solid

solid

pragma solidity 0.5.3;

contract HelloWorld{
    string public text;
    uint public number;
    address public userAddress;
    bool public answer;
    mapping (address => uint) public hasInteracted;

    function setText(string memory myText) public {
        text = myText;
        setInteracted();
    }

    function setNumber(uint myNumber) public payable{
        require(msg.value >= 1 ether, "Insuficiente ETH sent.");
        number = myNumber;
        setInteracted();
    }

    function setUserAddress() public {
        userAddress = msg.sender;
        setInteracted();
    }

    function setAnswer(bool trueOrFalse) public {
        answer = trueOrFalse;
        setInteracted();
    }

    function setInteracted() private {
        hasInteracted[msg.sender] += 1;
    }

    function sendETH(address payable targetAddress) public payable{
        targetAddress.transfer(msg.value);
    }

    //padrão de saques
    function withdraw() public {
        require(balances[msg.sender] > 0, "Insufficient funds.");

        uint amount = balances[msg.sender];
        balances[msg.sender] = 0;
        msg.sender.transfer(amount); 
    }

    function sum(uint num1, uint num2) public pure returns(uint) {
        return num1 + num2;
    }

    function sumStored(uint num1) public     view returns(uint){
        return num1 + number;
    }
}

//teste https://remix.ethereum.org/

//funcoes pure são gratis, não altera, nem consulta valores da blockchain
//funcoes view ja faz consulta de alguma parametro da blockchain

//operaçõe
// (*) vezes
// (/) divisão
// (**) potencia



web3.eth.getAccounts();
web3.eth.accounts.create();
web3.eth.accounts.privateKeyToAccount('chave');

web3.eth.personal.newAccount()

 web3.eth.personal.unlockAccount("0xd2439CD82dCC520D25DF57f09C209de068ad39e9")
web3.eth.defaultAccount = '0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe';


web3.eth.defaultAccount = web3.eth.personal.getAccounts()[1];

let accounts = await web3.eth.getAccounts()

--rpcapi "eth,net,web3,personal"


função rawTransaction
var Tx = require('ethereumjs-tx');
var privateKey = new Buffer('e331b6d69882b4cb4ea581d88e0b604039a3de5967688d3dcffdd2270c0fd109','hex')

var rawTx = {
  nonce: '0x00',
  gasPrice: '0x09184e72a000', 
  gasLimit: '0x2710',
  to: '0x0000000000000000000000000000000000000000', 
  value: '0x00', 
  data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
}

var tx = new Tx(rawTx);
tx.sign(privateKey);

var serializedTx = tx.serialize();

//console.log(serializedTx.toString('hex'));
//0xf889808609184e72a00082271094000000000000000000000000000000000000000080a47f74657374320000000000000000000000000000000000000000000000000000006000571ca08a8bbf888cfa37bbf0bb965423625641fc956967b81d12e23709cead01446075a01ce999b56a8a88504be365442ea61239198e23d1fce7d00fcfc5cd3b44b7215f

web3.eth.sendRawTransaction(serializedTx.toString('hex'), function(err, hash) {
  if (!err)
    console.log(hash); // "0x7f9fade1c0d57a7af66ab4ead79fade1c0d57a7af66ab4ead7c2c2eb7b11a91385"
});



var addr1 = "xxxxx"
var pKey1 = "xxxx"

var addr2 = "xxxxx"


var rawTx = {
nonce: web3.toHex(web3.eth.getTransactionCount(addr1)),
to: addr2,
gasPrice: web3.toHex(21000000000),
gasLimit: web3.toHex(21000),
value: web3.toHex(web3.toWei(1, 'ether')),
data: ""
}


var pKey1x = new Buffer(pkey1, 'hex')

//console.log(pKey1x);
//console.log(pKey1x.toString('hex'));

var tx = new EthTx(rawTx);

tx.sign(pKey1x);
    

var serializedTx = tx.serialize();

//console.log(serializedTx.toString('hex'));


web3.eth.sendRawTransaction(serializedTx.toString('hex'),);

//web3.eth.sendRawTransaction(serializedTx.toString('hex'), function(err, hash) {
//  if (!err)
//    console.log(hash); // "0x7f9fade1c0d57a7af66ab4ead79fade1c0d57a7af66ab4ead7c2c2eb7b11a91385"
//});