Block top - The block selection and length from the blockchain (in blocks) on creation of the current block Nonce - The transaction number for your from address (bear in mind this begins at 0 so a nonce of one hundred would essentially be the one hundred and first transaction https://businessbookmark.com/story5737852/a-review-of-blockchain-explorer-usdt-https-hedgedoc-k8s-eonerc-rwth-aachen-de-0szjqhm8rceyuj2fq5ha9g