2_deploy_helloworld.js

var HelloWorld = artifacts.require('HelloWorld')

module.exports = function(deployer) {
  deployer.deploy(HelloWorld)
}

celo_deploy.js

const Web3 = require('web3')
const ContractKit = require('@celo/contractkit')
const web3 = new Web3('https://alfajores-forno.celo-testnet.org')
const kit = ContractKit.newKitFromWeb3(web3)
const getAccount = require('./getAccount').getAccount
// const HelloWorld = require('./build/contracts/HelloWorld.json')

async function awaitWrapper(){
    let account = await getAccount()
    
    // This account must have a CELO balance to pay tx fees 
    // get some testnet funds at https://celo.org/build/faucet

    // account used: 0x5ad5fC1834f9c76221CfE4DA34113865838a1E80
    // transaction hash: 0x67e0ea994308a062632d97bc514eb76ac1b92d88224204a49c90ed321b41df69
    console.log(account.address)
    
    kit.connection.addAccount(account.privateKey) // this account must have a CELO balance to pay transaction fees

//     let tx = await kit.connection.sendTransaction({
//         from: account.address,
//         data: HelloWorld.bytecode
//     })

//     const receipt = await tx.waitReceipt()
//     console.log(receipt)
}

awaitWrapper()

gistfile1.txt

/**
 * Use this file to configure your truffle project. It's seeded with some
 * common settings for different networks and features like migrations,
 * compilation and testing. Uncomment the ones you need or modify
 * them to suit your project as necessary.
 *
 * More information about configuration can be found at:
 *
 * truffleframework.com/docs/advanced/configuration
 */

const Web3 = require('web3')
const ContractKit = require('@celo/contractkit')
const web3 = new Web3('https://alfajores-forno.celo-testnet.org')
const kit = ContractKit.newKitFromWeb3(web3)
const getAccount = require('./getAccount').getAccount

async function awaitWrapper(){
    let account = await getAccount()
    kit.connection.addAccount(account.privateKey)
}
awaitWrapper()

module.exports = {
  /**
   * Networks define how you connect to your ethereum client and let you set the
   * defaults web3 uses to send transactions. If you don't specify one truffle
   * will spin up a development blockchain for you on port 9545 when you
   * run `develop` or `test`. You can ask a truffle command to use a specific
   * network from the command line, e.g
   *
   * $ truffle test --network <network-name>
   */

  networks: {
    // Useful for testing. The `development` name is special - truffle uses it by default
    // if it's defined here and no other network is specified at the command line.
    // You should run a client (like ganache-cli, geth or parity) in a separate terminal
    // tab if you use this network and you must also set the `host`, `port` and `network_id`
    // options below to some value.
    //
    // development: {
    //  host: "127.0.0.1",     // Localhost (default: none)
    //  port: 8545,            // Standard Ethereum port (default: none)
    //  network_id: "*",       // Any network (default: none)
    // },
    test: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*"
    },
    alfajores: {
      provider: kit.connection.web3.currentProvider, // CeloProvider
      network_id: 44787                   // latest Alfajores network id
    }

    // Another network with more advanced options...
    // advanced: {
      // port: 8777,             // Custom port
      // network_id: 1342,       // Custom network
      // gas: 8500000,           // Gas sent with each transaction (default: ~6700000)
      // gasPrice: 20000000000,  // 20 gwei (in wei) (default: 100 gwei)
      // from: <address>,        // Account to send txs from (default: accounts[0])
      // websockets: true        // Enable EventEmitter interface for web3 (default: false)
    // },

    // Useful for deploying to a public network.
    // NB: It's important to wrap the provider as a function.
    // ropsten: {
      // provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/YOUR-PROJECT-ID`),
      // network_id: 3,       // Ropsten's id
      // gas: 5500000,        // Ropsten has a lower block limit than mainnet
      // confirmations: 2,    // # of confs to wait between deployments. (default: 0)
      // timeoutBlocks: 200,  // # of blocks before a deployment times out  (minimum/default: 50)
      // skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
    // },

    // Useful for private networks
    // private: {
      // provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
      // network_id: 2111,   // This network is yours, in the cloud.
      // production: true    // Treats this network as if it was a public net. (default: false)
    // }
  },

  // Set default mocha options here, use special reporters etc.
  mocha: {
    // timeout: 100000
  },

  // Configure your compilers
  compilers: {
    solc: {
      // version: "0.5.1",    // Fetch exact version from solc-bin (default: truffle's version)
      // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
      // settings: {          // See the solidity docs for advice about optimization and evmVersion
      //  optimizer: {
      //    enabled: false,
      //    runs: 200
      //  },
      //  evmVersion: "byzantium"
      // }
    }
  }
}

gistfile2.txt

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;

contract HelloWorld {
  constructor() public {
  }
}

gistfile3.txt

var HelloWorld = artifacts.require('HelloWorld')

module.exports = function(deployer) {
  deployer.deploy(HelloWorld)
}

HelloWorld.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;

contract HelloWorld {
  constructor() public {
  }
}

truffle-config.js

/**
 * Use this file to configure your truffle project. It's seeded with some
 * common settings for different networks and features like migrations,
 * compilation and testing. Uncomment the ones you need or modify
 * them to suit your project as necessary.
 *
 * More information about configuration can be found at:
 *
 * truffleframework.com/docs/advanced/configuration
 */

const Web3 = require('web3')
const ContractKit = require('@celo/contractkit')
const web3 = new Web3('https://alfajores-forno.celo-testnet.org')
const kit = ContractKit.newKitFromWeb3(web3)
const getAccount = require('./getAccount').getAccount

async function awaitWrapper(){
    let account = await getAccount()
    kit.connection.addAccount(account.privateKey)
}
awaitWrapper()

module.exports = {
  /**
   * Networks define how you connect to your ethereum client and let you set the
   * defaults web3 uses to send transactions. If you don't specify one truffle
   * will spin up a development blockchain for you on port 9545 when you
   * run `develop` or `test`. You can ask a truffle command to use a specific
   * network from the command line, e.g
   *
   * $ truffle test --network <network-name>
   */

  networks: {
    // Useful for testing. The `development` name is special - truffle uses it by default
    // if it's defined here and no other network is specified at the command line.
    // You should run a client (like ganache-cli, geth or parity) in a separate terminal
    // tab if you use this network and you must also set the `host`, `port` and `network_id`
    // options below to some value.
    //
    // development: {
    //  host: "127.0.0.1",     // Localhost (default: none)
    //  port: 8545,            // Standard Ethereum port (default: none)
    //  network_id: "*",       // Any network (default: none)
    // },
    test: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*"
    },
    alfajores: {
      provider: kit.connection.web3.currentProvider, // CeloProvider
      network_id: 44787                   // latest Alfajores network id
    }

    // Another network with more advanced options...
    // advanced: {
      // port: 8777,             // Custom port
      // network_id: 1342,       // Custom network
      // gas: 8500000,           // Gas sent with each transaction (default: ~6700000)
      // gasPrice: 20000000000,  // 20 gwei (in wei) (default: 100 gwei)
      // from: <address>,        // Account to send txs from (default: accounts[0])
      // websockets: true        // Enable EventEmitter interface for web3 (default: false)
    // },

    // Useful for deploying to a public network.
    // NB: It's important to wrap the provider as a function.
    // ropsten: {
      // provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/YOUR-PROJECT-ID`),
      // network_id: 3,       // Ropsten's id
      // gas: 5500000,        // Ropsten has a lower block limit than mainnet
      // confirmations: 2,    // # of confs to wait between deployments. (default: 0)
      // timeoutBlocks: 200,  // # of blocks before a deployment times out  (minimum/default: 50)
      // skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
    // },

    // Useful for private networks
    // private: {
      // provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
      // network_id: 2111,   // This network is yours, in the cloud.
      // production: true    // Treats this network as if it was a public net. (default: false)
    // }
  },

  // Set default mocha options here, use special reporters etc.
  mocha: {
    // timeout: 100000
  },

  // Configure your compilers
  compilers: {
    solc: {
      // version: "0.5.1",    // Fetch exact version from solc-bin (default: truffle's version)
      // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
      // settings: {          // See the solidity docs for advice about optimization and evmVersion
      //  optimizer: {
      //    enabled: false,
      //    runs: 200
      //  },
      //  evmVersion: "byzantium"
      // }
    }
  }
}