From 198e2a58dc935679c3734848c29b6454b02b0f02 Mon Sep 17 00:00:00 2001
From: Mark Nardi <nardimark7@gmail.com>
Date: Tue, 30 Apr 2024 12:13:47 +0200
Subject: [PATCH] check for scams on erc721

---
 .../utils/buildNftFromPersistedErc721Nft.ts   |  3 ++
 .../shared/src/lib/core/nfts/utils/index.ts   |  1 +
 .../lib/core/nfts/utils/isScamErc721Nft.ts    | 28 +++++++++++++++++++
 3 files changed, 32 insertions(+)
 create mode 100644 packages/shared/src/lib/core/nfts/utils/isScamErc721Nft.ts

diff --git a/packages/shared/src/lib/core/nfts/utils/buildNftFromPersistedErc721Nft.ts b/packages/shared/src/lib/core/nfts/utils/buildNftFromPersistedErc721Nft.ts
index d2e5dae504..0895967943 100644
--- a/packages/shared/src/lib/core/nfts/utils/buildNftFromPersistedErc721Nft.ts
+++ b/packages/shared/src/lib/core/nfts/utils/buildNftFromPersistedErc721Nft.ts
@@ -1,12 +1,15 @@
 import { DEFAULT_NFT_NAME, MimeType } from '@core/nfts'
 import { IErc721Nft, IPersistedErc721Nft } from '../interfaces'
+import { isScamErc721Nft } from './isScamErc721Nft'
 
 export function buildNftFromPersistedErc721Nft(nft: IPersistedErc721Nft, accountAddress: string): IErc721Nft {
     const isSpendable = nft.ownerAddress === accountAddress
+    const isScam = nft?.isScam ?? (nft.metadata ? isScamErc721Nft(nft.metadata) : false)
 
     return {
         ...nft,
         isSpendable,
+        isScam,
         name: nft.metadata?.name ?? nft.contractMetadata.name ?? DEFAULT_NFT_NAME,
         description: nft.metadata?.description,
         type: MimeType.ImagePng,
diff --git a/packages/shared/src/lib/core/nfts/utils/index.ts b/packages/shared/src/lib/core/nfts/utils/index.ts
index f8305f6b34..1303697b3f 100644
--- a/packages/shared/src/lib/core/nfts/utils/index.ts
+++ b/packages/shared/src/lib/core/nfts/utils/index.ts
@@ -12,6 +12,7 @@ export * from './getSpendableStatusFromUnspentNftOutput'
 export * from './isIrc27Nft'
 export * from './isNftLocked'
 export * from './isNftOwnedByAnyAccount'
+export * from './isScamErc721Nft'
 export * from './isScamIrc27Nft'
 export * from './isValidNftUri'
 export * from './isVisibleCollection'
diff --git a/packages/shared/src/lib/core/nfts/utils/isScamErc721Nft.ts b/packages/shared/src/lib/core/nfts/utils/isScamErc721Nft.ts
new file mode 100644
index 0000000000..2a6cddd66a
--- /dev/null
+++ b/packages/shared/src/lib/core/nfts/utils/isScamErc721Nft.ts
@@ -0,0 +1,28 @@
+import { appParameters } from '@core/app/stores'
+import { IErc721TokenMetadata } from '../interfaces'
+import { get } from 'svelte/store'
+
+export function isScamErc721Nft(metadata: IErc721TokenMetadata): boolean {
+    const { urls, keywords } = get(appParameters).denylists
+
+    if (
+        urls.some(
+            (url) =>
+                metadata?.name?.toLocaleLowerCase()?.includes(url) ||
+                metadata?.description?.toLocaleLowerCase()?.includes(url) ||
+                metadata?.image?.toLocaleLowerCase()?.includes(url)
+        )
+    ) {
+        return true
+    } else if (
+        keywords.some(
+            (phrase) =>
+                metadata?.name?.toLocaleLowerCase()?.includes(phrase) ||
+                metadata?.description?.toLocaleLowerCase()?.includes(phrase)
+        )
+    ) {
+        return true
+    } else {
+        return false
+    }
+}