UTXO Choice: How does a pockets determine which utxo to make use of?

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I’m utilizing a chilly pockets and made a number of tx two days in the past. Nevertheless, although what I needed to ship was a really small quantity of btc, the pockets made a number of utxo of giant quantities become involved and now all my property are locked up because the tx are unconfirmed.

Questions;

  1. Why does a pockets have to make use of a number of utxo (enter>output 2>2 or 3>2) somewhat than simply use one and cut up it in two (1>2)? (the aimed tx quantity is smaller than every utxo)
  2. Is the algorithm to pick out which utxo particular to every pockets or is there any normal rule all through bitcoin community?



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