message: Assure number type because we want to use chain id since there can be naming mismatches between ethers networks and ours (i.e polygon, matic)
diff: @@ -2,7 +2,7 @@ import config from 'config';
  import { getWeb3ConfigByNetwork, JsonRpcProvider } from '@cardstack/cardpay-sdk';
  export default class EthersProvider {
  - getInstance(chainId: number | string) {
  + getInstance(chainId: number) {
  let rpcUrl = getWeb3ConfigByNetwork({ web3: config.get('web3') }, chainId).rpcNodeHttpsUrl;
  return new JsonRpcProvider(rpcUrl, chainId);
  }
  