# Get started with Casper

### 1. Create and deploy a simple, smart contract with cargo casper and cargo test

Create a project called project1 with cargo casper


Once the project is created move to tests folder and run cargo test


The final result shows the successful creation and test of a simple contract.


### 2. Complete one of the existing tutorials for writing smart contracts

I completed the Multi-signature tutorial for this task.

Clone the tutorial and build smart contract


Set up Local Network and view the Network State


Setting up the client


Testing the client


Final State


### 3. Demonstrate key management concepts by modifying the client in the Multi-Sig tutorial to address one of the additional scenarios

Scenario Two - deploying with special keys

scenario-two.js code

const keyManager = require('./key-manager');
const TRANSFER_AMOUNT = process.env.TRANSFER_AMOUNT || 2500000000;

(async function() {
    // In this example, I am implementing scenario 2
    // There are two keys main (which can do both deployment and key management)
    // and secondary which can only do deployment but not key management

    // To achive the task, we will:
    // 1. Set mainAccount's weight to 2.
    // 2. Set Keys Management Threshold to 2.
    // 3. Set Deploy Threshold to 1.
    // 4. Add new key with weight 1 (secondary account).
    // 5. Make a transfer using secondary account. (should succeed)
    // 6. Add new key using secondary account. (should fail)

    let deploy;

    // init

    let masterKey = keyManager.randomMasterKey();
    let mainAccount = masterKey.deriveIndex(1);// Main Account
    let secondaryAccount = masterKey.deriveIndex(2);//Secondary Account
    let testAccount = masterKey.deriveIndex(3);// Test account

    console.log("\n0.1 Fund main account.\n");
    await keyManager.fundAccount(mainAccount);
    await keyManager.printAccount(mainAccount);
    
    console.log("\n[x]0.2 Install Keys Manager contract");
    deploy = keyManager.keys.buildContractInstallDeploy(mainAccount);
    await keyManager.sendDeploy(deploy, [mainAccount]);
    await keyManager.printAccount(mainAccount);

    // 1. Set mainAccount's weight to 2
    console.log("\n1. Set faucet's weight to 2\n");
    deploy = keyManager.keys.setKeyWeightDeploy(mainAccount, mainAccount, 2);
    await keyManager.sendDeploy(deploy, [mainAccount]);
    await keyManager.printAccount(mainAccount);
    
    // 2. Set Keys Management Threshold to 2.
    console.log("\n2. Set Keys Management Threshold to 2\n");
    deploy = keyManager.keys.setKeyManagementThresholdDeploy(mainAccount, 2);
    await keyManager.sendDeploy(deploy, [mainAccount]);
    await keyManager.printAccount(mainAccount);
    
    // 3. Set Deploy Threshold to 1.
    console.log("\n3. Set Deploy Threshold to 1.\n");
    deploy = keyManager.keys.setDeploymentThresholdDeploy(mainAccount, 1);
    await keyManager.sendDeploy(deploy, [mainAccount]);
    await keyManager.printAccount(mainAccount);
    
    // 4. Add secondary key with weight 1 which can only deploy.
    console.log("\n4. Add secondary key with weight 1.\n");
    deploy = keyManager.keys.setKeyWeightDeploy(mainAccount, secondaryAccount, 1);
    await keyManager.sendDeploy(deploy, [mainAccount]);
    await keyManager.printAccount(mainAccount);

    // 6. Make a transfer from faucet using the secondary account.
    console.log("\n6. Make a transfer from faucet using the secondary account.\n");
    deploy = keyManager.transferDeploy(mainAccount, secondaryAccount, TRANSFER_AMOUNT);
    await keyManager.sendDeploy(deploy, [secondaryAccount]);
    await keyManager.printAccount(mainAccount);

    // 7. Add test key with weight 1 using secondary account.
    console.log("\n7. Add first new key with weight 1 using the secondary account. Should Fail\n");
    deploy = keyManager.keys.setKeyWeightDeploy(mainAccount, testAccount, 1);
    await keyManager.sendDeploy(deploy, [secondaryAccount]);
    await keyManager.printAccount(mainAccount);


})();


npm run start:two


Secondary key can only perform deployment but not key management.

6. Make a transfer from faucet using the secondary account. (Successful)


7. Add test key with weight 1 using secondary account. (Failure)


### 4. Learn to transfer tokens to an account on the Casper Testnet.

A Transfer of 3 CSPR from one account to another.


Check Deployment Status using deploy_hash


Get State Root Hash using block_hash


Query the Source Account using state root hash


Query the Target Account using state root hash


Query the source and target account balances one by one


Query full transfer details


Testenet Explorer

Source Account

https://testnet.cspr.live/account/01d722236475bb58a4b25af13b0b861fd5f12fe9767e67562393bf8a2cbf65e34b

Target Account

https://testnet.cspr.live/account/01bda75a3e3dc96673bd315f35f3834a9319f44c9cb6785d2e482a11b54bab6168

Deploy Hash

https://testnet.cspr.live/deploy/b0fe96be82cf8af90289babb54606459a495227cad2e185c1c667975c9bb1810

### 5. Learn to Delegate and Undelegate on the Casper Testnet.

Delegating 100 CSPR on Casper Testnet

Sign the transaction


100 CSPR staked


Staking Rewards after 4+ hours of staking


Undelegate 100 CSPR + rewards


Undelegated 100.08 CSPR


Account Status 24 hours after undelegating