Block top - The block selection and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction variety with the from address (Remember this starts off at 0 so a nonce of a hundred would actually be the 101st transaction submitted by this account) https://social40.com/story5730026/5-easy-facts-about-blockchain-explorer-api-described-https-md-entropia-de-aifurowaq7oqbm16-zzrcw