Block top - The block selection and duration of the blockchain (in blocks) on creation of the present block Nonce - The transaction variety 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://sociallawy.com/story11083807/the-fact-about-explorer-blockchain-base-that-no-one-is-suggesting-https-graph-org-unveiling-transparency-how-blockchain-explorers-function-09-04