Block top - The block selection and duration in the blockchain (in blocks) on development of the present block Nonce - The transaction selection with 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://getsocialsource.com/story6114002/explorer-blockchain-base-an-overview-https-www-multichain-com-qa-user-knotdrop3