Welcome to the world of TokenCaps, an express-node based framework adept at aggregating cryptocurrency data from the web. Whether you’re looking to normalize and cleanse data or provide easy-to-digest endpoints, TokenCaps does it all. In this article, we will walk you step-by-step through the installation process, operational setup, and how to troubleshoot if things go awry.

What is TokenCaps?

TokenCaps implements the ccxt public library, providing a load-balancer and a query server over 80 supported exchanges. Think of it as your personal translator that takes the chaos of cryptocurrency data from different exchanges and turns it into a clear and concise dialogue you can easily understand.

Installation

To get started with TokenCaps, follow these straightforward steps:

• Open your terminal or command prompt and type:

npm install

• After installation, start the server by typing:

npm start

• Create all necessary tables by sending a GET request to:

GET create/create-all-tables

• To start a cron job for querying coin ticker data, send a GET request to:

GET cron/query-coin-list-table

Enhancing Your TokenCaps Experience

If you’re interested in server-side rendering of graph data, you will also need to install chartjs-node, alongside canvas.js and cairo.

To enable 24-hour data plotting, simply call the following endpoint:

GET cron/query-daily-history-table

High Availability (HA) Deployment

To run TokenCaps in a fault-tolerant manner, consider using a High Availability (HA) data cluster, with your API server running behind a load balancer. Always remember that NodeJS is single-threaded; thus, running the CRON process within a separate Node container prevents normal requests from getting jammed up due to blocked aggregation queries.

You might find YugaByte useful as it offers a polyglot database with a unified CQL + Redis implementation.

Hosted Solutions

TokenCaps provides multiple endpoints for user interaction:

User Interface Endpoints

• Exchange View: View the public APIs of 79 exchanges.
• Token View: Presents details on 2000 coins. Data refreshes every 10 seconds.
• Portfolio View: A management screen for aggregated exchanges, with more support on the way.

API Endpoint

The TokenCaps API is hosted and can be accessed at api.tokenplex.io. For production applications, it’s highly recommended to set up your own hosted solution to ensure full control.

How It Works

TokenCaps employs strategies for efficient data management:

• Ticker data resides in a Redis Cache, implementing updates every 3 seconds.
• Requests for history data are managed by a Time-To-Live (TTL) strategy, enhancing speed and efficiency.
• Exchange-Markets tables have a TTL of 6 seconds, while Coin-Detail tables have a TTL of 10 seconds.

An S3 Image server can also be specified for server-side rendering of graph images, allowing for a delightful visual experience.

Troubleshooting

Even the best of systems can encounter hiccups. Here are a few troubleshooting tips:

• Errors During Installation: Ensure that you have all necessary packages and dependencies installed. Semantic Versioning can help manage your package versions.
• Data Refresh Issues: Double-check your cron job settings and that your TTL values are appropriately configured.
• Server Not Starting: Check for port conflicts, especially if you have other applications using the same port.

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Final Thoughts

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.