Block top - The block selection and size from the blockchain (in blocks) on generation of the present block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://apollobookmarks.com/story20165370/everything-about-blockchain-explorer-https-pad-fs-lmu-de-h2fzbno0rjqfpyic-69lxg