# Gitcoin for Casper

## 1 // Create and deploy a simple, smart contract

> Building a simple smart contract and the result is below


> Final Result

{
  "id": 3056545300698198131,
  "jsonrpc": "2.0",
  "result": {
    "api_version": "1.3.2",
    "deploy_hash": "e1d3022f0db9c53cfef623b5b32a4bca11a30585e3d8b475987ef796f36d905a"
  }
}

> Part of checking purpose


> Final Result

{
  "id": 3056545300698198131,
  "jsonrpc": "2.0",
  "result": {
    "api_version": "1.3.2",
    "deploy_hash": "e1d3022f0db9c53cfef623b5b32a4bca11a30585e3d8b475987ef796f36d905a"
  }
}
(env) root@gitcoin-ubuntu:~# casper-client get-deploy --node-address http://5.189.180.23:7777 e1d3022f0db9c53cfef623b5b32a4bca11a30585                                                       e3d8b475987ef796f36d905a
{
  "id": 883491213049394635,
  "jsonrpc": "2.0",
  "result": {
    "api_version": "1.3.2",
    "deploy": {
      "approvals": [
        {
          "signature": "[130 hex chars]",
          "signer": "01a0d100bdc7d058e915b8d100aa3b0180935ef3c3fe320d8ccf27f45bc50c0aed"
        }
      ],
      "hash": "e1d3022f0db9c53cfef623b5b32a4bca11a30585e3d8b475987ef796f36d905a",
      "header": {
        "account": "01a0d100bdc7d058e915b8d100aa3b0180935ef3c3fe320d8ccf27f45bc50c0aed",
        "body_hash": "47de396bf9d2171ffda855bae540dfc7070dca083f835caf1859bb99e687635f",
        "chain_name": "casper-test",
        "dependencies": [],
        "gas_price": 1,
        "timestamp": "2021-09-19T20:10:01.797Z",
        "ttl": "30m"
      },
      "payment": {
        "ModuleBytes": {
          "args": [
            [
              "amount",
              {
                "bytes": "03809698",
                "cl_type": "U512",
                "parsed": "10000000"
              }
            ]
          ],
          "module_bytes": ""
        }
      },
      "session": {
        "ModuleBytes": {
          "args": [],
          "module_bytes": "[51990 hex chars]"
        }
      }
    },
    "execution_results": [
      {
        "block_hash": "674688eab14f967fabd7b615ee6bda9617b5eb0921a95ba3133bc9d17eb78c93",
        "result": {
          "Failure": {
            "cost": "1383320",
            "effect": {
              "operations": [
                {
                  "key": "hash-624dbe2395b9d9503fbee82162f1714ebff6b639f96d2084d26d944c354ec4c5",
                  "kind": "Read"
                },
                {
                  "key": "balance-b4f14f3aae5523d397b784be9547ea8153864f91cb8879209b8add1273392eea",
                  "kind": "Write"
                },
                {
                  "key": "balance-a9b97c0c0537ae2874759e06b863a3b82cf3593290206da8f5c6061c4a548d3f",
                  "kind": "Write"
                },
                {
                  "key": "hash-010c3fe81b7b862e50c77ef9a958a05bfa98444f26f96f23d37a13c96244cfb7",
                  "kind": "Read"
                },
                {
                  "key": "hash-8cf5e4acf51f54eb59291599187838dc3bc234089c46fc6ca8ad17e762ae4401",
                  "kind": "Read"
                },
                {
                  "key": "hash-9824d60dc3a5c44a20b9fd260a412437933835b52fc683d8ae36e4ec2114843e",
                  "kind": "Read"
                },
                {
                  "key": "balance-98d945f5324f865243b7c02c0417ab6eac361c5c56602fd42ced834a1ba201b6",
                  "kind": "Read"
                }
              ],
              "transforms": [
                {
                  "key": "hash-9824d60dc3a5c44a20b9fd260a412437933835b52fc683d8ae36e4ec2114843e",
                  "transform": "Identity"
                },
                {
                  "key": "hash-010c3fe81b7b862e50c77ef9a958a05bfa98444f26f96f23d37a13c96244cfb7",
                  "transform": "Identity"
                },
                {
                  "key": "balance-98d945f5324f865243b7c02c0417ab6eac361c5c56602fd42ced834a1ba201b6",
                  "transform": "Identity"
                },
                {
                  "key": "hash-624dbe2395b9d9503fbee82162f1714ebff6b639f96d2084d26d944c354ec4c5",
                  "transform": "Identity"
                },
                {
                  "key": "hash-8cf5e4acf51f54eb59291599187838dc3bc234089c46fc6ca8ad17e762ae4401",
                  "transform": "Identity"
                },
                {
                  "key": "balance-b4f14f3aae5523d397b784be9547ea8153864f91cb8879209b8add1273392eea",
                  "transform": {
                    "AddUInt512": "10000000"
                  }
                },
                {
                  "key": "balance-a9b97c0c0537ae2874759e06b863a3b82cf3593290206da8f5c6061c4a548d3f",
                  "transform": {
                    "WriteCLValue": {
                      "bytes": "05e07c3913e7",
                      "cl_type": "U512",
                      "parsed": "992459980000"
                    }
                  }
                }
              ]
            },
            "error_message": "ApiError::MissingArgument [2]",
            "transfers": []
          }
        }
      }
    ]
  }
}

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

### A Counter Contract Tutorial

> Faucet Account Information


> Final code

{
  "api_version": "1.0.0",
  "merkle_proof": "[2024 hex chars]",
  "stored_value": {
    "Account": {
      "account_hash": "account-hash-287b7c85c95eaf24f5c759cc5fecd3c672ef418534dc9f9158a57c5be159d603",
      "action_thresholds": {
        "deployment": 1,
        "key_management": 1
      },
      "associated_keys": [
        {
          "account_hash": "account-hash-287b7c85c95eaf24f5c759cc5fecd3c672ef418534dc9f9158a57c5be159d603",
          "weight": 1
        }
      ],
      "main_purse": "uref-01cda9f013abc5dbc489d21a0f5bdcb4689982fc805d5433181e668013c89f65-007",
      "named_keys": []
    }
  }
}

> State Root Hash


> Querying Network State


> Put Deploys (onto the Chain)


> Get Deploys (from the Chain)


> Deploy the Counter


> Put the contract on the chain.


> Get status of deploy contract


> View the Updated Network State

> Get the NEW state-root-hash:


> Get the network state:


> Increment the Counter


> View the Updated Network State Again

> Get the NEW state-root-hash:


> Get the network state, specifically for the count variable this time:


> Increment the Counter Again


> View the Final Network State

> Get the NEW state-root-hash:


> Get the network state, specifically for the count variable this time:


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

> Building the Smart Contract


> Setting up the Client


> Testing the Client


### Scenario 3: signing transactions with multiple keys

Create a scenario_3.js. This script will be used for demo the scenario.

The script located at .src/

Finally, at the script location to package.json for calling at the running step.

When perform the script and here is the reult:


## 4 // Transfer tokens to an account

> Perform the transfer


> Transfer successfully


## 5 // Delegate and Undelegate on the Casper Testnet

> Delegate on Casper Testnet will be performed below:


> Undelegate on Casper Testnet will be performed below: