Block top - The block selection and length from the blockchain (in blocks) on creation of the present block Nonce - The transaction number for 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://thebookmarknight.com/story20810792/not-known-facts-about-blockchain-explorer-unconfirmed-transaction-https-kearns-horn-hubstack-net-monitoring-transfers-how-distributed-ledger-analyzers-work