Block top - The block variety and length of the blockchain (in blocks) on generation of the current block Nonce - The transaction number for your from address (bear in mind this starts off at 0 so a nonce of 100 would basically be the a hundred and first transaction https://pukkabookmarks.com/story20325186/new-step-by-step-map-for-blockchain-explorer-unconfirmed-transaction-https-articlescad-com-the-remarkable-adventurers-in-the-cyber-frontier-grasping-distributed-ledger-instruments-325096-html