Block top - The block number and length in the blockchain (in blocks) on creation of the present block Nonce - The transaction variety with the from address (bear in mind this starts at 0 so a nonce of 100 would truly be the a hundred and first transaction submitted https://optimusbookmarks.com/story20190614/blockchain-explorer-fundamentals-explained-https-md-entropia-de-aifurowaq7oqbm16-zzrcw