Add `ABSOLUTE_PRESTATE` immutable

packages/contracts-bedrock/contracts/dispute/FaultDisputeGame.sol

@@ -45,6 +45,12 @@ contract FaultDisputeGame is IFaultDisputeGame, Clone {
      */
     Position internal constant ROOT_POSITION = Position.wrap(1);
 
+    /**
+     * @notice The absolute prestate of the instruction trace. This is a constant that is defined
+     *         by the program that is being used to execute the trace, in this case, Cannon.
+     */
+    Claim public immutable ABSOLUTE_PRESTATE;
+
     /**
      * @notice The starting timestamp of the game
      */
@@ -70,6 +76,13 @@ contract FaultDisputeGame is IFaultDisputeGame, Clone {
      */
     mapping(ClaimHash => bool) internal claims;
 
+    /**
+     * @param _absolutePrestate The absolute prestate of the instruction trace.
+     */
+    constructor(Claim _absolutePrestate) {
+        ABSOLUTE_PRESTATE = _absolutePrestate;
+    }
+
     ////////////////////////////////////////////////////////////////
     //                       External Logic                       //
     ////////////////////////////////////////////////////////////////

packages/contracts-bedrock/contracts/test/FaultDisputeGame.t.sol

@@ -43,7 +43,7 @@ contract FaultDisputeGame_Test is DisputeGameFactory_Init {
     function setUp() public override {
         super.setUp();
         // Deploy an implementation of the fault game
-        gameImpl = new FaultDisputeGame();
+        gameImpl = new FaultDisputeGame(Claim.wrap(bytes32(uint256(5))));
         // Register the game implementation with the factory.
         factory.setImplementation(GAME_TYPE, gameImpl);
         // Create a new game.