Block top - The block number and length from the blockchain (in blocks) on development of the present block Nonce - The transaction selection with the from address (bear in mind this starts at 0 so a nonce of 100 would truly be the 101st transaction submitted by this account) https://bookmarkshut.com/story22190714/what-does-blockchain-explorer-usdt-mean-https-cuwip-ucsd-edu-members-georgeuncle0-activity-1839979