- new object, has address information as well as contract permission information.
- has a nonce now
- 'scripts' renamed appropriately to 'witnesses'
- has a 'cosigners' property.
- no longer has a nonce, nonce is now in ConsensusData for the block
timestamp
is now stored as a UInt64 as opposed to Uint32, in json it will be stored as a string now since UInt64 is a BN. commit