Blockchain Explorer One https://intensedebate.com/people/cheeklivingsto So, when there is a lot of transactions inside the mempool and you also paid a relatively lower transaction charge, your transaction can remain unconfirmed for an prolonged time frame given that miners/validators will select transactions with bigger charges initial. The mempool essentially queues the transaction https://socialistener.com/story6359102/blockchain-explorer-api-explorer-blockchain-tron-options-https-cutt-ly-3rj9ygbc