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I need some help in understanding how.
Zebi.io works.! Technically..
It's a private blockchain on ethereum.
It's stores land titles & registries on blockchain..and retrieves whenever needed.!
How is this done.?
Thankx in advance
It is really bad to install wallet in win10 system for a week.
Is anybody knows where i can find the list of ERC standards accepted by ethereum community ?
@davide6600 set visibility as public or private or internal
I have one new site just online 24 days minimim deposit 30usd profit 10% per day and paying
Luís Correia
Hi everyone! I'm getting annoyed by this specific message: "[solc] Expected identifier, got 'LParen'"
but this is just wrong cuz I can perfectly compile and deploy the contract
still my vscode shows me this..
has anyone encountered this before?
contract TokenERC20 {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply;
I am playing around with this code with the ERC20 token, can someone help me now what are rge changes I need to do with this variables

Hello, I cannot realize the "auto refill" of gas, I have tried it for days. But it doesn't work. I copied it from the website of Ethereum:
uint public minBalanceForAccounts;

function setMinBalance(uint minimumBalanceInFinney) onlyOwner {
     minBalanceForAccounts = minimumBalanceInFinney * 1 finney;

Then, add this line to the transfer function so that the sender is refunded:

/* Send coins */
function transfer(address _to, uint256 _value) {
    if(msg.sender.balance < minBalanceForAccounts)
        sell((minBalanceForAccounts - msg.sender.balance) / sellPrice);

Can someone help me? Thanks a lot in advance!

Hi folks.new to this technology
looking for some guideance to start ethereum DAPP.any help will be appreciated
hi, im trying to understand how to create a criptocoin in ropsten or rinkeby but how I can have ethereum to create it
hi, i cannot connect to rinkeby network from my ethereum wallet
Qiao Liang

difference with or without emit ?

/* Notify anyone listening that this transfer took place */
        Transfer(msg.sender, _to, _value);


/* Notify anyone listening that this transfer took place */
        emit Transfer(msg.sender, _to, _value);
Qiao Liang
argh... got it.. emit is required for newer version of solidity..
Satyajit Deshmukh
Hello all
Can I store patient record on blockchain using smart contract.. I tried but it required huge amount of gas... Is any other way to do it.. and over come out of gas problem
Satyajit Deshmukh
Please reply if anyone know this
@Jeet21 probably not. Everything on the blockchain is readable by anyone, so I don't think you would want to put any patient info onto the blockchain. What sort of information (and how much) were you thinking of storing? For large objects, a common approach is to store a reference to the data that is actually stored somewhere else (e.g. a URL or an IPFS hash).
Satyajit Deshmukh
I want store full patient record with his operation history , allergies , Medical problem etc..
Now I am trying with ipfs and etherum .. any tutorial or link to follow
On more problem .. how can I read transactions from block
Priyabrata Dash
for your address you can read
also ipfs is also may not be a full proof option .... for storing medical records
Satyajit Deshmukh
So what will be the right option other than ipfs?
Priyabrata Dash
depends on the scope of your application
Satyajit Deshmukh
Still can u tell options so that I can explore more
check this answer this will give some idea
Satyajit Deshmukh
Ok I will check thankx
Satyajit Deshmukh
0: string: satyea
1: string: {"sex":"female","profileImagePath":"","fname":"satyajit21","mname":"s2","lname":"d1","DOB":"2018-05-01","profile_image":"","usertext1":"t12sss2st"}
2: string: {"country_code":"IND","state":"MH","city":"pune","postal_code":"411046","street":"katraj","phone_cell":"9823412295","myfamilydoctors":"undefined","primary_emercontact_fname":"sdasad","primary_emercontact_lname":"undefined","emergency_contact":"8793387128","primary_emercontact_relation":"Father"}
i declare 3 variables and store this data
it works on remix but when i use web3 for my application and update this data it gives me out of gas error..
want to learn solidity. any ideas where to start
Satyajit Deshmukh
Best place to learn is crypto zombies
And cusetro videos on you tube
Hello. Can someone help me with error in code? Trying to deploy that in testnet https://www.ethereum.org/dao
Is this all error coz of bersion or?
Hey everyone! I dont understand one thing about the ethereum.org/crowdsale tutorial: How does the 'crowdsale' contract have the balance to transfer all these tokens to the buyers? Doesn't it initially have a 0 balance just like any other address?