Block top - The block number and length from the blockchain (in blocks) on development of the present block Nonce - The transaction number for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the a hundred and first transaction submitted https://bookmarkmoz.com/story20531092/not-known-facts-about-blockchain-explorer-usdt-https-www-folkd-com-submit-cryptoexplorerhub-com