fix buffer import and use rollup for transpiling the package.

package.json

@@ -1,8 +1,10 @@
 {
   "name": "nostr-tools",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "description": "Tools for making a Nostr client.",
-  "main": "index.js",
+  "main": "dist/nostr-tools.esm.min.js",
+  "module": "dist/nostr-tools.esm.min.js",
+  "browser": "dist/nostr-tools.umd.min.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/fiatjaf/nostr-tools.git"
@@ -24,5 +26,14 @@
     "censorship",
     "censorship-resistance",
     "client"
-  ]
+  ],
+  "devDependencies": {
+    "rollup": "^2.61.1"
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "prepublish": "rollup -c"
+  }
 }

rollup.config.js

@@ -0,0 +1,16 @@
+import pkg from './package.json'
+
+export default {
+  input: 'src/index.js',
+  output: [
+    {
+      name: 'nostrtools',
+      file: pkg.browser,
+      format: 'umd'
+    },
+    {
+      file: pkg.module,
+      format: 'es'
+    }
+  ]
+}

src/event.js

@@ -1,3 +1,4 @@
+import Buffer from 'buffer'
 import * as secp256k1 from '@noble/secp256k1'
 
 import {sha256} from './utils'

src/index.js

@@ -21,3 +21,5 @@ export {
   getPublicKey,
   getBlankEvent
 }
+export * from './nip04'
+export * from './nip05'

src/nip04.js

@@ -1,3 +1,4 @@
+import Buffer from 'buffer'
 import * as secp256k1 from '@noble/secp256k1'
 
 export function encrypt(privkey, pubkey, text) {

src/nip05.js

@@ -1,3 +1,4 @@
+import Buffer from 'buffer'
 import dnsPacket from 'dns-packet'
 
 const dohProviders = [