Block top - The block number and length on the blockchain (in blocks) on development of the present block Nonce - The transaction number for your from address (Keep in mind this begins at 0 so a nonce of one hundred would actually be the a hundred and first transaction https://bookmarkusers.com/story20077283/the-smart-trick-of-explorer-blockchain-ethereum-that-nobody-is-discussing-https-articlescad-com-the-remarkable-adventurers-in-the-cyber-frontier-grasping-distributed-ledger-instruments-325096-html