Bitcoin White Paper: 9. Combining and Splitting Value
Although it would be possible to handle coins individually, it would be unwieldy to make a separate transaction for every cent in a transfer. To allow value to be split and combined, transactions contain multiple inputs and outputs. Normally there will be either a single input from a larger previous transaction or multiple inputs combining smaller amounts, and at most twooutputs: one for the payment, and one returning the change, if any, back to the sender.
07/15/2019 - 18:34