Block top - The block selection and length with the blockchain (in blocks) on development of the current block Nonce - The transaction amount to the from address (bear in mind this starts at 0 so a nonce of 100 would in fact be the a hundred and first transaction https://thebookpage.com/story5966536/top-guidelines-of-explorer-blockchain-solana-https-hedgedoc-digillab-uni-augsburg-de-mshxmk-praykwj94jou11g