Post
Topic
Board Bitcoin Discussion
Re: F2pool and 1mb spam block
by
ujka
on 07/07/2015, 19:56:36 UTC
It's a transaction to remove spam transactions from full node's unspent UTXO cache.
Long story: some spammer created thousands of spam transactions to bloat the network and the blockchain with outputs so small that spending would go all for fees. He then gave the private key of that address on reddit to fool with the bitcoiners there, but some guy created a script and swept the address. That way he removed all that small unspent spam UTXOs from full node's cache. (full nodes have to keep track of all unspent outputs. forever.)

https://www.reddit.com/r/Bitcoin/comments/3cf6qg/need_help_moving_coins_to_new_address/