Errors

After processing a request, Horizon returns a success or error response to the client. A success response will return a Status Code of 200, and an error response will return a Status Code in the range of 4XX – 5XX along with additional information about why the request could not complete successfully.

There are two categories of errors: HTTP Status Codes and Result Codes. Result Codes only follow an HTTP Status Code 400 (Transaction Failed).

Error Categories

HTTP Status	Errors that occur at the Horizon Server level.
Result Codes	Errors that occur at the Stellar Core level.