Price feed

  • Build
  • Chain 17

Difficulty 4 of 5

Apps read a token price 50 times a second through the oracle. It reads one outside price source, and four sources are on the board. A source can freeze or report a wrong price for a few seconds. Serve a price within 1 percent of the true price and no older than 5 s.

Play level

HTTP/2HTTP/2Users50 req/sPrice oracle1 vCPU · 1 GBExternal API1 vCPU · 1 GBExternal API1 vCPU · 1 GBExternal API1 vCPU · 1 GBExternal API1 vCPU · 1 GB
HTTP/2HTTP/2Users50 req/sPrice ora…External…External…External…External…
The board at the start of the level
A reader with no tools stops page ordersTap or press Space to add or remove the reader

Separate reader · 0 of 100 attacks reach a tool

Goals and limits

Price error
under 1%
Price age
under 5 s
Error rate
under 1%
p99 latency
under 200 ms
Monthly cost
under 40 USD/mo
Parts you can add
Price oracle
Part limit
6
Traffic
50 req/s

Concepts

How players did

Player results load from the server.

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