Monad Blockchain Explorer https://www.instapaper.com/p/16800704 Solana: Normally a couple of seconds to some minute. Nevertheless, in uncommon instances, Solana blockchain transactions can remain unconfirmed for hours or even days These transactions remain in the mempool (memory pool) until a miner or validator selects them and contains them in a very block. https://echobookmarks.com/story20171363/blockchain-explorer-ethereum-tron-blockchain-explorer-for-dummies-https-cutt-ly-3rj9ygbc