Basic-eth

To demonstrate how to deploy a basic contract to ethereum testnet. Two deployment methods are demonstrated: script and truffle console.

Prerequsites

The followings are required on then development machine:

Nodejs
Python
Ganache; local ethereum virtual machine (EVM)
Truffle; development tool
Register with Infura
- To connect to the ethereum or IPFS public network, you need to setup a self-hosted node for ethereum or IPFS, respectively; alternative use the cloud node provided by vendors like: infura, moralis, etc.
- Infura provides access to the ethereum & IPFS public networks (testnet or mainnet) via https or websocket, and faster & scalable
Install fs and HDWalletProvider

npm init
npm install fs
npm install @truffle/hdwallet-provider

References

Ethereum Public network details

Networks

mainnet
testnet:
- ropsten: id: 3; POW
- rinkeby: id: 4; POA
- kovan: id: 42; POA
- binance??

Faucets

Faucet is used to get ether for testnet environments. Need to use the browser with wallet plugin.

Explorer

Deploying to local EVM and testnet

Two deployment methods will be demonstrated: script and truffle console.

deploy using script to local EVM (ganache)

ensure the contract has been compiled
create deploy script in the migrations folder, let's say 2_deploy_contracts.js
revised truffle-config.js to uncomment & configure networks: {development: {}
ensure ganache is running
deploy the contract

truffle migrate

manual test using truffle console:

truffle console
truffle(development)> instance = await Purpose.deployed()
truffle(development)> instance
truffle(development)> instance.purpose.call()
truffle(development)> instance.setPurpose("hello")

deploy using script to testnet

ensure the contract has been compiled
create deploy script in the migrations folder, let's say 2_deploy_contracts.js

revised truffle-config.js as follows:

uncomment wallet & configure:

const HDWalletProvider = require('@truffle/hdwallet-provider');
const fs = require('fs');
const secrets = JSON.parse(fs.readFileSync(".secrets.json").toString().trim());

uncomment & configure networks: {ropsten: {}}

create .secret.json file
- mnemonic is that of the metamask wallet
- metamask plugin to the firefox browser was used at the time of this development
- to see the metamask mnemonic, go to: My Account > Settings > Security & Privacy > click Reveal Secret Recovery Phrase > (enter password)
ensure fs and HDWalletProvider have been installed, otherwise:

npm install fs
npm install @truffle/hdwallet-provider

Next, deploy; see "2022, May 06 deployment to ropsten"

truffle migrate --network ropsten

References: (1.), (2.)

2022, May 06 deployment to ropsten

Go to Etherscan testnet ropsten
Search for
- transaction hash: 0xc22ef15085b7d72a6b4240950d6870794c5367305d33212a798684ba835391c6
Deployment console output

MacBook-Pro:basic-eth gt$ truffle migrate --network ropsten

Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.


Starting migrations...
======================
> Network name:    'ropsten'
> Network id:      3
> Block gas limit: 8000000 (0x7a1200)


1_initial_migration.js
======================

   Deploying 'Migrations'
   ----------------------
   > transaction hash:    0x372206153a644a79ab437ccd4709ed6ddc89ca1db8b7023340c1e9fdba1d7493
   > Blocks: 1            Seconds: 52
   > contract address:    0x0a7FBF4a782C47C87D05BEe0Dd04Cd19f662720D
   > block number:        12243305
   > block timestamp:     1651862894
   > account:             0x3D412Cc911A2209a4C39f1e66B46EECdE7cE3C64
   > balance:             11.299516892497101355
   > gas used:            193243 (0x2f2db)
   > gas price:           2.500000015 gwei
   > value sent:          0 ETH
   > total cost:          0.000483107502898645 ETH

   Pausing for 2 confirmations...

   -------------------------------
   > confirmation number: 1 (block: 12243306)
   > confirmation number: 2 (block: 12243307)
   > Saving migration to chain.
   > Saving artifacts
   -------------------------------------
   > Total cost:     0.000483107502898645 ETH


2_deploy_contracts.js
=====================

   Deploying 'Purpose'
   -------------------
   > transaction hash:    0xc22ef15085b7d72a6b4240950d6870794c5367305d33212a798684ba835391c6
   > Blocks: 1            Seconds: 40
   > contract address:    0xbF7344dfA95eEf2427102BAfbe3FB107F6Ff18CB
   > block number:        12243309
   > block timestamp:     1651863046
   > account:             0x3D412Cc911A2209a4C39f1e66B46EECdE7cE3C64
   > balance:             11.298655539991588699
   > gas used:            298803 (0x48f33)
   > gas price:           2.500000016 gwei
   > value sent:          0 ETH
   > total cost:          0.000747007504780848 ETH

   Pausing for 2 confirmations...

   -------------------------------
   > confirmation number: 1 (block: 12243310)
   > confirmation number: 2 (block: 12243311)
   > Saving migration to chain.
   > Saving artifacts
   -------------------------------------
   > Total cost:     0.000747007504780848 ETH

Summary
=======
> Total deployments:   2
> Final cost:          0.001230115007679493 ETH

MacBook-Pro:basic-eth gt$

Manual test using truffle console

$truffle console
truffle(development)> instance = await Purpose.deployed()
truffle(development)> instance
truffle(development)> instance.purpose.call()
truffle(development)> instance.setPurpose("hello")

deploy using truffle console

In addition to the main "Prerequsites" above, there are prerequsites set in the "deploy using script to testnet" that are needed, in case they have not been setup:
- ensure the contract has been compiled
- revised truffle-config.js as follows:
  - uncomment wallet & configure:
```
const HDWalletProvider = require('@truffle/hdwallet-provider');
const fs = require('fs');
const secrets = JSON.parse(fs.readFileSync(".secrets.json").toString().trim());
```
- uncomment & configure networks: {ropsten: {}}
- create .secret.json file
  - mnemonic is that of the metamask wallet
  - metamask plugin to the firefox browser was used at the time of this development
  - to see the metamask mnemonic, go to: My Account > Settings > Security & Privacy > click Reveal Secret Recovery Phrase > (enter password)
- ensure fs and HDWalletProvider have been installed
NOTE: we have deployed to ropsten earlier using the script, see above
- Otherwise, enter truffle console, and migrate; this is the same as truffle migrate and using the same truffle-config.js file.
```
truffle console --network ropsten
truffle(ropsten)> migrate
```

Next, manually check the deployed contract

First check the connected wallet; the wallet is configured in the truffle-config.js file; using the mnemonic and the HDWalletProvider.
Note: this is the mnemonic copied from the metamask plugin to the firefox browser that was used at the time of this development. There was one account created & shown in the metamask plugin at the time; additional accounts can be created.
the public key (address) of the account is '0x3D412Cc911A2209a4C39f1e66B46EECdE7cE3C64'.
To see the metamask mnemonic, go to: My Account > Settings > Security & Privacy > click Reveal Secret Recovery Phrase > (enter password). WARNING: keep secret!!!
Checking the wallet accounts. NOTE: the account shown on metamask plugin is the first account. Question: it seems that there are ten accounts automatically created for the wallet as shown below. Wondering if a new account is created in the metamask plugin that it will have the second public key (address)?? to be investigated

truffle(ropsten)> await web3.eth.getAccounts()
[
  '0x3D412Cc911A2209a4C39f1e66B46EECdE7cE3C64',
  '0xf37d8fB6144A91Fdf842b0383c3AbCDbdca91Af7',
  '0x70f29BB5745De2D5cA21c4af59d9CD4E860E3A8f',
  '0xA80f95442BEf083582142775b4B8665E49D4318C',
  '0x2269323ab1Af70E62Ec44d3a97395752648D05B9',
  '0xB9F2AcdE75C27492FcC927897b5B83D60A0B4bE5',
  '0xC7B72F7C43dDb91c163526134cD96EE3e6E19cD1',
  '0xDC33318e78AEe4347187eF47ee8c5598Ba80E862',
  '0xa95529b48b145f50E96c98f46f56380535DA7bad',
  '0x999E45727B0d4db2c9Ca21d5CaA53C93D05592DE'
]

Check balance for account 1:

truffle(ropsten)> await web3.eth.getBalance("0x3D412Cc911A2209a4C39f1e66B46EECdE7cE3C64")
'11298583944991101853'

Interact with the deployed contract

truffle(ropsten)> let instance = await Purpose.deployed()
undefined
truffle(development)> instance.address
'0xbF7344dfA95eEf2427102BAfbe3FB107F6Ff18CB'
truffle(ropsten)> instance.purpose.call()
'Basic Apps!!!'

Set the purpose; this transaction costs ether

truffle(development)> instance.setPurpose("hello")
{
  tx: '0xc7b2cde0dcf3361477f3d5d3e62da3bb3d73d1d68220301e39f12e2d96d93f9f',
  receipt: {
    blockHash: '0xf546d2e10876b225c8f70838b8f1d93d37d2a3234430b7fd90d2dcf9da1b4d8c',
    blockNumber: 12246726,
    contractAddress: null,
    cumulativeGasUsed: 536590,
    effectiveGasPrice: '0x9502f908',
    from: '0x3d412cc911a2209a4c39f1e66b46eecde7ce3c64',
    gasUsed: 75211,
    logs: [ [Object] ],
    logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000002080000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400',
    status: true,
    to: '0xbf7344dfa95eef2427102bafbe3fb107f6ff18cb',
    transactionHash: '0xc7b2cde0dcf3361477f3d5d3e62da3bb3d73d1d68220301e39f12e2d96d93f9f',
    transactionIndex: 6,
    type: '0x2',
    rawLogs: [ [Object] ]
  },
  logs: [
    {
      address: '0xbF7344dfA95eEf2427102BAfbe3FB107F6Ff18CB',
      blockHash: '0xf546d2e10876b225c8f70838b8f1d93d37d2a3234430b7fd90d2dcf9da1b4d8c',
      blockNumber: 12246726,
      logIndex: 9,
      removed: false,
      transactionHash: '0xc7b2cde0dcf3361477f3d5d3e62da3bb3d73d1d68220301e39f12e2d96d93f9f',
      transactionIndex: 6,
      id: 'log_0554be71',
      event: 'SetPurpose',
      args: [Result]
    }
  ]
} 
truffle(ropsten)> instance.purpose.call()
'GT first contract on ethereum testnet'
truffle(ropsten)> await web3.eth.getBalance("0x3D412Cc911A2209a4C39f1e66B46EECdE7cE3C64")
'11298395917490500165'

References: (1.), (2.), and (3.)

MISC info, how-to for place holder for now

[how-to] create private key for

MacBook-Pro:basic-eth gt$ npx mnemonics
Need to install the following packages:
  mnemonics
Ok to proceed? (y) y
march kidney rough gauge remind bachelor soap satoshi cigar tired basket offer

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
contracts		contracts
migrations		migrations
test		test
.DS_Store		.DS_Store
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
package-lock.json		package-lock.json
package.json		package.json
truffle-config.js		truffle-config.js

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Basic-eth

Prerequsites

References

Ethereum Public network details

Networks

Faucets

Explorer

Deploying to local EVM and testnet

deploy using script to local EVM (ganache)

deploy using script to testnet

2022, May 06 deployment to ropsten

deploy using truffle console

MISC info, how-to for place holder for now

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Basic-eth

Prerequsites

References

Ethereum Public network details

Networks

Faucets

Explorer

Deploying to local EVM and testnet

deploy using script to local EVM (ganache)

deploy using script to testnet

2022, May 06 deployment to ropsten

deploy using truffle console

MISC info, how-to for place holder for now

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