Request and Import AEV from other nodes when InvalidBlockStateRootHashException occurs

[area363]

When InvalidBlockStateRootHashException occurs when executing a block, the node cannot move past that block.

In this case, the general way to fix this issue is to:

1. Download a new snapshot where the tip is greater than the problematic block.
2. Manually fix Li9c action codes and resolve InvalidBlockStateRootHashException.

Unfortunately, both methods take a long time to execute.

Would it be possible to request AEV from other nodes and use that as the block evaluation result and move on to the next block?

[area363]

Related Issue: planetarium/lib9c#1237

[moreal]

How about providing all evaluations of the block through InvalidBlockStateRootHashException? They may be too big but useful to debug.

[moreal]

In the Ethereum implementation, it called TxExecution (a.k.a txResult) as Receipt. It represents the transaction's execution result and it contains the intermediate state root hash. I think the feature will be useful if provided.

ref:

• https://cs.github.com/ethereum/go-ethereum/blob/3b2a6b34d92b84f6bfab058a46d9fc73c21365c7/core/state_processor.go#L95
• https://cs.github.com/ethereum/go-ethereum/blob/3b2a6b34d92b84f6bfab058a46d9fc73c21365c7/core/state/statedb.go#L826

To achieve it, it should apply transaction one by one instead of GetTotalDelta.