From eb5c289b5b21932314447a9ec573e307fcf907a4 Mon Sep 17 00:00:00 2001
From: spsjvc <dragisaspasojevic@gmail.com>
Date: Mon, 11 Dec 2023 18:18:26 +0100
Subject: [PATCH] feat: block addresses from curated block list (#1351)

Co-authored-by: Harry Kalodner <harry@offchainlabs.com>
---
 packages/arb-token-bridge-ui/package.json            |  1 +
 .../arb-token-bridge-ui/src/pages/api/screenings.ts  |  8 ++++++++
 yarn.lock                                            | 12 ++++++++++++
 3 files changed, 21 insertions(+)

diff --git a/packages/arb-token-bridge-ui/package.json b/packages/arb-token-bridge-ui/package.json
index 72349cab23..8919aaf9e0 100644
--- a/packages/arb-token-bridge-ui/package.json
+++ b/packages/arb-token-bridge-ui/package.json
@@ -17,6 +17,7 @@
     "@tippyjs/react": "^4.2.6",
     "@uniswap/token-lists": "^1.0.0-beta.31",
     "@unstoppabledomains/resolution": "^8.3.3",
+    "@vercel/edge-config": "^0.4.1",
     "ajv": "^8.12.0",
     "ajv-formats": "^2.1.1",
     "axios": "^1.6.1",
diff --git a/packages/arb-token-bridge-ui/src/pages/api/screenings.ts b/packages/arb-token-bridge-ui/src/pages/api/screenings.ts
index 103b1f108b..4ac2bb875e 100644
--- a/packages/arb-token-bridge-ui/src/pages/api/screenings.ts
+++ b/packages/arb-token-bridge-ui/src/pages/api/screenings.ts
@@ -1,6 +1,7 @@
 import { NextApiRequest, NextApiResponse } from 'next'
 import { utils } from 'ethers'
 import withRetry from 'fetch-retry'
+import { has } from '@vercel/edge-config'
 
 function loadEnvironmentVariable(key: string): string {
   const value = process.env[key]
@@ -84,6 +85,13 @@ export default async function handler(
     return
   }
 
+  const isOnBlockList = await has(address)
+
+  if (isOnBlockList) {
+    res.status(200).send({ blocked: true })
+    return
+  }
+
   const requestData = [
     { address, chain: 'ethereum' },
     { address, chain: 'arbitrum' }
diff --git a/yarn.lock b/yarn.lock
index a6880ed45c..7698e4861b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2643,6 +2643,18 @@
   resolved "https://registry.yarnpkg.com/@vanilla-extract/sprinkles/-/sprinkles-1.5.0.tgz#c921183ae518bb484299c2dc81f2acefd91c3dbe"
   integrity sha512-W58f2Rzz5lLmk0jbhgStVlZl5wEiPB1Ur3fRvUaBM+MrifZ3qskmFq/CiH//fEYeG5Dh9vF1qRviMMH46cX9Nw==
 
+"@vercel/edge-config-fs@0.1.0":
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/@vercel/edge-config-fs/-/edge-config-fs-0.1.0.tgz#cda8327f611418c1d1cbb28c6bed02d782be928b"
+  integrity sha512-NRIBwfcS0bUoUbRWlNGetqjvLSwgYH/BqKqDN7vK1g32p7dN96k0712COgaz6VFizAm9b0g6IG6hR6+hc0KCPg==
+
+"@vercel/edge-config@^0.4.1":
+  version "0.4.1"
+  resolved "https://registry.yarnpkg.com/@vercel/edge-config/-/edge-config-0.4.1.tgz#c247011dcd05ce6a6b4d17139215c8f684d83cb3"
+  integrity sha512-4Mc3H7lE+x4RrL17nY8CWeEorvJHbkNbQTy9p8H1tO7y11WeKj5xeZSr07wNgfWInKXDUwj5FZ3qd/jIzjPxug==
+  dependencies:
+    "@vercel/edge-config-fs" "0.1.0"
+
 "@wagmi/chains@0.2.22":
   version "0.2.22"
   resolved "https://registry.yarnpkg.com/@wagmi/chains/-/chains-0.2.22.tgz#25e511e134a00742e4fbf5108613dadf876c5bd9"