ErrorResponse

public class ErrorResponse : Decodable, @unchecked Sendable

Represents an error response from the Horizon API.

When a request fails, Horizon returns an error response with details about what went wrong. Error responses include HTTP status codes, error types, descriptions, and additional debugging information in the extras field.

Common error types:

• 400 Bad Request: Invalid parameters or malformed request
• 404 Not Found: Resource doesn’t exist
• 429 Rate Limit Exceeded: Too many requests
• 500 Internal Server Error: Server-side problem

Example usage:

let response = await sdk.transactions.submitTransaction(transaction: tx)
switch response {
case .success(let result):
    print("Success: \(result.hash)")
case .failure(let error):
    if case .badRequest(_, let horizonError) = error,
       let errorResponse = horizonError {
        print("Error: \(errorResponse.title)")
        print("Detail: \(errorResponse.detail)")

        // Check for transaction-specific errors
        if let extras = errorResponse.extras,
           let resultCodes = extras.resultCodes {
            print("Transaction result: \(resultCodes.transaction ?? "")")
            print("Operation results: \(resultCodes.operations ?? [])")
        }
    }
}

See also:

• Stellar developer docs
• HorizonRequestError for error enum types