Reapply "Merge pull request #477 from blockchain/FC-1637-list-ada-tokens" (#483) (#484)

This reverts commit fc626d7.

Author: vlenoir-bc

custody.json

@@ -1560,6 +1560,24 @@
     },
     "hwsSettings": null
   },
+  {
+    "symbol": "SNEK.ADA",
+    "displaySymbol": "SNEK",
+    "type": "CARDANO_TOKEN",
+    "nabuSettings": {
+      "custodialPrecision": 0
+    },
+    "hwsSettings": null
+  },
+  {
+    "symbol": "NIGHT.ADA",
+    "displaySymbol": "NIGHT",
+    "type": "CARDANO_TOKEN",
+    "nabuSettings": {
+      "custodialPrecision": 6
+    },
+    "hwsSettings": null
+  },
   {
     "symbol": "SNX",
     "displaySymbol": "SNX",

scripts/check-lists.py

@@ -224,6 +224,8 @@ def load_ref(
         ref = chains_dict.get("SOL").get(original_symbol)
     elif currency_type == "JETTON":
         ref = chains_dict.get("TON").get(original_symbol)
+    elif currency_type == "CARDANO_TOKEN":
+        ref = chains_dict.get("ADA").get(original_symbol)
     return ref