Quote from: upal on April 12, 2014, 07:04:04 PM

Quote from: Vinz87 on April 12, 2014, 03:03:48 PM

Hi,
I read about technical rules for transaction fees in the official bitcoin wiki, where there's written:

Sending
A transaction may be safely sent without fees if these conditions are met:

It is smaller than 1,000 bytes.
All outputs are 0.01 BTC or larger.
Its priority is large enough (see the Technical Info section below)

The "technical info section" below explain how to compute the "Priority", and that it has to be greater than 57600000.

Now I want to build a raw transaction and I want to know if it can be safely propagated without fees.
I did the math with all the unspent outputs I would take coins from, and it results in a priority of only 3.6M.
Moreover, I tried to build the raw transaction, and it would consist of 2972 hex characters, or 1486 bytes.
There will be only one output of 0.01 BTC.

So what I ask is: can I wait until the unspent outputs will be older enough to yield a priority greater than 57.6M, and send the transaction with 0 fees even if its size is greater than 1kB?
Or, since I am not under the size limit, a 0.0001 (or 0.0002?) BTC fee is required for a 1500 bytes transaction, regardless of the calculated priority?

Thanks

To get quickly included in the block, it is always preferable to add at least 0.0001 BTC, however small your Tx size is...

not if priority is greater than 57600000, according to the official wiki.