Qtum Blockchain Explorer https://www.instapaper.com/p/16801288 Solana: Usually a couple of seconds to a minute. However, in uncommon circumstances, Solana blockchain transactions can remain unconfirmed for several hours or even times The mempool mainly queues the transaction and broadcasts it across all nodes during the chain. Consequently, the consumer has to attend https://mixbookmark.com/story5820055/blockchain-explorer-ethereum-blockchain-explorer-tools-fundamentals-explained-https-cutt-ly-3rj9ygbc