Hsiao-Wei Wang 40483b587b
[squashed] shard chain updates wip
Use `ShardBlock` in `shard_state_transition`

PR feedback

1. Rename `ShardState.data` -> `ShardState.transition_digest`
2. Rename `compute_shard_transition_data` to `compute_shard_transition_digest`
3. Add `assert state.slot > PHASE_1_GENESIS_SLOT` just in case, may move it later

Add `get_post_shard_state` as a pure function wrapper
2020-05-02 02:32:24 +08:00
..
2020-05-02 02:32:24 +08:00