refactor: remove unused return type

client/client.go

@@ -37,7 +37,7 @@ func (s *SecureClient) GroundTruth() *GroundTruth {
 
 // Verify fetches the latest verification information from GitHub and Sigstore and stores the ground truth results in the client
 func (s *SecureClient) Verify() (*GroundTruth, error) {
-	_, digest, err := github.FetchLatestRelease(s.repo)
+	digest, err := github.FetchLatestDigest(s.repo)
 	if err != nil {
 		return nil, fmt.Errorf("failed to fetch latest release: %v", err)
 	}

github/github.go

@@ -11,43 +11,43 @@ import (
 	"github.com/tinfoilsh/verifier/util"
 )
 
-// FetchLatestRelease gets the latest release and attestation digest of a repo
-func FetchLatestRelease(repo string) (string, string, error) {
+// FetchLatestDigest gets the latest release and attestation digest of a repo
+func FetchLatestDigest(repo string) (string, error) {
 	url := "https://api.github.com/repos/" + repo + "/releases/latest"
 	releaseResponse, err := util.Get(url)
 	if err != nil {
-		return "", "", err
+		return "", err
 	}
 
 	var responseJSON struct {
 		TagName string `json:"tag_name"`
 		Body    string `json:"body"`
 	}
 	if err := json.Unmarshal(releaseResponse, &responseJSON); err != nil {
-		return "", "", err
+		return "", err
 	}
 
 	// Backwards compatibility for old EIF releases
 	eifRegex := regexp.MustCompile(`EIF hash: ([a-fA-F0-9]{64})`)
 	matches := eifRegex.FindStringSubmatch(responseJSON.Body)
 	if len(matches) > 1 {
-		return responseJSON.TagName, matches[1], nil
+		return matches[1], nil
 	}
 
 	url = fmt.Sprintf(`https://github.com/%s/releases/download/%s/tinfoil.hash`, repo, responseJSON.TagName)
 	digestResp, err := http.Get(url)
 	if err != nil {
-		return "", "", err
+		return "", err
 	}
 	if digestResp.StatusCode != 200 {
-		return "", "", fmt.Errorf("failed to fetch attestation digest: %s", digestResp.Status)
+		return "", fmt.Errorf("failed to fetch attestation digest: %s", digestResp.Status)
 	}
 	digest, err := io.ReadAll(digestResp.Body)
 	if err != nil {
-		return "", "", err
+		return "", err
 	}
 
-	return responseJSON.TagName, strings.TrimSpace(string(digest)), nil
+	return strings.TrimSpace(string(digest)), nil
 }
 
 // FetchAttestationBundle fetches the sigstore bundle from a repo for a given repo and EIF hash