One entry per action in the receipt (V4+ only): the contract attached
to the receiver account immediately before that action ran. The inner
Option is Some (a tagged contract object) when the account had a
contract and None (rendered as JSON null) when it did not (e.g. an
account with no code, or one that did not yet exist). The outer
Option is None for older metadata versions.
One entry per action in the receipt (V4+ only): the contract attached to the receiver account immediately before that action ran. The inner
OptionisSome(a tagged contract object) when the account had a contract andNone(rendered as JSONnull) when it did not (e.g. an account with no code, or one that did not yet exist). The outerOptionisNonefor older metadata versions.