Merge fort-nix/nix-bitcoin#504: Add fulcrum module

7d7f2df006 fulcrum: add module (Erik Arvstedt)
edd8bd311c bitcoind-rpc-public-whitelist: add `ping`, `help` (Erik Arvstedt)
f946a7cd9b examples: use `mkDefault` for setting `system.stateVersion` (Erik Arvstedt)
79994d0bd2 tests: increase postgresql startup timeout (Erik Arvstedt)

Pull request description:

ACKs for top commit:
  nixbitcoin:
    ACK 7d7f2df006

Tree-SHA512: 866f0a40bb81ceb2008e6efbd415eeee201b9e56aa5ebc60fd1bb4b6eda300155faaa2e6492d8145b3c6084b1e8ef5ec7d4e0ff694beb328d2e5ed755c9d04b4

test/lib/make-test.nix

@@ -79,7 +79,7 @@ name: testConfig:
        ''))
     ];
 
-    system.stateVersion = config.system.nixos.release;
+    system.stateVersion = lib.mkDefault config.system.nixos.release;
   })).config.system.build.vm;
 
   config = testConfig;

test/tests.nix

@@ -109,6 +109,9 @@ let
 
       tests.electrs = cfg.electrs.enable;
 
+      services.fulcrum.port = 50002;
+      tests.fulcrum = cfg.fulcrum.enable;
+
       tests.liquidd = cfg.liquidd.enable;
       services.liquidd.extraConfig = mkIf config.test.noConnections "connect=0";
 
@@ -141,7 +144,7 @@ let
       '';
 
       # Avoid timeout failures on slow CI nodes
-      systemd.services.postgresql.serviceConfig.TimeoutStartSec = "3min";
+      systemd.services.postgresql.serviceConfig.TimeoutStartSec = "5min";
     }
     (mkIf config.test.features.clightningPlugins {
       services.clightning.plugins = {
@@ -194,6 +197,7 @@ let
       services.lightning-pool.enable = true;
       services.charge-lnd.enable = true;
       services.electrs.enable = true;
+      services.fulcrum.enable = true;
       services.liquidd.enable = true;
       services.btcpayserver.enable = true;
       services.joinmarket.enable = true;
@@ -240,6 +244,7 @@ let
       services.lightning-pool.enable = true;
       services.charge-lnd.enable = true;
       services.electrs.enable = true;
+      services.fulcrum.enable = true;
       services.btcpayserver.enable = true;
       services.joinmarket.enable = true;
     };

test/tests.py

@@ -112,6 +112,11 @@ def _():
             log_has_string("electrs", "waiting for 0 blocks to download")
         )
 
+@test("fulcrum")
+def _():
+    assert_running("fulcrum")
+    machine.wait_until_succeeds(log_has_string("fulcrum", "started ok"))
+
 # Impure: Stops electrs
 # Stop electrs from spamming the test log with 'waiting for 0 blocks to download' messages
 @test("stop-electrs")
@@ -378,33 +383,44 @@ def _():
         else:
             return False
 
+    def get_block_height(ip, port):
+        return (
+            """echo '{"method": "blockchain.headers.subscribe", "id": 0}'"""
+            f" | nc {ip} {port} | head -1 | jq -M .result.height"
+        )
+
     num_blocks = test_data["num_blocks"]
 
     if enabled("electrs"):
         machine.wait_until_succeeds(log_has_string("electrs", "serving Electrum RPC"))
-        get_block_height_cmd = (
-            """echo '{"method": "blockchain.headers.subscribe", "id": 0, "params": []}'"""
-            f" | nc {ip('electrs')} 50001 | head -1 | jq -M .result.height"
-        )
-        assert_full_match(get_block_height_cmd, f"{num_blocks}\n")
+        assert_full_match(get_block_height(ip('electrs'), 50001), f"{num_blocks}\n")
+
+    if enabled("fulcrum"):
+        machine.wait_until_succeeds(log_has_string("fulcrum", "listening for connections"))
+        assert_full_match(get_block_height(ip('fulcrum'), 50002), f"{num_blocks}\n")
+
     if enabled("clightning"):
         machine.wait_until_succeeds(
             f"[[ $(runuser -u operator -- lightning-cli getinfo | jq -M .blockheight) == {num_blocks} ]]"
         )
+
     if enabled("lnd"):
         machine.wait_until_succeeds(
             f"[[ $(runuser -u operator -- lncli getinfo | jq -M .block_height) == {num_blocks} ]]"
         )
+
     if enabled("lightning-loop"):
         machine.wait_until_succeeds(
             log_has_string("lightning-loop", f"Starting event loop at height {num_blocks}")
         )
         succeed("runuser -u operator -- loop getparams")
+
     if enabled("lightning-pool"):
         machine.wait_until_succeeds(
             log_has_string("lightning-pool", "lnd is now fully synced to its chain backend")
         )
         succeed("runuser -u operator -- pool orders list")
+
     if enabled("btcpayserver"):
         machine.wait_until_succeeds(log_has_string("nbxplorer", f"At height: {num_blocks}"))