generic error

gistfile1.txt

{
  "errorMessage": "runtime error: invalid memory address or nil pointer dereference",
  "errorType": "errorString",
  "stackTrace": [
    {
      "path": "github.com/aws/[email protected]/lambda/errors.go",
      "line": 39,
      "label": "lambdaPanicResponse"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/invoke_loop.go",
      "line": 102,
      "label": "callBytesHandlerFunc.func1"
    },
    {
      "path": "runtime/panic.go",
      "line": 838,
      "label": "gopanic"
    },
    {
      "path": "runtime/panic.go",
      "line": 220,
      "label": "panicmem"
    },
    {
      "path": "runtime/signal_unix.go",
      "line": 818,
      "label": "sigpanic"
    },
    {
      "path": "github.com/aiocean/[email protected]/pixiv/v1/artwork_api.pb.go",
      "line": 32,
      "label": "(*GetArtworkResponse).Reset"
    },
    {
      "path": "google.golang.org/[email protected]/proto/reset.go",
      "line": 18,
      "label": "Reset"
    },
    {
      "path": "google.golang.org/[email protected]/encoding/protojson/decode.go",
      "line": 65,
      "label": "UnmarshalOptions.unmarshal"
    },
    {
      "path": "google.golang.org/[email protected]/encoding/protojson/decode.go",
      "line": 58,
      "label": "UnmarshalOptions.Unmarshal"
    },
    {
      "path": "google.golang.org/[email protected]/encoding/protojson/decode.go",
      "line": 29,
      "label": "Unmarshal"
    },
    {
      "path": "import-wallpaper/lambda.go",
      "line": 67,
      "label": "invoke[...]"
    },
    {
      "path": "import-wallpaper/lambda.go",
      "line": 82,
      "label": "getArtwork"
    },
    {
      "path": "import-wallpaper/main.go",
      "line": 15,
      "label": "Handler"
    },
    {
      "path": "reflect/value.go",
      "line": 556,
      "label": "Value.call"
    },
    {
      "path": "reflect/value.go",
      "line": 339,
      "label": "Value.Call"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/handler.go",
      "line": 233,
      "label": "reflectHandler.func1"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/handler.go",
      "line": 174,
      "label": "bytesHandlerFunc.Invoke"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/invoke_loop.go",
      "line": 105,
      "label": "callBytesHandlerFunc"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/invoke_loop.go",
      "line": 73,
      "label": "handleInvoke"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/invoke_loop.go",
      "line": 37,
      "label": "startRuntimeAPILoop"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/entry.go",
      "line": 100,
      "label": "start"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/entry.go",
      "line": 63,
      "label": "StartWithOptions"
    },
    {
      "path": "github.com/aws/[email protected]/lambda/entry.go",
      "line": 39,
      "label": "Start"
    },
    {
      "path": "import-wallpaper/main.go",
      "line": 35,
      "label": "main"
    },
    {
      "path": "runtime/proc.go",
      "line": 250,
      "label": "main"
    },
    {
      "path": "runtime/asm_arm64.s",
      "line": 1259,
      "label": "goexit"
    }
  ]
}

lambda.go

// invoke FuncName with data via lambdaClient
func invoke[T proto.Message](ctx context.Context, funcName string, data proto.Message) (T, error) {
	var response T
	payload, err := protojson.Marshal(data)
	if err != nil {
		return response, errors.Wrap(err, "failed to marshal data")
	}

	invokeInput := &lambda.InvokeInput{
		FunctionName: &funcName,
		Payload:      payload,
	}

	invokeOutput, err := getLambdaClient().InvokeWithContext(ctx, invokeInput)
	if err != nil {
		return response, errors.Wrap(err, "failed to invoke function")
	}

	if statusCode := aws.Int64Value(invokeOutput.StatusCode); statusCode != 200 && statusCode != 202 {
		return response, errors.New("invoke status code is " + strconv.FormatInt(statusCode, 10) + ": " + *invokeOutput.FunctionError)
	}

	if invokeOutput.FunctionError != nil {
		var invokeErr _InvokeError
		if err := json.Unmarshal(invokeOutput.Payload, &invokeErr); err != nil {
			return response, errors.Wrap(err, "failed to unmarshal invoke error")
		}
		return response, errors.New(invokeErr.ErrorMessage)
	}

	if err := protojson.Unmarshal(invokeOutput.Payload, response); err != nil {
		return response, errors.Wrap(err, "failed to unmarshal response")
	}

	return response, nil
}

func getArtwork(ctx context.Context, artworkId string) (*pixivv1.Artwork, error) {
	getArtworkFn, ok := os.LookupEnv(getArtworkEnv)
	if !ok {
		return nil, errors.New(getArtworkEnv + " is not set")
	}

	request := &pixivv1.GetArtworkRequest{ArtworkId: artworkId}

	responsePayload, err := invoke[*pixivv1.GetArtworkResponse](ctx, getArtworkFn, request)
	if err != nil {
		return nil, errors.Wrap(err, "failed to invoke function pixiv-dev-get-artwork")
	}

	return responsePayload.Artwork, nil
}