StaticJsonProvider in v6

[alessandroaw]

I want to use a FallbackProvider to fail over if one RPC fails, and I found in discussion #3500 that to achieve this we need to first specify all the network in the provider. Specifically I need to use StaticJsonProvider to ensure the network won't change. But I can't find any documentation on StaticJsonProvider in v6. Is there any info on how to use it in v6? Or is there other way to achieve my goal without StaticJsonProvider?

[ricmoo]

Oh, sorry. In v6 the static part is built into the normal JsonRpcProvider; new JsonRpcProvider(irl, network, { staticNetwork: network }). The value to static network must currently be a Network object (you can use Network.from to create one), but I will be adding an auto-detect feature in the near future.

Does that make sense?

[alessandroaw]

Ah I see, after a couple of tries I got it working. It should be like this right?

const SEPOLIA_CHAIN_ID = 11155111;
const network = Network.from(SEPOLIA_CHAIN_ID);
// Create provider with static network
const getProvider = (url: string) => {
  return new JsonRpcProvider(url, network, {
    staticNetwork: network,
  });
};

const provider_1 = getProvider(PROVIDER_URL);
const provider_2 = getProvider(PROVIDER_URL_FALLBACK);
const provider_3 = getProvider(PROVIDER_URL_FALLBACK_PUBLIC);
const provider = new FallbackProvider(
  [
    { provider: provider_1, priority: 1, weight: 1 },
    { provider: provider_2, priority: 2, weight: 1 },
    { provider: provider_3, priority: 3, weight: 1 },
  ],
  1
);

[ricmoo]

Yupp, that should work fine. :)