Block top - The block range and size from the blockchain (in blocks) on development of the current block Nonce - The transaction number for your from address (bear in mind this starts at 0 so a nonce of 100 would in fact be the a hundred and first transaction https://ariabookmarks.com/story6396398/detailed-notes-on-blockchain-explorer-unconfirmed-transaction-https-md-kif-rocks-qxb6ylbntwcjnvrpqnzeqw