Port strfry policies to @nostrify/policies

Use packages from JSR and adapt code for new policy APIs

extras/strfry/ldap-policy.ts

@@ -1,8 +1,8 @@
-import type { IterablePubkeys, Policy } from 'https://gitlab.com/soapbox-pub/strfry-policies/-/raw/develop/mod.ts';
+import { NostrEvent, NostrRelayInfo, NostrRelayOK, NPolicy } from 'jsr:@nostrify/types@^0.35.0';
+import { nip57 } from 'jsr:@nostr/tools';
 import { Client } from 'npm:ldapts';
-import { nip57 } from '@nostr/tools';
 
-interface LdapConfig {
+export interface LdapConfig {
   url: string;
   bindDN: string;
   password: string;
@@ -10,68 +10,73 @@ interface LdapConfig {
   whitelistPubkeys?: IterablePubkeys;
 }
 
-const ldapPolicy: Policy<LdapConfig> = async (msg, opts) => {
-  const client = new Client({ url: opts.url });
-  const { kind, tags } = msg.event;
-  let { pubkey } = msg.event;
-  let out = { id: msg.event.id }
+export class LdapPolicy implements NPolicy {
+  constructor(private opts: LdapConfig) {}
 
-  if (opts.whitelistPubkeys.includes(pubkey)) {
-    out['action'] = 'accept';
-    out['msg'] = '';
-    return out;
-  }
+  // deno-lint-ignore require-await
+  async call(event: NostrEvent): Promise<NostrRelayOK> {
+    const client = new Client({ url: this.opts.url });
+    const { id, kind, tags } = event;
+    let { pubkey } = event;
 
-  // Zap receipt
-  if (kind === 9735) {
-    const descriptionTag = tags.find(([t, v]) => t === 'description' && v);
-    const invalidZapRequestMsg = 'Zap receipts must contain a valid zap request from a relay member';
-
-    if (typeof descriptionTag === 'undefined') {
-      out['action'] = 'reject';
-      out['msg'] = invalidZapRequestMsg;
-      return out;
+    if (this.opts.whitelistPubkeys.includes(pubkey)) {
+      return ['OK', id, true, ''];
     }
 
-    const zapRequestJSON = descriptionTag[1];
-    const validationResult = nip57.validateZapRequest(zapRequestJSON);
+    // Zap receipt
+    if (kind === 9735) {
+      const descriptionTag = tags.find(([t, v]) => t === 'description' && v);
+      const invalidZapRequestMsg = 'Zap receipts must contain a valid zap request from a relay member';
 
-    // TODO
-    // The zap receipt event's pubkey MUST be the same as the recipient's lnurl provider's nostrPubkey (retrieved in step 1 of the protocol flow).
-    // The invoiceAmount contained in the bolt11 tag of the zap receipt MUST equal the amount tag of the zap request (if present).
+      if (typeof descriptionTag === 'undefined') {
+        return ['OK', id, false, invalidZapRequestMsg];
+      }
 
-    if (validationResult === null) {
-      pubkey = JSON.parse(zapRequestJSON).pubkey;
-    } else {
-      out['action'] = 'reject';
-      out['msg'] = invalidZapRequestMsg;
-      return out;
+      const zapRequestJSON = descriptionTag[1];
+      const validationResult = nip57.validateZapRequest(zapRequestJSON);
+
+      // TODO
+      // The zap receipt event's pubkey MUST be the same as the recipient's lnurl provider's nostrPubkey (retrieved in step 1 of the protocol flow).
+      // The invoiceAmount contained in the bolt11 tag of the zap receipt MUST equal the amount tag of the zap request (if present).
+
+      if (validationResult === null) {
+        pubkey = JSON.parse(zapRequestJSON).pubkey;
+      } else {
+        return ['OK', id, false, invalidZapRequestMsg];
+      }
+    }
+
+    const out = { accept: true, msg: ''};
+
+    try {
+      await client.bind(this.opts.bindDN, this.opts.password);
+
+      const { searchEntries } = await client.search(this.opts.searchDN, {
+        filter: `(nostrKey=${pubkey})`,
+        attributes: ['nostrKey']
+      });
+      const memberKey = searchEntries[0]?.nostrKey;
+
+      if (memberKey === pubkey) {
+        out['accept'] = true;
+      } else {
+        out['accept'] = false;
+        out['msg'] = 'Only members can publish notes on this relay';
+      }
+    } catch (ex) {
+      out['accept'] = false;
+      out['msg'] = 'Auth service temporarily unavailable';
+    } finally {
+      await client.unbind();
+      return ['OK', id, out['accept'], out['msg']];
     }
   }
 
-  try {
-    await client.bind(opts.bindDN, opts.password);
-
-    const { searchEntries } = await client.search(opts.searchDN, {
-      filter: `(nostrKey=${pubkey})`,
-      attributes: ['nostrKey']
-    });
-    const memberKey = searchEntries[0]?.nostrKey;
-
-    if (memberKey === pubkey) {
-      out['action'] = 'accept';
-      out['msg'] = '';
-    } else {
-      out['action'] = 'reject';
-      out['msg'] = 'Only members can publish notes on this relay';
-    }
-  } catch (ex) {
-    out['action'] = 'reject';
-    out['msg'] = 'Auth service temporarily unavailable';
-  } finally {
-    await client.unbind();
-    return out;
+  get info(): NostrRelayInfo {
+    return {
+      limitation: {
+        restricted_writes: true,
+      },
+    };
   }
-};
-
-export default ldapPolicy;
+}