If a bitcoin transaction's outputs have a locking script that is basically unsolvable, are the bitcoins lost, or can the transaction be invalidated? (Or something else?)
1 Answer
If it made it into the blockchain, meaning 1 confirmation or more, it practically can't be invalidated. The same feature prevents people from reversing payments.
If it's provably unsolvable, then there's no way to spend the coins, and they're practically destroyed.
scriptPubKeytoOP_RETURNand nothing else. This makes the transaction provably unspendable: en.bitcoin.it/wiki/…