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CH02::coin selection: make its own subsection

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David A. Harding 2023-02-04 12:30:25 -10:00
parent a4327fa4fe
commit a20a159cb5
1 changed files with 7 additions and 3 deletions
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@ -261,9 +261,6 @@ like currency notes, cannot be divided. If you purchase a $5 US dollar
item in a store but use a $20 dollar bill to pay for the item, you
expect to receive $15 dollars in change. The same concept applies to
bitcoin transaction inputs. If you purchased an item that costs 5
Different wallets may use different strategies when aggregating inputs
to make a payment requested by the user. They might aggregate many small
bitcoins but only had an input worth 20 bitcoins to use, you would send one
output of 5 bitcoins to the store owner and one output of 15 bitcoins back
to yourself as change (not counting your transaction fee).
@ -280,6 +277,13 @@ otherwise look identical, preventing any third party from determining
which outputs are change and which are payments. However, for
illustration purposes, we've added shading to the change outputs in
<<transaction-chain>>.
==== Coin selection
Different wallets use different strategies when choosing which
inputs to use to a payment, called _coin selection_.
They might aggregate many small
inputs, or use one that is equal to or larger than the desired payment.
Unless the wallet can aggregate inputs in such a way to exactly match
the desired payment plus transaction fees, the wallet will need to