Bitcoin Explorer Zpub https://www.instapaper.com/p/16801288 A blockchain unconfirmed transaction refers into a transaction initiated by a user that may be but to become confirmed and recorded on the blockchain by a validator or miner. It can be often known as a zero-confirmation transaction. These transactions stay in the mempool (memory pool) https://zanybookmarks.com/story20293731/blockchain-explorer-bitcoin-helping-the-others-realize-the-advantages-of-blockchain-explorer-mempool-https-cutt-ly-3rj9ygbc