Initial commit with translated description

scripts/shared/storage/challenge.js

@@ -0,0 +1,53 @@
+const { FileStorage } = require("./base");
+
+class ChallengeFileStorage extends FileStorage {
+  constructor(filename = "challenges.json") {
+    super(filename);
+  }
+
+  async save(did, challenge) {
+    const entries = await this.readFile();
+    const created_at = new Date();
+
+    const index = entries.findIndex((entry) => entry.did === did);
+
+    if (index >= 0) {
+      // Update existing entry
+      entries[index] = { did, challenge, created_at };
+    } else {
+      // Add new entry
+      entries.push({ did, challenge, created_at });
+    }
+
+    await this.writeFile(entries);
+  }
+
+  async find(did) {
+    const entries = await this.readFile();
+    return entries.find((entry) => entry.did === did);
+  }
+
+  async getChallenge(did) {
+    const entry = await this.find(did);
+    return entry?.challenge;
+  }
+
+  async list() {
+    return this.readFile();
+  }
+
+  async delete(did) {
+    const entries = await this.readFile();
+    const initialLength = entries.length;
+    const filtered = entries.filter((entry) => entry.did !== did);
+
+    if (filtered.length < initialLength) {
+      await this.writeFile(filtered);
+      return true;
+    }
+
+    return false;
+  }
+}
+
+module.exports = { ChallengeFileStorage };