Blockchain Explorer Optimism https://www.instapaper.com/p/16800704 Solana: Typically a couple of seconds to some minute. Nonetheless, in unusual situations, Solana blockchain transactions can continue to be unconfirmed for hrs as well as days These transactions stay in the mempool (memory pool) right up until a miner or validator selects them and features https://socialwoot.com/story22659950/blockchain-explorer-the-definitive-guide-to-blockchain-explorer-tron-https-cutt-ly-3rj9ygbc