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Author Topic: [ANN] (QTUM) - A Scalable Smart Contract Platform w/ Proof of Stake  (Read 432223 times)
This is a self-moderated topic. If you do not want to be moderated by the person who started this topic, create a new topic. (2 posts by 2 users deleted.)
[ProTrader]
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June 28, 2017, 01:24:12 AM
 #4221

Stop spamming this shitcoin via PM to everyone. Roll Eyes

These spam messages were not sent from anyone on the Qtum team, or anyone we hired. Please report them to the moderators.

Then, who did it by spending a lot time on PM everyone?

Please tell me his name is Leifeng.


lol. great excuse from Quanshit team. Bad move guyz, next time please dont do it again kiddoz!!

 

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June 28, 2017, 01:56:20 AM
 #4222

Qtum will be the first POS smart contact  platform.

one Qtum will worth 50$ in one year.


great news! I'm in! good luck all people, who joined this campaigns.

I'm long term investor in this project would like to see this when it will happen. Qtum is bringing something great in crypto universe which is truly awesome so it set new standard for smart contracts with this totally new platform.


i dont see it will happen in one year, maybe 2-3 year untill people realized how good qtum is..

pos coin is good bacause it is reduce the electricity cost.


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June 28, 2017, 02:54:33 AM
Last edit: June 28, 2017, 03:32:18 AM by Qtum
 #4223

reserved

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀█ Qtum █▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
●▬●▬●▬● First UTXO Based PoS Smart Contract and DAPP Platform ●▬●▬●▬●
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June 28, 2017, 03:32:43 AM
 #4224

The Qtum Test Network Has Been Released:









Instructions on how to compile from source are listed in the Git. Please see the documentation provided:

Code:

Quickstart

Build on Ubuntu

This is a quick start script for compiling Qtum on  Ubuntu


sudo apt-get install build-essential libtool autotools-dev automake pkg-config libssl-dev libevent-dev bsdmainutils git cmake libboost-all-dev
sudo apt-get install software-properties-common
sudo add-apt-repository ppa:bitcoin/bitcoin
sudo apt-get update
sudo apt-get install libdb4.8-dev libdb4.8++-dev

# If you want to build the Qt GUI:
sudo apt-get install libqt5gui5 libqt5core5a libqt5dbus5 qttools5-dev qttools5-dev-tools libprotobuf-dev protobuf-compiler

git clone https://github.com/qtumproject/qtum
cd qtum
# Update cpp-ethereum submodule
git submodule update --init --recursive

# Note autogen will prompt to install some more dependencies if needed
./autogen.sh
./configure
make -j2







Qtum Sparknet Usage and Information


Please see: https://github.com/qtumproject/qtum/blob/testnet-1/doc/sparknet-guide.md



Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, but with support for Ethereum Virtual Machine based smart contracts. It achieves this through the revolutionary Account Abstraction Layer. For more general information about Qtum as well as links to join our community, go to https://qtum.org



Welcome to Qtum Sparknet, the first public testnet for the Qtum blockchain. Sparknet is designed primarily for developers, and as such documentation at this point will be technical and suited more for developers. The mainnet is expected to be released in September and will be suited for the general public. Testnet tokens do not hold any value and should not be traded for any monetary instruments. The testnet can be reset or forked at anytime as deemed necessary for development. Sparknet does not include support for Mutualized Proof Of Stake, or for the Decentralized Governance Protocol. Both of these features are implemented, and their code is available on alternative branches (check the pull requests), but have not been tested and proven stable enough to include in this testnet. They will be implemented in the 2nd public testnet for Qtum.




Using Smart Contracts with Qtum





The smart contract interface in Qtum still requires some technical knowledge. The GUI is not completed yet, so all smart contract interation must happen either using qtum-cli at the command line, or in the debug window of qtum-qt.

To demonstrate how to deploy and interact with a simple we will use this contract:


Code:
pragma solidity ^0.4.0;

contract QtumTest {
   uint storedNumber;
   function QtumTest() {
       storedNumber=1;
   }
   function setNumber(uint number) public{
       storedNumber = number;
   }
   function logNumber() constant public{
        log1("storedNumber", uintToBytes(storedNumber));
   }
   function returnNumber() constant public returns (uint){
       return storedNumber;
   }
   function deposit() public payable{
   }
   function withdraw() public{
       if(!msg.sender.send(this.balance)){
           throw;
       }
   }
   //utility function
   function uintToBytes(uint v) constant returns (bytes32 ret) {
       if (v == 0) {
           ret = '0';
       }
       else {
           while (v > 0) {
               ret = bytes32(uint(ret) / (2 ** 8));
               ret |= bytes32(((v % 10) + 48) * 2 ** (8 * 31));
               v /= 10;
           }
       }
       return ret;
   }
}



It compiles to the following EVM bytecode



Code:
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
And finally, has the following JSON interface file:

[{"constant":true,"inputs":[],"name":"returnNumber","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"withdraw","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"number","type":"uint256"}],"name":"setNumber","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"v","type":"uint256"}],"name":"uintToBytes","outputs":[{"name":"ret","type":"bytes32"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"logNumber","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"deposit","outputs":[],"payable":true,"type":"function"},{"inputs":[],"payable":false,"type":"constructor"}]





This info can easily be retrieved for any contract by using Browser Solidity, inputing your contract's source code, and then on the right hand side clicking "contract details"[/size]


(note, if using the debug window in the Qtum Qt application, don't include ./qtum-cli in the commands)

First, we need to deploy the contract:



Code:
./qtum-cli createcontract 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 300000
Note that the last number is the gas limit for this transaction. The default value is not large enough for this contract, so we increase it to 300,000 gas.

This should result in something like so:

{
  "txid": "72b0e0576d289c1e4e6c777431e4845f77d0884d3b3cff0387a5f4a1a3a874ea",
  "sender": "qZbjaE8N18ZU1m7851G7QGhvxKL74SRBTt",
  "hash160": "aff3e34ab836edb8d214a993d9da105915e4a6e9",
  "address": "5bde092dbecb84ea1a229b4c5b25dfc9cdc674d9"
}



Now, you should store the address in a variable so it's easy to track:

export CONTRACT=5bde092dbecb84ea1a229b4c5b25dfc9cdc674d9
Now wait for your contract to be included in a block. You should be able to confirm it made it into a block by using:

./qtum-cli getaccountinfo $CONTRACT
If you get a message saying "Address does not exist", then either your transaction has not yet been included in a block (you can confirm this with getrawtransaction and your txid), or you did not provide enough gas for the contract to be executed and persisted into the blockchain. If the contract was successfully executed and persisted in the blockchain, you should see something like this:


Code:

{
  "address": "5bde092dbecb84ea1a229b4c5b25dfc9cdc674d9",
  "balance": 0,
  "storage": {
    "290decd9548b62a8d60345a988386fc84ba6bc95484008f6362f93160ef3e563": {
      "0000000000000000000000000000000000000000000000000000000000000000": "0000000000000000000000000000000000000000000000000000000000000001"
    }
  },
  "code": "..."
}



In order to interact with the contract, you must create raw ABI data from the interface JSON file. The easiest tool to assist in this is ethabi, https://github.com/paritytech/ethabi

Make sure the JSON file is saved somewhere, we will call it interface.json.

In order to get the storedNumber variable we use the returnNumber() function. We can construct the ABI values by using ethabi:

ethabi encode function ~/interface.json returnNumber
The result of this is:

3450bd6a

Now, because we are not changing state, we use callcontract:

./qtum-cli callcontract $CONTRACT 3450bd6a
This results in a lot of data that can be useful in different contexts (including gas estimates), but we are only concerned about the output field, which is the value of storedNumber


Code:
{
  "address": "5bde092dbecb84ea1a229b4c5b25dfc9cdc674d9",
  "executionResult": {
    "gasUsed": 21664,
    "excepted": "None",
    "newAddress": "5bde092dbecb84ea1a229b4c5b25dfc9cdc674d9",
    "output": "0000000000000000000000000000000000000000000000000000000000000001",
    "codeDeposit": 0,
    "gasRefunded": 0,
    "depositSize": 0,
    "gasForDeposit": 0
  },
  "transactionReceipt": {
    "stateRoot": "ffbeb0377d43c6ed443a2840259ff5ead5158016ab54d55ef21b7b11aa71947f",
    "gasUsed": 21664,
    "bloom": "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "log": [
    ]
  }
}



To change the storedNumber we can do an on-chain execution using sendtocontract. First, we need the ABI data:

ethabi encode function ~/interface.json setNumber -p 123456 --lenient
3fb5c1cb000000000000000000000000000000000000000000000000000000000001e240
Note we use --lenient so that we do not need to provide a full 256bit value as a parameter. Now, we can execute the contract directly:

./qtum-cli sendtocontract $CONTRACT 3fb5c1cb000000000000000000000000000000000000000000000000000000000001e240
Afterwards, we can call returnNumber() again and check the output field:

"output": "000000000000000000000000000000000000000000000000000000000001e240",
This is 123456 encoded as hex.

You can also use the logNumber() function in order to generate logs. If your node was started with -record-log-opcodes, then the file vmExecLogs.json will contain any log operations that occur on the blockchain. This is what is used for events on the Ethereum blockchain, and eventually it is our intention to bring similar functionality to Qtum.

You can also deposit and withdraw coins from this test contract using the deposit() and withdraw() functions.

The ABI value for deposit is d0e30db0 and the ABI value for withdraw is 3ccfd60b

This will send 10 tokens to the contract:

./qtum-cli sendtocontract $CONTRACT d0e30db0 10

And then, to withdraw them it's also very simple:

./qtum-cli sendtocontract $CONTRACT 3ccfd60b

If you want to control the exact address that the contract sends coins to, you can also explicitly specify the sender. Note that you must be capable of sending coins from that address (you can't use someone elses address). One of my wallet addresses is qZbjaE8N18ZU1m7851G7QGhvxKL74SRBTt, so I'll use that:

./qtum-cli sendtocontract $CONTRACT 3ccfd60b 0 190000 0.0000001 qZbjaE8N18ZU1m7851G7QGhvxKL74SRBTt

Note that if you get the error "Sender address does not have any unspent outputs", then you should send some coins to that address (they must be spent in order to prove that you own that address). This can be accomplished with any amount of coins:

./qtum-cli sendtoaddress qZbjaE8N18ZU1m7851G7QGhvxKL74SRBTt 0.001

There is no need to wait for this transaction to confirm, it can be followed immediately by the sendtocontract command:

./qtum-cli sendtocontract $CONTRACT 3ccfd60b 0 190000 0.0000001 qZbjaE8N18ZU1m7851G7QGhvxKL74SRBTt

When creating this contract transaction, nothing will immediately happen, when the transaction is put into a block though a new transaction will appear in a block which will send any coins owned by the contract to the pubkeyhash address qZbjaE8N18ZU1m7851G7QGhvxKL74SRBTt

FAQ

Q: "I used createcontract, but can't call my contract and it's not in listcontract" A: You probably did not provide enough gas for the contract's constructor to be executed and it's code persisted in the blockchain. The vm.log file should confirm this by saying how much gas was needed

Q: "I sent a large amount of gas but I never got a refund" A: Refunds are generated from the coinstake transaction, so you must wait 500 blocks for the gas refund to mature before it can be spent again

Q: "I used -reindex and now my node is taking forever to resync" A: Currently when doing a reindex, all contracts are reprocessed, so in a chain with many contract executions this can add up to a significant amount of time. This will be made faster in the future, as well as the initial syncing speed of nodes

Q: "I think I found a bug in Qtum" A: Please report any bugs at https://github.com/qtumproject/qtum/issues
New Qtum RPC Commands

Qtum supports all of the RPC commands supported by Bitcoin Core, but also includes the following commands unique to Qtum:

createcontract - This will create and deploy a new smart contract to the Qtum blockchain. This requires gas.
callcontract - This will interact with an already deployed smart contract on the Qtum blockchain, with all computation taking place off-chain and no persistence to the blockchain. This does not require gas
sendtocontract - This will interact with an already deployed smart contract on the Qtum blockchain. All computation takes place on-chain and any state changes will be persisted to the blockchain. This allows tokens to be sent to a smart contract. This requires gas.
getaccountinfo - This will show some low level information about a contract, including the contract's bytecode, stored data, and balance on the blockchain.
listcontracts - This will output a list of currently deployed contract addresses with their respective balance. This RPC call may change or be removed in the future.
reservebalance - This will reserve a set amount of coins so that they do not participate in staking. If you reserve as many or more coins than are in your wallet, then you will not participate at all in staking and block creation for the network.
getstakinginfo - This will show some info about the current node's staking status, including network difficulty and expected time (in seconds) until staking a new block.
New Qtum Command Line Arguments

Qtum supports all of the usual command line arguments that Bitcoin Core supports. In addition it adds the following new command line arguments:

-record-log-opcodes - This will create a new log file in the Qtum data directory (usually ~/.qtum) named vmExecLogs.json, where any EVM LOG opcode is logged along with topics and data that the contract requested be logged.
Untested features

Some features included in Bitcoin Core have not been tested in it's porting to Qtum. This includes:

Pruning

EVM Smart Contract Changes and Limitations

Because of Qtum's underlying technical differences, there are a few operations that can have different results or limitations when executed in Qtum than when compared to Ethereum.

These include the following, though there may be others introduced in the future:

The gas schedule for Qtum is different from Ethereum. Certain operations are more or less expensive. As such, gas cost estimators designed for Ethereum will not give accurate results for Qtum. We will develop our own gas estimating tools as well as fully documenting these differences at a later date.

block.coinbase or the COINBASE opcode currently is not supported and will only return 0. When MPoS is released in the 2nd testnet this should be functioning as expected
block.number will return the previous block height before this block containing the contract's execution
block.difficulty will return the previous block's difficulty
`block.timestamp will return the previous block's timestamp
block.blockhash(n) will return 0 when n is the current block height (block.number+1), similar to Ethereum
sender will return 0 when the coins spent (vin[0].prevout) are from a non-standard transaction. It will return the pubkeyhash 160bit address when spent from a pubkey or pubkeyhash transaction
Coins can be sent to either contracts or pubkeyhash addresses. When coins are sent to a non-existent contract address, the coins will automatically be sent to a pubkeyhash address instead.
Only 1000 vouts can be generated from a single contract execution. Sending coins to the same contract multiple times results in a single vout being created, so the limitation is effectively that coins can only be sent to up to 1000 unique contract or pubkeyhash addresses, including balance changes between contracts. If this limit is exceeded, an Out Of Gas exception is generated and all state changes are reverted.
Contract executions can not happen within coinbase or coinstake transactions
Additional documents for the overall design and expected results of various operations is available at the ITD repository here: https://github.com/qtumproject/qtum-itds







If you would like to receive Test Network tokens, please PM this account with your address and we will get them sent ASAP.  These test tokens will have no value, so you are free to share them with others for testing. We will have a faucet set up shortly, along with a Win64 QT shortly

Staff members in our Slack channel will have Qtum Test Tokens to distribute. Remember, these are free and have no value.



Right now the team is preparing for our launch event in Shanghai, so it may be a touch busy on our side for the next day.







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●▬●▬●▬● First UTXO Based PoS Smart Contract and DAPP Platform ●▬●▬●▬●
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Chasoid
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June 28, 2017, 04:58:33 AM
 #4225

interesting project. will learn more about. Congrats with testnet launch!
AliMan
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June 28, 2017, 06:58:28 AM
 #4226

some one message me about this it a newbie account are you doing a promoting campaign sir?
bitcircle
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June 28, 2017, 08:58:36 AM
 #4227

This is good news Testnet is released on exact time according to the plan. I would like to be part of this historic event so after positive feedback this will move to next destination to release of mainnet. Qtum will become more valuable once this process will get completed.
ciappa
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June 28, 2017, 09:05:37 AM
 #4228

I have bought some QTUM on Yunbi (exchange not recommened for european/american)..
This are pre launch tokens only, how do it work on launch? How can i change pre launch tokens to real QTUM?

thanks a lot

thank you for news about testnet!
but there is really nobody who can answer my question?Huh?

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SteamGamesBTC.com
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June 28, 2017, 09:25:48 AM
 #4229

https://qtum.org/ --> 500 Internal Server Error nginx/1.10.1

 Grin

SteamGamesBTC.com
> Automatic 24/7 bot: purchase any Steam game 20% cheaper with Bitcoin! <
Qtum
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June 28, 2017, 10:04:36 AM
 #4230

someone is ddos the website, we are fixing it.

▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀█ Qtum █▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
●▬●▬●▬● First UTXO Based PoS Smart Contract and DAPP Platform ●▬●▬●▬●
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Slow death
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June 28, 2017, 10:21:57 AM
 #4231

I have bought some QTUM on Yunbi (exchange not recommened for european/american)..
This are pre launch tokens only, how do it work on launch? How can i change pre launch tokens to real QTUM?

thanks a lot

thank you for news about testnet!
but there is really nobody who can answer my question?Huh?


I have the same doubt.


can anyone answer these questions?


This are pre launch tokens only, how do it work on launch?

How can i change pre launch tokens to real QTUM?

SupZ
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June 28, 2017, 11:06:20 AM
 #4232

Stop spaming....  Angry

ada84
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June 28, 2017, 12:32:06 PM
 #4233

They're not spamming, you idiots.

It's an unofficial account.


Honestly, the idiots on this board...
FUTURECRYPTO
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June 28, 2017, 12:57:10 PM
 #4234

I have bought some QTUM on Yunbi (exchange not recommened for european/american)..
This are pre launch tokens only, how do it work on launch? How can i change pre launch tokens to real QTUM?

thanks a lot

thank you for news about testnet!
but there is really nobody who can answer my question?Huh?


I have the same doubt.


can anyone answer these questions?


This are pre launch tokens only, how do it work on launch?

How can i change pre launch tokens to real QTUM?


Guys. Chill. I am QTUM ICO investor. All ICO investors are on same page as yours. Mainnet is supposed to be launched in Sept. QTUM.Org should release instructions to create a Qtum wallet. Because you guys bought through Yunbi, I think yunbi will exchange the tokens for you. In that case, you literally don't have to do anything. This is a standard practice for most of the icos. No need to panic about anything. And congrats on buying Qtum early. After mainnet is released, without doubt Qtum will be listed on all western major exchanges Polo, Bittrex, Kraken, Bitfinex etc.
FUTURECRYPTO
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June 28, 2017, 12:59:43 PM
 #4235

The Qtum team is really active on slack. If you are looking for faster response, slack is the best place.
Gleb Gamow
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June 28, 2017, 03:18:49 PM
 #4236

The Qtum team is really active on slack. If you are looking for faster response, slack is the best place.

Don't make me disclose your vitals, but exactly how did you, FUTURECRYPTO, legally invest in Qtum given that you're a resident of the US? The last time I check, Florida is still part of the US.
Qtum
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June 28, 2017, 04:21:30 PM
Last edit: June 28, 2017, 04:46:22 PM by Qtum
 #4237

I have bought some QTUM on Yunbi (exchange not recommened for european/american)..
This are pre launch tokens only, how do it work on launch? How can i change pre launch tokens to real QTUM?

thanks a lot

thank you for news about testnet!
but there is really nobody who can answer my question?Huh?


I have the same doubt.


can anyone answer these questions?


This are pre launch tokens only, how do it work on launch?

How can i change pre launch tokens to real QTUM?



Hi, sorry for the delayed response. These tokens trading on the exchange are IOU's from the Crowdsale that happened March 16th-21st. Once the Main Network launches in September, they will be converted into real Qtum tokens. What you are seeing on the exchanges cannot be withdrawn.

If you would like to take a look at our source code, the Test Network was launched a few hours ago. This will be the foundation of the Main Network in September:

https://github.com/qtumproject/qtum/releases


▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀█ Qtum █▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
●▬●▬●▬● First UTXO Based PoS Smart Contract and DAPP Platform ●▬●▬●▬●
▃▃▃▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▃▃▃
ciappa
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June 28, 2017, 04:42:13 PM
 #4238

I have bought some QTUM on Yunbi (exchange not recommened for european/american)..
This are pre launch tokens only, how do it work on launch? How can i change pre launch tokens to real QTUM?

thanks a lot

thank you for news about testnet!
but there is really nobody who can answer my question?Huh?


I have the same doubt.


can anyone answer these questions?


This are pre launch tokens only, how do it work on launch?

How can i change pre launch tokens to real QTUM?



Hi, sorry for the delayed response. These tokens trading on the exchange are IOU's from the Crowdsale that happened March 16th-21st. Once the Main Network launches in September, they will be converted into real Qtum tokens. What you are seeing on the exchanges cannot be withdrawn.

If you would like to take a look at our source code, the Test Network was launched a few hours ago. This will be the foundation of the Main Network in September:

https://github.com/qtumproject/qtum/releases



Thanks for your reply! This tokens which we have on yunbi exchage, are converted direct by exchange? We have nothing to do?

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█████  ▄▄███
████    ████
█████  █████
█████▄▄█████
Whitepaper
Announcement
Bounty
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Qtum
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June 28, 2017, 04:50:10 PM
 #4239

I have bought some QTUM on Yunbi (exchange not recommened for european/american)..
This are pre launch tokens only, how do it work on launch? How can i change pre launch tokens to real QTUM?

thanks a lot

thank you for news about testnet!
but there is really nobody who can answer my question?Huh?


I have the same doubt.


can anyone answer these questions?


This are pre launch tokens only, how do it work on launch?

How can i change pre launch tokens to real QTUM?



Hi, sorry for the delayed response. These tokens trading on the exchange are IOU's from the Crowdsale that happened March 16th-21st. Once the Main Network launches in September, they will be converted into real Qtum tokens. What you are seeing on the exchanges cannot be withdrawn.

If you would like to take a look at our source code, the Test Network was launched a few hours ago. This will be the foundation of the Main Network in September:

https://github.com/qtumproject/qtum/releases



Thanks for your reply! This tokens which we have on yunbi exchage, are converted direct by exchange? We have nothing to do?

There's nothing else you need to do. When we launch the Main Network in September, we will send the exchanges the amount of tokens they sold during the Crowdsale, and they will populate every IOU token with real Qtum. This will allow anyone with a Qtum balance to withdraw their tokens.


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●▬●▬●▬● First UTXO Based PoS Smart Contract and DAPP Platform ●▬●▬●▬●
▃▃▃▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▃▃▃
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June 28, 2017, 06:03:07 PM
 #4240

Anybody using this testnet there I would like to hear their feedback about how that is going. I hope soon people will share some screenshots into this thread. This is wonderful achievement this has been released on time and hopefully mainnet will take place like that.
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