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Now that we have an appendix section describing url-safe unpadded base64, let's link to it rather than describing it in multiple places.
10 lines
344 B
Markdown
10 lines
344 B
Markdown
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---
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{{% added-in v=4 %}} The event ID is the [reference
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hash](/server-server-api#calculating-the-reference-hash-for-an-event) of
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the event encoded using [URL-safe unpadded
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Base64](/appendices/#url-safe-unpadded-base64).
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Event IDs are still prefixed with `$` and might result in looking like
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`$Rqnc-F-dvnEYJTyHq_iKxU2bZ1CI92-kuZq3a5lr5Zg`.
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