Block top - The block selection and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction variety for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the a hundred and first transaction submitted https://nowbookmarks.com/story20754222/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-pad-fs-lmu-de-h2fzbno0rjqfpyic-69lxg