Block top - The block number and length on the blockchain (in blocks) on generation of the current block Nonce - The transaction number for your from address (bear in mind this starts off at 0 so a nonce of 100 would truly be the a hundred and first transaction https://echobookmarks.com/story20590567/the-blockchain-explorer-usdt-trc20-diaries-https-atavi-com-share-xftxdaz1pgsb4