File size on event tiles except audio player is displayed in kilobyte (kB, 1000 bytes) instead of kibibyte (KB, 1024 bytes)

[luixxiul]

Steps to reproduce

1. Upload an audio file to an unencrypted room
2. Open File Panel
3. Compare the file sizes on audio player and the download link

Otherwise, run cypress test (file-panel.spec.ts) available at matrix-org/matrix-react-sdk#10400

Outcome

What did you expect?

The both values should match.

What happened instead?

The values do not match. The value of the download link is incorrect (the correct value is 3.56 KB).

Operating system

Debian

Browser information

Cypress

URL for webapp

localhost

Application version

develop branch

Homeserver

Cypress

Will you send logs?

No

[luixxiul]

It turns out it is not limited to an audio file. The size of a normal file also seems to be incorrect.

The size of the uploaded file is 1.12 KB, not 1.15 KB.

It seems to be irrelevant to the file panel. The issue occurs on the main timeline as well.

It is not related to encryption as the room is not encrypted.

[luixxiul]

The audio file size is 3650 byte, and the json file size is 1150 byte. Is the cause of the difference perhaps using a different unit (KB / KiB) ?

[t3chguy]

This looks like a KiB vs KB thing indeed.

[NSV1991]

I like to work on this issue

[luixxiul]

As a follow-up, I'm going to update the E2E test to ensure the fix :-)

This is the PR: matrix-org/matrix-react-sdk#10568