user5152: I've read in "Mastering bitcoin" that a wallet can construct a transaction even if offline but is full-index client, I know full node is a client which holds the complete blockchain data.
is there a different between the two ? 
Another question is how do I know I'm running full node? does 40giga of data in the data folder is my confirmation of running full node and having the complete blockchain on the HD ? 

user8717: "Full-index client" is a term really coined by the author. I've never heard of it in the Bitcoin community. After reading the section in the book, it seems that a full-index client is just a client that holds all the data in the blockchain but is not necessarily a full node. To be a full node you must adhere with all of the bitcoin protocol. A full-index client might not adhere with the entire bitcoin protocol, but would still have the entire blockchain. Full-index simply means "holds all the data", but it might not be a full node. At least that's my interpretation.
To run a full node you must download Bitcoin Core, which is the only supported "full node" I am aware of.

5152: <p>I've read in "Mastering bitcoin" that a wallet can construct a transaction even if offline but is full-index client, I know full node is a client which holds the complete blockchain data.<br>
is there a different between the two ? 
Another question is how do I know I'm running full node? does 40giga of data in the data folder is my confirmation of running full node and having the complete blockchain on the HD ? </p>
 8717: <p>"Full-index client" is a term really coined by the author. I've never heard of it in the Bitcoin community. After reading <a href="http://chimera.labs.oreilly.com/books/1234000001802/ch02.html#_common_transaction_forms" rel="nofollow">the section in the book</a>, it seems that a full-index client is just a client that holds all the data in the blockchain but is not necessarily a full node. To be a full node you must adhere with all of the bitcoin protocol. A full-index client might not adhere with the entire bitcoin protocol, but would still have the entire blockchain. Full-index simply means "holds all the data", but it might not be a full node. At least that's my interpretation.</p>

<p>To run a full node you must download <a href="https://bitcoin.org/en/download" rel="nofollow">Bitcoin Core</a>, which is the only supported "full node" I am aware of.</p>
