Optimism Blockchain Explorer https://500px.com/p/nymandnjjxu So, if there is a large number of transactions in the mempool and you simply paid out a comparatively low transaction cost, your transaction can continue to be unconfirmed for an extended stretch of time given that miners/validators will select transactions with bigger expenses initial. These https://sociallweb.com/story5928659/eth-blockchain-explorer-explorer-blockchain-tron-options-https-cutt-ly-3rj9ygbc