A schema of supported methods.
Each method's schema is represented with Method, Params, ReturnType.
Fordefi methods are available in FordefiRpcSchema, other EIP-1474 methods are available in NonFordefiRpcSchema.
The method name as defined in spec's Method.
Optional params
Arguments for the
request()method. Fordefi methods and other EIP-1474 methods are typed, other methods are treated as having unknown parameters and return type.