EVALSHA is like EVAL but instead of sending the script over the wire every time, you reference the script by its SHA1 hash. This is useful for caching scripts on the server side.
Arguments
str
required
The sha1 hash of the script.
List[str]
required
All of the keys accessed in the script
List[str]
required
All of the arguments you passed to the script
Response
The result of the script.