feat: finish challenge

packages/hardhat/contracts/RiggedRoll.sol

@@ -11,6 +11,9 @@ contract RiggedRoll is Ownable {
     /////////////////
 
     // Errors go here...
+    error NotEnoughETH(uint256 required, uint256 available);
+    error NotWinningRoll(uint256 roll);
+    error InsufficientBalance(uint256 requested, uint256 available);
 
     //////////////////////
     /// State Variables //
@@ -31,4 +34,29 @@ contract RiggedRoll is Ownable {
     ///////////////////
 
     // Functions go here...
+    function riggedRoll() public {
+      uint256 required = 0.002 ether;
+
+      uint256 balance = address(this).balance;
+      if (balance < required) revert NotEnoughETH(required, balance);
+
+      // calculate
+      bytes32 prevHash = blockhash(block.number - 1);
+      bytes32 hash = keccak256(abi.encodePacked(prevHash, address(diceGame), diceGame.nonce()));
+      uint256 roll = uint256(hash) % 16;
+
+      if (roll > 5) revert NotWinningRoll(roll);
+
+      diceGame.rollTheDice{value: required}();
+    }
+
+    function withdraw(address _addr, uint256 _amount) public onlyOwner {
+      uint256 balance = address(this).balance;
+      if (balance < _amount) revert InsufficientBalance(_amount, balance);
+
+      (bool sent,) = payable(_addr).call{value: _amount}("");
+      require(sent, "failed to transfer");
+    }
+
+    receive() external payable {}
 }

packages/hardhat/deploy/01_deploy_riggedRoll.ts

@@ -11,21 +11,21 @@ const deployRiggedRoll: DeployFunction = async function (hre: HardhatRuntimeEnvi
   const diceGameAddress = await diceGame.getAddress();
 
   // Uncomment to deploy RiggedRoll contract
-  // await deploy("RiggedRoll", {
-  //   from: deployer,
-  //   log: true,
-  //   args: [diceGameAddress],
-  //   autoMine: true,
-  // });
+  await deploy("RiggedRoll", {
+    from: deployer,
+    log: true,
+    args: [diceGameAddress],
+    autoMine: true,
+  });
 
-  // const riggedRoll: RiggedRoll = await ethers.getContract("RiggedRoll", deployer);
+  const riggedRoll: RiggedRoll = await ethers.getContract("RiggedRoll", deployer);
 
   // Please replace the text "Your Address" with your own address.
-  // try {
-  //   await riggedRoll.transferOwnership("Your Address");
-  // } catch (err) {
-  //   console.log(err);
-  // }
+  try {
+    await riggedRoll.transferOwnership("0xD70D3fC875061A950d61cD5CDACb4aE4bF90608A");
+  } catch (err) {
+    console.log(err);
+  }
 };
 
 export default deployRiggedRoll;

packages/hardhat/deployments/sepolia/.chainId

@@ -0,0 +1 @@
+11155111

packages/hardhat/hardhat.config.ts

@@ -37,7 +37,7 @@ const config: HardhatUserConfig = {
       },
     ],
   },
-  defaultNetwork: "localhost",
+  defaultNetwork: "sepolia", //"localhost",
   namedAccounts: {
     deployer: {
       // By default, it will take the first Hardhat account as the deployer