add buyCollateral script and add setTargetReserves function for lending contract

abis/ILending.json

@@ -209,6 +209,19 @@
     "name": "SupplyCollateral",
     "type": "event"
   },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint104",
+        "name": "targetReserves",
+        "type": "uint104"
+      }
+    ],
+    "name": "TargetReservesUpdated",
+    "type": "event"
+  },
   {
     "anonymous": false,
     "inputs": [

abis/Lending.json

@@ -365,6 +365,19 @@
     "name": "SupplyCollateral",
     "type": "event"
   },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint104",
+        "name": "targetReserves",
+        "type": "uint104"
+      }
+    ],
+    "name": "TargetReservesUpdated",
+    "type": "event"
+  },
   {
     "anonymous": false,
     "inputs": [
@@ -1116,6 +1129,19 @@
     "stateMutability": "nonpayable",
     "type": "function"
   },
+  {
+    "inputs": [
+      {
+        "internalType": "uint104",
+        "name": "newTargetReserves",
+        "type": "uint104"
+      }
+    ],
+    "name": "setTargetReserves",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
   {
     "inputs": [],
     "name": "storeFrontPriceFactor",