Set additionalProperties to false

[lightclient]

This should be added to all objects automatically since we should explicitly define every value in the schema.

[LakeOhmra]

Hello, I would like to work on this problem if I can, I'm new to ethereum though. Is there documentation I could read up on to understand this problem better? Thank you.

[lightclient]

@LakeOhmra you will need to review the JSON schema specification to understand this issue: https://json-schema.org/understanding-json-schema/reference/object.html#id5