Added logic to use an internal SpamToken image to TokenImageFetcherImpl instead of fetching it over the network

AlphaWallet/AppCoordinator.swift

@@ -224,7 +224,7 @@ class AppCoordinator: NSObject, Coordinator {
     private let addressStorage: FileAddressStorage
     private let tokenScriptOverridesFileManager = TokenScriptOverridesFileManager()
 
-    private let tokenImageFetcher: TokenImageFetcher = TokenImageFetcherImpl(networking: KingfisherImageFetcher())
+    private lazy var tokenImageFetcher: TokenImageFetcher = TokenImageFetcherImpl(networking: KingfisherImageFetcher(), tokenGroupIdentifier: tokenGroupIdentifier, spamImage: R.image.spamSmall()!)
 
     private let tokenGroupIdentifier: TokenGroupIdentifierProtocol = TokenGroupIdentifier.identifier(fromFileName: "tokens")!
 

AlphaWallet/Resources/Assets.xcassets/spam-small.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "spam-small.png",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

modules/AlphaWalletFoundation/AlphaWalletFoundation/Tokens/TokenImageFetcher.swift

@@ -71,14 +71,20 @@ public protocol TokenImageFetcher {
 
 public class TokenImageFetcherImpl: TokenImageFetcher {
     private let networking: ImageFetcher
+    private let tokenGroupsIdentifier: TokenGroupIdentifierProtocol
+    private let spamImage: UIImage
     private let subscribables: AtomicDictionary<String, CurrentValueSubject<TokenImage?, Never>> = .init()
 
     enum ImageAvailabilityError: LocalizedError {
         case notAvailable
     }
 
-    public init(networking: ImageFetcher) {
+    public init(networking: ImageFetcher,
+                tokenGroupIdentifier: TokenGroupIdentifierProtocol,
+                spamImage: UIImage) {
         self.networking = networking
+        self.tokenGroupsIdentifier = tokenGroupIdentifier
+        self.spamImage = spamImage
     }
 
     private static func programmaticallyGenerateIcon(for contractAddress: AlphaWallet.Address,
@@ -132,12 +138,12 @@ public class TokenImageFetcherImpl: TokenImageFetcher {
 
         switch type {
         case .nativeCryptocurrency:
-            if let img = serverIconImage {
-                return .init(image: .image(.loaded(image: img)), isFinal: true, overlayServerIcon: nil)
+            if let img = iconImageForContractAndChainID(image: serverIconImage, address: contractAddress.eip55String, chainID: server.chainID) {
+                return TokenImage(image: .image(.loaded(image: img)), isFinal: true, overlayServerIcon: nil)
             }
         case .erc20, .erc875, .erc721, .erc721ForTickets, .erc1155:
-            if let img = tokenImage {
-                return .init(image: .image(.loaded(image: img)), isFinal: true, overlayServerIcon: staticOverlayIcon)
+            if let img = iconImageForContractAndChainID(image: tokenImage, address: contractAddress.eip55String, chainID: server.chainID) {
+                return TokenImage(image: .image(.loaded(image: img)), isFinal: true, overlayServerIcon: staticOverlayIcon)
             }
         }
 
@@ -151,6 +157,13 @@ public class TokenImageFetcherImpl: TokenImageFetcher {
             blockChainNameColor: blockChainNameColor)
     }
 
+    private func iconImageForContractAndChainID(image iconImage: UIImage?, address: String, chainID: Int) -> UIImage? {
+        if tokenGroupsIdentifier.isSpam(address: address, chainID: chainID) {
+            return spamImage
+        }
+        return iconImage
+    }
+
     public func image(contractAddress: AlphaWallet.Address,
                       server: RPCServer,
                       name: String,