We were (dumbly?) using the `onchain_hrp` for 'chain_mvts' and the
`lightning_hrp` for 'channel_mvts'.
This works fine everywhere *except* for on a signet, where we use
different prefixes.
Since the lightning-hrp set is more diversified (testnet btc
+ signet btc use the same HRP 'onchain'), let's use that.
Should have zero impact on anything other than nodes running on signet.
To preserve your current accounts database without needing to delete,
restart, execute the following: (note preferrably when your node isn't
running).
```
UPDATE chain_events SET currency = 'tbs' WHERE currency = 'tb';
```
Fixes#6534
Changelog-Fixed: `bkpr-listbalances` would crash for nodes on signet with payments in channels, because onchain events were using a different currency than inchannel events.
df71f2ffa0