Add AddressToUintMap (#3150)

* add AddressToUintMap

* Update contracts/utils/structs/EnumerableMap.sol

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

* address comments

* lint code

* merge mocks into a single file

* add PR link to changelog entry

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>
Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>

contracts/mocks/EnumerableMapMock.sol

@@ -4,7 +4,8 @@ pragma solidity ^0.8.0;
 
 import "../utils/structs/EnumerableMap.sol";
 
-contract EnumerableMapMock {
+// UintToAddressMap
+contract UintToAddressMapMock {
     using EnumerableMap for EnumerableMap.UintToAddressMap;
 
     event OperationResult(bool result);
@@ -45,3 +46,42 @@ contract EnumerableMapMock {
         return _map.get(key, errorMessage);
     }
 }
+
+// AddressToUintMap
+contract AddressToUintMapMock {
+    using EnumerableMap for EnumerableMap.AddressToUintMap;
+
+    event OperationResult(bool result);
+
+    EnumerableMap.AddressToUintMap private _map;
+
+    function contains(address key) public view returns (bool) {
+        return _map.contains(key);
+    }
+
+    function set(address key, uint256 value) public {
+        bool result = _map.set(key, value);
+        emit OperationResult(result);
+    }
+
+    function remove(address key) public {
+        bool result = _map.remove(key);
+        emit OperationResult(result);
+    }
+
+    function length() public view returns (uint256) {
+        return _map.length();
+    }
+
+    function at(uint256 index) public view returns (address key, uint256 value) {
+        return _map.at(index);
+    }
+
+    function tryGet(address key) public view returns (bool, uint256) {
+        return _map.tryGet(key);
+    }
+
+    function get(address key) public view returns (uint256) {
+        return _map.get(key);
+    }
+}