Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction number with 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://socialnetworkadsinfo.com/story21881056/blockchain-explorer-usdt-trc20-fundamentals-explained-https-kearns-horn-hubstack-net-monitoring-transfers-how-distributed-ledger-analyzers-work