Get isEthereum from chain properties (#9667)

* Get isEthereum from chain properties

* Set isEthereum in registry

* Update with latest api changes

* Lint

packages/react-api/src/Api.tsx

@@ -121,6 +121,7 @@ async function retrieve (api: ApiPromise, injectedPromise: Promise<InjectedExten
  !DISALLOW_EXTENSIONS.includes(source)
  ),
  properties: statics.registry.createType('ChainProperties', {
+ isEthereum: api.registry.chainIsEthereum,
  ss58Format: api.registry.chainSS58,
  tokenDecimals: api.registry.chainDecimals,
  tokenSymbol: api.registry.chainTokens
@@ -142,14 +143,15 @@ async function loadOnReady (api: ApiPromise, endpoint: LinkOption | null, inject
  : settings.prefix;
  const tokenSymbol = properties.tokenSymbol.unwrapOr([formatBalance.getDefaults().unit, ...DEFAULT_AUX]);
  const tokenDecimals = properties.tokenDecimals.unwrapOr([DEFAULT_DECIMALS]);
- const isEthereum = ethereumChains.includes(api.runtimeVersion.specName.toString()) || urlIsEthereum;
+ const isEthereum = properties.isEthereum.isTrue || ethereumChains.includes(api.runtimeVersion.specName.toString()) || urlIsEthereum;
  const isDevelopment = (systemChainType.isDevelopment || systemChainType.isLocal || isTestChain(systemChain));
 
  console.log(`chain: ${systemChain} (${systemChainType.toString()}), ${stringify(properties)}`);
 
  // explicitly override the ss58Format as specified
  statics.registry.setChainProperties(
  statics.registry.createType('ChainProperties', {
+ isEthereum,
  ss58Format,
  tokenDecimals,
  tokenSymbol