Block Explorer Nexus https://www.instapaper.com/p/16801185 Solana: Ordinarily a handful of seconds to a moment. However, in rare cases, Solana blockchain transactions can remain unconfirmed for hours or perhaps times These transactions stay in the mempool (memory pool) until finally a miner or validator selects them and incorporates them in a block. https://digibookmarks.com/story20382281/blockchain-explorer-tron-about-blockchain-explorer-search-https-cutt-ly-3rj9ygbc