Startup error with bitcoin core 23.0

[waage]

INFO:2022-04-25 17:11:27,328: Synchronizing mempool . . .
Traceback (most recent call last):
  File "/home/norbert/.local/bin/electrum-personal-server", line 8, in <module>
    sys.exit(main())
  File "/home/norbert/.local/lib/python3.8/site-packages/electrumpersonalserver/server/common.py", line 494, in main
    run_electrum_server(rpc, txmonitor, config)
  File "/home/norbert/.local/lib/python3.8/site-packages/electrumpersonalserver/server/common.py", line 121, in run_electrum_server
    mempool_sync.initial_sync(logger)
  File "/home/norbert/.local/lib/python3.8/site-packages/electrumpersonalserver/server/mempoolhistogram.py", line 57, in initial_sync
    self.poll_update(-1)
  File "/home/norbert/.local/lib/python3.8/site-packages/electrumpersonalserver/server/mempoolhistogram.py", line 111, in poll_update
    fee_rate = 1e8*mempool_tx["fee"] // mempool_tx["vsize"]
KeyError: 'fee'

[mhooSec]

I get exactly the same error after upgrading Bitcoin Core to 23.0

[hMsats]

Same error

[hMsats]

I found a work around for now:

In /home/user/.local/lib/python3.8/site-packages/electrumpersonalserver/server/mempoolhistogram.py

I changed line 108:

mempool_tx = self.rpc.call("getmempoolentry", [txid])

into

mempool_tx = self.rpc.call("getmempoolentry -deprecatedrpc=fees", [txid])

and EPS was working again. This was changed in version 23 of Bitcoin Core

- - The top-level fee fields `fee`, `modifiedfee`, `ancestorfees` and `descendantfees`
  returned by RPCs `getmempoolentry`,`getrawmempool(verbose=true)`,
  `getmempoolancestors(verbose=true)` and `getmempooldescendants(verbose=true)`
  are deprecated and will be removed in the next major version (use
  `-deprecated=fees` if needed in this version).

[chris-belcher]

As well as what @hMsats wrote, you can also fix this by adding deprecatedrpc=fees to your bitcoin.conf file and then restarting Bitcoin Core.

The same kind of thing happened with this other issue: #247

[Liongrass]

Ah awesome, that config worked for me too

[hMsats]

I get the impression that my proposed solution above (changing line 108 in mempoolhistogram.py) increases the cpu usage of EPS considerably. It’s now often at the top of the Unix top command and also my measure of general cpu usage of my server has gone up a lot.

[andrewtoth]

@hMsats indeed it would. A better approach would be 008d9ac, which you can try until that patch gets merged.

[hMsats]

@andrewtoth Thanks a lot. EPS is working fine now, without the high cpu usage! I switched to adding deprecatedrpc=fees to bitcoin.conf but have removed that now. Electrum connected only to my EPS server is also working.