General questions
  • General questions
  • Technology
  • Casper Token (CST)
  • Pre-ICO
  • ICO
  • For providers
  • Payment
What is DApp?
DApp (Engl.) Decentralized Application. As an ordinary application, Dapp consists of the user interface (frontend) and the server part (backend), but is different from it as it includes a smart contract. The smart contract is also a part of the backend, only it is created especially for the block-chain. In essence, the smart contract is a contract between the developers and the users that provides for full transparency of application performance. Decentralized applications include games, social networks, postal services and all other things that we are so used to in the world of the Internet. The only difference is that their operation is fully transparent.
What is a Smart Contract?
In concept, this is a contract, a computer algorithm having conditions preset and open for any participant, and when these conditions are fulfilled, the parties will be able to exchange money, assets, or new processes will be launched free from participation of third parties (agents).
What is Casper API?
Casper API is the infrastructural element that allows any DApp to set up a decentralized cloud storage of service data using any block-chain with a smart contract.
How does this work?
The decentralized application requests from smart-contract a free space to place content, smart-contract sends an address of the server where data may be uploaded. The Casper API system, during the upload, copies the file to 3 more servers, in summary, we have 4 copies of the file. Further, this number of replicas is maintained. When one server is no longer available in the network, it will be replaced by a new one, which downloads a copy from the 3 remaining servers. Depending on the content, the application developers may encrypt or not encrypt the data. Casper API stores 4 copies of files encrypted or open for review.
Who are providers?
The providers are individuals or legal entities that offer a certain volume of storage space on their computers/servers using Casper API and receiving remuneration for these services using Casper tokens (CSTs).
How is it different from the competition?
No one on the market has already made or even declared the creation of storage infrastructure for decentralized applications. We are creating a decentralized storage under smart contract management. DApp will be able to interact with the storage by referring to the smart contract. This eliminates the risks of architecture limitations in other systems. We are ready to work with every platform that uses a smart contract. As of today, these platforms include Ethereum, Graphen and Neo. As new block-chains appear, we will be able to start working with them immediately.
When did the PRE-ICO take place?
The PRE-ICO started on December 19, at 2 pm MSK. It was completed in one hour and raised 1239 ETH, which at the time amounted to slightly over $1,000,000.
When will ICO take place?
Date of ICO - August 9, 2018
How can I become a provider in your system?
Our system has several requirements for those who wish to become our providers. First, you will need high-speed Internet access, free disk space and Casper tokens (to provide 25,6 GB you will need 1 CST). Secondly, our system regularly checks on providers, so you must be online 95% of the time.
What is the payback period for the provider?
You can use the convenient calculator on our website to calculate the approximate pay-off period depending on your country of residence, and the prices for electricity, the Internet connection and the equipment.
Where can I find more information about you?
We are available in: Telegram, Medium, Twitter, GitHub, Bitcointalk, Facebook, Steemit, Reddit. Also, on YouTube we maintain a blog about new generation of blockchain, business and bitcoin - Generation B.
Who will be the clients of the Casper API?
Dapp developers and traditional business will be the clients of the Casper API platform.
What is an ICO?
The ICO or Initial Coin Offering is when some project issues coupons, or tokens intended to pay for services the site renders in the future.
Is there a limit to the size of the file stored in the system?
No. No limits to the file size.
Which blockchain is used?
The initial version of Casper API will be based on the Ethereum blockchain. The API can function with any blockchain platform with a smart contract.
What technologies guarantee fast transmission of files from/to the provider?
Casper API technology is based on the well-known P2P (peer-to-peer) principle, which considerably increases the speed of receiving and transmitting the files.
What is P2P?
A peer-to-peer network is a type of decentralized network architecture where the process of data transfer is based on the idea of equality of all its participants.
Where can I find and review your smart contract?
As of today, the contract that we created for PRE-ICO is in open access. To study this contract, please follow this link: https://github.com/Casper-dev/pre_ico
What is DHT?
DHT (Engl. Distributed hash table) is a protocol that allows BitTorrent clients to find each other without a tracker.
What kind of encryption is used?
This encryption technique is called AES256 in GCM. But you can use your cipher additionally.
If there is a virus in the downloaded file, can it "infect" my computer, in case I'm your provider
Such a possibility is the minimum, since we utilize Go coding language.
What is a Casper token (CST)?
The digital token, which is used for system operation and payment for storage service in Casper API.
How many CSTs will be issued?
A total of 440,000,000 CSTs will be issued. After the ICO, there will be no additional issues of CSTs.
How will they be distributed?
Pre-ICO - 13 000 000 CST;
ICO (pre-sale) - 66 658 644 CST;
ICO (crowd-sale) - 37 500 000 CST;
Secondary Token Offering Pool - 88 000 000 CST;
Community development fund - 66 000 000 CST;
System fund - 72 849 627 CST;
Major investors’ bonuses - 13 331 729 CST;
Team - 66 000 000 CST;
Advisors - 7 000 000 CST;
Bounty - 8 800 000 CST;
Referral program - 860 000 CST
What is the Casper Fund?
CST system fund is designed to facilitate sustained development for Casper API
What is token lease?
CST lease is an important financial instrument for the Casper economic model. Free circulation of CSTs on the exchange can lead to a rapid increase in token price, which will impair acquisition of tokens, and therefore limit development of the service. Token lease opportunities will help retain the financial attractiveness for purchasing tokens even at high market prices. The owner of tokens will lease them out and thus expedite the investment pay-off period. The token owner receives a portion of the income from the token that the lessee saved in order to become a provider.
When does PRE-ICO start?
PRE-ICO will start on December 19, at 2 pm MSK.
What sum is expected to be raised?
What is CSPT?
On December 19, 2017, during the preICO event, we issued CSPT tokens using an individual smart-contract, not under the ERC20 standard. The day the ICO is started, these tokens may be converted to CST tokens of the working smart-contract implemented under the ERC20 standard. CST tokens will be frozen for one year after being exchanged. Once this period is over, they may trade on the exchange.
How many CSPTs will be sold at the PRE-ICO stage?
13,000,000 CSPTs
How long was the PRE-ICO period?
We succeeded in raising the declared sum of $1,040,000 in just one hour, from 2 to 3 pm MSK on December 19, 2017.
What was the currency in which the money was collected?
It was ETH, with the exchange rate of $0.08 per token.
When does ICO start?
Date of ICO - August 9, 2018
What is the project Soft Cap?
The Soft Cap of our project is $5,500,000.
What is the project Hard Cap?
The Hard Cap of our project is 15 039 037$.
What will happen if the Soft Cap is not reached?
The smart contract will automatically return the ETH to the wallets of the users who had initially transferred the payment.
What will be the price per token?
The price for the ICO token (pre-sale) 0.12$ / (crowd-sale) $0.16. Major investors will enjoy bonuses.

CST Lockup
September (20%/20%/20%)
November (20%/20%/20%)
January (20%/20%/20%)
March (20%/20%/20%)
May (20%/20%/20%)
When will Casper tokens appear on major cryptocurrency exchanges?
Tokens, issued at the ICO stage will follow the ERC20 standard, and, therefore, may be added on the exchange. We will begin negotiating with representatives of leading exchanges after the ICO and after we receive a legal opinion on the token.
What will be the currency of these funds?
The funds will be collected in ETH and BTC
What do I need to become a provider?
You need at least 25.6 GB of disk space, a static IP address, and ports 9090, 4001, 5001, 8080 opened. Also, you should be online at least 95% of the time.
What is a static IP?
A static IP-address is a permanent IP-address, assigned to you by your internet service provider. To get a permanent IP address, you need to contact your ISP.
How can I check if my ports are open?
Here are two online tools to check that: yougetsignal or portchecker You need to check ports 9090, 4001, 5001 and 8080.
I was told that I have these ports closed. How can I open them?
You can follow this guide Also, you will need to open the ports in your network equipment if you use any. To do it, please contact the support service of your network equipment manufacturer.
What does “staying online 95% of the time” mean?
Providers ping each other for online status regularly. If a provider does respond to such pings for 70 minutes, it gets temporarily disconnected from the network and banned.
What should I do if my application displays banned status?
You need to check whether you have fulfilled all the necessary requirements:
  1. Check your 9090, 4001, 5001, 8080 ports: all of them must be open
  2. The provider’s application must not be unavailable for more than 70 minutes a day
How can I find out when the application was disconnected from the network?
There is Casper-SC – an application in the provider app folder. Open it, press “2” and you’ll be able to look through the list of banned participants. If your node was banned, you can find out when it happened. To do this, you need to find your node on the list (you can use either your IP address or your Telegram username). The right column shows when the node was banned.
Why would my application disconnect from the network?
It is most likely that your ports are closed. If you contact your ISP, you can check what kind of IP-address you have (static or dynamic) and if there were any network failures within an hour before the ban. You can also try and find out if there were any power outages within this period of time.
What should I do if I completed all the steps, but the issue persists?
If you meet all the requirements as a provider, but the application still considers you banned, please contact us via any of the Casper API Telegram chats. If you got rid of all the problems, try to connect to the network again: you’ll need to delete the folder named “Casper”. In most cases, it is located here C:/Users// for Windows and ~/ for Linux.
How can I check if everything is working?
1) Follow the link
2) Find the "Our providers" block
3) In the Telegram field enter your nickname, which you indicated when you launched the client
4) If your IP address is displayed in purple, then you are online if gray - offline


1) Launch the Casper-SC application
2) when the program window opens, press 1 and enter; a list of nodes connected to the smart contract will be displayed
3) if you are connected but do not see yourself in the list of connected nodes, press 2 to display the list of blocked nodes
What do I have to do to upgrade from old version?
If you have already been connected to us, you will need to remove the old version configs:
  • if you are using Windows - delete the .casper folder from C:/Users/<Your user>/ (you can also go there by typing %USERNAME% in the path line)

  • if you are using Ubuntu or Debian - delete the .casper folder from ~/ (if you startup through sudo it's in the folder /root/)
How to buy CST?
To buy CST you will need:
1. Register an ETH wallet or use an existing one
2. Decide on the size of your investment
3. Transfer the desired amount to Casper API wallet (smart contract) address
How to create an ETH wallet?
The easiest way is to create an online wallet without downloading the client to your computer. Fore example, MyEtherWallet is different from other hosted wallets with that you are in control of your private key on your own device. A step-by-step guide and other options are here.
When do I get to see the CST in my wallet?
You will see your CST after completing the KYC procedure.
How can I see my purchase history?
Your purchase history is logged on the Ethereum blockchain, we also log operations history on your dashboard.
Which exchange do you look at for ETH and BTC values?
We use an average between Bitfinex and Binance.
I have a BTC wallet, why should I register an ETH one?
CST token is an Ethereum ERC20 token. To have the smart contract send you back the tokens you purchase you need to enter your ETH address.
Why can't I sell my CST immediately?
The economic model Casper API is built on is aimed to facilitate sustainable growth of the company. We are developing a product for business and we are interested in investments, not flip trading and speculation on our token price. This is why our token sale model will not let you sell them immediately.
How to complete KYC?
The entire identification procedure can take some time. You will have to upload your picture and an ID (passport/ID/driver's license)
When will KYC be available?
The procedure will be initiated when all the token sale stages are over with the last one being the crowd sale (23.07 - 02.08)
What if I don't pass KYC?
In case you don't pass KYC within the aforementioned period, SC will refund your purchase. The period will be announced after the ICO ends.
What if I invest less than $10,000 during the pre-sale?
If the invested amount of ETH is equivalent to less than $10,000 (this is the minimum threshold for investing in Pre-sale) the smart contract will not greenlight your transaction and your funds will remain on your wallet.
Can I purchase CST for $?
No. You can buy cryptocurrencies such as ETH and BTC for $ that you can further use for investing in CST.
How to buy ETH, BTC?
First you will need to create a cryptocurrency wallet.
To purchase Ethereum or Bitcoin you can choose the following routes:
1. Using online exchanger services. This works for beginners who don't want to go deep into the entire process.
2. Using special cryptocurrency exchanges — you will need to put a bit more effort into it, however, you can buy Ether for fiat currencies for the best possible Ethereum exchange rate. For more information about these options read this or this.
How to choose the right wallet for CST?
Currently there are four types of cryptowallets:
1. Hot
2. Warm
3. Cold
4. Paper
Click for more info about each of them.
When do you calculate the amount of CST due for accretion? At the time of purchase or some other day?
CST rate is calculated at the time of purchase and is not subject to change.
Can I send my CST to another wallet, different to the one initially entered?
Yes, you will be able to transfer your CST in whole or part to another wallet after the tokens are unlocked. CST token unlock schedule:

• September (20%)
• November (20%)
• January (20%)
• March (20%)
• May (20%)
What standard is your token compliant with?
It's a standard ERC20 token.
Can I store tokens on an exchange wallet?
You will be able to store your CST after Casper API tokens are listed on an exchange. Later we will tell you about the exchanges and the process of listing our tokens there later.