Ether Blockchain Explorer https://www.instapaper.com/p/16801288 A blockchain unconfirmed transaction refers to some transaction initiated by a consumer that is nevertheless to be confirmed and recorded about the blockchain by a validator or miner. It is actually also referred to as a zero-affirmation transaction. These transactions remain in the mempool (memory pool) https://greatbookmarking.com/story20404354/blockchain-explorer-unconfirmed-transaction-helping-the-others-realize-the-advantages-of-blockchain-explorer-mempool-https-cutt-ly-3rj9ygbc