Blockchain Explorer Kaspa https://bbs.pku.edu.cn/v2/jump-to.php?url=https://cryptoexplorerhub.com Solana: Normally several seconds to some minute. Even so, in unusual circumstances, Solana blockchain transactions can continue being unconfirmed for several hours or simply times These transactions remain in the mempool (memory pool) till a miner or validator selects them and contains th... https://k12.instructure.com/eportfolios/1098588/entries/3707785