"broker::str::Financial institution or brokerage firm",
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kind of defeat the point of this blog post.
You might ask: why not use the actual time? Unfortunately, accurately syncing clocks between two computers is an extremely hard problem. Using incrementing integers like this is one simple version of a logical clock Logical clock - Wikipedia en.wikipedia.org/wiki/Logical_clock , which captures the order of events relative to each other rather than to the “wall clock”. ↩
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