Block top - The block selection and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction number for your from address (bear in mind this commences at 0 so a nonce of 100 would actually be the one hundred and first transaction submitted https://bookmarkshut.com/story22055256/5-essential-elements-for-blockchain-explorer-ethereum-https-www-blurb-com-user-optionname7