I am trying to get the list of all transactions using the method
web3j.catchUpToLatestAndSubscribeToNewTransactionsObservable but a lot of them have a null receiver (Transaction.to).
Using etherscan.io and the
tx hash I can see that the receivers of those transactions are Contracts.
So is it correct to say that a transaction with null receiver is always a transaction to create or to interact with a smart contract?
Are there any other cases?