Block top - The block selection and duration of your blockchain (in blocks) on creation of the present block Nonce - The transaction quantity for the 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://linkingbookmark.com/story20490195/the-smart-trick-of-explorer-blockchain-ethereum-that-nobody-is-discussing-https-www-multichain-com-qa-user-knotdrop3