feat: update readmes and keys and fixes

.gitignore

@@ -1 +1,2 @@
 remote/target
+.direnv

pi/.envrc

@@ -0,0 +1 @@
+use flake

pi/README.md

@@ -16,6 +16,14 @@ On startup it also syncs the initial state.
 
 ## Setup
 
+### Prerequisites
+
+If you're building on an x86_64 machine, you need binfmt emulation for aarch64. On NixOS, add this to your system config and rebuild:
+
+```nix
+boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
+```
+
 ### 1. Flash the SD card
 
 ```sh
@@ -23,14 +31,12 @@ nix build .#nixosConfigurations.bootstrap.config.system.build.sdImage
 dd if=result/sd-image/*.img of=/dev/sdX bs=4M status=progress
 ```
 
-Boot the Pi. It connects to the Noisebridge WiFi automatically.
+Boot the Pi. It connects to the Noisebridge WiFi automatically and is discoverable via mDNS as `noisebridge-pi.local`.
 
 ### 2. Find the Pi
 
 ```sh
-nmap -sn 192.168.1.0/24
-# or
-arp -a
+ping noisebridge-pi.local
 ```
 
 ### 3. SSH host key
@@ -38,7 +44,7 @@ arp -a
 Grab the key and add it to `secrets/secrets.nix`:
 
 ```sh
-ssh-keyscan <pi-ip> | grep ed25519
+ssh-keyscan noisebridge-pi.local 2>/dev/null | grep ed25519
 ```
 
 ```nix

pi/bootstrap.nix

@@ -5,7 +5,7 @@
 
   hardware.enableRedistributableFirmware = true;
 
-  networking.hostName = "noisebell";
+  networking.hostName = "noisebridge-pi";
 
   networking.wireless = {
     enable = true;
@@ -16,6 +16,15 @@
     };
   };
 
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    publish = {
+      enable = true;
+      addresses = true;
+    };
+  };
+
   services.openssh.enable = true;
   users.users.root.openssh.authorizedKeys.keys = [
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE40ISu3ydCqfdpb26JYD5cIN0Fu0id/FDS+xjB5zpqu"

pi/configuration.nix

@@ -3,13 +3,33 @@
 {
   system.stateVersion = "24.11";
 
-  networking.hostName = "noisebell";
+  networking.hostName = "noisebridge-pi";
+
+  networking.wireless = {
+    enable = true;
+    networks."Noisebridge".psk = "noisebridge";
+  };
+
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    publish = {
+      enable = true;
+      addresses = true;
+    };
+  };
 
   # Decrypted at runtime by agenix
   age.secrets.tailscale-auth-key.file = ./secrets/tailscale-auth-key.age;
 
-  age.secrets.api-key.file = ./secrets/api-key.age;
-  age.secrets.inbound-api-key.file = ./secrets/inbound-api-key.age;
+  age.secrets.api-key = {
+    file = ./secrets/api-key.age;
+    owner = "noisebell";
+  };
+  age.secrets.inbound-api-key = {
+    file = ./secrets/inbound-api-key.age;
+    owner = "noisebell";
+  };
 
   services.noisebell = {
     enable = true;
@@ -34,5 +54,6 @@
   };
 
   users.users.root.openssh.authorizedKeys.keys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE40ISu3ydCqfdpb26JYD5cIN0Fu0id/FDS+xjB5zpqu"
   ];
 }

pi/flake.nix

@@ -180,5 +180,11 @@
         system = "aarch64-linux";
         modules = [ ./bootstrap.nix ];
       };
+
+      devShells.x86_64-linux.default = let
+        pkgs = nixpkgs.legacyPackages.x86_64-linux;
+      in pkgs.mkShell {
+        packages = [ agenix.packages.x86_64-linux.default ];
+      };
     };
 }

pi/pi-service/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 anyhow = "1.0"
 axum = "0.8"
 libc = "0.2"
-reqwest = { version = "0.12", features = ["json"] }
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
 rppal = "0.22"
 sd-notify = "0.4"
 serde = { version = "1.0", features = ["derive"] }

pi/pi-service/flake.lock

@@ -0,0 +1,64 @@
+{
+  "nodes": {
+    "crane": {
+      "locked": {
+        "lastModified": 1773189535,
+        "narHash": "sha256-E1G/Or6MWeP+L6mpQ0iTFLpzSzlpGrITfU2220Gq47g=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "6fa2fb4cf4a89ba49fc9dd5a3eb6cde99d388269",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1773646010,
+        "narHash": "sha256-iYrs97hS7p5u4lQzuNWzuALGIOdkPXvjz7bviiBjUu8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "5b2c2d84341b2afb5647081c1386a80d7a8d8605",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "crane": "crane",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1773716879,
+        "narHash": "sha256-vXCTasEzzTTd0ZGEuyle20H2hjRom66JeNr7i2ktHD0=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "1a9ddeb45c5751b800331363703641b84d1f41f0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pi/pi-service/flake.nix

@@ -42,6 +42,9 @@
             CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER =
               "${crossPkgs.stdenv.cc.targetPrefix}cc";
 
+            TARGET_CC = "${crossPkgs.stdenv.cc.targetPrefix}cc";
+            CC_aarch64_unknown_linux_gnu = "${crossPkgs.stdenv.cc.targetPrefix}cc";
+
             HOST_CC = "${pkgs.stdenv.cc.nativePrefix}cc";
 
             depsBuildBuild = [ crossPkgs.stdenv.cc ];

pi/pi-service/src/main.rs

@@ -264,7 +264,7 @@ async fn main() -> Result<()> {
     // pin must live for the entire program — rppal runs interrupts on a background
     // thread tied to the InputPin. If pin drops, the interrupt thread is joined and
     // monitoring stops. We move it into a binding that lives until main() returns.
-    let _pin = pin;
+    let mut _pin = pin;
     _pin.set_async_interrupt(
         Trigger::Both,
         Some(Duration::from_secs(debounce_secs)),

pi/result

@@ -0,0 +1 @@
+/nix/store/pmrzmz2b2hsffk62icl3c0ni56gpi3qs-nixos-image-sd-card-26.05.20260308.9dcb002-aarch64-linux.img.zst

pi/secrets/api-key.age

@@ -0,0 +1,7 @@
+age-encryption.org/v1
+-> ssh-ed25519 Ziw7aw KeT7ZRx4LnoXw4TzbqAZ6U4tc74XdTGOoFvF3p1cwwc
+FMlEdlMjMGfMJByOBYaY2m0Zr6eGOVm/wYCBkUMUUmg
+-> ssh-ed25519 jcT/MQ A0b/6ZhKbqAk8Wx/jCcZsPSygXDyll+f6v8GmM3v1T8
+BE4MTRbbXBFGVYFpKdbD8EzYSLCZxxo3UX9hxrlX9N8
+--- rsyZbWLKxYWHT71Yg0nVryroF8QCjmVvGsYidVM2LP0
+lh^²õM5£<35>Ê<>'¡<>QO¤¼'Ûs­xœUë§å¥[[‰Ðf1¦Ï1Nô"¡KEò—ð„ÿ
	߬Ëçbb*FÐÉhPõu»¯sáÀ

pi/secrets/inbound-api-key.age

@@ -0,0 +1,7 @@
+age-encryption.org/v1
+-> ssh-ed25519 Ziw7aw Gykk5VLi/S/Lbf0YDFG7rax5WCIwjmfJMpe9r8XK4T0
+nbggjY+m082BdKzUYucVFrwu08ziQtnY3BMXQ2dwMJo
+-> ssh-ed25519 jcT/MQ OmtLLN7acSjwZrbYpc8eCOfgw1ZelHk2OWusj3kukyM
+DoW2NvsOBLHhfa7NYEZP92nm1fAY7gYjM+/WHIPLD88
+--- HuvJEBrp5h5PXzlruLVL9pIKmlu8VBK17spsb/gco2E
+`%ñ(OÐÜtãN‘ÝAß^ؽÞz¿ô	Ü%i'cÖGKý3v0bZ0߇ПŒ Ü\ŒÙ”¸2gIV†+9˲¦Í1ÅA¢T.V‡MöZ

pi/secrets/secrets.nix

@@ -1,8 +1,9 @@
 let
-  pi = "ssh-ed25519 AAAA..."; # Pi's SSH host public key
+  jet = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE40ISu3ydCqfdpb26JYD5cIN0Fu0id/FDS+xjB5zpqu";
+  pi = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKmJFZAVJUjDziQ7XytVhQIv+Pm9hnbVU0flxZK17K5E";
 in
 {
-  "api-key.age".publicKeys = [ pi ];
-  "inbound-api-key.age".publicKeys = [ pi ];
-  "tailscale-auth-key.age".publicKeys = [ pi ];
+  "api-key.age".publicKeys = [ jet pi ];
+  "inbound-api-key.age".publicKeys = [ jet pi ];
+  "tailscale-auth-key.age".publicKeys = [ jet pi ];
 }

pi/secrets/tailscale-auth-key.age

@@ -0,0 +1,7 @@
+age-encryption.org/v1
+-> ssh-ed25519 Ziw7aw VR4dTYsFGIL0wGdikj1l034Uxg+C06qn9xwNrDfrYGg
+FSp36eUOslycLme0hQalv/6oS6tQmJbXbIZ9ezaCznc
+-> ssh-ed25519 jcT/MQ 65epjpYA8RNKGxgyEbASm7aZaAdaj88FH2D3/yWHXH0
+rUhjanumw1mr/YkpMYfVamegTKNMXkQS/CifOTvQHAA
+--- nyitQGsf/UyVmRaqMXOBXYRhbeViymeHhCWZkKqtfNo
+xîÖè!ñ¯¡¿áf#ÙŒCZGßÔíByÆ%©èA<C3A8>·µ/ç~}õJA¬(’„³™‡ru¬Lþ•“gðDy§Â2RÑà®vû<76>‹€%¼ePÈÕ(ÀqŽ»ÛÃÔ