fix issues flagged by golangci-lint

The issues flagged by golangci-lint:
https://gist.github.com/dmitris/b2b6836f2e90efa2131a74d8c5253ab7

Related to issue prebid#3519.

account/account.go

@@ -19,7 +19,7 @@ import (
 func GetAccount(ctx context.Context, cfg *config.Configuration, fetcher stored_requests.AccountFetcher, accountID string, me metrics.MetricsEngine) (account *config.Account, errs []error) {
 	if cfg.AccountRequired && accountID == metrics.PublisherUnknown {
 		return nil, []error{&errortypes.AcctRequired{
-			Message: fmt.Sprintf("Prebid-server has been configured to discard requests without a valid Account ID. Please reach out to the prebid server host."),
+			Message: "Prebid-server has been configured to discard requests without a valid Account ID. Please reach out to the prebid server host.",
 		}}
 	}
 
@@ -32,7 +32,7 @@ func GetAccount(ctx context.Context, cfg *config.Configuration, fetcher stored_r
 		}
 		if cfg.AccountRequired && cfg.AccountDefaults.Disabled {
 			errs = append(errs, &errortypes.AcctRequired{
-				Message: fmt.Sprintf("Prebid-server could not verify the Account ID. Please reach out to the prebid server host."),
+				Message: "Prebid-server could not verify the Account ID. Please reach out to the prebid server host.",
 			})
 			return nil, errs
 		}

adapters/adkernelAdn/adkernelAdn.go

@@ -124,7 +124,7 @@ func compatBannerImpression(imp *openrtb2.Imp) error {
 	//As banner.w/h are required fields for adkernelAdn platform - take the first format entry
 	if banner.W == nil && banner.H == nil {
 		if len(banner.Format) == 0 {
-			return newBadInputError(fmt.Sprintf("Expected at least one banner.format entry or explicit w/h"))
+			return newBadInputError("Expected at least one banner.format entry or explicit w/h")
 		}
 		format := banner.Format[0]
 		banner.Format = banner.Format[1:]

adapters/adnuntius/adnuntius.go

@@ -218,7 +218,7 @@ func (a *adapter) generateRequests(ortbRequest openrtb2.BidRequest) ([]*adapters
 			}}
 		}
 
-		if adnuntiusExt.NoCookies == true {
+		if adnuntiusExt.NoCookies {
 			noCookies = true
 		}
 
@@ -463,7 +463,7 @@ func generateBidResponse(adnResponse *AdnResponse, request *openrtb2.BidRequest)
 			adBid, err := generateAdResponse(ad, imp, adunit.Html, request)
 			if err != nil {
 				return nil, []error{&errortypes.BadInput{
-					Message: fmt.Sprintf("Error at ad generation"),
+					Message: "Error at ad generation",
 				}}
 			}
 
@@ -476,7 +476,7 @@ func generateBidResponse(adnResponse *AdnResponse, request *openrtb2.BidRequest)
 				dealBid, err := generateAdResponse(deal, imp, deal.Html, request)
 				if err != nil {
 					return nil, []error{&errortypes.BadInput{
-						Message: fmt.Sprintf("Error at ad generation"),
+						Message: "Error at ad generation",
 					}}
 				}
 

adapters/adtelligent/adtelligent.go

@@ -172,7 +172,8 @@ func validateImpression(imp *openrtb2.Imp) (int, error) {
 	// common extension for all impressions
 	var impExtBuffer []byte
 
-	impExtBuffer, err = json.Marshal(&adtelligentImpExt{
+	// TODO: confirm the missing error handling is intended
+	impExtBuffer, _ /* err */ = json.Marshal(&adtelligentImpExt{
 		Adtelligent: impExt,
 	})
 

adapters/avocet/avocet.go

@@ -86,6 +86,7 @@ func (a *AvocetAdapter) MakeBids(internalRequest *openrtb2.BidRequest, externalR
 			if len(br.SeatBid[i].Bid[j].Ext) > 0 {
 				err := json.Unmarshal(br.SeatBid[i].Bid[j].Ext, &ext)
 				if err != nil {
+					// TODO: find out why we are not using errs
 					errs = append(errs, err)
 					continue
 				}

adapters/beintoo/beintoo.go

@@ -27,7 +27,7 @@ func (a *BeintooAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *ada
 		}}
 	}
 
-	if errors := preprocess(request); errors != nil && len(errors) > 0 {
+	if errors := preprocess(request); len(errors) > 0 {
 		return nil, append(errors, &errortypes.BadInput{
 			Message: fmt.Sprintf("Error in preprocess of Imp, err: %s", errors),
 		})
@@ -133,8 +133,6 @@ func addImpProps(imp *openrtb2.Imp, secure *int8, BeintooExt *openrtb_ext.ExtImp
 			imp.BidFloor = bidFloor
 		}
 	}
-
-	return
 }
 
 // Adding header fields to request header

adapters/between/between.go

@@ -28,7 +28,7 @@ func (a *BetweenAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *ada
 		}}
 	}
 	ext, errors := preprocess(request)
-	if errors != nil && len(errors) > 0 {
+	if len(errors) > 0 {
 		return nil, errors
 	}
 	endpoint, err := a.buildEndpointURL(ext)

adapters/cadent_aperture_mx/cadentaperturemx.go

@@ -42,7 +42,7 @@ func (a *adapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapters.E
 		}}
 	}
 
-	if errs := preprocess(request); errs != nil && len(errs) > 0 {
+	if errs := preprocess(request); len(errs) > 0 {
 		return nil, append(errs, &errortypes.BadInput{
 			Message: fmt.Sprintf("Error in preprocess of Imp, err: %s", errs),
 		})
@@ -192,8 +192,6 @@ func addImpProps(imp *openrtb2.Imp, secure *int8, cadentExt *openrtb_ext.ExtImpC
 			imp.BidFloorCur = "USD"
 		}
 	}
-
-	return
 }
 
 // Adding header fields to request header

adapters/connectad/connectad.go

@@ -146,8 +146,6 @@ func addImpInfo(imp *openrtb2.Imp, secure *int8, cadExt *openrtb_ext.ExtImpConne
 		imp.BidFloor = cadExt.Bidfloor
 		imp.BidFloorCur = "USD"
 	}
-
-	return
 }
 
 func addHeaderIfNonEmpty(headers http.Header, headerName string, headerValue string) {

adapters/consumable/consumable.go

@@ -104,13 +104,10 @@ func (a *adapter) MakeBids(request *openrtb2.BidRequest, requestData *adapters.R
 			switch bidType {
 			case openrtb_ext.BidTypeAudio:
 				seatBid.Bid[i].MType = openrtb2.MarkupAudio
-				break
 			case openrtb_ext.BidTypeVideo:
 				seatBid.Bid[i].MType = openrtb2.MarkupVideo
-				break
 			case openrtb_ext.BidTypeBanner:
 				seatBid.Bid[i].MType = openrtb2.MarkupBanner
-				break
 			}
 			bidResponse.Bids = append(bidResponse.Bids, &adapters.TypedBid{
 				Bid:      &seatBid.Bid[i],

adapters/dmx/dmx.go

@@ -103,7 +103,7 @@ func (adapter *DmxAdapter) MakeRequests(request *openrtb2.BidRequest, req *adapt
 		if dmxReq.App.ID != "" {
 			anyHasId = true
 		}
-		if anyHasId == false {
+		if !anyHasId {
 			if idfa, valid := getIdfa(request); valid {
 				dmxReq.App.ID = idfa
 				anyHasId = true
@@ -190,7 +190,7 @@ func (adapter *DmxAdapter) MakeRequests(request *openrtb2.BidRequest, req *adapt
 
 	dmxReq.Imp = imps
 
-	if anyHasId == false {
+	if !anyHasId {
 		return nil, []error{errors.New("This request contained no identifier")}
 	}
 
@@ -264,8 +264,7 @@ func (adapter *DmxAdapter) MakeBids(request *openrtb2.BidRequest, externalReques
 }
 
 func fetchParams(params dmxExt, inst openrtb2.Imp, ins openrtb2.Imp, imps []openrtb2.Imp, banner *openrtb2.Banner, video *openrtb2.Video, intVal int8) []openrtb2.Imp {
-	var tempimp openrtb2.Imp
-	tempimp = inst
+	var tempimp openrtb2.Imp = inst
 	if params.Bidder.Bidfloor != 0 {
 		tempimp.BidFloor = params.Bidder.Bidfloor
 	}

adapters/gamma/gamma.go

@@ -150,7 +150,7 @@ func (a *GammaAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapt
 		errs = append(errs, err)
 		return nil, errs
 	}
-	var invalidImpIndex = make([]int, 0, 0)
+	var invalidImpIndex = make([]int, 0)
 
 	for i := 0; i < len(request.Imp); i++ {
 		if request.Imp[i].Banner != nil {
@@ -182,7 +182,7 @@ func (a *GammaAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapt
 	} else if len(request.Imp) == len(invalidImpIndex) {
 		//only true if every Imp was not a Banner or a Video
 		err := &errortypes.BadInput{
-			Message: fmt.Sprintf("No valid impression in the bid request"),
+			Message: "No valid impression in the bid request",
 		}
 		errs = append(errs, err)
 		return nil, errs
@@ -205,8 +205,7 @@ func (a *GammaAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapt
 }
 
 func convertBid(gBid gammaBid, mediaType openrtb_ext.BidType) *openrtb2.Bid {
-	var bid openrtb2.Bid
-	bid = gBid.Bid
+	var bid openrtb2.Bid = gBid.Bid
 
 	if mediaType == openrtb_ext.BidTypeVideo {
 		//Return inline VAST XML Document (Section 6.4.2)

adapters/lemmadigital/lemmadigital.go

@@ -102,6 +102,8 @@ func (a *adapter) MakeBids(request *openrtb2.BidRequest, requestData *adapters.R
 			}
 			bidResponse.Bids = append(bidResponse.Bids, b)
 		}
+		// golangci-lint staticheck SA4004: the surrounding loop is unconditionally terminated
+		// TODO: confirm the break is intended and add '// nosemgrep: SA4004'
 		break
 	}
 

adapters/minutemedia/minutemedia.go

@@ -102,6 +102,8 @@ func extractOrg(openRTBRequest *openrtb2.BidRequest) (string, error) {
 			return "", fmt.Errorf("failed to unmarshal ImpExtMinuteMedia: %w", err)
 		}
 
+		// golangci-lint staticcheck SA4004: the surrounding loop is unconditionally terminated
+		// TODO: confirm this is intended and add '// nosemgrep: SA4004'
 		return strings.TrimSpace(impExt.Org), nil
 	}
 

adapters/rubicon/rubicon.go

@@ -587,7 +587,7 @@ func createImpsToExtMap(imps []openrtb2.Imp) (map[*openrtb2.Imp]rubiconExtImpBid
 func prepareImpsToExtMap(impsToExtMap map[*openrtb2.Imp]rubiconExtImpBidder) map[*openrtb2.Imp]rubiconExtImpBidder {
 	preparedImpsToExtMap := make(map[*openrtb2.Imp]rubiconExtImpBidder)
 	for imp, bidderExt := range impsToExtMap {
-		if bidderExt.Bidder.BidOnMultiformat == false {
+		if !bidderExt.Bidder.BidOnMultiformat {
 			impCopy := imp
 			preparedImpsToExtMap[impCopy] = bidderExt
 			continue

adapters/smartrtb/smartrtb.go

@@ -31,9 +31,9 @@ type bidRequestExt struct {
 // bidExt.CreativeType values.
 const (
 	creativeTypeBanner string = "BANNER"
-	creativeTypeVideo         = "VIDEO"
-	creativeTypeNative        = "NATIVE"
-	creativeTypeAudio         = "AUDIO"
+	creativeTypeVideo  string = "VIDEO"
+	creativeTypeNative string = "NATIVE"
+	creativeTypeAudio  string = "AUDIO"
 )
 
 // Bid response extension from downstream.

adapters/sovrnXsp/sovrnXsp.go

@@ -20,9 +20,9 @@ type adapter struct {
 // bidExt.CreativeType values.
 const (
 	creativeTypeBanner int = 0
-	creativeTypeVideo      = 1
-	creativeTypeNative     = 2
-	creativeTypeAudio      = 3
+	creativeTypeVideo  int = 1
+	creativeTypeNative int = 2
+	creativeTypeAudio  int = 3
 )
 
 // Bid response extension from XSP.

adapters/tappx/tappx.go

@@ -86,8 +86,7 @@ func (a *TappxAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapt
 		}}
 	}
 
-	var test int
-	test = int(request.Test)
+	test := int(request.Test)
 
 	url, err := a.buildEndpointURL(&tappxExt, test)
 	if url == "" {
@@ -134,6 +133,11 @@ func (a *TappxAdapter) buildEndpointURL(params *openrtb_ext.ExtImpTappx, test in
 
 	tappxHost := "tappx.com"
 	isNewEndpoint, err := regexp.Match(`^(zz|vz)[0-9]{3,}([a-z]{2,3}|test)$`, []byte(params.Endpoint))
+	if err != nil {
+		return "", &errortypes.BadInput{
+			Message: "Unable to match params.Endpoint " + string(params.Endpoint) + "): " + err.Error(),
+		}
+	}
 	if isNewEndpoint {
 		tappxHost = params.Endpoint + ".pub.tappx.com/rtb/"
 	} else {

adapters/tappx/tappx_test.go

@@ -38,13 +38,16 @@ func TestTsValue(t *testing.T) {
 
 	bidderTappx := bidder.(*TappxAdapter)
 
-	var test int
-	test = 0
+	var test int = 0
 	var tappxExt openrtb_ext.ExtImpTappx
 	tappxExt.Endpoint = "DUMMYENDPOINT"
 	tappxExt.TappxKey = "dummy-tappx-key"
 
 	url, err := bidderTappx.buildEndpointURL(&tappxExt, test)
+	if err != nil {
+		t.Errorf("Error in buildEndpointURL: %s", err.Error())
+		return
+	}
 
 	match, err := regexp.MatchString(`http://ssp\.api\.tappx\.com/rtb/v2/DUMMYENDPOINT\?tappxkey=dummy-tappx-key&ts=[0-9]{13}&type_cnn=prebid&v=1\.5`, url)
 	if err != nil {

adapters/yieldlab/yieldlab.go

@@ -498,20 +498,20 @@ func makeSupplyChain(openRtbSchain openrtb2.SupplyChain) string {
 
 // makeNodeValue converts any known value type from a schain node to a string and does URL encoding if necessary.
 func makeNodeValue(nodeParam any) string {
-	switch nodeParam.(type) {
+	switch nodeParam := nodeParam.(type) {
 	case string:
-		return url.QueryEscape(nodeParam.(string))
+		return url.QueryEscape(nodeParam)
 	case *int8:
-		pointer := nodeParam.(*int8)
+		pointer := nodeParam
 		if pointer == nil {
 			return ""
 		}
 		return makeNodeValue(int(*pointer))
 	case int:
-		return strconv.Itoa(nodeParam.(int))
+		return strconv.Itoa(nodeParam)
 	case json.RawMessage:
-		if freeFormData := nodeParam.(json.RawMessage); freeFormData != nil {
-			freeFormJson, err := json.Marshal(freeFormData)
+		if nodeParam != nil {
+			freeFormJson, err := json.Marshal(nodeParam)
 			if err != nil {
 				return ""
 			}

adapters/yieldmo/yieldmo.go

@@ -35,14 +35,12 @@ type ExtBid struct {
 }
 
 func (a *YieldmoAdapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapters.ExtraRequestInfo) ([]*adapters.RequestData, []error) {
-	var errs []error
 	var adapterRequests []*adapters.RequestData
 
 	adapterReq, errors := a.makeRequest(request)
 	if adapterReq != nil {
 		adapterRequests = append(adapterRequests, adapterReq)
 	}
-	errs = append(errs, errors...)
 
 	return adapterRequests, errors
 }

adservertargeting/respdataprocessor.go

@@ -82,13 +82,14 @@ func buildBidExt(targetingData map[string]string,
 	}
 	bidExtTargeting, err := jsonutil.Marshal(bidExtTargetingData)
 	if err != nil {
-		warnings = append(warnings, createWarning(err.Error()))
+		// TODO: figure out the intended usage of warnings, here and several lines below
+		// warnings = append(warnings, createWarning(err.Error()))
 		return nil
 	}
 
 	newExt, err := jsonpatch.MergePatch(bid.Ext, bidExtTargeting)
 	if err != nil {
-		warnings = append(warnings, createWarning(err.Error()))
+		// warnings = append(warnings, createWarning(err.Error()))
 		return nil
 	}
 	return newExt

bidadjustment/apply.go

@@ -21,7 +21,7 @@ const minBid = 0.1
 
 // Apply gets the highest priority adjustment slice given a map of rules, and applies those adjustments to a bid's price
 func Apply(rules map[string][]openrtb_ext.Adjustment, bidInfo *adapters.TypedBid, bidderName openrtb_ext.BidderName, currency string, reqInfo *adapters.ExtraRequestInfo, bidType string) (float64, string) {
-	adjustments := []openrtb_ext.Adjustment{}
+	var adjustments []openrtb_ext.Adjustment
 	if len(rules) > 0 {
 		adjustments = get(rules, bidType, string(bidderName), bidInfo.Bid.DealID)
 	} else {