How to test your self ethereum geth private poa truffle

Important!! web3.eth.sendTransaction({ data: bytecode

"certjson.bytecode" or "certjson.bytecode.object"

MUST Have "0x" at line First Character

Use Truffle

1. run https://www.trufflesuite.com/docs/truffle/quickstart

1-1. run command


mkdir testtruffle
cd testtruffle
npm i web3

truffle unbox metacoin
truffle test ./test/TestMetaCoin.sol
truffle test ./test/metacoin.js
truffle compile

2. modify truffle-config.js
Here use your private poa chain networkinfo. from address must be can used. genesis file can put this address.


module.exports = {
  // Uncommenting the defaults below 
  // provides for an easier quick-start with Ganache.
  // You can also follow this format for other networks;
  // see 
  // for more details on how to specify configuration options!
  //
  networks: {
    development: {
      host: "192.168.99.100",
      port: 8545,
      network_id: "*",
      from: "0x5921a4c1b13afbd4b61d63e9c7bd47741c47b176"
    },
  //  test: {
  //    host: "127.0.0.1",
  //    port: 7545,
  //    network_id: "*"
  //  }
  }
  
};

3. modify migrations/1_initial_migration.js

If account have password, remark some line to put password. Here example no password.

Import： importRawKey maybe run one time, get error msg "Error: Returned error: account already exists" then remark.

Import： if unlock failed, may be is geth new version need to add --allow-insecure-unlock


const Web3 = require('web3');
const TruffleConfig = require('../truffle-config.js');

const Migrations = artifacts.require("Migrations");

module.exports = function(deployer) {
  const config = TruffleConfig.networks.development;

  //if (process.env.ACCOUNT_PASSWORD) {
    const web3 = new Web3(new Web3.providers.HttpProvider('http://' + config.host + ':' + config.port));

    // maybe only run one time for geth
    // web3.eth.personal.importRawKey('d05bd152f3d71ff5f91830f3ccc1090fb670c7026ebf8c2136d4e5090d59398d', '')
    // web3.eth.personal.importRawKey('138cbbfb21686ddc3b5ffeb2cfc83491175af68319977acb81d0ae93392c626c', '')

    // if unlock failed, may be is geth new version need to add --allow-insecure-unlock 
    console.log('>> Unlocking account ' + config.from);
    // //web3.personal.unlockAccount(config.from, process.env.ACCOUNT_PASSWORD, 36000);
    web3.eth.personal.unlockAccount(config.from, '', 36000);
  //}

  console.log('>> Deploying migration');

  deployer.deploy(Migrations);
};


truffle migrate

4. run


truffle test

Why you need to do this, because you can run many test (open 3 or more command line run truffle test) on same time for test your private poa ethereum.

If see Error, next step.

5. modify test/metacoin.js check code like this:


const MetaCoin = artifacts.require("MetaCoin");

Check accounts who have coin then change balance 0 or 1 & account one or two.

contract('MetaCoin', (accounts) => {
  it('should put 10000 MetaCoin in the first account', async () => {
    const metaCoinInstance = await MetaCoin.deployed();
    console.log('\n accounts: %o\n', accounts);
    
    const balance0 = await metaCoinInstance.getBalance.call(accounts[0]);
    const balance1 = await metaCoinInstance.getBalance.call(accounts[1]);
    console.log('balance0: %s', balance0.valueOf());
    console.log('balance1: %s\n', balance1.valueOf());

    assert.equal(balance1.valueOf(), 10000, "10000 wasn't in the first account");
  });
  it('should call a function that depends on a linked library', async () => {
    const metaCoinInstance = await MetaCoin.deployed();
    const metaCoinBalance = (await metaCoinInstance.getBalance.call(accounts[0])).toNumber();
    const metaCoinEthBalance = (await metaCoinInstance.getBalanceInEth.call(accounts[0])).toNumber();

    assert.equal(metaCoinEthBalance, 2 * metaCoinBalance, 'Library function returned unexpected function, linkage may be broken');
  });
  it('should send coin correctly', async () => {
    const metaCoinInstance = await MetaCoin.deployed();

    // Setup 2 accounts.
    const accountOne = accounts[1];
    const accountTwo = accounts[0];

    // Get initial balances of first and second account.
    const accountOneStartingBalance = (await metaCoinInstance.getBalance.call(accountOne)).toNumber();
    const accountTwoStartingBalance = (await metaCoinInstance.getBalance.call(accountTwo)).toNumber();

    // Make transaction from first account to second.
    const amount = 10;
    await metaCoinInstance.sendCoin(accountTwo, amount, { from: accountOne });

    // Get balances of first and second account after the transactions.
    const accountOneEndingBalance = (await metaCoinInstance.getBalance.call(accountOne)).toNumber();
    const accountTwoEndingBalance = (await metaCoinInstance.getBalance.call(accountTwo)).toNumber();


    assert.equal(accountOneEndingBalance, accountOneStartingBalance - amount, "Amount wasn't correctly taken from the sender");
    assert.equal(accountTwoEndingBalance, accountTwoStartingBalance + amount, "Amount wasn't correctly sent to the receiver");
  });
});

===========

web3 private key unlock & create contract

createcontract.js methond 1


var fs  = require('fs');

var Web3 = require("web3");
var provider = new Web3.providers.HttpProvider("http://192.168.99.100:18545");
var web3 = new Web3(provider);

console.log("before web set account: %o", web3.eth.defaultAccount);
const privateKey = 'd05bd152f3d71ff5f91830f3ccc1090fb670c7026ebf8c2136d4e5090d59398d';
const account = web3.eth.accounts.privateKeyToAccount('0x' + privateKey);
web3.eth.accounts.wallet.add(account);
console.log("private key import to account: %o", account)
web3.eth.defaultAccount = account.address;

try {
    web3.eth.personal.unlockAccount(account.address, "").then(console.log('Account unlocked!'));
} catch (err) {
    console.error('web3 unlockAccount Error: %o', err);
}

var certjson;
var certjsonpath = './Cert.json';

try {
    certjson = JSON.parse(fs.readFileSync(certjsonpath));
} catch (err) {
    console.error('readFileSync Error: %o', err);
}

const certContract = new web3.eth.Contract(certjson.abi);
certContract.options.data = certjson.bytecode;
certContract.options.from = '0x5921a4C1B13afbD4b61d63e9c7BD47741C47B176'
certContract.options.gas = '4700000'

console.log("web3 version: %o", web3.version)
web3.eth.getAccounts().then(o=>{console.log("Accounts: %o", o)})

certContract.deploy().send()
.on('error', (error) => {
    console.log("error: %o", error)
})
.on('transactionHash', (transactionHash) => {
    console.log("transactionHash: %o", transactionHash)
})
.on('receipt', (receipt) => {
    // receipt will contain deployed contract address
    console.log("receipt: %o", receipt)
    console.log("receipt.contractAddress: %o", receipt.contractAddress) 
})
.on('confirmation', (confirmationNumber, receipt) => {
    console.log("confirmationNumber: %o", confirmationNumber)
    console.log("confirmation receipt: %o", receipt)
})
.then(function(newContractInstance){
    if (typeof newContractInstance.options.address !== 'undefined') {
        console.log('Contract mined! address: ' + newContractInstance.options.address);
    }else{
        console.log("newContractInstance.address is undefined!")
    }
});

createcontract.js methond 2


var fs  = require('fs');

var Web3 = require("web3");
var provider = new Web3.providers.HttpProvider("http://192.168.99.100:18545");
var web3 = new Web3(provider);

console.log("before web set account: %o", web3.eth.defaultAccount);
const privateKey = 'd05bd152f3d71ff5f91830f3ccc1090fb670c7026ebf8c2136d4e5090d59398d';
const account = web3.eth.accounts.privateKeyToAccount('0x' + privateKey);
web3.eth.accounts.wallet.add(account);
console.log("private key import to account: %o", account)
web3.eth.defaultAccount = account.address;

try {
    web3.eth.personal.unlockAccount(account.address, "").then(console.log('Account unlocked!'));
} catch (err) {
    console.error('web3 unlockAccount Error: %o', err);
}

var certjson;
var certjsonpath = './Cert.json';

try {
    certjson = JSON.parse(fs.readFileSync(certjsonpath));
} catch (err) {
    console.error('readFileSync Error: %o', err);
}

const certContract = new web3.eth.Contract(certjson.abi);
certContract.options.data = certjson.bytecode;
certContract.options.from = '0x5921a4C1B13afbD4b61d63e9c7BD47741C47B176'
certContract.options.gas = '4700000'

console.log("web3 version: %o", web3.version)
web3.eth.getAccounts().then(o=>{console.log("Accounts: %o", o)})

// 怖署合約
var TxHash;

console.log("######## promise all ##############");

const getNonce = () => {
    return new Promise((resolve, reject) => {
        web3.eth.getTransactionCount(web3.eth.defaultAccount, (error, result) => {
            if(error) reject(error);
            resolve(web3.utils.toHex(result));
        })
    })
}

const getGasPrice = () => {
    return new Promise((resolve, reject) => {
        web3.eth.getGasPrice((error, result) => {
            if(error) reject(error);
            resolve(web3.utils.toHex(result));
        })
    })
}

// const sendRawTransaction = (rawTx) => {
//     const privateKey = "d05bd152f3d71ff5f91830f3ccc1090fb670c7026ebf8c2136d4e5090d59398d";
//     const tx = new Tx(rawTx);
//     const privateKeyBuffer = Buffer.from(privateKey, 'hex');
//     tx.sign(privateKeyBuffer);
//     const serializedTx = tx.serialize();
//     web3.eth.sendRawTransaction('0x' + serializedTx.toString('hex'), function(err, hash) {
//         console.log('Error:', err);
//         console.log('Hash:', hash);
//     });
// }
  
Promise.all([getNonce(), getGasPrice()]).then(values => {
    // const rawTx = {
    //     to: '0x203D17B4a1725E001426b7Ab3193E6657b0dBcc6',
    //     gasLimit: web3.toHex(1000000),
    //     value: web3.toHex(web3.toWei('0.1', 'ether')),
    //     nonce: values[0],
    //     gasPrice: values[1]
    // };
    // console.log(rawTx);
    // return(rawTx);

       console.log("nonce: %s", web3.utils.hexToNumber(values[0]));
       console.log("GasPrice: %s", web3.utils.hexToNumber(values[1]));

       web3.eth.estimateGas({from: "0x5921a4C1B13afbD4b61d63e9c7BD47741C47B176",data: contractjson.bytecode.object}).then(o=>{console.log("estimateGas: %o", o);})

    web3.eth.sendTransaction({
        from: "0x5921a4C1B13afbD4b61d63e9c7BD47741C47B176", // web3.eth.coinbase,  // web3.eth.getAccounts() 第一筆
        data: certjson.bytecode,
        nonce: values[0],
        gasPrice: values[1],
        gas: 4700000
    }).then(o=>{
        console.log("txhash object: %o", o); 
        TxHash = o.transactionHash;
        console.log("TxHash: %o", TxHash)
    
        web3.eth.getTransactionReceipt(TxHash).then(o=>{
            console.log("check contractAddress object: %s", o.contractAddress); 
        });    
    })
    .catch(e => console.log("sendTransaction error: %o", e));
})
.then(console.log("create transaction ok!"))
.catch(e => console.log("promise all error: %o", e))


node createcontract.js

===========
every 10sec create contract

First: fixed contract


pragma solidity >=0.4.25 <0.7.0;


contract MetaCoin {
 mapping (address => uint) balances;

 event Transfer(address indexed _from, address indexed _to, uint256 _value);

 constructor() public {
  balances[msg.sender] = 10000;
 }

 function sendCoin(address receiver, uint amount) public returns(bool sufficient) {
  if (balances[msg.sender] < amount) return false;
  balances[msg.sender] -= amount;
  balances[receiver] += amount;
  emit Transfer(msg.sender, receiver, amount);
  return true;
 }

 function getBalance(address addr) public view returns(uint) {
  return balances[addr];
 }
}

Promise.all method & web3.eth.sendTransaction


var fs  = require('fs');

var Web3 = require("web3");
var provider = new Web3.providers.HttpProvider("http://192.168.99.100:18545");
var web3 = new Web3(provider);

console.log("before web set account: %o", web3.eth.defaultAccount);
const privateKey = '138cbbfb21686ddc3b5ffeb2cfc83491175af68319977acb81d0ae93392c626c';
const account = web3.eth.accounts.privateKeyToAccount('0x' + privateKey);
web3.eth.accounts.wallet.add(account);
console.log("private key import to account: %o", account.address)
web3.eth.defaultAccount = account.address;

try {
    web3.eth.personal.unlockAccount(account.address, "").then(console.log('Account unlocked!'));
} catch (err) {
    console.error('web3 unlockAccount Error: %o', err);
}

var contractjson;
var contractjsonpath = './MetaCoin.json';

try {
    contractjson = JSON.parse(fs.readFileSync(contractjsonpath));
} catch (err) {
    console.error('readFileSync Error: %o', err);
}

const getNonce = () => {
    return new Promise((resolve, reject) => {
        web3.eth.getTransactionCount(web3.eth.defaultAccount, (error, result) => {
            if(error) reject(error);
            resolve(web3.utils.toHex(result));
        })
    })
}

const getGasPrice = () => {
    return new Promise((resolve, reject) => {
        web3.eth.getGasPrice((error, result) => {
            if(error) reject(error);
            resolve(web3.utils.toHex(result));
        })
    })
}

Promise.all([getNonce(), getGasPrice()]).then(values => {
    console.log("values: Nonce %s  GasPrice %s", web3.utils.hexToNumber(values[0]), web3.utils.hexToNumber(values[1]));
}).then(console.log("create transaction ok!"))
.catch(e => console.log("promise all error: %o", e))

setInterval( () => {

Promise.all([getNonce(), getGasPrice()]).then(values => {
    console.log("nonce: %s", web3.utils.hexToNumber(values[0]));
    console.log("GasPrice: %s", web3.utils.hexToNumber(values[1]));
   
   web3.eth.estimateGas({from: "e79d33e93bd888b35e055f1a12d876354729037b",data: contractjson.bytecode.object}).then(o=>{console.log("estimateGas: %o", o);})

    web3.eth.sendTransaction({
        from: "e79d33e93bd888b35e055f1a12d876354729037b", // web3.eth.coinbase,  // web3.eth.getAccounts() 第一筆
        data: contractjson.bytecode.object,
        nonce: values[0],
        gasPrice: 20000000000, //20,000,000,000
        gas: 181949 //181,949
    }).then(o=>{
        console.log("txhash object: %o", o); 
        TxHash = o.transactionHash;
        console.log("TxHash: %o", TxHash)
    
        web3.eth.getTransactionReceipt(TxHash).then(o=>{
            console.log("check contractAddress object: %s", o.contractAddress); 
        });    
    })
    .catch(e => console.log("sendTransaction error: %o", e.message));
})
.then(console.log("create transaction ok!"))
.catch(e => console.log("promise all error: %o", e.message))

}, Math.random() * 10000);

every 5sec create contract & web3 contract method


var fs  = require('fs');

var Web3 = require("web3");
var provider = new Web3.providers.HttpProvider("http://192.168.99.100:18545");
var web3 = new Web3(provider);

console.log("before web set account: %o", web3.eth.defaultAccount);
const privateKey = '138cbbfb21686ddc3b5ffeb2cfc83491175af68319977acb81d0ae93392c626c';
const account = web3.eth.accounts.privateKeyToAccount('0x' + privateKey);
web3.eth.accounts.wallet.add(account);
console.log("private key import to account: %o", account.address)
web3.eth.defaultAccount = account.address;

try {
    web3.eth.personal.unlockAccount(account.address, "").then(console.log('Account unlocked!'));
} catch (err) {
    console.error('web3 unlockAccount Error: %o', err);
}

var contractjson;
var contractjsonpath = './MetaCoin.json';

try {
    contractjson = JSON.parse(fs.readFileSync(contractjsonpath));
} catch (err) {
    console.error('readFileSync Error: %o', err);
}

setInterval( () => {

contractAddr = "0x46Fac13Ca8398545479bF2DA18133Aa87377b559";
contractfrom = "0xe79d33e93bd888b35e055f1a12d876354729037b";
coinOwnerAddr = "0xe79d33e93bd888b35e055f1a12d876354729037b"
sendCointoAddr = "0x5921a4C1B13afbD4b61d63e9c7BD47741C47B176";

var metacoinContract = new web3.eth.Contract(contractjson.abi, contractAddr);

metaCoinContract.methods.getBalance(coinOwnerAddr).call({
    from: contractfrom,
    gasPrice: 20000000000, //20,000,000,000
    gas: 181949
})
.then(o=>{console.log(coinOwnerAddr+" getBalance: %o", o)});

metaCoinContract.methods.sendCoin(sendCointoAddr, 10).send({
    from: contractfrom,
    gasPrice: 20000000000, //20,000,000,000
    gas: 181949
})
.then(o=>{console.log("sendCoin: %o", o)});

metaCoinContract.methods.getBalance(sendCointoAddr).call({
    from: contractfrom,
    gasPrice: 20000000000, //20,000,000,000
    gas: 181949
})
.then(o=>{console.log(sendCointoAddr+" getBalance: %o", o)});

}, Math.random() * 5000);

// .on('transactionHash', function(transactionHash){
//     console.log("transactionHash: %o", transactionHash)
// })
// .on('receipt', function(receipt){
//     console.log("receipt: %o", receipt)
//     console.log("receipt.contractAddress: %o", receipt.contractAddress) 
// })
// .on('confirmation', function(confirmationNumber, receipt){
//     console.log("confirmationNumber: %o", confirmationNumber)
//     console.log("confirmation receipt: %o", receipt)
// })
// .on('error', function(error){console.log("error: %o", error.message)});

=====
https://medium.com/finnovate-io/how-do-i-sign-transactions-with-web3-f90a853904a2
https://ethereum.stackexchange.com/questions/60611/defining-the-transaction-object-for-offline-transaction-signing-using-web3-js-f
https://github.com/ethereum/web3.js/issues/1430

https://programtheblockchain.com/posts/

sueboy

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