From e886df7be7cc8ce0587ac6be1e51e06e4b36c3f6 Mon Sep 17 00:00:00 2001
From: Moe Jangda <moe@tbd.email>
Date: Fri, 13 Oct 2023 17:10:15 -0500
Subject: [PATCH] update how buffer is polyfilled to match approach taken by
 other packages in this repo

---
 package-lock.json                              |  1 +
 packages/dids/build/buffer-polyfill.cjs        |  3 ---
 packages/dids/build/esbuild-browser-config.cjs | 18 +++++++++++++++++-
 packages/dids/package.json                     |  1 +
 4 files changed, 19 insertions(+), 4 deletions(-)
 delete mode 100644 packages/dids/build/buffer-polyfill.cjs

diff --git a/package-lock.json b/package-lock.json
index c5803604c..e6267fa5d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10795,6 +10795,7 @@
         "eslint": "8.47.0",
         "karma": "6.4.1",
         "mocha": "10.2.0",
+        "node-stdlib-browser": "1.2.0",
         "rimraf": "4.4.0",
         "sinon": "15.0.2",
         "typescript": "5.1.6"
diff --git a/packages/dids/build/buffer-polyfill.cjs b/packages/dids/build/buffer-polyfill.cjs
deleted file mode 100644
index 8bd6256c2..000000000
--- a/packages/dids/build/buffer-polyfill.cjs
+++ /dev/null
@@ -1,3 +0,0 @@
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const { Buffer } = require('buffer');
-global.Buffer = Buffer;
diff --git a/packages/dids/build/esbuild-browser-config.cjs b/packages/dids/build/esbuild-browser-config.cjs
index 599cae57b..bbd62fbcb 100644
--- a/packages/dids/build/esbuild-browser-config.cjs
+++ b/packages/dids/build/esbuild-browser-config.cjs
@@ -1,3 +1,18 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+const polyfillProviderPlugin = require('node-stdlib-browser/helpers/esbuild/plugin');
+const stdLibBrowser = require('node-stdlib-browser');
+
+const requiredPolyfills = new Set(['buffer']);
+
+// populate object containing lib -> polyfill path
+const polyfills = {};
+for (let lib in stdLibBrowser) {
+  if (requiredPolyfills.has(lib)) {
+    const polyfill = stdLibBrowser[lib];
+    polyfills[lib] = polyfill;
+  }
+}
+
 /** @type {import('esbuild').BuildOptions} */
 module.exports = {
   entryPoints : ['./src/index.ts'],
@@ -7,7 +22,8 @@ module.exports = {
   minify      : true,
   platform    : 'browser',
   target      : ['chrome101', 'firefox108', 'safari16'],
-  inject      : ['./build/buffer-polyfill.cjs'],
+  inject      : [require.resolve('node-stdlib-browser/helpers/esbuild/shim')],
+  plugins     : [polyfillProviderPlugin(polyfills)],
   define      : {
     'global': 'globalThis',
   },
diff --git a/packages/dids/package.json b/packages/dids/package.json
index cac90d14c..2fd318563 100644
--- a/packages/dids/package.json
+++ b/packages/dids/package.json
@@ -102,6 +102,7 @@
     "eslint": "8.47.0",
     "karma": "6.4.1",
     "mocha": "10.2.0",
+    "node-stdlib-browser": "1.2.0",
     "rimraf": "4.4.0",
     "sinon": "15.0.2",
     "typescript": "5.1.6"