one click. You might be interested in Bitcoin if you like cryptography, distributed peer-to-peer systems, or economics. Related Posts, bitcoin Video Crash Course, dummy-proof explainer bitcoin speed up transaction videos enjoyed by over 100,000 students. Some other wallets do let you manually select which address should receive the change from a transaction. Selecting too many for a single transaction will result in a higher fee. You are at: Home fAQ advanced Questions »How to read a Bitcoin transaction. In my opinion, it might be better if the default client sent the change back to the sending address. However, refusing to use smaller utxos will leave your entire pool comprised of small ones, forcing you to use them (and pay higher fees) until your pool recovers. Utxos that you control. A good place to start might be @Murch's presentation at Scaling Bitcoin.
Bitcoin is a distributed, worldwide, decentralized digital money. There are pros and cons to different algorithms, especially when you are concerned with fees, so be sure to understand the ramifications of your decision. There was more than one output because you didn't have any previous transactions (sometimes thought of as "coins that added up the exact amount of the transaction. In that way, it's not even obvious whether your transaction was a payment.78 BTC with a change.22, or a payment.22 BTC with a change.78 BTC. So the.78 was the leftover amount and the client created a new address to hold it rather than reusing It seems that this behavior of the Qt client (silently creating new addresses that receive the change from transactions) was created for privacy reasons. We hate spam as much as you. Or if, at least, it showed that change address and its balance somewhere. So your client picked some coins that added up to at least that amount and then created a new address to receive the leftover amount. Is the change from the transaction. For that matter, you also get to choose the fee for the transaction, since any leftover from the sum of the inputs minus the sum of the outputs is the mining fee. If you are constructing your own transactions (rather than letting a wallet application do it for you then you get to choose which inputs and outputs you use in the transaction.
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