A map from an algorithm name to a hash of the ciphertext, encoded as unpadded base64.
Clients should support the SHA-256 hash, which uses the key sha256.
The 128-bit unique counter block used by AES-CTR, encoded as unpadded base64.
A JSON Web Key object.
The URL to the file.
Version of the encrypted attachment's protocol. Must be v2.
Information on encrypted media attachments.
Used within
m.room.messageevents that reference files, such asm.fileandm.image.See
https://spec.matrix.org/v1.11/client-server-api/#extensions-to-mroommessage-msgtypes