diff --git a/src/utils.js b/src/utils.js
new file mode 100644
index 0000000..0a333d5
--- /dev/null
+++ b/src/utils.js
@@ -0,0 +1,17 @@
+const generateClaim = (spData) => {
+  switch (spData.claim.format) {
+    case 'uri':
+      return `openpgp4fpr:${spData.claim.fingerprint}`
+      break;
+    case 'message':
+      return `[Verifying my OpenPGP key: openpgp4fpr:${spData.claim.fingerprint}]`
+      break;
+    case 'fingerprint':
+      return pData.claim.fingerprint
+      break;
+    default:
+      throw new Error('No valid claim format')
+  }
+}
+
+exports.generateClaim = generateClaim