Beware updating Electrs if not bought into SHA256 Chain

Discussion
1

If you upgrade Electrs now to 0.12 it only supports Core 31.. you can’t Downgrade and sideload downgrade doesn’t appear to work - so you will be left with little choice but to move to Fulcrum and commence index from beginning.. Would have been nice to know what this was a breaking change to knots dependency; but there you go.:face_with_diagonal_mouth:

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3

This is why you should read the release notes, before you do an update, especially in the situation with the chain split.

4

I’m not sure this is the expected behavior. I’d like to learn more about your pre-updata setup. What flavor and version of Bitcoin, and what version of Electrs were you on, before updating Electrs to 0.12?

Update: This is known behavior. Matt is going to strengthen the release notes about this, and make it so a downgrade is possible. For people who have already updated, if they want to stick with electrs they will need to uninstall, then reinstall at v11. Then never update to v12. I know this doesn’t solve your specific case. I’m sorry. But for future updaters, they will be able to downgrade back to v11, without re-indexing.

In your case, since you’ll need to re-index anyway I’d recommend switching to Fulcrum.

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5

hindsight is 20/20, Breaking Changes are not accidental. There is plenty of incentive out their to squash any challenge to Bitcoin’s capture.

6

Same here. Only noticed after I had already upgraded and I wasn’t able to downgrade either. I had to uninstall and reinstall vers 1.1 and wait for the reindex to finish before mempool would work. So, I’ve always used electrs, is fulcrum a better choice now and why?

Thanks.

7

Fulcrum is a better and faster indexer, especially for wallets that may have a long history. The only down side, it takes a little longer on the initial sync, and consumes more drive space. I’ve noticed a significant increase in wallet performance since switching to Fulcrum.

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8

I think it has more to do with a specific feature in 31, that helps Electrs be a better indexer. I don’t think there is any reason a future version of Knots, or Knots Legacy cannot include the REST API in their implementation.

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