Issue
Currently, method getTransaction only returns information referring to the wallet loaded in bitcoind, for other txHashes the method returns null. We want to obtain information of any transaction not only 'in-wallet'
NOTE: The root of the problem is the method gettransaction from bitcoind, we can use this method because only reports information about in-wallet transactions.
https://bitcoincore.org/en/doc/0.21.0/rpc/wallet/gettransaction/