ErrorCodes

-32603 Internal error — internal JSON-RPC error.

-32602 Invalid params — invalid method parameter(s).

-32600 Invalid Request — the JSON sent is not a valid Request object.

-32601 Method not found — the method does not exist or is not available.

-32700 Parse error — invalid JSON was received by the server.

Returns true if code is in the server-error range (-32000 to -32099).