AddApprovedAddresses for ERC20X

QRC20X.sol

@@ -500,6 +500,23 @@ contract QRC20 {
         ApprovedAddresses[chain] = addr;
     }
 
+    /**
+    * This function allows the deployer to add external addresses for the token contract on different chains.
+    * Note that the deployer can only add one address per chain and this address cannot be changed afterwards.
+    * In comparison to AddApprovedAddress, this function allows the address(es) to be internal so that the same
+    * approved list can be used for every instance of the contract on each chain.
+    * Be very careful when adding addresses here.
+    */
+    function AddApprovedAddresses(uint8[] calldata chain, address[] calldata addr) external {
+        require(msg.sender == _deployer, "Sender is not deployer");
+        require(chain.length == addr.length, "chain and address arrays must be the same length");
+        for(uint8 i = 0; i < chain.length; i++) {
+            require(chain[i] < 9, "Max 9 zones");
+            require(ApprovedAddresses[chain[i]] == address(0), "The approved address for this zone already exists");
+            ApprovedAddresses[chain[i]] = addr[i];
+        }
+    }
+
     // This function uses the stored prefix list to determine an address's location based on its first byte.
     function getAddressLocation(address addr) public view returns (uint8) {
         uint8 prefix =  uint8(toBytes(addr)[0]);