Topic: hELp mE uDeRStaNd di$ biTcoIN TRanSactioN plEase! - page 2. (Read 1903 times)

Hmm probally just had the inputs broken up into pieces
See change
https://en.bitcoin.it/wiki/Change

When the output of a transaction is used as the input of another transaction, it must be spent in its entirety. Sometimes the coin value of the output is higher than what the user wishes to pay. In this case, the client generates a new Bitcoin address, and sends the difference back to this address. This is known as change.

Take the case of the transaction http://blockchain.info/tx/0a1c0b1ec0ac55a45b1555202daf2e08419648096f5bcc4267898d420dffef87, a 10.89 BTC previously unspent output was spent by the client. 10 BTC was the payment amount, and 0.89 BTC was the amount of change returned. The client can't spend just 10.00 BTC out of a 10.89 BTC payment anymore than a person can spend $1 out of a $20 bill. The entire 10.89 BTC unspent output became the input of this new transaction and in the process produced are two new unspent outputs which have a combined value of 10.89 BTC. The 10.89 BTC is now "spent" and effectively destroyed because the network will prevent it from ever being spent again. Those unspent outputs can now become inputs for future transactions.

In this transaction, the fee is 0 but if there was a tx fee paid it would be the difference between the inputs and the outputs. (i.e. 10.89 BTC input and a 10.88 BTC output = 0.01 BTC fee).

In other words the balance is there
Blockchain is a rough measure the amount in an address may not be exactly the total amount that's actually in there because everytime a transaction is spent change is created and put in another address
When they are added back together they become a full balance.

I am using BlockChain.info as my online wallet.

I received 20 mBTC from somebody (that's 0.00020 BTC), and it went to my Bitcoin wallet residing in Blockchain.info

Here is that transaction:

 https://blockchain.info/tx/ab26e27cac9252a676d1665de2cb49196399fdb40d534bb6f28f9a2adf104815

What I don't understand is, in bold:

(1) why did it take so much money to transfer this tiny amount of 0.0020 = 2.0 mBTC, and why the amounts do not add up specifically:

Inputs and Outputs
Total Input   0.00239289 BTC  82 cents
Total Output   0.00229289 BTC   78 cents
Fees   0.0001 BTC  about 4 cents
Estimated BTC Transacted   0.002 BTC  <--but I only got 68 cents, why was 10 cents taken?  By the miners?  But I thought this was the "Fee" of 0.0001 BTC?

(2)  Next, I decided to send some of this money to another online wallet that I have.  The address is here: 12sa4kdJGjBU3amUn3GsLYmMYq1Nd6G5Xy   

Here is the record of that transaction: 
https://blockchain.info/address/12sa4kdJGjBU3amUn3GsLYmMYq1Nd6G5Xy

what is strange is:  I sent 0.4 mBTC (0.00040), and I got it almost instantly, but Blockchain.info shows it cost 0.0014 BTC !  Why do much money taken for the transaction?

(3) Further, as a privacy violation, the entire world seems to be seeing my balance in my wallet: https://blockchain.info/tx/2282f8922119c3d6900450695af0926dfeaba4e3818ebf93d5c60ac15e9183f5 
(0.0006 BTC left)

How does the entire world know that I received 2.0 mBTC, sent 0.4 mBTC, and am only left (of the original 2.0 mBTC) with only 0.6 mBTC?  Is that supposed to be public knowledge?  And, as before, why are such big amounts taken from my initial sum, just for sending small micropayments?

I am left with 0.6 mBTC (in my Blockchain.info wallet) + 0.4 mBTC (in my online wallet) = 1.0 mBTC out of a initial sum of 2.0 mBTC, so half my money was taken by the miners in just one micro transaction?

Until I get answers to this question I will be very afraid of using BTC.