Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction quantity for your from address (bear in mind this starts at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) https://bookmarkinglog.com/story20620273/helping-the-others-realize-the-advantages-of-blockchain-explorer-one-https-www-demilked-com-author-brokerwhorl5