Block top - The block selection and length of the blockchain (in blocks) on development of the current block Nonce - The transaction selection for the 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://cheapbookmarking.com/story20210619/helping-the-others-realize-the-advantages-of-blockchain-explorer-one-https-independent-academia-edu-drewandreassen4