Add reactions to configuration to allow different zaps values. Update…

… ZAP_VALUE to DEFAULT_ZAP_VALUE.

README.md

@@ -32,7 +32,8 @@ Modify the environment variables file:
 - USER_SECRET_KEY : Your hex secret key
 - NOSTR_RELAYS : A list of relays comma separated
 - LNDHUB_URL : LNDHub server
-- ZAP_VALUE : Zap amount
+- DEFAULT_ZAP_VALUE : Default zap amount, empty if you only want specific reactions zaps.
+- REACTION_VALUE_* : Reaction zap value. Emoji or string and value. Sample: 🤙|21 - +|1
 
 * There is a known bug with yarn build in nostr-relaypool library
 

src/actions/doPayment.ts

@@ -2,20 +2,30 @@ import { finishEvent, nip57, type Event as NostrEvent } from 'nostr-tools';
 import fetch from 'node-fetch';
 
 import { pool } from '..';
-import { nostrRelays, publicKey, secretKey, zapValue } from '../constants/config';
+import { nostrRelays, reactionsValues, secretKey, zapValue } from '../constants/config';
 import { getProfile } from './profile';
 import { connectToLndhubApi } from '../utils/lndhubapi';
 import { saveZap, zapExists } from '../utils/database';
 
 export const doPayment = async (event: NostrEvent) => {
+  const { content } = event;
+  const isReaction = reactionsValues.filter(reaction => reaction.type === content);
+  let amount = 0;
+
+  if (isReaction.length) {
+    console.log(event);
+    amount = isReaction[0].value;
+  } else {
+    amount = parseInt(zapValue);
+  }
+
   const authorTag = event.tags.filter((tag: string[]) => tag[0] === 'p');
   const noteTag = event.tags.filter((tag: string[]) => tag[0] === 'e');
   const author = authorTag.length ? authorTag[0][1] : '';
   const note = noteTag.length ? noteTag[0][1] : '';
 
-  if (!zapExists(note)) {
+  if (!zapExists(note) && amount && author) {
     console.log(`Starting payment to ${note}.`);
-    const amount = parseInt(zapValue);
     const invoice = await createInvoice(author, note, amount);
     const lndhub = await connectToLndhubApi();
 

src/actions/profile.ts

@@ -45,7 +45,7 @@ export const getMetadata = async (authorId: string, kind: Kind = Kind.Metadata)
   return metadata;
 };
 
-export const extractProfileMetadataContent = (profileMetadata: any) => JSON.parse(profileMetadata.content);
+export const extractProfileMetadataContent = (profileMetadata: any) => profileMetadata?.content && JSON.parse(profileMetadata.content) || {};
 
 export const getProfile = async (authorId: string): Promise<any> => {
   const metadataPromise = getMetadata(authorId);

src/constants/config.ts

@@ -1,12 +1,30 @@
 import dotenv from 'dotenv';
-import {  nip19 } from 'nostr-tools';
+import { nip19 } from 'nostr-tools';
+
+import { Reaction } from 'src/interfaces/config';
 
 dotenv.config();
 
 const nPubKey = process.env.USER_PUBLIC_KEY;
 const serverRelays = process.env.NOSTR_RELAYS;
 
 export const secretKey = process.env.USER_SECRET_KEY ?? '';
-export const zapValue = process.env.ZAP_VALUE ?? "0";
+export const zapValue = process.env.DEFAULT_ZAP_VALUE ?? "0";
 export const publicKey = nip19.decode(nPubKey ?? '');
 export const nostrRelays = serverRelays?.split(',') || [];
+
+const reactions: Reaction[] = [];
+
+Object.keys(process.env).forEach((element) => {
+  if (element.startsWith('REACTION_VALUE') && !!process.env[element]) {
+    const value = process.env[element]?.split('|');
+
+    if (value?.[0]) {
+      const reaction = { type: value[0], value: parseInt(value[1]) };
+      reactions.push(reaction);
+    }
+  }
+});
+
+export const reactionsValues = reactions;
+

src/interfaces/config.ts

@@ -0,0 +1,4 @@
+export interface Reaction {
+  type: string;
+  value: number;
+}