Just registered to say, I was looking for the same thing today. Can’t most of the code be lifted from Litecoin/Dogecoin? I might look into it if I get board.

I added those 4 servers to my electrumx peer list, so it should broadcast my server to them now as well.

Oh I also determined why I could only connect to my server and the electrumx-1.neoscrypt.de server and that’s because they are the only ones with a valid SSL cert (issued from a trusted CA). Mine comes from LetsEncrypt. I could not connect on non-SSL ports to any server as it always wanted to use SSL. I’m not sure why it’s trying to force SSL or how to turn it off to check the other servers. If you want to check your wallet against my server, it’s electrum-ftc.leblancnet.us:50024.

Okay, some progress here. I tried cloning your repo and using the 3.3.8.0 from it with the same results. I tried using the current_release branch for the 4.1.5 and I could not init the submodules.

rleblanc@2927-laptop:~/coins/electrum-ftc-wellenreiter$ git submodule update --init
fatal: No url found for submodule path 'contrib/NeoScrypt' in .gitmodules
rleblanc@2927-laptop:~/coins/electrum-ftc-wellenreiter$ cat .gitmodules 
[submodule "contrib/deterministic-build/electrum-locale"]
        path = contrib/deterministic-build/electrum-locale
        url = https://github.com/spesmilo/electrum-locale
[submodule "electrum/www"]
        path = electrum/www
        url = https://github.com/spesmilo/electrum-http.git
[submodule "electrum/gui/kivy/theming/atlas"]
        path = electrum/gui/kivy/theming/atlas
        url = https://github.com/spesmilo/electrum-kivy-atlas

So, I downloaded the release tarball that you linked and got those dependencies installed. When I first ran it it was connecting to bitcoin but it allowed me to connect to my FTC electrumX server just fine and electrumx-1.neoscrypt.de, so I changed out the checkpoints.json in the code directory like you mentioned and it seems to get stuck on downloading the blockchain headers.

I/i | interface.[electrum.dcn.io:50002] | requesting block header 0 in mode backward
D/i | interface.[electrum.dcn.io:50002] | <-- ('blockchain.block.header', [0]) {} (id: 343)
D/i | interface.[electrum.dcn.io:50002] | --> 0100000000000000000000000000000000000000000000000000000000000000000000003ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a29ab5f49ffff001d1dac2b7c (id: 343)
I/i | interface.[electrum.dcn.io:50002] | requesting block header 0 in mode backward
D/i | interface.[electrum.dcn.io:50002] | <-- ('blockchain.block.header', [0]) {} (id: 344)
D/i | interface.[electrum.dcn.io:50002] | --> 0100000000000000000000000000000000000000000000000000000000000000000000003ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a29ab5f49ffff001d1dac2b7c (id: 344)
I/i | interface.[electrum.dcn.io:50002] | requesting block header 0 in mode backward
D/i | interface.[electrum.dcn.io:50002] | <-- ('blockchain.block.header', [0]) {} (id: 345)

So, I found a program that will build a checkpoint.json based on the full node (https://github.com/romanornr/checkpoints-electrum) and pointed it to my FTC Core and it built a file. When I use that, it then can sync to block 4015871 (currently electrumX is showing a height of 4016486) and there is a new error in the client.

...
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', 'count': 2016, 'max': 2016} (id: 476)
I | blockchain.Blockchain | verify_chunk idx 1629 failed: ValueError('too many values to unpack (expected 2)')
D/i | interface.[electrumx-1.neoscrypt.de:50002] | --> 00000020132f9ee4dc2aac0e87d6db64743fd08930218b87a987ffd157bd0cae69cc0c85b8fb4decdd29378999c637415cc3fc80cf33526cbfb55e42bb7ec9ddd5390078d8f0eb614ad6111c2d46cab9 (id: 477)
I/i | interface.[electrumx-1.neoscrypt.de:50002] | requesting block header 4015871 in mode backward
D/i | interface.[electrumx-1.neoscrypt.de:50002] | <-- ('blockchain.block.header', [4015871]) {} (id: 478)
I/i | interface.[electrumx-1.neoscrypt.de:50002] | requesting chunk from height 3284862
D/i | interface.[electrumx-1.neoscrypt.de:50002] | <-- ('blockchain.block.headers', [3284064, 2016]) {} (id: 479)
D/i | interface.[electrumx-1.neoscrypt.de:50002] | --> 00000020132f9ee4dc2aac0e87d6db64743fd08930218b87a987ffd157bd0cae69cc0c85b8fb4decdd29378999c637415cc3fc80cf33526cbfb55e42bb7ec9ddd5390078d8f0eb614ad6111c2d46cab9 (id: 478)
I/i | interface.[electrumx-1.neoscrypt.de:50002] | requesting block header 4015871 in mode backward
D/i | interface.[electrumx-1.neoscrypt.de:50002] | <-- ('blockchain.block.header', [4015871]) {} (id: 480)
^CD/i | interface.[electrumx-1.neoscrypt.de:50002] | --> {'hex': '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
...

The transaction that I have in my wallet shows Not verified even though it was included in block 3284862. You can see the electrum wallet asking for this block in the messages above.

On another note, it was putting all the cache and things in ~/.electrum/ instead of ~/.electrum-ftc like versions past, but I suspect that you are still updating things. I hope this helps some.

I got my wallet from:

$ git remote -v
origin  https://github.com/Feathercoin-Foundation/electrum-ftc.git (fetch)
origin  https://github.com/Feathercoin-Foundation/electrum-ftc.git (push)

I’ve cleared out everything in ~/.local/cache/electrum-ftc/ except for config, recent_servers (to keep the “good” servers), and wallets many times and it keeps getting stuck on that same block. I’ve tried creating new wallets (Segwit and non-segwit) without any improvement. I’m just so confused by this. Part of me really doesn’t want to give up on it because I really like Electrum. I guess I can try the 4.1.5 version of the wallet, probably won’t be able to get to it until the weekend.

Are you saying that my server version should work? Is that the same version that you are using?

I’m already running 3.3.8 wallet.

Out of the list of servers that you specified, they all resolve in DNS, but I can only connect to electrumx-1.neoscrypt.de and I still get the block error from the first post. Unless the other servers are running on a port other than 50002, I can’t connect to them.

electrumx-2.feathercoin.com does not ping, however all four servers are reporting 50002 open by nmap, so I’m not sure why my wallet won’t connect to them.

electumx-2.feathercoin.com/50002 does not appear to want to connect for me. The name won’t resolve.

; <<>> DiG 9.16.22-Debian <<>> electumx-2.feathercoin.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 34225
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;electumx-2.feathercoin.com.    IN      A

;; AUTHORITY SECTION:
feathercoin.com.        7       IN      SOA     ian.ns.cloudflare.com. dns.cloudflare.com. 2038111533 10000 2400 604800 3600

;; Query time: 32 msec
;; SERVER: 10.65.4.26#53(10.65.4.26)
;; WHEN: Tue Jan 18 07:22:44 MST 2022
;; MSG SIZE  rcvd: 113

My electrum server is still on 1.15.0 (altcoin branch) from Neil Booth, I haven’t moved over to the fork yet.

I’ve been trying to get Electrum wallet working. I saw the post about the upgrade and I’m using client 3.3.8.0 now with the same issue. On my ElectrumX server, I’ve deleted the database and had it reindex from the Core, and weather I use my server or electrumx-1.neoscript.de/50002 it gets stuck on the same block. I’ve removed everything except wallet at ~/.local/share/electrum-ftc/ with no luck. The error that I’m getting is:

Exception: unexpected bad header during binary: {'version': 536870912, 'prev_block_hash': '42dcee0afe0fcc0ebaa0e7f800ec0d0d55ae6a26625e547b222213e93eeb0c4f', 'merkle_root': '3d286adf34b21d14e3b26f6ba335cb1931b3f237ab838b08b74206e312efb2da', 'timestamp': 1523789388, 'bits': 469852709, 'nonce': 338705409, 'block_height': 2165184}
E/i | interface.[electrumx-1.neoscrypt.de:50002] | Exception in wrapper_func: Exception("unexpected bad header during binary: {'version': 536870912, 'prev_block_hash': '42dcee0afe0fcc0ebaa0e7f800ec0d0d55ae6a26625e547b222213e93eeb0c4f', 'merkle_root': '3d286adf34b21d14e3b26f6ba335cb1931b3f237ab838b08b74206e312efb2da', 'timestamp': 1523789388, 'bits': 469852709, 'nonce': 338705409, 'block_height': 2165184}")

It would be nice to get ElectrumX up and running again, but at this point I’m almost to the point to import my key back into Core. What ElectrumX server should I be running and where would I get it?

Thank you!

Just registered to say, I was looking for the same thing today. Can’t most of the code be lifted from Litecoin/Dogecoin? I might look into it if I get board.