Block top - The block number and length from the blockchain (in blocks) on development of the current block Nonce - The transaction variety for 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://bookmarkunit.com/story20205603/blockchain-explorer-usdt-trc20-fundamentals-explained-https-skitterphoto-com-photographers-1387379-jimenez-deleuran