Storehouse M4: Network-Wide Storehouse Enablement

[zhangchiqing]

Goal

• All ENs will be running storehouse. Since no EN is running mTrie, the network can support a larger execution state. In other words, mTrie EN can be deprecated.
• Storehouse EN is able to support sporks (Currently sporks require mTrie EN).

Implementation Details

1. Storehouse ENs can generate root checkpoints by reconstructing payloads into the payloadless trie using data from the on-disk register store.
2. WALs (write-ahead logs) for the trie are persisted to disk only after blocks are sealed.
3. Checkpoints contain a single trie whose root hash is finalized (sealed).

[github-actions]

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