Hi there,

Can someone please explain the UTXO logic - why is 4 the result?

Rustie has 100 bitcoins stored in one UTXO. Derrick and Gloria both have 0 bitcoins. Rustie sends 50 to Derrick, who then sends 25 to Gloria and 15 back to Rustie. How many unique (spendable) UTXOs are left?

Thanks in advance,
Selter