Add bitcoin testnet4

[wakiyamap]

It seems that testnet4 has been merged into bitcoin, so I will make a pull request to electrumx as well.
bitcoin/bitcoin#29775
cculianu/Fulcrum#255

[cculianu]

Hey I tried adding your server testnet4-electrumx.wakiyamap.dev as a peer but it is missing the 'hosts' key in the server.features map -- likely you turned peering off? Maybe turn it on so we can mingle?

[wakiyamap]

It seems I made a mistake in the settings.
Thanks. I was able to check the hosts.

$ echo '{"id": 1, "method": "server.features"}' | nc localhost 51001 -i 1
{"jsonrpc":"2.0","result":{"hosts":{"testnet4-electrumx.wakiyamap.dev":{"tcp_port":51001,"ssl_port":51002,"wss_port":51004}},"pruning":null,"server_version":"ElectrumX 1.16.0","protocol_min":"1.4","protocol_max":"1.4.3","genesis_hash":"00000000da84f2bafbbc53dee25a72ae507ff4914b867c565be350b0da8bf043","hash_function":"sha256","services":["tcp://testnet4-electrumx.wakiyamap.dev:51001","ssl://testnet4-electrumx.wakiyamap.dev:51002","wss://testnet4-electrumx.wakiyamap.dev:51004"]},"id":1}

[cculianu]

Yay! Our two servers are peered now! Thanks!

[SomberNight]

Thanks

[jmptbl]

@wakiyamap @SomberNight The testnet4 RPC port default changed from 18332 to 48332. Unfortunately this update missed that detail.

[SomberNight]

The testnet4 RPC port default changed from 18332 to 48332

Hmm, indeed looks like that:
https://github.com/bitcoin/bitcoin/blob/e8cc790fe2a223cfaa6dedfba88a6dc4f336f1d9/src/chainparamsbase.cpp#L45-L48

Could you open a new PR with that change?

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Anyway, note that you can specify the port manually in the DAEMON_URL env var:

electrumx/docs/environment.rst

Line 41 in 9258910

http://username:password@hostname:port/