Block Explorer Youtube https://output.jsbin.com/kefuguxaze/ So, when there is a large number of transactions inside the mempool therefore you compensated a comparatively lower transaction cost, your transaction can continue being unconfirmed for an extended period of time since miners/validators will pick out transactions with larger fees to start with. It is https://yxzbookmarks.com/story20198614/blockchain-explorer-api-the-ultimate-guide-to-explorer-blockchain-neo-https-cutt-ly-3rj9ygbc