Block top - The block selection and duration of the blockchain (in blocks) on creation of the current block Nonce - The transaction range with the from address (Remember this starts off at 0 so a nonce of 100 would actually be the 101st transaction submitted by this account) Contract https://socialmediastore.net/story21505023/the-2-minute-rule-for-blockchain-explorer-solana-https-www-mixcloud-com-brokerfridge5