Block Explorer Optimism https://intensedebate.com/people/sheehan95henri A blockchain unconfirmed transaction refers to some transaction initiated by a person which is nonetheless to get confirmed and recorded around 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://hylistings.com/story21747768/blockchain-explorer-usdt-trc20-indicators-on-explorer-blockchain-ton-you-should-know-https-cutt-ly-3rj9ygbc