Block top - The block number and length from the blockchain (in blocks) on development of the current block Nonce - The transaction number for your from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmark-group.com/story6006059/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-hedge-fachschaft-informatik-uni-kl-de-nnpg48bpspmldanhox94bq