Required Legal Notice: Virtual currencies, real risks. The only guarantee in crypto is risk. Read more

Required Legal Notice: Virtual currencies, real risks. The only guarantee in crypto is risk. Warning: The value of your virtual currencies can rise or fall sharply, and your initial investment may be lost completely; virtual currencies are not covered by the guarantee funds that cover bank deposits; there is no legal mechanism on the virtual currencies market to prevent market manipulation or insider dealing; virtual currencies depend entirely on a specific computer technology and infrastructure, which in certain cases may be very recent and not yet adequately tested; if one loses the identification code or password giving access to the virtual wallet in which the virtual currency is stored, the currency held therein will be irretrievably lost; virtual currencies are currently accepted as a means of payment to a limited extent, and in most countries there is no legal obligation to accept them; for more information about the risks associated with an investment in virtual currencies, we advise you to read the Wikifin page What is a cryptocurrency? | Wikifin.

WebSocket API v2 - Order book checksum calculator (Google Sheet)

Last updated: 2 красавіка 2025 г.

Our WebSocket API v2 order book feed includes a CRC32 checksum with each update message, that can be used to confirm the validity and correctness of a locally maintained order book (an order book that has been created by interpreting the order book feed).

The details of the CRC32 checksum calculation are available in our WebSocket API documentation, allowing the order book checksum to be implemented using any programming language that supports a CRC32 function (or that can be coded to support a CRC32).

In addition to the checksum implementation details, it can be helpful to have a confirmed correct checksum value for any given order book (to compare to the checksum value from your own code), so we provide the following checksum calculator for this purpose.

Usage instructions

1
Open the order book checksum calculator in Chrome (or any other recent web browser)
2
Make a copy of the calculator to your own Google Drive via the File -> Make a copy menu (you will need to sign in to your Google account for this step)
3
Copy/paste a valid order book using the same JSON format as the example (essentially two objects containing arrays of the best 10 bid and ask price levels)
4
Compare the displayed order book checksum to the checksum calculated by your own code (the two values should match exactly)

Example

WebSocket API v2 - Order book checksum calculator (Google Sheet)

Usage instructions

Example

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