Block top - The block number and length of the blockchain (in blocks) on generation 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://bookmarkquotes.com/story20928382/the-best-side-of-explorer-blockchain-usdt-https-md-swk-web-com-onnbpblstmy8giqdrhnkga