add paywall to api

package.json

@@ -23,6 +23,7 @@
     "next": "^12.3.0",
     "node-twitter": "^0.5.3",
     "number-to-words": "^1.2.4",
+    "paymeformyapi": "^0.0.5",
     "react": "^18.2.0",
     "react-charts": "^3.0.0-beta.48",
     "react-dom": "^18.2.0",

src/pages/api/data.ts

@@ -1,8 +1,32 @@
-import { NextApiResponse, NextApiRequest } from "next"
-import { getData } from "core/data"
+import { NextApiResponse, NextApiRequest } from 'next'
+import PayMeForMyAPI from 'paymeformyapi'
+import { getData } from 'core/data'
+
+const paywall = new PayMeForMyAPI({
+  lnBitsAdminId: process.env.LN_BITS_ADMIN_ID,
+  lnBitsApiKey: process.env.LN_BITS_API_KEY,
+  lnBitsURL: process.env.LN_BITS_URL,
+  lnBitsAdminInvoiceKey: process.env.LN_BITS_ADMIN_INVOICE_KEY,
+  refillAmount: 50, // number of satoshis to refill
+  requestCost: 1, // number of satoshis per API call
+})
 
 export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+  const { api_token: api_token_from_request } = req.query
+
   try {
+    const { success, api_token, invoice } = await paywall.deductBalance(api_token_from_request as string)
+
+    if (!success) {
+      res.status(402).json({
+        statusCode: 402,
+        message: 'Payment required. Please pay the invoice and update your api token.',
+        api_token,
+        invoice,
+      })
+      return
+    }
+
     const { usd } = await getData()
 
     res.status(200).json({ usd })

yarn.lock

@@ -3665,6 +3665,13 @@
   "resolved" "https://registry.npmjs.org/path-type/-/path-type-4.0.0.tgz"
   "version" "4.0.0"
 
+"paymeformyapi@file:../paymeformyapi":
+  "resolved" "file:../paymeformyapi"
+  "version" "0.0.4"
+  dependencies:
+    "axios" "^1.4.0"
+    "uuid" "^9.0.0"
+
 "pend@~1.2.0":
   "integrity" "sha512-F3asv42UuXchdzt+xXqfW1OGlVBe+mxa2mqI0pg5yAHZPvFmY3Y6drSf/GQ1A86WgWEN9Kzh/WrgKa6iGcHXLg=="
   "resolved" "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz"