts/contracts/core/EventAndErrors.sol/EventAndErrors.json
@@ -306,6 +306,25 @@
       "name": "RootUpdated",
       "type": "event"
     },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "forwarder",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "bool",
+          "name": "state",
+          "type": "bool"
+        }
+      ],
+      "name": "TrustedForwarderUpdated",
+      "type": "event"
+    },
     {
       "anonymous": false,
       "inputs": [
diff --git a/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.dbg.json b/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.dbg.json
index 59166bc..c80ca42 100644
--- a/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.dbg.json
+++ b/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.json b/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.json
index 3508498..6363826 100644
--- a/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.json
+++ b/artifacts/contracts/core/OwnerSettings.sol/OwnerSettings.json
@@ -330,6 +330,25 @@
       "name": "RootUpdated",
       "type": "event"
     },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "forwarder",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "bool",
+          "name": "state",
+          "type": "bool"
+        }
+      ],
+      "name": "TrustedForwarderUpdated",
+      "type": "event"
+    },
     {
       "anonymous": false,
       "inputs": [
@@ -400,6 +419,25 @@
       "stateMutability": "view",
       "type": "function"
     },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "isTrustedForwarder",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
     {
       "inputs": [],
       "name": "owner",
@@ -484,6 +522,24 @@
       "stateMutability": "nonpayable",
       "type": "function"
     },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "forwarders",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bool[]",
+          "name": "states",
+          "type": "bool[]"
+        }
+      ],
+      "name": "setTrustedFowarders",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
     {
       "inputs": [
         {
diff --git a/artifacts/contracts/lib/auth/Owned.sol/Owned.dbg.json b/artifacts/contracts/lib/auth/Owned.sol/Owned.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/auth/Owned.sol/Owned.dbg.json
+++ b/artifacts/contracts/lib/auth/Owned.sol/Owned.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/interfaces/IReputation.sol/IReputation.dbg.json b/artifacts/contracts/lib/interfaces/IReputation.sol/IReputation.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/interfaces/IReputation.sol/IReputation.dbg.json
+++ b/artifacts/contracts/lib/interfaces/IReputation.sol/IReputation.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/metatx/ERC2771Context.sol/Context.dbg.json b/artifacts/contracts/lib/metatx/ERC2771Context.sol/Context.dbg.json
new file mode 100644
index 0000000..3b65efe
--- /dev/null
+++ b/artifacts/contracts/lib/metatx/ERC2771Context.sol/Context.dbg.json
@@ -0,0 +1,4 @@
+{
+  "_format": "hh-sol-dbg-1",
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
+}
diff --git a/artifacts/contracts/lib/metatx/ERC2771Context.sol/Context.json b/artifacts/contracts/lib/metatx/ERC2771Context.sol/Context.json
new file mode 100644
index 0000000..f3231c8
--- /dev/null
+++ b/artifacts/contracts/lib/metatx/ERC2771Context.sol/Context.json
@@ -0,0 +1,10 @@
+{
+  "_format": "hh-sol-artifact-1",
+  "contractName": "Context",
+  "sourceName": "contracts/lib/metatx/ERC2771Context.sol",
+  "abi": [],
+  "bytecode": "0x",
+  "deployedBytecode": "0x",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}
diff --git a/artifacts/contracts/lib/metatx/ERC2771Context.sol/ERC2771Context.dbg.json b/artifacts/contracts/lib/metatx/ERC2771Context.sol/ERC2771Context.dbg.json
new file mode 100644
index 0000000..3b65efe
--- /dev/null
+++ b/artifacts/contracts/lib/metatx/ERC2771Context.sol/ERC2771Context.dbg.json
@@ -0,0 +1,4 @@
+{
+  "_format": "hh-sol-dbg-1",
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
+}
diff --git a/artifacts/contracts/lib/metatx/ERC2771Context.sol/ERC2771Context.json b/artifacts/contracts/lib/metatx/ERC2771Context.sol/ERC2771Context.json
new file mode 100644
index 0000000..655f88f
--- /dev/null
+++ b/artifacts/contracts/lib/metatx/ERC2771Context.sol/ERC2771Context.json
@@ -0,0 +1,30 @@
+{
+  "_format": "hh-sol-artifact-1",
+  "contractName": "ERC2771Context",
+  "sourceName": "contracts/lib/metatx/ERC2771Context.sol",
+  "abi": [
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "isTrustedForwarder",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    }
+  ],
+  "bytecode": "0x",
+  "deployedBytecode": "0x",
+  "linkReferences": {},
+  "deployedLinkReferences": {}
+}
diff --git a/artifacts/contracts/lib/mock/mockToken.sol/MockToken.dbg.json b/artifacts/contracts/lib/mock/mockToken.sol/MockToken.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/mock/mockToken.sol/MockToken.dbg.json
+++ b/artifacts/contracts/lib/mock/mockToken.sol/MockToken.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/tokens/ERC20.sol/ERC20.dbg.json b/artifacts/contracts/lib/tokens/ERC20.sol/ERC20.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/tokens/ERC20.sol/ERC20.dbg.json
+++ b/artifacts/contracts/lib/tokens/ERC20.sol/ERC20.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/utils/ECDSA.sol/ECDSA.dbg.json b/artifacts/contracts/lib/utils/ECDSA.sol/ECDSA.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/utils/ECDSA.sol/ECDSA.dbg.json
+++ b/artifacts/contracts/lib/utils/ECDSA.sol/ECDSA.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/utils/MerkleProofLib.sol/MerkleProofLib.dbg.json b/artifacts/contracts/lib/utils/MerkleProofLib.sol/MerkleProofLib.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/utils/MerkleProofLib.sol/MerkleProofLib.dbg.json
+++ b/artifacts/contracts/lib/utils/MerkleProofLib.sol/MerkleProofLib.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/utils/Multicall.sol/Multicall.dbg.json b/artifacts/contracts/lib/utils/Multicall.sol/Multicall.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/utils/Multicall.sol/Multicall.dbg.json
+++ b/artifacts/contracts/lib/utils/Multicall.sol/Multicall.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/utils/ReentrancyGuard.sol/ReentrancyGuard.dbg.json b/artifacts/contracts/lib/utils/ReentrancyGuard.sol/ReentrancyGuard.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/utils/ReentrancyGuard.sol/ReentrancyGuard.dbg.json
+++ b/artifacts/contracts/lib/utils/ReentrancyGuard.sol/ReentrancyGuard.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/lib/utils/SafeTransferLib.sol/SafeTransferLib.dbg.json b/artifacts/contracts/lib/utils/SafeTransferLib.sol/SafeTransferLib.dbg.json
index c3f96c4..3b65efe 100644
--- a/artifacts/contracts/lib/utils/SafeTransferLib.sol/SafeTransferLib.dbg.json
+++ b/artifacts/contracts/lib/utils/SafeTransferLib.sol/SafeTransferLib.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../../../build-info/e227c161b97af39988677e65180082ec.json"
+  "buildInfo": "../../../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/p2pix.sol/P2PIX.dbg.json b/artifacts/contracts/p2pix.sol/P2PIX.dbg.json
index 7cd1dbf..6f4fea0 100644
--- a/artifacts/contracts/p2pix.sol/P2PIX.dbg.json
+++ b/artifacts/contracts/p2pix.sol/P2PIX.dbg.json
@@ -1,4 +1,4 @@
 {
   "_format": "hh-sol-dbg-1",
-  "buildInfo": "../../build-info/2fbad03752b21beeabf4fed16acdbf91.json"
+  "buildInfo": "../../build-info/291bd612212fb4c1e87cae2657c915eb.json"
 }
diff --git a/artifacts/contracts/p2pix.sol/P2PIX.json b/artifacts/contracts/p2pix.sol/P2PIX.json
index 7491af9..2cdebec 100644
--- a/artifacts/contracts/p2pix.sol/P2PIX.json
+++ b/artifacts/contracts/p2pix.sol/P2PIX.json
@@ -366,6 +366,25 @@
       "name": "RootUpdated",
       "type": "event"
     },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "forwarder",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "bool",
+          "name": "state",
+          "type": "bool"
+        }
+      ],
+      "name": "TrustedForwarderUpdated",
+      "type": "event"
+    },
     {
       "anonymous": false,
       "inputs": [
@@ -487,9 +506,9 @@
           "type": "uint96"
         },
         {
-          "internalType": "uint160",
+          "internalType": "string",
           "name": "_pixTarget",
-          "type": "uint160"
+          "type": "string"
         },
         {
           "internalType": "bool",
@@ -595,14 +614,57 @@
       "name": "getPixTarget",
       "outputs": [
         {
-          "internalType": "uint160",
+          "internalType": "bytes32",
           "name": "pixTarget",
-          "type": "uint160"
+          "type": "bytes32"
         }
       ],
       "stateMutability": "view",
       "type": "function"
     },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "seller",
+          "type": "address"
+        },
+        {
+          "internalType": "contract ERC20",
+          "name": "token",
+          "type": "address"
+        }
+      ],
+      "name": "getPixTargetString",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "pixTarget",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "str",
+          "type": "string"
+        }
+      ],
+      "name": "getStr",
+      "outputs": [
+        {
+          "internalType": "bytes32",
+          "name": "strEnc",
+          "type": "bytes32"
+        }
+      ],
+      "stateMutability": "pure",
+      "type": "function"
+    },
     {
       "inputs": [
         {
@@ -627,6 +689,25 @@
       "stateMutability": "view",
       "type": "function"
     },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "isTrustedForwarder",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
     {
       "inputs": [
         {
@@ -689,26 +770,6 @@
       ],
       "name": "mapLocks",
       "outputs": [
-        {
-          "internalType": "uint80",
-          "name": "amount",
-          "type": "uint80"
-        },
-        {
-          "internalType": "uint160",
-          "name": "pixTarget",
-          "type": "uint160"
-        },
-        {
-          "internalType": "address",
-          "name": "token",
-          "type": "address"
-        },
-        {
-          "internalType": "address",
-          "name": "buyerAddress",
-          "type": "address"
-        },
         {
           "internalType": "uint256",
           "name": "sellerKey",
@@ -723,6 +784,26 @@
           "internalType": "uint256",
           "name": "expirationBlock",
           "type": "uint256"
+        },
+        {
+          "internalType": "bytes32",
+          "name": "pixTarget",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "uint80",
+          "name": "amount",
+          "type": "uint80"
+        },
+        {
+          "internalType": "address",
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "buyerAddress",
+          "type": "address"
         }
       ],
       "stateMutability": "view",
@@ -806,30 +887,6 @@
       "stateMutability": "view",
       "type": "function"
     },
-    {
-      "inputs": [
-        {
-          "internalType": "uint256",
-          "name": "sellerKey",
-          "type": "uint256"
-        },
-        {
-          "internalType": "contract ERC20",
-          "name": "erc20",
-          "type": "address"
-        }
-      ],
-      "name": "sellerBalance",
-      "outputs": [
-        {
-          "internalType": "uint256",
-          "name": "packed",
-          "type": "uint256"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
     {
       "inputs": [
         {
@@ -887,6 +944,24 @@
       "stateMutability": "nonpayable",
       "type": "function"
     },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "forwarders",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bool[]",
+          "name": "states",
+          "type": "bool[]"
+        }
+      ],
+      "name": "setTrustedFowarders",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
     {
       "inputs": [
         {
@@ -1041,8 +1116,8 @@
       "type": "receive"
     }
   ],
-  "bytecode": 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   "linkReferences": {},
   "deployedLinkReferences": {}
 }
diff --git a/contracts/Reputation.sol b/contracts/Reputation.sol
index ebf4096..888e1e0 100644
--- a/contracts/Reputation.sol
+++ b/contracts/Reputation.sol
@@ -12,7 +12,7 @@ contract Reputation is IReputation {
     // prettier-ignore
     // solhint-disable no-inline-assembly
     // solhint-disable-next-line no-empty-blocks
-    constructor(/*  */) {/*  */}
+    constructor(/*  */) payable {/*  */}
 
     function limiter(
         uint256 _userCredit
diff --git a/contracts/core/BaseUtils.sol b/contracts/core/BaseUtils.sol
index 30c3689..389e604 100644
--- a/contracts/core/BaseUtils.sol
+++ b/contracts/core/BaseUtils.sol
@@ -2,10 +2,15 @@
 pragma solidity 0.8.19;
 
 import { OwnerSettings } from "./OwnerSettings.sol";
+
 import { ECDSA } from "../lib/utils/ECDSA.sol";
 import { MerkleProofLib as Merkle } from "../lib/utils/MerkleProofLib.sol";
+import { ReentrancyGuard } from "../lib/utils/ReentrancyGuard.sol";
 
-abstract contract BaseUtils is OwnerSettings {
+abstract contract BaseUtils is
+    OwnerSettings,
+    ReentrancyGuard
+{
     /// ███ Storage ████████████████████████████████████████████████████████████
 
     /// @dev List of Pix transactions already signed.
@@ -67,26 +72,26 @@ abstract contract BaseUtils is OwnerSettings {
         ) revert AddressDenied();
     }
 
-    function _castToUint(
-        uint96 _amount,
-        uint160 _pixTarget,
+    function _castBool(
         bool _valid
-    )
-        internal
-        pure
-        returns (
-            uint256 _amountCasted,
-            uint256 _pixTargetCasted,
-            uint256 _validCasted
-        )
-    {
+    ) internal pure returns (uint256 _validCasted) {
         assembly {
-            _amountCasted := _amount
-            _pixTargetCasted := _pixTarget
             _validCasted := _valid
         }
     }
 
+    function getStr(
+        string memory str
+    ) public pure returns (bytes32 strEnc) {
+        bytes memory enc = bytes(abi.encodePacked(str));
+        assembly {
+            if lt(0x20, mload(enc)) {
+                invalid()
+            }
+            strEnc := mload(add(enc, 0x20))
+        }
+    }
+
     /// @notice Public method that handles `address`
     /// to `uint256` safe type casting.
     /// @dev Function sighash: 0x4b2ae980.
diff --git a/contracts/core/Constants.sol b/contracts/core/Constants.sol
index 85759f4..5022ccb 100644
--- a/contracts/core/Constants.sol
+++ b/contracts/core/Constants.sol
@@ -8,6 +8,8 @@ abstract contract Constants {
         0x0b294da292f26e55fd442b5c0164fbb9013036ff00c5cfdde0efd01c1baaf632;
     uint256 constant _ALLOWED_ERC20_UPDATED_EVENT_SIGNATURE =
         0x5d6e86e5341d57a92c49934296c51542a25015c9b1782a1c2722a940131c3d9a;
+    uint256 constant _TRUSTED_FORWARDER_UPDATED_EVENT_SIGNATURE =
+        0xbee55516e29d3969d3cb8eb01351eb3c52d06f9e2435bd5a8bfe3647e185df92;
 
     /// @dev Seller casted to key => Seller's allowlist merkleroot.
     /// mapping(uint256 => bytes32) public sellerAllowList;
@@ -18,12 +20,12 @@ abstract contract Constants {
 
     /// @dev `balance` max. value = 10**26.
     /// @dev `pixTarget` keys are restricted to 160 bits.
-    ///     mapping(uint256 => mapping(ERC20 => uint256)) public sellerBalance;
+    ///     mapping(uint256 => mapping(ERC20 => { `uint256`, `uint96` } )) public sellerBalance;
 
     /// @dev Bits layout:
+    /// `bytes32` [0...255] := pixTarget
     /// `uint96`  [0...94]   := balance
-    /// `uint160` [95...254] := pixTarget
-    /// `bool`    [255]       := valid
+    /// `bool`    [95]       := valid
 
     /// @dev Value in custom storage slot given by:
     ///     mstore(0x20, token)
@@ -34,12 +36,10 @@ abstract contract Constants {
 
     /// @dev The bitmask of `sellerBalance` entry.
     uint256 constant BITMASK_SB_ENTRY = (1 << 94) - 1;
-    /// @dev The bit position of `pixTarget` in `sellerBalance`.
-    uint256 constant BITPOS_PIXTARGET = 95;
     /// @dev The bit position of `valid` in `sellerBalance`.
-    uint256 constant BITPOS_VALID = 255;
+    uint256 constant BITPOS_VALID = 95;
     /// @dev The bitmask of all 256 bits of `sellerBalance` except for the last one.
-    uint256 constant BITMASK_VALID = (1 << 255) - 1;
+    // uint256 constant BITMASK_VALID = (1 << 255) - 1;
 
     /// @dev The scalar of BRZ token.
     uint256 constant WAD = 1e18;
diff --git a/contracts/core/DataTypes.sol b/contracts/core/DataTypes.sol
index 8db52ba..690ee3a 100644
--- a/contracts/core/DataTypes.sol
+++ b/contracts/core/DataTypes.sol
@@ -3,15 +3,13 @@ pragma solidity 0.8.19;
 
 library DataTypes {
     struct Lock {
-        uint80 amount;
-        uint160 pixTarget;
-        address token;
-        /// @dev Amount to be tranfered via PIX.
-        address buyerAddress;
         uint256 sellerKey;
         uint256 counter;
-        /// @dev If not paid at this block will be expired.
         uint256 expirationBlock;
+        bytes32 pixTarget;
+        uint80 amount;
+        address token;
+        address buyerAddress;
     }
 
     // prettier-ignore
diff --git a/contracts/core/EventAndErrors.sol b/contracts/core/EventAndErrors.sol
index 2f84431..6238d5e 100644
--- a/contracts/core/EventAndErrors.sol
+++ b/contracts/core/EventAndErrors.sol
@@ -57,6 +57,11 @@ interface EventAndErrors {
         address indexed token,
         bool indexed state
     );
+    /// @dev 0xbee55516e29d3969d3cb8eb01351eb3c52d06f9e2435bd5a8bfe3647e185df92
+    event TrustedForwarderUpdated(
+        address indexed forwarder, 
+        bool indexed state
+    );
     /// @dev 0xe127cf589a3879da0156d4a24f43b44f65cfa3570de594806b0bfa2fcf06884f
     event ReputationUpdated(address reputation);
     /// @dev 0x70fa43ca70216ad905ade86b9e650a691b2ce5a01980d0a81bdd8324141b8511
@@ -64,6 +69,7 @@ interface EventAndErrors {
     /// @dev 0x14a422d2412784a5749d03da98921fe468c98577b767851389a9f58ea5a363d7
     event ValidSignersUpdated(address[] signers);
 
+
     /// ███ Errors ████████████████████████████████████████████████████████████
 
     /// @dev Only seller could call this function.
diff --git a/contracts/core/OwnerSettings.sol b/contracts/core/OwnerSettings.sol
index 6c44980..5cd8043 100644
--- a/contracts/core/OwnerSettings.sol
+++ b/contracts/core/OwnerSettings.sol
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity 0.8.19;
 
+import { ERC2771Context as ERC2771 } from "../lib/metatx/ERC2771Context.sol";
 import { ERC20, SafeTransferLib } from "../lib/utils/SafeTransferLib.sol";
 import { IReputation } from "../lib/interfaces/IReputation.sol";
 import { EventAndErrors } from "./EventAndErrors.sol";
@@ -10,7 +11,8 @@ import { Owned } from "../lib/auth/Owned.sol";
 abstract contract OwnerSettings is
     Constants,
     EventAndErrors,
-    Owned(msg.sender)
+    Owned(msg.sender),
+    ERC2771
 {
     /// ███ Storage ████████████████████████████████████████████████████████████
 
@@ -40,6 +42,48 @@ abstract contract OwnerSettings is
 
     /// ███ Owner Only █████████████████████████████████████████████████████████
 
+    function setTrustedFowarders(
+        address[] memory forwarders,
+        bool[] memory states
+    ) external onlyOwner {
+        assembly {
+            // first 32 bytes eq to array's length
+            let fLen := mload(forwarders)
+            // halts execution if forwarders.length eq 0
+            if iszero(fLen) {
+                invalid()
+            }
+            // revert with `LengthMismatch()`
+            if iszero(eq(fLen, mload(states))) {
+                mstore(0x00, 0xff633a38)
+                revert(0x1c, 0x04)
+            }
+            let fLoc := add(forwarders, 0x20)
+            let sLoc := add(states, 0x20)
+            for {
+                let end := add(fLoc, shl(5, fLen))
+            } iszero(eq(fLoc, end)) {
+                fLoc := add(fLoc, 0x20)
+                sLoc := add(sLoc, 0x20)
+            } {
+                // cache hashmap entry in scratch space
+                mstore(0x20, isTrustedForwarder.slot)
+                mstore(0x00, mload(fLoc))
+                //  let mapSlot := keccak256(0x00, 0x40)
+                sstore(keccak256(0x00, 0x40), mload(sLoc))
+
+                // emit TrustedForwarderUpdated(address, bool)
+                log3(
+                    0,
+                    0,
+                    _TRUSTED_FORWARDER_UPDATED_EVENT_SIGNATURE,
+                    mload(fLoc),
+                    mload(sLoc)
+                )
+            }
+        }
+    }
+
     /// @dev Contract's underlying balance withdraw method.
     /// @dev Function sighash: 0x5fd8c710.
     function withdrawBalance() external onlyOwner {
diff --git a/contracts/lib/metatx/ERC2771Context.sol b/contracts/lib/metatx/ERC2771Context.sol
new file mode 100644
index 0000000..04c75c7
--- /dev/null
+++ b/contracts/lib/metatx/ERC2771Context.sol
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity >=0.8.4;
+
+/// @author OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
+/// (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol)
+
+/// @dev Provides information about the current execution context, including the
+/// sender of the transaction and its data. While these are generally available
+/// via msg.sender and msg.data, they should not be accessed in such a direct
+/// manner, since when dealing with meta-transactions the account sending and
+/// paying for execution may not be the actual sender (as far as an application
+/// is concerned).
+///
+/// This contract is only required for intermediate, library-like contracts.
+abstract contract Context {
+    function _msgSender()
+        internal
+        view
+        virtual
+        returns (address)
+    {
+        return msg.sender;
+    }
+
+    function _msgData()
+        internal
+        view
+        virtual
+        returns (bytes calldata)
+    {
+        return msg.data;
+    }
+}
+
+/// @author Modified from OpenZeppelin Contracts (last updated v4.7.0) (metatx/ERC2771Context.sol)
+/// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/metatx/ERC2771Context.sol
+
+/// @dev Context variant with ERC2771 support.
+abstract contract ERC2771Context is Context {
+    // address private immutable _trustedForwarder;
+    mapping(address => bool) public isTrustedForwarder;
+
+    /// @custom:oz-upgrades-unsafe-allow constructor
+    // constructor(address trustedForwarder) {
+    //     _trustedForwarder = trustedForwarder;
+    // }
+
+    function _msgSender()
+        internal
+        view
+        virtual
+        override
+        returns (address sender)
+    {
+        if (isTrustedForwarder[msg.sender]) {
+            // The assembly code is more direct than the Solidity version using `abi.decode`.
+            /// @solidity memory-safe-assembly
+            assembly {
+                sender := shr(
+                    96,
+                    calldataload(sub(calldatasize(), 20))
+                )
+            }
+        } else {
+            return super._msgSender();
+        }
+    }
+
+    function _isTrustedForwarder()
+        internal
+        view
+        returns (address _sender, uint256 _forwarder)
+    {
+        _sender = _msgSender();
+        _forwarder = (_sender != msg.sender)
+            ? uint256(1)
+            : uint256(0);
+    }
+
+    function _msgData()
+        internal
+        view
+        virtual
+        override
+        returns (bytes calldata)
+    {
+        if (isTrustedForwarder[msg.sender]) {
+            return msg.data[:msg.data.length - 20];
+        } else {
+            return super._msgData();
+        }
+    }
+}
diff --git a/contracts/p2pix.sol b/contracts/p2pix.sol
index 0c89f62..f98159e 100644
--- a/contracts/p2pix.sol
+++ b/contracts/p2pix.sol
@@ -11,11 +11,11 @@ pragma solidity 0.8.19;
 
 import { OwnerSettings, ERC20, SafeTransferLib } from "./core/OwnerSettings.sol";
 import { BaseUtils } from "./core/BaseUtils.sol";
-import { ReentrancyGuard } from "./lib/utils/ReentrancyGuard.sol";
 import { DataTypes as DT } from "./core/DataTypes.sol";
 
 
-contract P2PIX is BaseUtils, ReentrancyGuard {
+
+contract P2PIX is BaseUtils {
     // solhint-disable use-forbidden-name
     // solhint-disable no-inline-assembly
     // solhint-disable no-empty-blocks
@@ -62,19 +62,20 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
     function deposit(
         address _token,
         uint96 _amount,
-        uint160 _pixTarget,
+        string memory _pixTarget,
         bool _valid,
         bytes32 allowlistRoot
     ) public {
         ERC20 t = ERC20(_token);
         uint256 k = _castAddrToKey(msg.sender);
 
-        if (_pixTarget == 0) revert EmptyPixTarget();
+        if (bytes(_pixTarget).length == 0) revert EmptyPixTarget();
         if (!allowedERC20s(t)) revert TokenDenied();
-        uint256 _sellerBalance = sellerBalance(k,t);
+        uint256 _sellerBalance = __sellerBalance(k,t);
 
         uint256 currBal = _sellerBalance & BITMASK_SB_ENTRY;
-        if ((currBal + _amount) > MAXBALANCE_UPPERBOUND)
+        uint256 _newBal = uint256(currBal + _amount); 
+        if (_newBal > MAXBALANCE_UPPERBOUND)
             revert MaxBalExceeded();
 
         setReentrancyGuard();
@@ -83,21 +84,14 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
             setRoot(msg.sender, allowlistRoot);
         }
 
-        uint256 amountCasted;
-        uint256 pixTargetCasted;
-        uint256 validCasted;
-        (
-            amountCasted,
-            pixTargetCasted,
-            validCasted
-        ) = _castToUint(_amount, _pixTarget, _valid);
+        bytes32 pixTargetCasted = getStr(_pixTarget);
+        uint256 validCasted = _castBool(_valid);
 
         _setSellerBalance(
             k, 
             t, 
-            ((currBal + amountCasted) |
-            (pixTargetCasted << BITPOS_PIXTARGET) |
-            (validCasted << BITPOS_VALID))
+            (_newBal | (validCasted << BITPOS_VALID)),
+            pixTargetCasted
         );
 
         SafeTransferLib.safeTransferFrom(
@@ -118,19 +112,16 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
     /// @dev Function sighash: 0x72fada5c.
     function setValidState(ERC20 token, bool state) public {
         uint256 key = _castAddrToKey(msg.sender);
-        uint256 _sellerBalance = sellerBalance(key, token);
+        uint256 _sellerBalance = __sellerBalance(key, token);
 
         if (_sellerBalance != 0) {
-            uint256 _valid;
-            assembly {
-                _valid := state
-            }
+            uint256 _valid = _castBool(state);
 
             _sellerBalance =
-                (_sellerBalance & BITMASK_VALID) |
+                (_sellerBalance & BITMASK_SB_ENTRY) |
                 (_valid << BITPOS_VALID);
 
-            _setSellerBalance(key, token, _sellerBalance);
+            _setValidState(key, token, _sellerBalance);
 
             emit ValidSet(msg.sender, address(token), state);
         } else revert NotInitialized();
@@ -175,33 +166,43 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
             mapLocks[cCounter].expirationBlock >= block.number
         ) revert NotExpired();
 
+        address sender; uint256 forwarder;
+        (sender, forwarder) = _isTrustedForwarder();
+
         DT.Lock memory l = DT.Lock(
-            _amount,
-            uint160(sellerBalance(k, t) >> BITPOS_PIXTARGET),
-            address(t),
-            msg.sender,
             k,
             cCounter,
-            (block.number + defaultLockBlocks)
+            (block.number + defaultLockBlocks),
+            getPixTarget(_seller, t),
+            _amount,
+            address(t),
+            sender
         );
 
+        // transaction forwarding must leave `merkleProof` empty;
+        // otherwise, the trustedForwarder must be previously added 
+        // to a seller whitelist.
         if (merkleProof.length != 0) {
-            _merkleVerify(merkleProof, sellerAllowList(k), msg.sender);
+            _merkleVerify(merkleProof, sellerAllowList(k), sender);
             lockID = _addLock(bal, _amount, cCounter, l, t, k);
 
         } else {
             if (l.amount <= REPUTATION_LOWERBOUND) {
             lockID = _addLock(bal, _amount, cCounter, l, t, k);
 
+        } else {
+            if (forwarder != 0) {
+                lockID = _addLock(bal, _amount, cCounter, l, t, k);
         } else {
             uint256 userCredit = userRecord[_castAddrToKey(msg.sender)];
             uint256 spendLimit; (spendLimit) = _limiter(userCredit / WAD);
             if ( 
-                l.amount > (spendLimit * WAD) || l.amount > LOCKAMOUNT_UPPERBOUND 
+                l.amount > (spendLimit * WAD) || 
+                l.amount > LOCKAMOUNT_UPPERBOUND 
             ) revert AmountNotAllowed();
             lockID = _addLock(bal, _amount, cCounter, l, t, k);
 
-        /*  */}/*  */}
+        /*  */}/*  */}/*  */}
     }
 
     /// @notice Lock release method that liquidate lock
@@ -241,20 +242,23 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
 
         ERC20 t = ERC20(l.token);
 
-        // We cache values before zeroing them out.
+        // We cache lockAmount value before zeroing it out.
         uint256 lockAmount = l.amount;
-        // uint256 totalAmount = (lockAmount - l.relayerPremium);
 
         l.amount = 0;
         l.expirationBlock = 0;
         _setUsedTransactions(message);
 
+        address sender; uint256 forwarder;
+        (sender, forwarder) = _isTrustedForwarder();
+        
+        if (forwarder == 0) { 
         if (msg.sender != l.buyerAddress) {
             userRecord[_castAddrToKey(msg.sender)] += (lockAmount >> 1);
             userRecord[_castAddrToKey(l.buyerAddress)] += (lockAmount >> 1);
         } else {
             userRecord[_castAddrToKey(msg.sender)] += lockAmount;
-        }
+        }}
 
         SafeTransferLib.safeTransfer(
             t,
@@ -283,7 +287,7 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
             _notExpired(l);
 
             uint256 _sellerBalance = 
-            sellerBalance(l.sellerKey, ERC20(l.token)) & BITMASK_SB_ENTRY;
+            __sellerBalance(l.sellerKey, ERC20(l.token)) & BITMASK_SB_ENTRY;
 
             if ((_sellerBalance + l.amount) > MAXBALANCE_UPPERBOUND)
                 revert MaxBalExceeded();
@@ -335,7 +339,7 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
 
         uint256 key = _castAddrToKey(msg.sender);
         _decBal(
-            (sellerBalance(key, token) & BITMASK_SB_ENTRY),
+            (__sellerBalance(key, token) & BITMASK_SB_ENTRY),
             amount,
             token,
             key
@@ -407,7 +411,7 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
         mapLocks[_lockID] = _l;
 
         _decBal(_bal, _amount, _t, _k);
-        lockCounter++;
+        ++lockCounter;
         counter = _lockID;
 
         emit LockAdded(
@@ -448,9 +452,6 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
         view
         returns (uint256 bal)
     {
-        // bal =
-        // sellerBalance[_castAddrToKey(seller)][token] &
-        // BITMASK_SB_ENTRY;
         assembly {
             for {
                 /*  */
@@ -462,7 +463,7 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
                 mstore(0x00, seller)
                 bal := and(
                     BITMASK_SB_ENTRY,
-                    sload(keccak256(0x0c, 0x34))
+                    sload(add(keccak256(0x0c, 0x34), 0x01))
                 )
                 break
             }
@@ -474,10 +475,6 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
         view
         returns (bool valid)
     {
-        // uint256 b = sellerBalance[
-        // _castAddrToKey(seller)
-        // ][token];
-        // ] >> BITPOS_VALID) & BITMASK_SB_ENTRY;
         assembly {
             for {
                 /*  */
@@ -491,7 +488,7 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
                     BITMASK_SB_ENTRY,
                     shr(
                         BITPOS_VALID,
-                        sload(keccak256(0x0c, 0x34))
+                        sload(add(keccak256(0x0c, 0x34), 0x01))
                     )
                 )
                 break
@@ -502,12 +499,8 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
     function getPixTarget(address seller, ERC20 token)
         public
         view
-        returns (uint160 pixTarget)
+        returns (bytes32 pixTarget)
     {
-        // pixTarget = uint160(
-        // sellerBalance[_castAddrToKey(seller)][token] >>
-        // BITPOS_PIXTARGET
-        // );
         assembly {
             for {
                 /*  */
@@ -517,15 +510,17 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
                 mstore(0x20, token)
                 mstore(0x0c, _SELLER_BALANCE_SLOT_SEED)
                 mstore(0x00, seller)
-                pixTarget := shr(
-                    BITPOS_PIXTARGET,
-                    sload(keccak256(0x0c, 0x34))
-                )
+                pixTarget := sload(keccak256(0x0c, 0x34))
                 break
             }
         }
     }
 
+    function getPixTargetString(address seller, ERC20 token) public view returns (string memory pixTarget) {
+        bytes32 _pixEnc = getPixTarget(seller, token);
+        pixTarget =  string(abi.encodePacked(_pixEnc));
+    }
+
     function getBalances(
         address[] memory sellers,
         ERC20 token
@@ -593,42 +588,53 @@ contract P2PIX is BaseUtils, ReentrancyGuard {
         return (sortedIDs, status);
     }
 
-    function _setSellerBalance(uint256 sellerKey, ERC20 erc20, uint256 packed) private {
+    function _setSellerBalance(uint256 _sellerKey, ERC20 _erc20, uint256 _packed, bytes32 _pixTarget) private {
         assembly {
-            mstore(0x20, erc20)
+            mstore(0x20, _erc20)
             mstore(0x0c, _SELLER_BALANCE_SLOT_SEED)
-            mstore(0x00, shr(12, sellerKey))
-            sstore(keccak256(0x0c, 0x34), packed)
+            mstore(0x00, shr(12, _sellerKey))
+            let _loc := keccak256(0x0c, 0x34)
+            sstore(add(_loc, 0x01), _packed)
+            sstore(_loc, _pixTarget)
         }
     }
 
-    function _addSellerBalance(uint256 sellerKey, ERC20 erc20, uint256 amount) private {
+    function _setValidState(uint256 _sellerKey, ERC20 _erc20, uint256 _packed) private  {
         assembly {
-            mstore(0x20, erc20)
+            mstore(0x20, _erc20)
             mstore(0x0c, _SELLER_BALANCE_SLOT_SEED)
-            mstore(0x00, shr(12, sellerKey))
-            let slot := keccak256(0x0c, 0x34)
-            sstore(slot, add(sload(slot), amount))
+            mstore(0x00, shr(12, _sellerKey))
+            let _loc := keccak256(0x0c, 0x34)
+            sstore(add(_loc, 0x01), _packed)
         }
     }
 
-    function _decSellerBalance(uint256 sellerKey, ERC20 erc20, uint256 amount) private {
+    function _addSellerBalance(uint256 _sellerKey, ERC20 _erc20, uint256 _amount) private {
         assembly {
-            mstore(0x20, erc20)
+            mstore(0x20, _erc20)
             mstore(0x0c, _SELLER_BALANCE_SLOT_SEED)
-            mstore(0x00, shr(12, sellerKey))
-            let slot := keccak256(0x0c, 0x34)
-            sstore(slot, sub(sload(slot), amount))
+            mstore(0x00, shr(12, _sellerKey))
+            let _loc := add(keccak256(0x0c, 0x34), 0x01)
+            sstore(_loc, add(sload(_loc), _amount))
         }
     }
 
-    function sellerBalance(uint256 sellerKey, ERC20 erc20) public view returns(uint256 packed) {
+    function _decSellerBalance(uint256 _sellerKey, ERC20 _erc20, uint256 _amount) private {
         assembly {
-            mstore(0x20, erc20)
+            mstore(0x20, _erc20)
             mstore(0x0c, _SELLER_BALANCE_SLOT_SEED)
-            mstore(0x00, shr(12, sellerKey))
-            packed := sload(keccak256(0x0c, 0x34))
+            mstore(0x00, shr(12, _sellerKey))
+            let _loc := add(keccak256(0x0c, 0x34), 0x01)
+            sstore(_loc, sub(sload(_loc), _amount))
+        }
+    }
 
+    function __sellerBalance(uint256 _sellerKey, ERC20 _erc20) private view returns(uint256 _packed) {
+        assembly {
+            mstore(0x20, _erc20)
+            mstore(0x0c, _SELLER_BALANCE_SLOT_SEED)
+            mstore(0x00, shr(12, _sellerKey))
+            _packed := sload(add(keccak256(0x0c, 0x34), 0x01))
         }
     }
 
diff --git a/src/types/core/BaseUtils.ts b/src/types/core/BaseUtils.ts
index dfc18cd..950cc5a 100644
--- a/src/types/core/BaseUtils.ts
+++ b/src/types/core/BaseUtils.ts
@@ -33,12 +33,15 @@ export interface BaseUtilsInterface extends utils.Interface {
     "_castKeyToAddr(uint256)": FunctionFragment;
     "allowedERC20s(address)": FunctionFragment;
     "defaultLockBlocks()": FunctionFragment;
+    "getStr(string)": FunctionFragment;
+    "isTrustedForwarder(address)": FunctionFragment;
     "owner()": FunctionFragment;
     "reputation()": FunctionFragment;
     "sellerAllowList(uint256)": FunctionFragment;
     "setDefaultLockBlocks(uint256)": FunctionFragment;
     "setOwner(address)": FunctionFragment;
     "setReputation(address)": FunctionFragment;
+    "setTrustedFowarders(address[],bool[])": FunctionFragment;
     "setValidSigners(address[])": FunctionFragment;
     "tokenSettings(address[],bool[])": FunctionFragment;
     "usedTransactions(bytes32)": FunctionFragment;
@@ -52,12 +55,15 @@ export interface BaseUtilsInterface extends utils.Interface {
       | "_castKeyToAddr"
       | "allowedERC20s"
       | "defaultLockBlocks"
+      | "getStr"
+      | "isTrustedForwarder"
       | "owner"
       | "reputation"
       | "sellerAllowList"
       | "setDefaultLockBlocks"
       | "setOwner"
       | "setReputation"
+      | "setTrustedFowarders"
       | "setValidSigners"
       | "tokenSettings"
       | "usedTransactions"
@@ -81,6 +87,14 @@ export interface BaseUtilsInterface extends utils.Interface {
     functionFragment: "defaultLockBlocks",
     values?: undefined
   ): string;
+  encodeFunctionData(
+    functionFragment: "getStr",
+    values: [PromiseOrValue<string>]
+  ): string;
+  encodeFunctionData(
+    functionFragment: "isTrustedForwarder",
+    values: [PromiseOrValue<string>]
+  ): string;
   encodeFunctionData(functionFragment: "owner", values?: undefined): string;
   encodeFunctionData(
     functionFragment: "reputation",
@@ -102,6 +116,10 @@ export interface BaseUtilsInterface extends utils.Interface {
     functionFragment: "setReputation",
     values: [PromiseOrValue<string>]
   ): string;
+  encodeFunctionData(
+    functionFragment: "setTrustedFowarders",
+    values: [PromiseOrValue<string>[], PromiseOrValue<boolean>[]]
+  ): string;
   encodeFunctionData(
     functionFragment: "setValidSigners",
     values: [PromiseOrValue<string>[]]
@@ -139,6 +157,11 @@ export interface BaseUtilsInterface extends utils.Interface {
     functionFragment: "defaultLockBlocks",
     data: BytesLike
   ): Result;
+  decodeFunctionResult(functionFragment: "getStr", data: BytesLike): Result;
+  decodeFunctionResult(
+    functionFragment: "isTrustedForwarder",
+    data: BytesLike
+  ): Result;
   decodeFunctionResult(functionFragment: "owner", data: BytesLike): Result;
   decodeFunctionResult(functionFragment: "reputation", data: BytesLike): Result;
   decodeFunctionResult(
@@ -154,6 +177,10 @@ export interface BaseUtilsInterface extends utils.Interface {
     functionFragment: "setReputation",
     data: BytesLike
   ): Result;
+  decodeFunctionResult(
+    functionFragment: "setTrustedFowarders",
+    data: BytesLike
+  ): Result;
   decodeFunctionResult(
     functionFragment: "setValidSigners",
     data: BytesLike
@@ -187,6 +214,7 @@ export interface BaseUtilsInterface extends utils.Interface {
     "OwnerUpdated(address,address)": EventFragment;
     "ReputationUpdated(address)": EventFragment;
     "RootUpdated(address,bytes32)": EventFragment;
+    "TrustedForwarderUpdated(address,bool)": EventFragment;
     "ValidSet(address,address,bool)": EventFragment;
     "ValidSignersUpdated(address[])": EventFragment;
   };
@@ -202,6 +230,7 @@ export interface BaseUtilsInterface extends utils.Interface {
   getEvent(nameOrSignatureOrTopic: "OwnerUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ReputationUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "RootUpdated"): EventFragment;
+  getEvent(nameOrSignatureOrTopic: "TrustedForwarderUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSet"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSignersUpdated"): EventFragment;
 }
@@ -334,6 +363,18 @@ export type RootUpdatedEvent = TypedEvent<
 
 export type RootUpdatedEventFilter = TypedEventFilter<RootUpdatedEvent>;
 
+export interface TrustedForwarderUpdatedEventObject {
+  forwarder: string;
+  state: boolean;
+}
+export type TrustedForwarderUpdatedEvent = TypedEvent<
+  [string, boolean],
+  TrustedForwarderUpdatedEventObject
+>;
+
+export type TrustedForwarderUpdatedEventFilter =
+  TypedEventFilter<TrustedForwarderUpdatedEvent>;
+
 export interface ValidSetEventObject {
   seller: string;
   token: string;
@@ -401,6 +442,16 @@ export interface BaseUtils extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<[BigNumber]>;
 
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<[string] & { strEnc: string }>;
+
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<[boolean]>;
+
     owner(overrides?: CallOverrides): Promise<[string]>;
 
     reputation(overrides?: CallOverrides): Promise<[string]>;
@@ -425,6 +476,12 @@ export interface BaseUtils extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<ContractTransaction>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<ContractTransaction>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -468,6 +525,16 @@ export interface BaseUtils extends BaseContract {
 
   defaultLockBlocks(overrides?: CallOverrides): Promise<BigNumber>;
 
+  getStr(
+    str: PromiseOrValue<string>,
+    overrides?: CallOverrides
+  ): Promise<string>;
+
+  isTrustedForwarder(
+    arg0: PromiseOrValue<string>,
+    overrides?: CallOverrides
+  ): Promise<boolean>;
+
   owner(overrides?: CallOverrides): Promise<string>;
 
   reputation(overrides?: CallOverrides): Promise<string>;
@@ -492,6 +559,12 @@ export interface BaseUtils extends BaseContract {
     overrides?: Overrides & { from?: PromiseOrValue<string> }
   ): Promise<ContractTransaction>;
 
+  setTrustedFowarders(
+    forwarders: PromiseOrValue<string>[],
+    states: PromiseOrValue<boolean>[],
+    overrides?: Overrides & { from?: PromiseOrValue<string> }
+  ): Promise<ContractTransaction>;
+
   setValidSigners(
     _validSigners: PromiseOrValue<string>[],
     overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -535,6 +608,16 @@ export interface BaseUtils extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<BigNumber>;
 
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<string>;
+
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<boolean>;
+
     owner(overrides?: CallOverrides): Promise<string>;
 
     reputation(overrides?: CallOverrides): Promise<string>;
@@ -559,6 +642,12 @@ export interface BaseUtils extends BaseContract {
       overrides?: CallOverrides
     ): Promise<void>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: CallOverrides
+    ): Promise<void>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: CallOverrides
@@ -680,6 +769,15 @@ export interface BaseUtils extends BaseContract {
       merkleRoot?: PromiseOrValue<BytesLike> | null
     ): RootUpdatedEventFilter;
 
+    "TrustedForwarderUpdated(address,bool)"(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+    TrustedForwarderUpdated(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+
     "ValidSet(address,address,bool)"(
       seller?: PromiseOrValue<string> | null,
       token?: null,
@@ -715,6 +813,16 @@ export interface BaseUtils extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<BigNumber>;
 
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<BigNumber>;
+
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<BigNumber>;
+
     owner(overrides?: CallOverrides): Promise<BigNumber>;
 
     reputation(overrides?: CallOverrides): Promise<BigNumber>;
@@ -739,6 +847,12 @@ export interface BaseUtils extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<BigNumber>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<BigNumber>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -783,6 +897,16 @@ export interface BaseUtils extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<PopulatedTransaction>;
 
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+
     owner(overrides?: CallOverrides): Promise<PopulatedTransaction>;
 
     reputation(overrides?: CallOverrides): Promise<PopulatedTransaction>;
@@ -807,6 +931,12 @@ export interface BaseUtils extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<PopulatedTransaction>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<PopulatedTransaction>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
diff --git a/src/types/core/EventAndErrors.ts b/src/types/core/EventAndErrors.ts
index 37b5097..b988e9a 100644
--- a/src/types/core/EventAndErrors.ts
+++ b/src/types/core/EventAndErrors.ts
@@ -33,6 +33,7 @@ export interface EventAndErrorsInterface extends utils.Interface {
     "LockReturned(address,uint256)": EventFragment;
     "ReputationUpdated(address)": EventFragment;
     "RootUpdated(address,bytes32)": EventFragment;
+    "TrustedForwarderUpdated(address,bool)": EventFragment;
     "ValidSet(address,address,bool)": EventFragment;
     "ValidSignersUpdated(address[])": EventFragment;
   };
@@ -47,6 +48,7 @@ export interface EventAndErrorsInterface extends utils.Interface {
   getEvent(nameOrSignatureOrTopic: "LockReturned"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ReputationUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "RootUpdated"): EventFragment;
+  getEvent(nameOrSignatureOrTopic: "TrustedForwarderUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSet"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSignersUpdated"): EventFragment;
 }
@@ -168,6 +170,18 @@ export type RootUpdatedEvent = TypedEvent<
 
 export type RootUpdatedEventFilter = TypedEventFilter<RootUpdatedEvent>;
 
+export interface TrustedForwarderUpdatedEventObject {
+  forwarder: string;
+  state: boolean;
+}
+export type TrustedForwarderUpdatedEvent = TypedEvent<
+  [string, boolean],
+  TrustedForwarderUpdatedEventObject
+>;
+
+export type TrustedForwarderUpdatedEventFilter =
+  TypedEventFilter<TrustedForwarderUpdatedEvent>;
+
 export interface ValidSetEventObject {
   seller: string;
   token: string;
@@ -309,6 +323,15 @@ export interface EventAndErrors extends BaseContract {
       merkleRoot?: PromiseOrValue<BytesLike> | null
     ): RootUpdatedEventFilter;
 
+    "TrustedForwarderUpdated(address,bool)"(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+    TrustedForwarderUpdated(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+
     "ValidSet(address,address,bool)"(
       seller?: PromiseOrValue<string> | null,
       token?: null,
diff --git a/src/types/core/OwnerSettings.ts b/src/types/core/OwnerSettings.ts
index 3437ba9..e75e6b7 100644
--- a/src/types/core/OwnerSettings.ts
+++ b/src/types/core/OwnerSettings.ts
@@ -31,12 +31,14 @@ export interface OwnerSettingsInterface extends utils.Interface {
   functions: {
     "allowedERC20s(address)": FunctionFragment;
     "defaultLockBlocks()": FunctionFragment;
+    "isTrustedForwarder(address)": FunctionFragment;
     "owner()": FunctionFragment;
     "reputation()": FunctionFragment;
     "sellerAllowList(uint256)": FunctionFragment;
     "setDefaultLockBlocks(uint256)": FunctionFragment;
     "setOwner(address)": FunctionFragment;
     "setReputation(address)": FunctionFragment;
+    "setTrustedFowarders(address[],bool[])": FunctionFragment;
     "setValidSigners(address[])": FunctionFragment;
     "tokenSettings(address[],bool[])": FunctionFragment;
     "validBacenSigners(uint256)": FunctionFragment;
@@ -47,12 +49,14 @@ export interface OwnerSettingsInterface extends utils.Interface {
     nameOrSignatureOrTopic:
       | "allowedERC20s"
       | "defaultLockBlocks"
+      | "isTrustedForwarder"
       | "owner"
       | "reputation"
       | "sellerAllowList"
       | "setDefaultLockBlocks"
       | "setOwner"
       | "setReputation"
+      | "setTrustedFowarders"
       | "setValidSigners"
       | "tokenSettings"
       | "validBacenSigners"
@@ -67,6 +71,10 @@ export interface OwnerSettingsInterface extends utils.Interface {
     functionFragment: "defaultLockBlocks",
     values?: undefined
   ): string;
+  encodeFunctionData(
+    functionFragment: "isTrustedForwarder",
+    values: [PromiseOrValue<string>]
+  ): string;
   encodeFunctionData(functionFragment: "owner", values?: undefined): string;
   encodeFunctionData(
     functionFragment: "reputation",
@@ -88,6 +96,10 @@ export interface OwnerSettingsInterface extends utils.Interface {
     functionFragment: "setReputation",
     values: [PromiseOrValue<string>]
   ): string;
+  encodeFunctionData(
+    functionFragment: "setTrustedFowarders",
+    values: [PromiseOrValue<string>[], PromiseOrValue<boolean>[]]
+  ): string;
   encodeFunctionData(
     functionFragment: "setValidSigners",
     values: [PromiseOrValue<string>[]]
@@ -113,6 +125,10 @@ export interface OwnerSettingsInterface extends utils.Interface {
     functionFragment: "defaultLockBlocks",
     data: BytesLike
   ): Result;
+  decodeFunctionResult(
+    functionFragment: "isTrustedForwarder",
+    data: BytesLike
+  ): Result;
   decodeFunctionResult(functionFragment: "owner", data: BytesLike): Result;
   decodeFunctionResult(functionFragment: "reputation", data: BytesLike): Result;
   decodeFunctionResult(
@@ -128,6 +144,10 @@ export interface OwnerSettingsInterface extends utils.Interface {
     functionFragment: "setReputation",
     data: BytesLike
   ): Result;
+  decodeFunctionResult(
+    functionFragment: "setTrustedFowarders",
+    data: BytesLike
+  ): Result;
   decodeFunctionResult(
     functionFragment: "setValidSigners",
     data: BytesLike
@@ -157,6 +177,7 @@ export interface OwnerSettingsInterface extends utils.Interface {
     "OwnerUpdated(address,address)": EventFragment;
     "ReputationUpdated(address)": EventFragment;
     "RootUpdated(address,bytes32)": EventFragment;
+    "TrustedForwarderUpdated(address,bool)": EventFragment;
     "ValidSet(address,address,bool)": EventFragment;
     "ValidSignersUpdated(address[])": EventFragment;
   };
@@ -172,6 +193,7 @@ export interface OwnerSettingsInterface extends utils.Interface {
   getEvent(nameOrSignatureOrTopic: "OwnerUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ReputationUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "RootUpdated"): EventFragment;
+  getEvent(nameOrSignatureOrTopic: "TrustedForwarderUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSet"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSignersUpdated"): EventFragment;
 }
@@ -304,6 +326,18 @@ export type RootUpdatedEvent = TypedEvent<
 
 export type RootUpdatedEventFilter = TypedEventFilter<RootUpdatedEvent>;
 
+export interface TrustedForwarderUpdatedEventObject {
+  forwarder: string;
+  state: boolean;
+}
+export type TrustedForwarderUpdatedEvent = TypedEvent<
+  [string, boolean],
+  TrustedForwarderUpdatedEventObject
+>;
+
+export type TrustedForwarderUpdatedEventFilter =
+  TypedEventFilter<TrustedForwarderUpdatedEvent>;
+
 export interface ValidSetEventObject {
   seller: string;
   token: string;
@@ -361,6 +395,11 @@ export interface OwnerSettings extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<[BigNumber]>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<[boolean]>;
+
     owner(overrides?: CallOverrides): Promise<[string]>;
 
     reputation(overrides?: CallOverrides): Promise<[string]>;
@@ -385,6 +424,12 @@ export interface OwnerSettings extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<ContractTransaction>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<ContractTransaction>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -413,6 +458,11 @@ export interface OwnerSettings extends BaseContract {
 
   defaultLockBlocks(overrides?: CallOverrides): Promise<BigNumber>;
 
+  isTrustedForwarder(
+    arg0: PromiseOrValue<string>,
+    overrides?: CallOverrides
+  ): Promise<boolean>;
+
   owner(overrides?: CallOverrides): Promise<string>;
 
   reputation(overrides?: CallOverrides): Promise<string>;
@@ -437,6 +487,12 @@ export interface OwnerSettings extends BaseContract {
     overrides?: Overrides & { from?: PromiseOrValue<string> }
   ): Promise<ContractTransaction>;
 
+  setTrustedFowarders(
+    forwarders: PromiseOrValue<string>[],
+    states: PromiseOrValue<boolean>[],
+    overrides?: Overrides & { from?: PromiseOrValue<string> }
+  ): Promise<ContractTransaction>;
+
   setValidSigners(
     _validSigners: PromiseOrValue<string>[],
     overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -465,6 +521,11 @@ export interface OwnerSettings extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<BigNumber>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<boolean>;
+
     owner(overrides?: CallOverrides): Promise<string>;
 
     reputation(overrides?: CallOverrides): Promise<string>;
@@ -489,6 +550,12 @@ export interface OwnerSettings extends BaseContract {
       overrides?: CallOverrides
     ): Promise<void>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: CallOverrides
+    ): Promise<void>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: CallOverrides
@@ -605,6 +672,15 @@ export interface OwnerSettings extends BaseContract {
       merkleRoot?: PromiseOrValue<BytesLike> | null
     ): RootUpdatedEventFilter;
 
+    "TrustedForwarderUpdated(address,bool)"(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+    TrustedForwarderUpdated(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+
     "ValidSet(address,address,bool)"(
       seller?: PromiseOrValue<string> | null,
       token?: null,
@@ -630,6 +706,11 @@ export interface OwnerSettings extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<BigNumber>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<BigNumber>;
+
     owner(overrides?: CallOverrides): Promise<BigNumber>;
 
     reputation(overrides?: CallOverrides): Promise<BigNumber>;
@@ -654,6 +735,12 @@ export interface OwnerSettings extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<BigNumber>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<BigNumber>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -683,6 +770,11 @@ export interface OwnerSettings extends BaseContract {
 
     defaultLockBlocks(overrides?: CallOverrides): Promise<PopulatedTransaction>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+
     owner(overrides?: CallOverrides): Promise<PopulatedTransaction>;
 
     reputation(overrides?: CallOverrides): Promise<PopulatedTransaction>;
@@ -707,6 +799,12 @@ export interface OwnerSettings extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<PopulatedTransaction>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<PopulatedTransaction>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
diff --git a/src/types/factories/Reputation__factory.ts b/src/types/factories/Reputation__factory.ts
index 1903d03..ba1d7b6 100644
--- a/src/types/factories/Reputation__factory.ts
+++ b/src/types/factories/Reputation__factory.ts
@@ -1,7 +1,13 @@
 /* Autogenerated file. Do not edit manually. */
 /* tslint:disable */
 /* eslint-disable */
-import { Signer, utils, Contract, ContractFactory, Overrides } from "ethers";
+import {
+  Signer,
+  utils,
+  Contract,
+  ContractFactory,
+  PayableOverrides,
+} from "ethers";
 import type { Provider, TransactionRequest } from "@ethersproject/providers";
 import type { PromiseOrValue } from "../common";
 import type { Reputation, ReputationInterface } from "../Reputation";
@@ -9,7 +15,7 @@ import type { Reputation, ReputationInterface } from "../Reputation";
 const _abi = [
   {
     inputs: [],
-    stateMutability: "nonpayable",
+    stateMutability: "payable",
     type: "constructor",
   },
   {
@@ -60,7 +66,7 @@ const _abi = [
 ];
 
 const _bytecode =
-  "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";
+  "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";
 
 type ReputationConstructorParams =
   | [signer?: Signer]
@@ -80,12 +86,12 @@ export class Reputation__factory extends ContractFactory {
   }
 
   override deploy(
-    overrides?: Overrides & { from?: PromiseOrValue<string> }
+    overrides?: PayableOverrides & { from?: PromiseOrValue<string> }
   ): Promise<Reputation> {
     return super.deploy(overrides || {}) as Promise<Reputation>;
   }
   override getDeployTransaction(
-    overrides?: Overrides & { from?: PromiseOrValue<string> }
+    overrides?: PayableOverrides & { from?: PromiseOrValue<string> }
   ): TransactionRequest {
     return super.getDeployTransaction(overrides || {});
   }
diff --git a/src/types/factories/core/BaseUtils__factory.ts b/src/types/factories/core/BaseUtils__factory.ts
index 6bcc05c..864435a 100644
--- a/src/types/factories/core/BaseUtils__factory.ts
+++ b/src/types/factories/core/BaseUtils__factory.ts
@@ -87,6 +87,11 @@ const _abi = [
     name: "OnlySeller",
     type: "error",
   },
+  {
+    inputs: [],
+    name: "Reentrancy",
+    type: "error",
+  },
   {
     inputs: [],
     name: "StaticCallFailed",
@@ -334,6 +339,25 @@ const _abi = [
     name: "RootUpdated",
     type: "event",
   },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        internalType: "address",
+        name: "forwarder",
+        type: "address",
+      },
+      {
+        indexed: true,
+        internalType: "bool",
+        name: "state",
+        type: "bool",
+      },
+    ],
+    name: "TrustedForwarderUpdated",
+    type: "event",
+  },
   {
     anonymous: false,
     inputs: [
@@ -442,6 +466,44 @@ const _abi = [
     stateMutability: "view",
     type: "function",
   },
+  {
+    inputs: [
+      {
+        internalType: "string",
+        name: "str",
+        type: "string",
+      },
+    ],
+    name: "getStr",
+    outputs: [
+      {
+        internalType: "bytes32",
+        name: "strEnc",
+        type: "bytes32",
+      },
+    ],
+    stateMutability: "pure",
+    type: "function",
+  },
+  {
+    inputs: [
+      {
+        internalType: "address",
+        name: "",
+        type: "address",
+      },
+    ],
+    name: "isTrustedForwarder",
+    outputs: [
+      {
+        internalType: "bool",
+        name: "",
+        type: "bool",
+      },
+    ],
+    stateMutability: "view",
+    type: "function",
+  },
   {
     inputs: [],
     name: "owner",
@@ -526,6 +588,24 @@ const _abi = [
     stateMutability: "nonpayable",
     type: "function",
   },
+  {
+    inputs: [
+      {
+        internalType: "address[]",
+        name: "forwarders",
+        type: "address[]",
+      },
+      {
+        internalType: "bool[]",
+        name: "states",
+        type: "bool[]",
+      },
+    ],
+    name: "setTrustedFowarders",
+    outputs: [],
+    stateMutability: "nonpayable",
+    type: "function",
+  },
   {
     inputs: [
       {
diff --git a/src/types/factories/core/EventAndErrors__factory.ts b/src/types/factories/core/EventAndErrors__factory.ts
index 404b45b..9039b98 100644
--- a/src/types/factories/core/EventAndErrors__factory.ts
+++ b/src/types/factories/core/EventAndErrors__factory.ts
@@ -313,6 +313,25 @@ const _abi = [
     name: "RootUpdated",
     type: "event",
   },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        internalType: "address",
+        name: "forwarder",
+        type: "address",
+      },
+      {
+        indexed: true,
+        internalType: "bool",
+        name: "state",
+        type: "bool",
+      },
+    ],
+    name: "TrustedForwarderUpdated",
+    type: "event",
+  },
   {
     anonymous: false,
     inputs: [
diff --git a/src/types/factories/core/OwnerSettings__factory.ts b/src/types/factories/core/OwnerSettings__factory.ts
index bfe7567..0ce0e26 100644
--- a/src/types/factories/core/OwnerSettings__factory.ts
+++ b/src/types/factories/core/OwnerSettings__factory.ts
@@ -337,6 +337,25 @@ const _abi = [
     name: "RootUpdated",
     type: "event",
   },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        internalType: "address",
+        name: "forwarder",
+        type: "address",
+      },
+      {
+        indexed: true,
+        internalType: "bool",
+        name: "state",
+        type: "bool",
+      },
+    ],
+    name: "TrustedForwarderUpdated",
+    type: "event",
+  },
   {
     anonymous: false,
     inputs: [
@@ -407,6 +426,25 @@ const _abi = [
     stateMutability: "view",
     type: "function",
   },
+  {
+    inputs: [
+      {
+        internalType: "address",
+        name: "",
+        type: "address",
+      },
+    ],
+    name: "isTrustedForwarder",
+    outputs: [
+      {
+        internalType: "bool",
+        name: "",
+        type: "bool",
+      },
+    ],
+    stateMutability: "view",
+    type: "function",
+  },
   {
     inputs: [],
     name: "owner",
@@ -491,6 +529,24 @@ const _abi = [
     stateMutability: "nonpayable",
     type: "function",
   },
+  {
+    inputs: [
+      {
+        internalType: "address[]",
+        name: "forwarders",
+        type: "address[]",
+      },
+      {
+        internalType: "bool[]",
+        name: "states",
+        type: "bool[]",
+      },
+    ],
+    name: "setTrustedFowarders",
+    outputs: [],
+    stateMutability: "nonpayable",
+    type: "function",
+  },
   {
     inputs: [
       {
diff --git a/src/types/factories/lib/index.ts b/src/types/factories/lib/index.ts
index 3b6ecbf..3ea6176 100644
--- a/src/types/factories/lib/index.ts
+++ b/src/types/factories/lib/index.ts
@@ -3,6 +3,7 @@
 /* eslint-disable */
 export * as auth from "./auth";
 export * as interfaces from "./interfaces";
+export * as metatx from "./metatx";
 export * as mock from "./mock";
 export * as tokens from "./tokens";
 export * as utils from "./utils";
diff --git a/src/types/factories/lib/metatx/ERC2771Context__factory.ts b/src/types/factories/lib/metatx/ERC2771Context__factory.ts
new file mode 100644
index 0000000..8503166
--- /dev/null
+++ b/src/types/factories/lib/metatx/ERC2771Context__factory.ts
@@ -0,0 +1,45 @@
+/* Autogenerated file. Do not edit manually. */
+/* tslint:disable */
+/* eslint-disable */
+
+import { Contract, Signer, utils } from "ethers";
+import type { Provider } from "@ethersproject/providers";
+import type {
+  ERC2771Context,
+  ERC2771ContextInterface,
+} from "../../../lib/metatx/ERC2771Context";
+
+const _abi = [
+  {
+    inputs: [
+      {
+        internalType: "address",
+        name: "",
+        type: "address",
+      },
+    ],
+    name: "isTrustedForwarder",
+    outputs: [
+      {
+        internalType: "bool",
+        name: "",
+        type: "bool",
+      },
+    ],
+    stateMutability: "view",
+    type: "function",
+  },
+];
+
+export class ERC2771Context__factory {
+  static readonly abi = _abi;
+  static createInterface(): ERC2771ContextInterface {
+    return new utils.Interface(_abi) as ERC2771ContextInterface;
+  }
+  static connect(
+    address: string,
+    signerOrProvider: Signer | Provider
+  ): ERC2771Context {
+    return new Contract(address, _abi, signerOrProvider) as ERC2771Context;
+  }
+}
diff --git a/src/types/factories/lib/metatx/index.ts b/src/types/factories/lib/metatx/index.ts
new file mode 100644
index 0000000..47f15ea
--- /dev/null
+++ b/src/types/factories/lib/metatx/index.ts
@@ -0,0 +1,4 @@
+/* Autogenerated file. Do not edit manually. */
+/* tslint:disable */
+/* eslint-disable */
+export { ERC2771Context__factory } from "./ERC2771Context__factory";
diff --git a/src/types/factories/p2pix.sol/P2PIX__factory.ts b/src/types/factories/p2pix.sol/P2PIX__factory.ts
index 6c22f29..a5637b4 100644
--- a/src/types/factories/p2pix.sol/P2PIX__factory.ts
+++ b/src/types/factories/p2pix.sol/P2PIX__factory.ts
@@ -377,6 +377,25 @@ const _abi = [
     name: "RootUpdated",
     type: "event",
   },
+  {
+    anonymous: false,
+    inputs: [
+      {
+        indexed: true,
+        internalType: "address",
+        name: "forwarder",
+        type: "address",
+      },
+      {
+        indexed: true,
+        internalType: "bool",
+        name: "state",
+        type: "bool",
+      },
+    ],
+    name: "TrustedForwarderUpdated",
+    type: "event",
+  },
   {
     anonymous: false,
     inputs: [
@@ -498,9 +517,9 @@ const _abi = [
         type: "uint96",
       },
       {
-        internalType: "uint160",
+        internalType: "string",
         name: "_pixTarget",
-        type: "uint160",
+        type: "string",
       },
       {
         internalType: "bool",
@@ -606,14 +625,57 @@ const _abi = [
     name: "getPixTarget",
     outputs: [
       {
-        internalType: "uint160",
+        internalType: "bytes32",
         name: "pixTarget",
-        type: "uint160",
+        type: "bytes32",
       },
     ],
     stateMutability: "view",
     type: "function",
   },
+  {
+    inputs: [
+      {
+        internalType: "address",
+        name: "seller",
+        type: "address",
+      },
+      {
+        internalType: "contract ERC20",
+        name: "token",
+        type: "address",
+      },
+    ],
+    name: "getPixTargetString",
+    outputs: [
+      {
+        internalType: "string",
+        name: "pixTarget",
+        type: "string",
+      },
+    ],
+    stateMutability: "view",
+    type: "function",
+  },
+  {
+    inputs: [
+      {
+        internalType: "string",
+        name: "str",
+        type: "string",
+      },
+    ],
+    name: "getStr",
+    outputs: [
+      {
+        internalType: "bytes32",
+        name: "strEnc",
+        type: "bytes32",
+      },
+    ],
+    stateMutability: "pure",
+    type: "function",
+  },
   {
     inputs: [
       {
@@ -638,6 +700,25 @@ const _abi = [
     stateMutability: "view",
     type: "function",
   },
+  {
+    inputs: [
+      {
+        internalType: "address",
+        name: "",
+        type: "address",
+      },
+    ],
+    name: "isTrustedForwarder",
+    outputs: [
+      {
+        internalType: "bool",
+        name: "",
+        type: "bool",
+      },
+    ],
+    stateMutability: "view",
+    type: "function",
+  },
   {
     inputs: [
       {
@@ -700,26 +781,6 @@ const _abi = [
     ],
     name: "mapLocks",
     outputs: [
-      {
-        internalType: "uint80",
-        name: "amount",
-        type: "uint80",
-      },
-      {
-        internalType: "uint160",
-        name: "pixTarget",
-        type: "uint160",
-      },
-      {
-        internalType: "address",
-        name: "token",
-        type: "address",
-      },
-      {
-        internalType: "address",
-        name: "buyerAddress",
-        type: "address",
-      },
       {
         internalType: "uint256",
         name: "sellerKey",
@@ -735,6 +796,26 @@ const _abi = [
         name: "expirationBlock",
         type: "uint256",
       },
+      {
+        internalType: "bytes32",
+        name: "pixTarget",
+        type: "bytes32",
+      },
+      {
+        internalType: "uint80",
+        name: "amount",
+        type: "uint80",
+      },
+      {
+        internalType: "address",
+        name: "token",
+        type: "address",
+      },
+      {
+        internalType: "address",
+        name: "buyerAddress",
+        type: "address",
+      },
     ],
     stateMutability: "view",
     type: "function",
@@ -817,30 +898,6 @@ const _abi = [
     stateMutability: "view",
     type: "function",
   },
-  {
-    inputs: [
-      {
-        internalType: "uint256",
-        name: "sellerKey",
-        type: "uint256",
-      },
-      {
-        internalType: "contract ERC20",
-        name: "erc20",
-        type: "address",
-      },
-    ],
-    name: "sellerBalance",
-    outputs: [
-      {
-        internalType: "uint256",
-        name: "packed",
-        type: "uint256",
-      },
-    ],
-    stateMutability: "view",
-    type: "function",
-  },
   {
     inputs: [
       {
@@ -898,6 +955,24 @@ const _abi = [
     stateMutability: "nonpayable",
     type: "function",
   },
+  {
+    inputs: [
+      {
+        internalType: "address[]",
+        name: "forwarders",
+        type: "address[]",
+      },
+      {
+        internalType: "bool[]",
+        name: "states",
+        type: "bool[]",
+      },
+    ],
+    name: "setTrustedFowarders",
+    outputs: [],
+    stateMutability: "nonpayable",
+    type: "function",
+  },
   {
     inputs: [
       {
@@ -1054,7 +1129,7 @@ const _abi = [
 ];
 
 const _bytecode =
-  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
 type P2PIXConstructorParams =
   | [signer?: Signer]
diff --git a/src/types/hardhat.d.ts b/src/types/hardhat.d.ts
index 20159f7..76d0a09 100644
--- a/src/types/hardhat.d.ts
+++ b/src/types/hardhat.d.ts
@@ -32,6 +32,10 @@ declare module "hardhat/types/runtime" {
       name: "IReputation",
       signerOrOptions?: ethers.Signer | FactoryOptions
     ): Promise<Contracts.IReputation__factory>;
+    getContractFactory(
+      name: "ERC2771Context",
+      signerOrOptions?: ethers.Signer | FactoryOptions
+    ): Promise<Contracts.ERC2771Context__factory>;
     getContractFactory(
       name: "MockToken",
       signerOrOptions?: ethers.Signer | FactoryOptions
@@ -90,6 +94,11 @@ declare module "hardhat/types/runtime" {
       address: string,
       signer?: ethers.Signer
     ): Promise<Contracts.IReputation>;
+    getContractAt(
+      name: "ERC2771Context",
+      address: string,
+      signer?: ethers.Signer
+    ): Promise<Contracts.ERC2771Context>;
     getContractAt(
       name: "MockToken",
       address: string,
diff --git a/src/types/index.ts b/src/types/index.ts
index 7badac8..0a23f55 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -19,6 +19,8 @@ export type { Owned } from "./lib/auth/Owned";
 export { Owned__factory } from "./factories/lib/auth/Owned__factory";
 export type { IReputation } from "./lib/interfaces/IReputation";
 export { IReputation__factory } from "./factories/lib/interfaces/IReputation__factory";
+export type { ERC2771Context } from "./lib/metatx/ERC2771Context";
+export { ERC2771Context__factory } from "./factories/lib/metatx/ERC2771Context__factory";
 export type { MockToken } from "./lib/mock/mockToken.sol/MockToken";
 export { MockToken__factory } from "./factories/lib/mock/mockToken.sol/MockToken__factory";
 export type { ERC20 } from "./lib/tokens/ERC20";
diff --git a/src/types/lib/index.ts b/src/types/lib/index.ts
index 68b6eeb..087add9 100644
--- a/src/types/lib/index.ts
+++ b/src/types/lib/index.ts
@@ -5,6 +5,8 @@ import type * as auth from "./auth";
 export type { auth };
 import type * as interfaces from "./interfaces";
 export type { interfaces };
+import type * as metatx from "./metatx";
+export type { metatx };
 import type * as mock from "./mock";
 export type { mock };
 import type * as tokens from "./tokens";
diff --git a/src/types/lib/metatx/ERC2771Context.ts b/src/types/lib/metatx/ERC2771Context.ts
new file mode 100644
index 0000000..70bdd8c
--- /dev/null
+++ b/src/types/lib/metatx/ERC2771Context.ts
@@ -0,0 +1,103 @@
+/* Autogenerated file. Do not edit manually. */
+/* tslint:disable */
+/* eslint-disable */
+import type {
+  BaseContract,
+  BigNumber,
+  BytesLike,
+  CallOverrides,
+  PopulatedTransaction,
+  Signer,
+  utils,
+} from "ethers";
+import type { FunctionFragment, Result } from "@ethersproject/abi";
+import type { Listener, Provider } from "@ethersproject/providers";
+import type {
+  TypedEventFilter,
+  TypedEvent,
+  TypedListener,
+  OnEvent,
+  PromiseOrValue,
+} from "../../common";
+
+export interface ERC2771ContextInterface extends utils.Interface {
+  functions: {
+    "isTrustedForwarder(address)": FunctionFragment;
+  };
+
+  getFunction(nameOrSignatureOrTopic: "isTrustedForwarder"): FunctionFragment;
+
+  encodeFunctionData(
+    functionFragment: "isTrustedForwarder",
+    values: [PromiseOrValue<string>]
+  ): string;
+
+  decodeFunctionResult(
+    functionFragment: "isTrustedForwarder",
+    data: BytesLike
+  ): Result;
+
+  events: {};
+}
+
+export interface ERC2771Context extends BaseContract {
+  connect(signerOrProvider: Signer | Provider | string): this;
+  attach(addressOrName: string): this;
+  deployed(): Promise<this>;
+
+  interface: ERC2771ContextInterface;
+
+  queryFilter<TEvent extends TypedEvent>(
+    event: TypedEventFilter<TEvent>,
+    fromBlockOrBlockhash?: string | number | undefined,
+    toBlock?: string | number | undefined
+  ): Promise<Array<TEvent>>;
+
+  listeners<TEvent extends TypedEvent>(
+    eventFilter?: TypedEventFilter<TEvent>
+  ): Array<TypedListener<TEvent>>;
+  listeners(eventName?: string): Array<Listener>;
+  removeAllListeners<TEvent extends TypedEvent>(
+    eventFilter: TypedEventFilter<TEvent>
+  ): this;
+  removeAllListeners(eventName?: string): this;
+  off: OnEvent<this>;
+  on: OnEvent<this>;
+  once: OnEvent<this>;
+  removeListener: OnEvent<this>;
+
+  functions: {
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<[boolean]>;
+  };
+
+  isTrustedForwarder(
+    arg0: PromiseOrValue<string>,
+    overrides?: CallOverrides
+  ): Promise<boolean>;
+
+  callStatic: {
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<boolean>;
+  };
+
+  filters: {};
+
+  estimateGas: {
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<BigNumber>;
+  };
+
+  populateTransaction: {
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+  };
+}
diff --git a/src/types/lib/metatx/index.ts b/src/types/lib/metatx/index.ts
new file mode 100644
index 0000000..d5e1c80
--- /dev/null
+++ b/src/types/lib/metatx/index.ts
@@ -0,0 +1,4 @@
+/* Autogenerated file. Do not edit manually. */
+/* tslint:disable */
+/* eslint-disable */
+export type { ERC2771Context } from "./ERC2771Context";
diff --git a/src/types/p2pix.sol/P2PIX.ts b/src/types/p2pix.sol/P2PIX.ts
index eb77337..2688053 100644
--- a/src/types/p2pix.sol/P2PIX.ts
+++ b/src/types/p2pix.sol/P2PIX.ts
@@ -33,12 +33,15 @@ export interface P2PIXInterface extends utils.Interface {
     "_castKeyToAddr(uint256)": FunctionFragment;
     "allowedERC20s(address)": FunctionFragment;
     "defaultLockBlocks()": FunctionFragment;
-    "deposit(address,uint96,uint160,bool,bytes32)": FunctionFragment;
+    "deposit(address,uint96,string,bool,bytes32)": FunctionFragment;
     "getBalance(address,address)": FunctionFragment;
     "getBalances(address[],address)": FunctionFragment;
     "getLocksStatus(uint256[])": FunctionFragment;
     "getPixTarget(address,address)": FunctionFragment;
+    "getPixTargetString(address,address)": FunctionFragment;
+    "getStr(string)": FunctionFragment;
     "getValid(address,address)": FunctionFragment;
+    "isTrustedForwarder(address)": FunctionFragment;
     "lock(address,address,uint80,bytes32[],uint256[])": FunctionFragment;
     "lockCounter()": FunctionFragment;
     "mapLocks(uint256)": FunctionFragment;
@@ -46,11 +49,11 @@ export interface P2PIXInterface extends utils.Interface {
     "release(uint256,bytes32,bytes32,bytes32,uint8)": FunctionFragment;
     "reputation()": FunctionFragment;
     "sellerAllowList(uint256)": FunctionFragment;
-    "sellerBalance(uint256,address)": FunctionFragment;
     "setDefaultLockBlocks(uint256)": FunctionFragment;
     "setOwner(address)": FunctionFragment;
     "setReputation(address)": FunctionFragment;
     "setRoot(address,bytes32)": FunctionFragment;
+    "setTrustedFowarders(address[],bool[])": FunctionFragment;
     "setValidSigners(address[])": FunctionFragment;
     "setValidState(address,bool)": FunctionFragment;
     "tokenSettings(address[],bool[])": FunctionFragment;
@@ -73,7 +76,10 @@ export interface P2PIXInterface extends utils.Interface {
       | "getBalances"
       | "getLocksStatus"
       | "getPixTarget"
+      | "getPixTargetString"
+      | "getStr"
       | "getValid"
+      | "isTrustedForwarder"
       | "lock"
       | "lockCounter"
       | "mapLocks"
@@ -81,11 +87,11 @@ export interface P2PIXInterface extends utils.Interface {
       | "release"
       | "reputation"
       | "sellerAllowList"
-      | "sellerBalance"
       | "setDefaultLockBlocks"
       | "setOwner"
       | "setReputation"
       | "setRoot"
+      | "setTrustedFowarders"
       | "setValidSigners"
       | "setValidState"
       | "tokenSettings"
@@ -118,7 +124,7 @@ export interface P2PIXInterface extends utils.Interface {
     values: [
       PromiseOrValue<string>,
       PromiseOrValue<BigNumberish>,
-      PromiseOrValue<BigNumberish>,
+      PromiseOrValue<string>,
       PromiseOrValue<boolean>,
       PromiseOrValue<BytesLike>
     ]
@@ -139,10 +145,22 @@ export interface P2PIXInterface extends utils.Interface {
     functionFragment: "getPixTarget",
     values: [PromiseOrValue<string>, PromiseOrValue<string>]
   ): string;
+  encodeFunctionData(
+    functionFragment: "getPixTargetString",
+    values: [PromiseOrValue<string>, PromiseOrValue<string>]
+  ): string;
+  encodeFunctionData(
+    functionFragment: "getStr",
+    values: [PromiseOrValue<string>]
+  ): string;
   encodeFunctionData(
     functionFragment: "getValid",
     values: [PromiseOrValue<string>, PromiseOrValue<string>]
   ): string;
+  encodeFunctionData(
+    functionFragment: "isTrustedForwarder",
+    values: [PromiseOrValue<string>]
+  ): string;
   encodeFunctionData(
     functionFragment: "lock",
     values: [
@@ -180,10 +198,6 @@ export interface P2PIXInterface extends utils.Interface {
     functionFragment: "sellerAllowList",
     values: [PromiseOrValue<BigNumberish>]
   ): string;
-  encodeFunctionData(
-    functionFragment: "sellerBalance",
-    values: [PromiseOrValue<BigNumberish>, PromiseOrValue<string>]
-  ): string;
   encodeFunctionData(
     functionFragment: "setDefaultLockBlocks",
     values: [PromiseOrValue<BigNumberish>]
@@ -200,6 +214,10 @@ export interface P2PIXInterface extends utils.Interface {
     functionFragment: "setRoot",
     values: [PromiseOrValue<string>, PromiseOrValue<BytesLike>]
   ): string;
+  encodeFunctionData(
+    functionFragment: "setTrustedFowarders",
+    values: [PromiseOrValue<string>[], PromiseOrValue<boolean>[]]
+  ): string;
   encodeFunctionData(
     functionFragment: "setValidSigners",
     values: [PromiseOrValue<string>[]]
@@ -271,7 +289,16 @@ export interface P2PIXInterface extends utils.Interface {
     functionFragment: "getPixTarget",
     data: BytesLike
   ): Result;
+  decodeFunctionResult(
+    functionFragment: "getPixTargetString",
+    data: BytesLike
+  ): Result;
+  decodeFunctionResult(functionFragment: "getStr", data: BytesLike): Result;
   decodeFunctionResult(functionFragment: "getValid", data: BytesLike): Result;
+  decodeFunctionResult(
+    functionFragment: "isTrustedForwarder",
+    data: BytesLike
+  ): Result;
   decodeFunctionResult(functionFragment: "lock", data: BytesLike): Result;
   decodeFunctionResult(
     functionFragment: "lockCounter",
@@ -285,10 +312,6 @@ export interface P2PIXInterface extends utils.Interface {
     functionFragment: "sellerAllowList",
     data: BytesLike
   ): Result;
-  decodeFunctionResult(
-    functionFragment: "sellerBalance",
-    data: BytesLike
-  ): Result;
   decodeFunctionResult(
     functionFragment: "setDefaultLockBlocks",
     data: BytesLike
@@ -299,6 +322,10 @@ export interface P2PIXInterface extends utils.Interface {
     data: BytesLike
   ): Result;
   decodeFunctionResult(functionFragment: "setRoot", data: BytesLike): Result;
+  decodeFunctionResult(
+    functionFragment: "setTrustedFowarders",
+    data: BytesLike
+  ): Result;
   decodeFunctionResult(
     functionFragment: "setValidSigners",
     data: BytesLike
@@ -342,6 +369,7 @@ export interface P2PIXInterface extends utils.Interface {
     "OwnerUpdated(address,address)": EventFragment;
     "ReputationUpdated(address)": EventFragment;
     "RootUpdated(address,bytes32)": EventFragment;
+    "TrustedForwarderUpdated(address,bool)": EventFragment;
     "ValidSet(address,address,bool)": EventFragment;
     "ValidSignersUpdated(address[])": EventFragment;
   };
@@ -357,6 +385,7 @@ export interface P2PIXInterface extends utils.Interface {
   getEvent(nameOrSignatureOrTopic: "OwnerUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ReputationUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "RootUpdated"): EventFragment;
+  getEvent(nameOrSignatureOrTopic: "TrustedForwarderUpdated"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSet"): EventFragment;
   getEvent(nameOrSignatureOrTopic: "ValidSignersUpdated"): EventFragment;
 }
@@ -489,6 +518,18 @@ export type RootUpdatedEvent = TypedEvent<
 
 export type RootUpdatedEventFilter = TypedEventFilter<RootUpdatedEvent>;
 
+export interface TrustedForwarderUpdatedEventObject {
+  forwarder: string;
+  state: boolean;
+}
+export type TrustedForwarderUpdatedEvent = TypedEvent<
+  [string, boolean],
+  TrustedForwarderUpdatedEventObject
+>;
+
+export type TrustedForwarderUpdatedEventFilter =
+  TypedEventFilter<TrustedForwarderUpdatedEvent>;
+
 export interface ValidSetEventObject {
   seller: string;
   token: string;
@@ -559,7 +600,7 @@ export interface P2PIX extends BaseContract {
     deposit(
       _token: PromiseOrValue<string>,
       _amount: PromiseOrValue<BigNumberish>,
-      _pixTarget: PromiseOrValue<BigNumberish>,
+      _pixTarget: PromiseOrValue<string>,
       _valid: PromiseOrValue<boolean>,
       allowlistRoot: PromiseOrValue<BytesLike>,
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -586,7 +627,18 @@ export interface P2PIX extends BaseContract {
       seller: PromiseOrValue<string>,
       token: PromiseOrValue<string>,
       overrides?: CallOverrides
-    ): Promise<[BigNumber] & { pixTarget: BigNumber }>;
+    ): Promise<[string] & { pixTarget: string }>;
+
+    getPixTargetString(
+      seller: PromiseOrValue<string>,
+      token: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<[string] & { pixTarget: string }>;
+
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<[string] & { strEnc: string }>;
 
     getValid(
       seller: PromiseOrValue<string>,
@@ -594,6 +646,11 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<[boolean] & { valid: boolean }>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<[boolean]>;
+
     lock(
       _seller: PromiseOrValue<string>,
       _token: PromiseOrValue<string>,
@@ -609,22 +666,14 @@ export interface P2PIX extends BaseContract {
       arg0: PromiseOrValue<BigNumberish>,
       overrides?: CallOverrides
     ): Promise<
-      [
-        BigNumber,
-        BigNumber,
-        string,
-        string,
-        BigNumber,
-        BigNumber,
-        BigNumber
-      ] & {
-        amount: BigNumber;
-        pixTarget: BigNumber;
-        token: string;
-        buyerAddress: string;
+      [BigNumber, BigNumber, BigNumber, string, BigNumber, string, string] & {
         sellerKey: BigNumber;
         counter: BigNumber;
         expirationBlock: BigNumber;
+        pixTarget: string;
+        amount: BigNumber;
+        token: string;
+        buyerAddress: string;
       }
     >;
 
@@ -646,12 +695,6 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<[string] & { root: string }>;
 
-    sellerBalance(
-      sellerKey: PromiseOrValue<BigNumberish>,
-      erc20: PromiseOrValue<string>,
-      overrides?: CallOverrides
-    ): Promise<[BigNumber] & { packed: BigNumber }>;
-
     setDefaultLockBlocks(
       _blocks: PromiseOrValue<BigNumberish>,
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -673,6 +716,12 @@ export interface P2PIX extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<ContractTransaction>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<ContractTransaction>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -742,7 +791,7 @@ export interface P2PIX extends BaseContract {
   deposit(
     _token: PromiseOrValue<string>,
     _amount: PromiseOrValue<BigNumberish>,
-    _pixTarget: PromiseOrValue<BigNumberish>,
+    _pixTarget: PromiseOrValue<string>,
     _valid: PromiseOrValue<boolean>,
     allowlistRoot: PromiseOrValue<BytesLike>,
     overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -769,7 +818,18 @@ export interface P2PIX extends BaseContract {
     seller: PromiseOrValue<string>,
     token: PromiseOrValue<string>,
     overrides?: CallOverrides
-  ): Promise<BigNumber>;
+  ): Promise<string>;
+
+  getPixTargetString(
+    seller: PromiseOrValue<string>,
+    token: PromiseOrValue<string>,
+    overrides?: CallOverrides
+  ): Promise<string>;
+
+  getStr(
+    str: PromiseOrValue<string>,
+    overrides?: CallOverrides
+  ): Promise<string>;
 
   getValid(
     seller: PromiseOrValue<string>,
@@ -777,6 +837,11 @@ export interface P2PIX extends BaseContract {
     overrides?: CallOverrides
   ): Promise<boolean>;
 
+  isTrustedForwarder(
+    arg0: PromiseOrValue<string>,
+    overrides?: CallOverrides
+  ): Promise<boolean>;
+
   lock(
     _seller: PromiseOrValue<string>,
     _token: PromiseOrValue<string>,
@@ -792,14 +857,14 @@ export interface P2PIX extends BaseContract {
     arg0: PromiseOrValue<BigNumberish>,
     overrides?: CallOverrides
   ): Promise<
-    [BigNumber, BigNumber, string, string, BigNumber, BigNumber, BigNumber] & {
-      amount: BigNumber;
-      pixTarget: BigNumber;
-      token: string;
-      buyerAddress: string;
+    [BigNumber, BigNumber, BigNumber, string, BigNumber, string, string] & {
       sellerKey: BigNumber;
       counter: BigNumber;
       expirationBlock: BigNumber;
+      pixTarget: string;
+      amount: BigNumber;
+      token: string;
+      buyerAddress: string;
     }
   >;
 
@@ -821,12 +886,6 @@ export interface P2PIX extends BaseContract {
     overrides?: CallOverrides
   ): Promise<string>;
 
-  sellerBalance(
-    sellerKey: PromiseOrValue<BigNumberish>,
-    erc20: PromiseOrValue<string>,
-    overrides?: CallOverrides
-  ): Promise<BigNumber>;
-
   setDefaultLockBlocks(
     _blocks: PromiseOrValue<BigNumberish>,
     overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -848,6 +907,12 @@ export interface P2PIX extends BaseContract {
     overrides?: Overrides & { from?: PromiseOrValue<string> }
   ): Promise<ContractTransaction>;
 
+  setTrustedFowarders(
+    forwarders: PromiseOrValue<string>[],
+    states: PromiseOrValue<boolean>[],
+    overrides?: Overrides & { from?: PromiseOrValue<string> }
+  ): Promise<ContractTransaction>;
+
   setValidSigners(
     _validSigners: PromiseOrValue<string>[],
     overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -917,7 +982,7 @@ export interface P2PIX extends BaseContract {
     deposit(
       _token: PromiseOrValue<string>,
       _amount: PromiseOrValue<BigNumberish>,
-      _pixTarget: PromiseOrValue<BigNumberish>,
+      _pixTarget: PromiseOrValue<string>,
       _valid: PromiseOrValue<boolean>,
       allowlistRoot: PromiseOrValue<BytesLike>,
       overrides?: CallOverrides
@@ -944,7 +1009,18 @@ export interface P2PIX extends BaseContract {
       seller: PromiseOrValue<string>,
       token: PromiseOrValue<string>,
       overrides?: CallOverrides
-    ): Promise<BigNumber>;
+    ): Promise<string>;
+
+    getPixTargetString(
+      seller: PromiseOrValue<string>,
+      token: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<string>;
+
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<string>;
 
     getValid(
       seller: PromiseOrValue<string>,
@@ -952,6 +1028,11 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<boolean>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<boolean>;
+
     lock(
       _seller: PromiseOrValue<string>,
       _token: PromiseOrValue<string>,
@@ -967,22 +1048,14 @@ export interface P2PIX extends BaseContract {
       arg0: PromiseOrValue<BigNumberish>,
       overrides?: CallOverrides
     ): Promise<
-      [
-        BigNumber,
-        BigNumber,
-        string,
-        string,
-        BigNumber,
-        BigNumber,
-        BigNumber
-      ] & {
-        amount: BigNumber;
-        pixTarget: BigNumber;
-        token: string;
-        buyerAddress: string;
+      [BigNumber, BigNumber, BigNumber, string, BigNumber, string, string] & {
         sellerKey: BigNumber;
         counter: BigNumber;
         expirationBlock: BigNumber;
+        pixTarget: string;
+        amount: BigNumber;
+        token: string;
+        buyerAddress: string;
       }
     >;
 
@@ -1004,12 +1077,6 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<string>;
 
-    sellerBalance(
-      sellerKey: PromiseOrValue<BigNumberish>,
-      erc20: PromiseOrValue<string>,
-      overrides?: CallOverrides
-    ): Promise<BigNumber>;
-
     setDefaultLockBlocks(
       _blocks: PromiseOrValue<BigNumberish>,
       overrides?: CallOverrides
@@ -1031,6 +1098,12 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<void>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: CallOverrides
+    ): Promise<void>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: CallOverrides
@@ -1175,6 +1248,15 @@ export interface P2PIX extends BaseContract {
       merkleRoot?: PromiseOrValue<BytesLike> | null
     ): RootUpdatedEventFilter;
 
+    "TrustedForwarderUpdated(address,bool)"(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+    TrustedForwarderUpdated(
+      forwarder?: PromiseOrValue<string> | null,
+      state?: PromiseOrValue<boolean> | null
+    ): TrustedForwarderUpdatedEventFilter;
+
     "ValidSet(address,address,bool)"(
       seller?: PromiseOrValue<string> | null,
       token?: null,
@@ -1213,7 +1295,7 @@ export interface P2PIX extends BaseContract {
     deposit(
       _token: PromiseOrValue<string>,
       _amount: PromiseOrValue<BigNumberish>,
-      _pixTarget: PromiseOrValue<BigNumberish>,
+      _pixTarget: PromiseOrValue<string>,
       _valid: PromiseOrValue<boolean>,
       allowlistRoot: PromiseOrValue<BytesLike>,
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -1242,12 +1324,28 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<BigNumber>;
 
+    getPixTargetString(
+      seller: PromiseOrValue<string>,
+      token: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<BigNumber>;
+
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<BigNumber>;
+
     getValid(
       seller: PromiseOrValue<string>,
       token: PromiseOrValue<string>,
       overrides?: CallOverrides
     ): Promise<BigNumber>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<BigNumber>;
+
     lock(
       _seller: PromiseOrValue<string>,
       _token: PromiseOrValue<string>,
@@ -1282,12 +1380,6 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<BigNumber>;
 
-    sellerBalance(
-      sellerKey: PromiseOrValue<BigNumberish>,
-      erc20: PromiseOrValue<string>,
-      overrides?: CallOverrides
-    ): Promise<BigNumber>;
-
     setDefaultLockBlocks(
       _blocks: PromiseOrValue<BigNumberish>,
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -1309,6 +1401,12 @@ export interface P2PIX extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<BigNumber>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<BigNumber>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -1379,7 +1477,7 @@ export interface P2PIX extends BaseContract {
     deposit(
       _token: PromiseOrValue<string>,
       _amount: PromiseOrValue<BigNumberish>,
-      _pixTarget: PromiseOrValue<BigNumberish>,
+      _pixTarget: PromiseOrValue<string>,
       _valid: PromiseOrValue<boolean>,
       allowlistRoot: PromiseOrValue<BytesLike>,
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -1408,12 +1506,28 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<PopulatedTransaction>;
 
+    getPixTargetString(
+      seller: PromiseOrValue<string>,
+      token: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+
+    getStr(
+      str: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+
     getValid(
       seller: PromiseOrValue<string>,
       token: PromiseOrValue<string>,
       overrides?: CallOverrides
     ): Promise<PopulatedTransaction>;
 
+    isTrustedForwarder(
+      arg0: PromiseOrValue<string>,
+      overrides?: CallOverrides
+    ): Promise<PopulatedTransaction>;
+
     lock(
       _seller: PromiseOrValue<string>,
       _token: PromiseOrValue<string>,
@@ -1448,12 +1562,6 @@ export interface P2PIX extends BaseContract {
       overrides?: CallOverrides
     ): Promise<PopulatedTransaction>;
 
-    sellerBalance(
-      sellerKey: PromiseOrValue<BigNumberish>,
-      erc20: PromiseOrValue<string>,
-      overrides?: CallOverrides
-    ): Promise<PopulatedTransaction>;
-
     setDefaultLockBlocks(
       _blocks: PromiseOrValue<BigNumberish>,
       overrides?: Overrides & { from?: PromiseOrValue<string> }
@@ -1475,6 +1583,12 @@ export interface P2PIX extends BaseContract {
       overrides?: Overrides & { from?: PromiseOrValue<string> }
     ): Promise<PopulatedTransaction>;
 
+    setTrustedFowarders(
+      forwarders: PromiseOrValue<string>[],
+      states: PromiseOrValue<boolean>[],
+      overrides?: Overrides & { from?: PromiseOrValue<string> }
+    ): Promise<PopulatedTransaction>;
+
     setValidSigners(
       _validSigners: PromiseOrValue<string>[],
       overrides?: Overrides & { from?: PromiseOrValue<string> }
diff --git a/test/p2pix.test.ts b/test/p2pix.test.ts
index 87a9dfc..607c98e 100644
--- a/test/p2pix.test.ts
+++ b/test/p2pix.test.ts
@@ -302,7 +302,7 @@ describe("P2PIX", () => {
   });
   describe("Deposit", async () => {
     it("should revert if ERC20 is not allowed", async () => {
-      const pTarget = ethers.BigNumber.from(7331);
+      const pTarget = "7ce3339x4133301u8f63pn71a5333118";
       const root = ethers.utils.keccak256(
         ethers.utils.toUtf8Bytes("root"),
       );
@@ -326,7 +326,7 @@ describe("P2PIX", () => {
       const tx = p2pix.deposit(
         erc20.address,
         1,
-        0,
+        "",
         true,
         root,
       );
@@ -337,7 +337,7 @@ describe("P2PIX", () => {
       );
     });
     it("should revert if amount exceeds the balance limit", async () => {
-      const pTarget = ethers.BigNumber.from(7331);
+      const pTarget = "7ce3339x4133301u8f63pn71a5333118";
       const root = ethers.utils.keccak256(
         ethers.utils.toUtf8Bytes("root"),
       );
@@ -355,7 +355,7 @@ describe("P2PIX", () => {
       );
     });
     it("should create deposit, update storage and emit event", async () => {
-      const pTarget = ethers.BigNumber.from(7331);
+      const pTarget = "7ce3339x4133301u8f63pn71a5333118";
       // we use `hashZero` to avoid updating seller's allowlist settings
       const root = ethers.constants.HashZero;
       await erc20.approve(p2pix.address, price);
@@ -387,6 +387,7 @@ describe("P2PIX", () => {
         erc20.address,
       );
 
+
       expect(tx).to.be.ok;
       await expect(tx)
         .to.emit(p2pix, "DepositAdded")
@@ -397,7 +398,7 @@ describe("P2PIX", () => {
         ["-100000000000000000000", price],
       );
       expect(storage).to.eq(price);
-      expect(pixTarget).to.eq(pTarget);
+      expect(pixTarget).to.eq(await p2pix.callStatic.getStr(pTarget));
       expect(valid).to.eq(true);
       expect(allowList).to.eq(root);
       expect(balances[0]).to.eq(price);
@@ -418,9 +419,9 @@ describe("P2PIX", () => {
         acc03.address,
       );
 
-      const pTarget = ethers.BigNumber.from(7331);
-      const pTarget2 = ethers.BigNumber.from(1337);
-      const pTarget3 = ethers.BigNumber.from(3731);
+      const pTarget = "7ce3339x4133301u8f63pn71a5333118";
+      const pTarget2 = "12312333321";
+      const pTarget3 = "43999999999";
       // we mock the allowlist root here only to test storage update. In depth
       // allowlist test coverage in both "Lock" and "Allowlist Settings" unit tests.
       const root = ethers.utils.keccak256(
@@ -588,29 +589,29 @@ describe("P2PIX", () => {
       expect(prices[3]).to.eq(balances[3]);
 
       expect(storage1).to.eq(price);
-      expect(pixTarget1).to.eq(pTarget);
+      expect(pixTarget1).to.eq(await p2pix.callStatic.getStr(pTarget));
       expect(valid1).to.eq(true);
       expect(allowList1).to.eq(root);
 
       expect(storage2).to.eq(price2);
-      expect(pixTarget2).to.eq(pTarget2);
+      expect(pixTarget2).to.eq(await p2pix.callStatic.getStr(pTarget2));
       expect(valid2).to.eq(false);
       expect(allowList2).to.eq(nullRoot);
 
       expect(storage3).to.eq(price3);
-      expect(pixTarget3).to.eq(pTarget3);
+      expect(pixTarget3).to.eq(await p2pix.callStatic.getStr(pTarget3));
       expect(valid3).to.eq(true);
       expect(allowList3).to.eq(root);
 
       expect(storage4).to.eq(price4);
-      expect(pixTarget4).to.eq(pTarget);
+      expect(pixTarget4).to.eq(await p2pix.callStatic.getStr(pTarget));
       expect(valid4).to.eq(false);
       expect(allowList4).to.eq(nullRoot);
     });
   });
   describe("Lock", async () => {
     it("should revert if deposit is invalid", async () => {
-      const pTarget = ethers.BigNumber.from(7331);
+      const pTarget = "7ce3339x4133301u8f63pn71a5333118";
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -652,7 +653,7 @@ describe("P2PIX", () => {
     });
     it("should revert if wished amount is greater than balance's remaining amount", async () => {
       await erc20.approve(p2pix.address, price);
-      const pTarget = ethers.BigNumber.from(1337);
+      const pTarget = "7ce3339x4133301u8f63pn71a5333118";
       await p2pix.deposit(
         erc20.address,
         price,
@@ -683,7 +684,7 @@ describe("P2PIX", () => {
       await p2pix.deposit(
         erc20.address,
         price,
-        ethers.BigNumber.from("1337"),
+        "7ce3339x4133301u8f63pn71a5333118",
         true,
         merkleRoot,
       );
@@ -716,7 +717,7 @@ describe("P2PIX", () => {
       await p2pix.deposit(
         erc20.address,
         price.mul(BigNumber.from("3")),
-        ethers.BigNumber.from("1"),
+        "1",
         true,
         merkleRoot,
       );
@@ -738,7 +739,7 @@ describe("P2PIX", () => {
       );
     });
     it("should create a lock, update storage and emit events via the allowlist path", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = "333";
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -784,14 +785,14 @@ describe("P2PIX", () => {
       // );
       expect(storage.amount).to.eq(price);
       expect(storage.expirationBlock).to.eq(expiration);
-      expect(storage.pixTarget).to.eq(target);
+      expect(storage.pixTarget).to.eq(await p2pix.callStatic.getStr(target));
       expect(storage.buyerAddress).to.eq(acc01.address);
       // expect(storage.relayerAddress).to.eq(acc01.address);
       expect(storage.token).to.eq(erc20.address);
     });
     it("should create a lock, update storage and emit events via the reputation path 1", async () => {
       const root = ethers.constants.HashZero;
-      const target = ethers.BigNumber.from(101);
+      const target = "101";
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -833,7 +834,7 @@ describe("P2PIX", () => {
       // );
       expect(storage.amount).to.eq(price);
       expect(storage.expirationBlock).to.eq(expiration);
-      expect(storage.pixTarget).to.eq(target);
+      expect(storage.pixTarget).to.eq(await p2pix.callStatic.getStr(target));
       expect(storage.buyerAddress).to.eq(acc01.address);
       // expect(storage.relayerAddress).to.eq(acc01.address);
       expect(storage.token).to.eq(erc20.address);
@@ -848,10 +849,10 @@ describe("P2PIX", () => {
         .mul(ethers.constants.Two)
         .add(ethers.constants.One);
       const endtoendID = ethers.constants.HashZero;
-      const target = ethers.BigNumber.from(101);
+      const target = "101";
       const messageToSign = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [target, price, endtoendID],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(target), price, endtoendID],
       );
       const messageHashBytes =
         ethers.utils.arrayify(messageToSign);
@@ -922,7 +923,7 @@ describe("P2PIX", () => {
         price.add(ethers.constants.One),
       );
       expect(storage.expirationBlock).to.eq(expiration);
-      expect(storage.pixTarget).to.eq(target);
+      expect(storage.pixTarget).to.eq(await p2pix.callStatic.getStr(target));
       expect(storage.buyerAddress).to.eq(acc01.address);
       // expect(storage.relayerAddress).to.eq(acc01.address);
       expect(storage.token).to.eq(erc20.address);
@@ -934,7 +935,7 @@ describe("P2PIX", () => {
     // edge case test
     it("should create multiple locks", async () => {
       const newPrice = price.div(ethers.BigNumber.from(2));
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -1088,7 +1089,7 @@ describe("P2PIX", () => {
       expect(storage2.expirationBlock).to.eq(expiration2);
       expect(storage3.expirationBlock).to.eq(expiration3);
 
-      expect(target)
+      expect(await p2pix.callStatic.getStr(target))
         .to.eq(storage1.pixTarget)
         .and.to.eq(storage2.pixTarget)
         .and.to.eq(storage3.pixTarget);
@@ -1138,7 +1139,7 @@ describe("P2PIX", () => {
       await p2pix.deposit(
         erc20.address,
         price,
-        ethers.BigNumber.from(10101),
+        ethers.BigNumber.from(10101).toString(),
         true,
         merkleRoot,
       );
@@ -1165,7 +1166,7 @@ describe("P2PIX", () => {
     it("should cancel multiple balances", async () => {
       const hashZero = ethers.constants.HashZero;
       await erc20.mint([acc01.address, acc02.address], price);
-      const target = ethers.BigNumber.from("1");
+      const target = ethers.BigNumber.from("1").toString();
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -1255,7 +1256,7 @@ describe("P2PIX", () => {
   });
   describe("Release", async () => {
     it("should revert if lock has expired", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       const messageToSign = ethers.utils.solidityKeccak256(
         ["uint160", "uint80", "bytes32"],
         [target, 100, ethers.constants.HashZero],
@@ -1299,11 +1300,11 @@ describe("P2PIX", () => {
       );
     });
     it("should revert if lock has already been released", async () => {
-      const target = ethers.BigNumber.from("1");
+      const target = ethers.BigNumber.from("1").toString();
       const hashZero = ethers.constants.HashZero;
       const messageToSign = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [target, 100, hashZero],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(target), 100, hashZero],
       );
       const flatSig = await acc01.signMessage(
         ethers.utils.arrayify(messageToSign),
@@ -1350,10 +1351,10 @@ describe("P2PIX", () => {
       );
     });
     it("should revert if signed message has already been used", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       const messageToSign = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [target, 100, ethers.constants.HashZero],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(target), 100, ethers.constants.HashZero],
       );
       const flatSig = await owner.signMessage(
         ethers.utils.arrayify(messageToSign),
@@ -1415,10 +1416,10 @@ describe("P2PIX", () => {
       );
     });
     it("should revert if ecrecovered signer is invalid", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       const messageToSign = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [target, 100, ethers.constants.HashZero],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(target), 100, ethers.constants.HashZero],
       );
       const flatSig = await acc03.signMessage(
         ethers.utils.arrayify(messageToSign),
@@ -1462,10 +1463,10 @@ describe("P2PIX", () => {
     it("should release lock, update storage and emit events", async () => {
       const zero = ethers.constants.Zero;
       const endtoendID = ethers.constants.HashZero;
-      const pixTarget = ethers.BigNumber.from(101);
+      const pixTarget = ethers.BigNumber.from(101).toString();
       const messageToSign = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [pixTarget, 100, endtoendID],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(pixTarget), 100, endtoendID],
       );
       // Note: messageToSign is a string, that is 66-bytes long, to sign the
       //       binary value, we must convert it to the 32 byte Array that
@@ -1615,7 +1616,7 @@ describe("P2PIX", () => {
     // edge case test
     it("should release multiple locks", async () => {
       const endtoendID = ethers.constants.HashZero;
-      const pixTarget = ethers.BigNumber.from(101);
+      const pixTarget = ethers.BigNumber.from(101).toString();
       const root = ethers.constants.HashZero;
       const acc01Key = await p2pix.callStatic._castAddrToKey(
         acc01.address,
@@ -1630,24 +1631,24 @@ describe("P2PIX", () => {
         acc03Key,
       );
       const messageToSign1 = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [pixTarget, 100, endtoendID],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(pixTarget), 100, endtoendID],
       );
       const flatSig1 = await owner.signMessage(
         ethers.utils.arrayify(messageToSign1),
       );
       const sig1 = ethers.utils.splitSignature(flatSig1);
       const messageToSign2 = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [pixTarget, 50, endtoendID],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(pixTarget), 50, endtoendID],
       );
       const flatSig2 = await owner.signMessage(
         ethers.utils.arrayify(messageToSign2),
       );
       const sig2 = ethers.utils.splitSignature(flatSig2);
       const messageToSign3 = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [pixTarget, 25, endtoendID],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(pixTarget), 25, endtoendID],
       );
       const flatSig3 = await owner.signMessage(
         ethers.utils.arrayify(messageToSign3),
@@ -1851,7 +1852,7 @@ describe("P2PIX", () => {
   });
   describe("Unexpire Locks", async () => {
     it("should revert if lock isn't expired", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -1881,10 +1882,10 @@ describe("P2PIX", () => {
     });
     it("should revert if lock has already been released", async () => {
       const endtoendID = ethers.constants.HashZero;
-      const pixTarget = ethers.BigNumber.from(101);
+      const pixTarget = ethers.BigNumber.from(101).toString();
       const messageToSign = ethers.utils.solidityKeccak256(
-        ["uint160", "uint80", "bytes32"],
-        [pixTarget, 1, endtoendID],
+        ["bytes32", "uint80", "bytes32"],
+        [await p2pix.callStatic.getStr(pixTarget), 1, endtoendID],
       );
       const messageHashBytes =
         ethers.utils.arrayify(messageToSign);
@@ -1928,7 +1929,7 @@ describe("P2PIX", () => {
       );
     });
     it("should unlock expired locks, update storage and emit events", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -1992,7 +1993,7 @@ describe("P2PIX", () => {
       );
     });
     it("should unlock expired through lock function", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       // test method through lock fx
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
@@ -2068,7 +2069,7 @@ describe("P2PIX", () => {
       );
     });
     it("should unlock expired through withdraw function", async () => {
-      const target = ethers.constants.One;
+      const target = ethers.constants.One.toString();
       // test method through withdraw fx
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
@@ -2110,7 +2111,7 @@ describe("P2PIX", () => {
 
   describe("Seller Withdraw", async () => {
     it("should revert if the wished amount is invalid", async () => {
-      const target = ethers.BigNumber.from(101);
+      const target = ethers.BigNumber.from(101).toString();
       await erc20.approve(p2pix.address, price);
       await p2pix.deposit(
         erc20.address,
@@ -2138,7 +2139,7 @@ describe("P2PIX", () => {
       const dep = await p2pix.deposit(
         erc20.address,
         price,
-        ethers.BigNumber.from(101),
+        ethers.BigNumber.from(101).toString(),
         true,
         merkleRoot,
       );
diff --git a/test/utils/fixtures.ts b/test/utils/fixtures.ts
index 704e842..d63917b 100644
--- a/test/utils/fixtures.ts
+++ b/test/utils/fixtures.ts
@@ -23,7 +23,7 @@ export interface Lock {
   sellerKey: BigNumber;
   counter: BigNumber;
   expirationBlock: BigNumber;
-  pixTarget: BigNumber;
+  pixTarget: string;
   token: string;
   buyerAddress: string;
   amount: BigNumber;