Block top - The block number and length in the blockchain (in blocks) on development of the current block Nonce - The transaction selection 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://kbookmarking.com/story20693821/the-smart-trick-of-explorer-blockchain-ethereum-that-nobody-is-discussing-https-independent-academia-edu-drewandreassen4