Wallets that use Electrum as their block source face greater difficulty acting as a Payjoin receiver.

[arminsabouri]

We rightfully guide applications to use testmempoolaccept at the check_broadcast_suitability typestate check. For reasons unknown to me electrum implementations do not support a testmempoolaccept equivalent. It should be relatively easy to support this method as most implementations end up using bitcoind's JSON rpc interface.

For example it took me 10 min to add and test support for electrs. romanz/electrs@master...arminsabouri:electrs:test-mempool-accept .

[DanGould]

Yes this one goes way back