Casts API 
Used to retrieve valid casts or tombstones for deleted casts
API 
| Method Name | Request Type | Response Type | Description | 
|---|---|---|---|
| GetCast | CastId | Message | Returns a specific Cast | 
| GetCastsByFid | FidRequest | MessagesResponse | Returns CastAdds for an Fid in reverse chron order | 
| GetCastsByParent | CastId | MessagesResponse | Returns CastAdd replies to a given Cast in reverse chron order | 
| GetCastsByMention | FidRequest | MessagesResponse | Returns CastAdds that mention an Fid in reverse chron order | 
| GetAllCastMessagesByFid | FidRequest | MessagesResponse | Returns Casts for an Fid in reverse chron order | 
CastsByParentRequest 
| Field | Type | Label | Description | 
|---|---|---|---|
| parent_cast_id | CastId | ||
| parent_url | string | ||
| page_size | uint32 | optional | |
| page_token | bytes | optional | |
| reverse | bool | optional |