Block top - The block number and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction number for the from address (bear in mind this begins at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://livebackpage.com/story6141345/the-smart-trick-of-blockchain-explorer-app-that-nobody-is-discussing-https-www-mixcloud-com-brokerfridge5