Add state to sync extension#1855

Merged

remagpie merged 3 commits intoCodeChain-io:feature/snapshotfrom

remagpie:sync-state-transition

Nov 14, 2019

Commits on Nov 6, 2019

Add configuration option for the snapshot sync target
remagpie
committed

Commits on Nov 11, 2019

Decide the sync extension's state with the snapshot target
remagpie
committed

Commits on Nov 14, 2019

Implement TrieDB::is_complete
remagpie
committed