🔥🌟🔥【ANN】【ICO】【PRE-SALE】 🚀 QURREX 🚀| THE FIRST HYBRID CRYPTO EXCHANGE🔥🌟🔥

[artem.klimovich]

When is public sale? How can I buy the tokens ?

Open public sale will begin in late May. Now you can buy tokens through a deposit on a white list. For this you need to register and follow the conditions https://tokensale.qurrex.com/login/index.html

[artem.klimovich]

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[artem.klimovich]

QRX Token Value

Part 1: the First Professional Cryptocurrency Exchange and its CEX-segment

Qurrex is the first hybrid cryptocurrency exchange that combines the functionality of both the centralized exchange node and the decentralized nodes.

Our mission is to provide access to cryptocurrency markets for over 200 million regular users and 20 thousand professionals. It is expected that during its operation the exchange will reach the turnover of 10 billion USD a day.

Qurrex is called professional due to the fact that it is relieved of “teething troubles” of the present days crypto trading. It provides all the necessary social, automation, and robotic trading tools for the retail market.

How Qurrex works, video on Youtube

One of the essential parts of Qurrex crypto exchange is the QRX token, which allows all the infrastructure elements to function and players to interact. Developers made sure that the token will be in high demand from a wide range of buyers, during the operation a high market price will be reached as well.

It is necessary to say that Qurrex hybrid cryptocurrency exchange combines three trading systems:

• Professional centralized cryptocurrency exchange;
• Professional decentralized cryptocurrency exchange for liquidity providers, which includes thousands of mini-exchanges;
  
• Third generation trading terminal.

Key features of Qurrex Hybrid Cryrtocurrency exchange

In this post we will try to highlight the value of the token for the professional centralized cryptocurrency exchange...

Read the full article you can on the site https://medium.com/qurrex/qrx-token-value-fc12aaa56080

[Boing7898]

Conditions for public sale are the same to deposit? I mean cryptocurrency prices grow… better to wait. Anyway, i hope Qurrex will be great.

[artem.klimovich]

Conditions for public sale are the same to deposit? I mean cryptocurrency prices grow… better to wait. Anyway, i hope Qurrex will be great.

Conditions are the same. But deposit system allows you to take priority place in the queue in relation to the participants who will come on public sales

Quite right. Also, the deposit will guarantee 100% of the purchase of tokens. Only the remainder of the tokens after the sale to the funds will participate in the open sale

[artem.klimovich]

Conditions for public sale are the same to deposit? I mean cryptocurrency prices grow… better to wait. Anyway, i hope Qurrex will be great.

No, the conditions are different. Now 1ETH = 500 QRX + AirDrop

[Alexey131]

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[artem.klimovich]

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[islakevin]

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[danneks]

In a current prototype of Qurrex(CEX), exchange features are implemented in a modular manner and can be tested separately/independently? And for this test, what kind of TDD (test driven development) methodology Qurrex development team exploit?

[ldnBTCx]

How do you define the (packet) data format for the transaction in the exchange system?

[artem.klimovich]

In a current prototype of Qurrex(CEX), exchange features are implemented in a modular manner and can be tested separately/independently? And for this test, what kind of TDD (test driven development) methodology Qurrex development team exploit?

All the Qurrex software layers (exchange, middleware, presentation layer) are unit tested.
Middleware unit tests are conducted in Continuous Integration software (TeamCity). A part of unit tests are written in Behaviour Driven Development pattern (given - then).
We also write tests for Data Access layer. For these tests we automatically creating (and destroying after) test databases with some initial data. We conduct load tests in Apache JMeter.

[artem.klimovich]

How do you define the (packet) data format for the transaction in the exchange system?

More services of the CEX define their data formats (messages formats) in our in-house YAML-based format. Every message has frame, containing message class unique identifier, sequence number and actual length of message. Each messages set (set of messages belonging to the same logical data stream) we call  a scheme. Scheme can be used both for dynamically unpacking messages from incoming stream and (preferably for low-latency services) generating C++ code for creating and reading messages using statical (for better performance) or dynamical approach: latter approach allows not to recompile client even is case of some changes in the messages scheme, while former ensures virtually no overhead for decoding messages. Variable-length messages, nested messages and lists are supported. We find our approach having some features similar to Google Protobuf. Bindings for Python language are also generated from messages schemes. Data stream (“link”) can expose its scheme to clients, making data stream self-described.
Middleware / presentation layer are widely using DTO structures. These classes are being serialized in JSON format. When DTO is routed through communication channels, Redis MQ or UDP, it may be packed by GZip algorithm - depending on the channel’s settings.

[ldnBTCx]

How do you define the (packet) data format for the transaction in the exchange system?

More services of the CEX define their data formats (messages formats) in our in-house YAML-based format. Every message has frame, containing message class unique identifier, sequence number and actual length of message. Each messages set (set of messages belonging to the same logical data stream) we call  a scheme. Scheme can be used both for dynamically unpacking messages from incoming stream and (preferably for low-latency services) generating C++ code for creating and reading messages using statical (for better performance) or dynamical approach: latter approach allows not to recompile client even is case of some changes in the messages scheme, while former ensures virtually no overhead for decoding messages. Variable-length messages, nested messages and lists are supported. We find our approach having some features similar to Google Protobuf. Bindings for Python language are also generated from messages schemes. Data stream (“link”) can expose its scheme to clients, making data stream self-described.
Middleware / presentation layer are widely using DTO structures. These classes are being serialized in JSON format. When DTO is routed through communication channels, Redis MQ or UDP, it may be packed by GZip algorithm - depending on the channel’s settings.

Thanks,your sistem inspires trust

[master7]

How the Qurrex gateway can support vertical/horizontal scalability?

[vkopp]

How can Qurrex server handle requests in batch manner?

[qurrex]

How the Qurrex gateway can support vertical/horizontal scalability?

Each Qurrex gateway to the core of CEX is a multi-threaded service, and each thread has its message loop, which can process many  client connections. There are two types of gateways – optimized for good scalability for supporting vast number of connections and optimized for low latency for less number of HFT clients. Gateway services can be connected to Matching or Risk Engines using many-to-many relationship using Qurrex Routing Logic components and can reside both at the same or at different compute nodes, providing horizontal scalability.

Vertical scaling. Each middleware microservice can be hosted on a separate server. Each database (presently middleware owns 4 database schemes: configuration, dealing, market data and statistics) can also be hosted on a separate server.

Horizontal scaling. The dealing microservice deals with the highest payload among other microservices. The service processes trading orders and performs basic risk management. The payload grows with the growth in end customers numbers. The dealing microservice can be installed several times on several servers while the payload is being balanced evenly (as a function of trading account identificator). Load balancing function is updated on plugging / unplugging one of the dealing microservices with downtime less than 1 minute.

[master7]

How the Qurrex gateway can support vertical/horizontal scalability?

Each Qurrex gateway to the core of CEX is a multi-threaded service, and each thread has its message loop, which can process many  client connections. There are two types of gateways – optimized for good scalability for supporting vast number of connections and optimized for low latency for less number of HFT clients. Gateway services can be connected to Matching or Risk Engines using many-to-many relationship using Qurrex Routing Logic components and can reside both at the same or at different compute nodes, providing horizontal scalability.

Vertical scaling. Each middleware microservice can be hosted on a separate server. Each database (presently middleware owns 4 database schemes: configuration, dealing, market data and statistics) can also be hosted on a separate server.

Horizontal scaling. The dealing microservice deals with the highest payload among other microservices. The service processes trading orders and performs basic risk management. The payload grows with the growth in end customers numbers. The dealing microservice can be installed several times on several servers while the payload is being balanced evenly (as a function of trading account identificator). Load balancing function is updated on plugging / unplugging one of the dealing microservices with downtime less than 1 minute.

Ok, got it! Thank you.

[Armand]

Nice project. I hope you will do your best! I'll advice Qurrex to my friends, they are interested in cryptocurrency