Bitcoin Forum

tl;dr OP_CHECKLOCKTIMEVERIFY (OP_CLTV) is the latest function in Bitcoin. It allows people to lock their money until a specified time. It enables many interesting use cases that were not possible / not safe, such as Lightning Network, trustless cross chain exchange (e.g. BTC <-> LTC) and micropayment channels. It is the most exciting new function added to Bitcoin Protocol since Satoshi created it in 2009.

Since the code allows people to freeze their money until a specified time, some people call it OP_HODL. For example, if you want to make sure you will hodl your coins until 2017, no matter it will go to $0 or $1million, only BIP65 would allow you to do it safely (without the need to delete your private keys)

What could you do?

1. If you are pool operator or solo miner: Upgrade to Bitcoin Core 0.10.4 or 0.11.2

2. If you are mining for a pool: Please urge your pool operator to upgrade. Please switch to BIP65 supporting pools, including (as of 2015-11-30):

BiscusFish / F2Pool: https://www.f2pool.com/
BitAffNet: https://www.bitcoinaffiliatenetwork.com/
Solo CKPool: http://solo.ckpool.org/
BitClub Network: https://bitclubnetwork.com/
kano.is: http://www.kano.is/
BW: https://www.bw.com/
KNCMiner: http://www.kncminer.com/
Slush: https://mining.bitcoin.cz/
BTCC: https://pool.btcc.com/

Please let me know if I do not mention your BIP65 supporting pool

kano.is is also mining V4 blocks.

Update: BW pool is supporting BIP65.

ghash.io and bitfury are partially supporting

Please urge your pool to upgrade or switch to a supporting pool!

Over 60% of miners are mining for BIP65. If your pool is not listed in the OP, please urge them to upgrade or switch to a supporting pool!