Blockchain Explorer Overview https://intensedebate.com/people/neergaard22nee Solana: Commonly a handful of seconds to a minute. Nevertheless, in rare instances, Solana blockchain transactions can remain unconfirmed for hrs and even days These transactions remain in the mempool (memory pool) until a miner or validator selects them and contains them in the block. BTC https://nybookmark.com/story22089640/tron-blockchain-explorer-the-basic-principles-of-blockchain-explorer-tron-https-cutt-ly-3rj9ygbc