Block top - The block number and length in the blockchain (in blocks) on creation of the current block Nonce - The transaction range with 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://bookmarkindexing.com/story20126501/5-simple-statements-about-blockchain-explorer-solana-explained-https-files-fm-f-e6nkandt95