Block top - The block range and length of the blockchain (in blocks) on creation of the present block Nonce - The transaction variety for your from address (Remember this begins at 0 so a nonce of a hundred would in fact be the 101st transaction submitted by this account) https://digibookmarks.com/story20549306/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-list-ly-churchkjeldsen86wpibju