Allow only Layer1 / Layer2 to be passed in for fromEthersProvider

[fionnachan]

Currently Resolution.fromEthersProvider can only be used with two types of params:

1. Resolution.fromEthersProvider({}) (because the networks {} is not optional)

2.  Resolution.fromEthersProvider({uns: {
        locations: {
          Layer1: {
            network: 'mainnet',
            provider: mainnetProvider
          },
          Layer2: {
            network: 'polygon-mainnet',
            provider: polygonProvider
          }
        }
    }});

I'd like to only resolve UD in Layer1, but not passing Layer2 would throw the following error:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'network')
    at Resolution.fromEthersProvider (Resolution.js:320:1)
    at tryLookupUDName (HeaderAccountPopover.tsx:64:1)
    at resolveENSInfo (HeaderAccountPopover.tsx:118:1)
    at HeaderAccountPopover.tsx:128:1
    at invokePassiveEffectCreate (react-dom.development.js:23487:1)
    at HTMLUnknownElement.callCallback (react-dom.development.js:3945:1)
    at Object.invokeGuardedCallbackDev (react-dom.development.js:3994:1)
    at invokeGuardedCallback (react-dom.development.js:4056:1)
    at flushPassiveEffectsImpl (react-dom.development.js:23574:1)
    at unstable_runWithPriority (scheduler.development.js:468:1)
    at runWithPriority$1 (react-dom.development.js:11276:1)
    at flushPassiveEffects (react-dom.development.js:23447:1)
    at react-dom.development.js:23324:1
    at workLoop (scheduler.development.js:417:1)
    at flushWork (scheduler.development.js:390:1)
    at MessagePort.performWorkUntilDeadline (scheduler.development.js:157:1)

Could you please allow only passing in one location?

Reference

resolution/src/Resolution.ts

Lines 387 to 421 in 62dd1cc

	static fromEthersProvider(networks: {
	uns?: {
	locations: {
	Layer1: {
	network: string;
	provider: EthersProvider;
	};
	Layer2: {
	network: string;
	provider: EthersProvider;
	};
	};
	};
	}): Resolution {
	return this.fromEthereumEip1193Provider({
	uns: networks.uns
	? {
	locations: {
	Layer1: {
	network: networks.uns.locations.Layer1.network,
	provider: Eip1193Factories.fromEthersProvider(
	networks.uns.locations.Layer1.provider,
	),
	},
	Layer2: {
	network: networks.uns.locations.Layer2.network,
	provider: Eip1193Factories.fromEthersProvider(
	networks.uns.locations.Layer2.provider,
	),
	},
	},
	}
	: undefined,
	});
	}