Added token mapping contract

contracts/receivers/mapping/main.sol

@@ -0,0 +1,58 @@
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+interface IndexInterface {
+    function master() external view returns (address);
+}
+
+interface ConnectorsInterface {
+    function chief(address) external view returns (bool);
+}
+
+interface CTokenInterface {
+    function isCToken() external view returns (bool);
+    function underlying() external view returns (address);
+}
+
+abstract contract Helpers {
+
+    // struct TokenMap {
+    //     address ctoken;
+    //     address token;
+    // }
+
+    // event LogCTokenAdded(string indexed name, address indexed token, address indexed ctoken);
+    // event LogCTokenUpdated(string indexed name, address indexed token, address indexed ctoken);
+
+    // ConnectorsInterface public immutable connectors;
+
+    // InstaIndex Address.
+    IndexInterface public constant instaIndex = IndexInterface(0x2971AdFa57b20E5a416aE5a708A8655A9c74f723);
+
+    address public constant ethAddr = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
+
+    mapping (address => address) public tokenMapping;
+
+    // modifier isChief {
+    //     require(msg.sender == instaIndex.master() || connectors.chief(msg.sender), "not-an-chief");
+    //     _;
+    // }
+
+    // constructor(address _connectors) {
+    //     connectors = ConnectorsInterface(_connectors);
+    // }
+
+    function getMapping(address L1Address) external view returns (address) {
+        return tokenMapping[L1Address];
+    }
+
+}
+
+contract InstaPolygonTokenMapping is Helpers {
+
+    constructor(address[] memory L1, address[] memory L2) {
+        for (uint256 i = 0; i < L1.length; i++) {
+            tokenMapping[L1[i]] = L2[i];
+        }
+    }
+}