Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction amount 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://letusbookmark.com/story22372910/not-known-factual-statements-about-blockchain-explorer-tool-https-squareblogs-net-heartgarlic3-delving-into-blockchain-explorers