Diving Deep into UTXO Mechanics

stacksats · 2025-08-30T12:36:00.000Z

What happens if a transaction tries to spend a UTXO that's already been spent? How do nodes catch that in the mempool and block validation? Is it enough that spent UTXOs just vanish from the mempool?

20 replies 302 views

ben.matrixNewbie

Posts: 3523 · Reputation: 35

#21Sep 5, 2025, 08:25 AM

For sure! That’s why you can't sync the chain from a pruned node.

5 Reply Quote Share

?Reply

Diving Deep into UTXO Mechanics

Related topics