fix: Normalize asset IDs

This handles normalizing asset IDs when checking responses from
the backend.

This will allow us to use either `POL` or the normalized `pol` when
interacting with Assets / Asset IDs.

Previously if you passed a non-normalized asset ID, e.g. `POL`,
then when we check the asset ID v.s. the returned model it would
not equal `pol`.

src/coinbase/asset.ts

@@ -44,14 +44,15 @@ export class Asset {
       throw new Error("Invalid asset model");
     }
 
+
     let decimals = model.decimals!;
     // TODO: Push this logic down to the backend.
     if (
       assetId &&
       model.asset_id &&
       Coinbase.toAssetId(model.asset_id) !== Coinbase.toAssetId(assetId)
     ) {
-      switch (assetId) {
+      switch (Coinbase.toAssetId(assetId)) {
         case "gwei":
           decimals = GWEI_DECIMALS;
           break;
@@ -92,9 +93,11 @@ export class Asset {
    * @returns The primary denomination for the Asset ID.
    */
   public static primaryDenomination(assetId: string): string {
-    return [Coinbase.assets.Gwei, Coinbase.assets.Wei].includes(assetId)
+    const normalizedAssetId = Coinbase.toAssetId(assetId);
+
+    return [Coinbase.assets.Gwei, Coinbase.assets.Wei].includes(normalizedAssetId)
       ? Coinbase.assets.Eth
-      : assetId;
+      : normalizedAssetId;
   }
 
   /**

src/coinbase/coinbase.ts

@@ -57,6 +57,7 @@ export class Coinbase {
     Weth: "weth",
     Sol: "sol",
     Lamport: "lamport",
+    Pol: "pol",
   };
 
   static apiClients: ApiClients = {};
@@ -253,11 +254,12 @@ export class Coinbase {
 
   /**
    * Converts a string to a symbol, replacing hyphens with underscores.
+   * This also converts the string to lowercase.
    *
    * @param asset - The string to convert
    * @returns the converted symbol
    */
   static toAssetId(asset: string): string {
-    return asset.replace(/-/g, "_");
+    return asset.replace(/-/g, "_").toLowerCase();
   }
 }

src/tests/asset_test.ts

@@ -17,6 +17,20 @@ describe("Asset", () => {
       expect(asset.getAssetId()).toEqual(Coinbase.assets.Eth);
     });
 
+    describe("when the specified Asset ID is not normalized", () => {
+      it("should normalize the Asset ID", () => {
+        const model = {
+          asset_id: "pol",
+          network_id: Coinbase.networks.PolygonMainnet,
+          decimals: 18,
+        };
+        const asset = Asset.fromModel(model, "POL");
+        expect(asset).toBeInstanceOf(Asset);
+        expect(asset.getAssetId()).toEqual(Coinbase.assets.Pol);
+
+      });
+    });
+
     describe("when the model is invalid", () => {
       it("should throw an error", () => {
         expect(() => Asset.fromModel(null!)).toThrow("Invalid asset model");
@@ -34,6 +48,7 @@ describe("Asset", () => {
         expect(Asset.fromModel(model, Coinbase.assets.Gwei).decimals).toEqual(GWEI_DECIMALS);
       });
     });
+
     describe("when the asset_id is wei", () => {
       it("should set the decimals to 0", () => {
         const model = {
@@ -62,7 +77,7 @@ describe("Asset", () => {
   });
 
   describe(".primaryDenomination", () => {
-    ["wei", "gwei"].forEach(assetId => {
+    ["wei", "gwei", "WEI", "GWEI"].forEach(assetId => {
       describe(`when the assetId is ${assetId}`, () => {
         it("should return 'eth'", () => {
           expect(Asset.primaryDenomination(assetId)).toEqual("eth");

src/tests/wallet_address_test.ts

@@ -190,7 +190,7 @@ describe("WalletAddress", () => {
 
   it("should return an error for an unsupported asset", async () => {
     const getAddressBalance = mockReturnRejectedValue(new APIError(""));
-    const assetId = "unsupported-asset";
+    const assetId = "unsupportedasset";
     Coinbase.apiClients.externalAddress!.getExternalAddressBalance = getAddressBalance;
     await expect(address.getBalance(assetId)).rejects.toThrow(APIError);
     expect(getAddressBalance).toHaveBeenCalledWith(