Replace-by-fee (RBF), explained
What is the replace-by-fee (RBF) policy? The Bitcoin network’s replace-by-fee (RBF) policy enables users to replace pending (unconfirmed) transactions with new ones with higher transaction costs. The RBF policy was proposed in BIP 125 and introduced as a feature in the Bitcoin protocol with the release of Bitcoin Core version 0.12.0, which was released in February