export interface APIAttachmenthttps://discord.com/developers/docs/resources/message#attachment-object-attachment-structure
optionalcontent_type? : string 
The attachment's media typeSee https://en.wikipedia.org/wiki/Media_type
optionaldescription? : string 
Description for the file
optionalduration_secs? : number 
The duration of the audio file (currently for voice messages)
optionalephemeral? : boolean 
Whether this attachment is ephemeral
filename : string
Name of file attached
optionalflags? : AttachmentFlags 
Attachment flags combined as a bitfield
id : Snowflake
Attachment id
proxy_url : string
A proxied url of file
size : number
Size of file in bytes
optionaltitle? : string 
The title of the file
url : string
Source url of file
optionalwaveform? : string 
Base64 encoded bytearray representing a sampled waveform (currently for voice messages)