Problem: Include evm_log_handlers errors in ethereum logs

[thomas-nguy]

The evm hook allows us to process logs from an ethereum transaction.

I would be nice that the details of the evm_log_handlers.go errors would also appear on eth logs or returned to the client so that he would be aware why the transaction fails

[tomtau]

I guess these details would go into DeliverTx fields such as "logs" that aren't a part of the consensus data, right?

[thomas-nguy]

yeah, having the error failure message in evm logs would mostly be beneficial for the indexer and web3 users since they are using the transaction receipt to check the result of their transactions.

for now, they only get a generic internal error message when the hook fails

[yihuang]

The "internal" error message has been fixed by this PR: evmos/ethermint#786.
In 0.7.0, the client should see "failed to execute post processing" if tx failed in hooks.