Block top - The block selection and length in the blockchain (in blocks) on creation of the present block Nonce - The transaction number for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmarksea.com/story20457495/the-best-side-of-explorer-blockchain-usdt-https-case-edu-cgi-bin-newsline-pl-url-https-cryptoexplorerhub-com