chore: add ankr provider for celo

Author: Jipperism

lib/evmClient.ts

@@ -71,9 +71,19 @@ class FVMProvider implements RpcProvider {
   }
 }
 
+class AnkrProvider implements RpcProvider {
+  getUrl(chainId: number): string | undefined {
+    const urls: Record<number, string> = {
+      42220: `https://rpc.ankr.com/celo`,
+    };
+    return urls[chainId];
+  }
+}
+
 export class EvmClientFactory {
   private static readonly providers: RpcProvider[] = [
     new AlchemyProvider(),
+    new AnkrProvider(),
     new InfuraProvider(),
     new FVMProvider(),
     new DrpcProvider(),

test/lib/evmClient.test.ts

@@ -90,10 +90,9 @@ describe("RPC Providers", () => {
       expect(url).toContain("alchemy-key");
     });
 
-    it("should return Infura URL when Alchemy is not available", () => {
+    it("should return Ankr URL when Alchemy is not available", () => {
       const url = EvmClientFactory.getRpcUrl(42220); // Celo
-      expect(url).toContain("infura.io");
-      expect(url).toContain("infura-key");
+      expect(url).toContain("ankr.com");
     });
 
     it("should return ankr.com URL for Filecoin", () => {