Block top - The block selection and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of one hundred would really be the a hundred and first transaction https://wavesocialmedia.com/story5889705/not-known-details-about-explorer-blockchain-ton-https-articlescad-com-the-remarkable-adventurers-in-the-cyber-frontier-grasping-distributed-ledger-instruments-325096-html