lastAddress method Null safety
Get the last address @param {String} seed TransactionChain seed @param {String} endpoint
Implementation
Future<String> lastAddress(String seed, String endpoint) async {
final String genesisAddress = deriveAddress(seed, 0);
final int index =
await ApiService().getTransactionIndex(genesisAddress, endpoint);
final String lastAddress = deriveAddress(seed, index);
return lastAddress;
}