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-name = "windows-targets"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
-dependencies = [
- "windows_aarch64_gnullvm 0.48.5",
- "windows_aarch64_msvc 0.48.5",
- "windows_i686_gnu 0.48.5",
- "windows_i686_msvc 0.48.5",
- "windows_x86_64_gnu 0.48.5",
- "windows_x86_64_gnullvm 0.48.5",
- "windows_x86_64_msvc 0.48.5",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
-dependencies = [
- "windows_aarch64_gnullvm 0.52.6",
- "windows_aarch64_msvc 0.52.6",
- "windows_i686_gnu 0.52.6",
- "windows_i686_gnullvm",
- "windows_i686_msvc 0.52.6",
- "windows_x86_64_gnu 0.52.6",
- "windows_x86_64_gnullvm 0.52.6",
- "windows_x86_64_msvc 0.52.6",
-]
-
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
-
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
-
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
-
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
-
-[[package]]
-name = "windows_i686_gnu"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
-
-[[package]]
-name = "windows_i686_gnu"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
-
-[[package]]
-name = "windows_i686_gnullvm"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
-
-[[package]]
-name = "windows_i686_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
-
-[[package]]
-name = "windows_i686_msvc"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
-
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
-
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
-
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
-
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
-
-[[package]]
-name = "winreg"
-version = "0.50.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "524e57b2c537c0f9b1e69f1965311ec12182b4122e45035b1508cd24d2adadb1"
-dependencies = [
- "cfg-if",
- "windows-sys 0.48.0",
-]
-
-[[package]]
-name = "wit-bindgen-rt"
-version = "0.39.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
-dependencies = [
- "bitflags 2.9.0",
-]
-
-[[package]]
-name = "write16"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1890f4022759daae28ed4fe62859b1236caebfc61ede2f63ed4e695f3f6d936"
-
-[[package]]
-name = "writeable"
-version = "0.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e9df38ee2d2c3c5948ea468a8406ff0db0b29ae1ffde1bcf20ef305bcc95c51"
-
-[[package]]
-name = "yoke"
-version = "0.7.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "120e6aef9aa629e3d4f52dc8cc43a015c7724194c97dfaf45180d2daf2b77f40"
-dependencies = [
- "serde",
- "stable_deref_trait",
- "yoke-derive",
- "zerofrom",
-]
-
-[[package]]
-name = "yoke-derive"
-version = "0.7.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2380878cad4ac9aac1e2435f3eb4020e8374b5f13c296cb75b4620ff8e229154"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "synstructure",
-]
-
-[[package]]
-name = "zerofrom"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
-dependencies = [
- "zerofrom-derive",
-]
-
-[[package]]
-name = "zerofrom-derive"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "synstructure",
-]
-
-[[package]]
-name = "zerovec"
-version = "0.10.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa2b893d79df23bfb12d5461018d408ea19dfafe76c2c7ef6d4eba614f8ff079"
-dependencies = [
- "yoke",
- "zerofrom",
- "zerovec-derive",
-]
-
-[[package]]
-name = "zerovec-derive"
-version = "0.10.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6eafa6dfb17584ea3e2bd6e76e0cc15ad7af12b09abdd1ca55961bed9b1063c6"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
diff --git a/flake.lock b/flake.lock
index 200c378..4b258a6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,20 +1,5 @@
 {
   "nodes": {
-    "crane": {
-      "locked": {
-        "lastModified": 1742394900,
-        "narHash": "sha256-vVOAp9ahvnU+fQoKd4SEXB2JG2wbENkpqcwlkIXgUC0=",
-        "owner": "ipetkov",
-        "repo": "crane",
-        "rev": "70947c1908108c0c551ddfd73d4f750ff2ea67cd",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ipetkov",
-        "repo": "crane",
-        "type": "github"
-      }
-    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -35,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1742751704,
-        "narHash": "sha256-rBfc+H1dDBUQ2mgVITMGBPI1PGuCznf9rcWX/XIULyE=",
+        "lastModified": 1742268799,
+        "narHash": "sha256-IhnK4LhkBlf14/F8THvUy3xi/TxSQkp9hikfDZRD4Ic=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f0946fa5f1fb876a9dc2e1850d9d3a4e3f914092",
+        "rev": "da044451c6a70518db5b730fe277b70f494188f1",
         "type": "github"
       },
       "original": {
@@ -67,7 +52,6 @@
     },
     "root": {
       "inputs": {
-        "crane": "crane",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
         "rust-overlay": "rust-overlay"
@@ -78,11 +62,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1742783666,
-        "narHash": "sha256-IwdSl51NL6V0f+mYXZR0UTKaGleOsk9zV3l6kt5SUWw=",
+        "lastModified": 1742437918,
+        "narHash": "sha256-Vflb6KJVDikFcM9E231mRN88uk4+jo7BWtaaQMifthI=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "60766d63c227d576510ecfb5edd3a687d56f6bc7",
+        "rev": "f03085549609e49c7bcbbee86a1949057d087199",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 07aa02c..d774b81 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,105 +3,41 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
     flake-utils.url = "github:numtide/flake-utils";
     rust-overlay.url = "github:oxalica/rust-overlay";
-    crane.url = "github:ipetkov/crane";
   };
-  outputs =
-    {
-      self,
-      nixpkgs,
-      flake-utils,
-      rust-overlay,
-      crane,
-    }:
-    flake-utils.lib.eachDefaultSystem (
-      system:
-      let
-        overlays = [
-          rust-overlay.overlays.default
-        ];
-        pkgs = import nixpkgs {
-          inherit system overlays;
-          config = {
-            allowUnfree = true;
-          };
-        };
-
-        # Import rust setup
-        rustSetup = import ./nix/rust-setup.nix { inherit pkgs crane; };
-        inherit (rustSetup) rustVersion rustPlatform craneLib;
-
-        src = craneLib.cleanCargoSource ./.;
-
-        commonArgs = {
-          inherit src;
-
-          # Add any build inputs needed
-          buildInputs = with pkgs; [
-            openssl
-            pkg-config
+  outputs = { self, nixpkgs, flake-utils, rust-overlay }:
+    flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          overlays = [
+            rust-overlay.overlays.default
           ];
-
-          # Add any native build inputs
-          nativeBuildInputs = with pkgs; [
-            rustPlatform.bindgenHook
-            pkg-config
-          ];
-
-          checkType = "debug";
-          env = {
-            OPENSSL_NO_VENDOR = "1";
-            NIX_OUTPATH_USED_AS_RANDOM_SEED = "aaaaaaaaaa";
+          pkgs = import nixpkgs {
+            inherit system overlays;
+            config = {
+              allowUnfree = true;
+            };
           };
-        };
+        in
+        with pkgs;
+        {
+          devShells.default = mkShell {
+            env = {
+              OPENSSL_NO_VENDOR = "1";
+              NIX_OUTPATH_USED_AS_RANDOM_SEED = "aaaaaaaaaa";
+            };
 
-        cargoArtifacts = craneLib.buildDepsOnly commonArgs;
-        individualCrateArgs = commonArgs // {
-          inherit cargoArtifacts;
-          inherit (craneLib.crateNameFromCargoToml { inherit src; }) version;
-          # NB: we disable tests since we'll run them all via cargo-nextest
-          doCheck = false;
-        };
-
-        # Import vault-hier package
-        vault-hier = import ./nix/packages/vault-hier.nix {
-          inherit
-            pkgs
-            craneLib
-            individualCrateArgs
-            ;
-        };
-
-        # Import devshell
-        devshell_with_src = import ./nix/devshell.nix {
-          inherit pkgs vault-hier rustVersion;
-        };
-      in
-      {
-        # Import checks
-        checks = import ./nix/checks {
-          inherit
-            craneLib
-            src
-            commonArgs
-            cargoArtifacts
-            vault-hier
-            pkgs
-            ;
-        };
-
-        # Add packages output
-        packages = {
-          inherit vault-hier;
-          default = vault-hier;
-        };
-
-        devShells = {
-          inherit devshell_with_src;
-          default = devshell_with_src;
-        };
-
-        # Add formatter for `nix fmt`
-        formatter = pkgs.nixfmt-rfc-style;
-      }
-    );
+            packages = [
+              pkg-config
+              vault
+              (rust-bin.stable.latest.default.override {
+                extensions = [ "rust-src" ];
+              })
+              rustc
+              cargo
+              rustfmt
+              clippy
+            ];
+          };
+        }
+      );
 }
diff --git a/nix/checks/clippy.nix b/nix/checks/clippy.nix
deleted file mode 100644
index 7a5bc32..0000000
--- a/nix/checks/clippy.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-  craneLib,
-  commonArgs,
-  cargoArtifacts,
-}:
-
-craneLib.cargoClippy (
-  commonArgs
-  // {
-    inherit cargoArtifacts;
-    cargoClippyExtraArgs = "--all-targets -- --deny warnings";
-  }
-)
diff --git a/nix/checks/default.nix b/nix/checks/default.nix
deleted file mode 100644
index dd9c5f9..0000000
--- a/nix/checks/default.nix
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  craneLib,
-  src,
-  commonArgs,
-  cargoArtifacts,
-  vault-hier,
-  pkgs,
-}:
-
-{
-  inherit vault-hier;
-
-  my-workspace-clippy = import ./clippy.nix {
-    inherit craneLib commonArgs cargoArtifacts;
-  };
-
-  my-workspace-doc = import ./doc.nix {
-    inherit craneLib commonArgs cargoArtifacts;
-  };
-
-  # Check formatting
-  my-workspace-fmt = import ./fmt.nix {
-    inherit craneLib src;
-  };
-
-  my-workspace-toml-fmt = import ./toml-fmt.nix {
-    inherit craneLib src;
-    lib = pkgs.lib;
-  };
-}
diff --git a/nix/checks/doc.nix b/nix/checks/doc.nix
deleted file mode 100644
index 7afd451..0000000
--- a/nix/checks/doc.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  craneLib,
-  commonArgs,
-  cargoArtifacts,
-}:
-
-craneLib.cargoDoc (
-  commonArgs
-  // {
-    inherit cargoArtifacts;
-  }
-)
diff --git a/nix/checks/fmt.nix b/nix/checks/fmt.nix
deleted file mode 100644
index b4db42d..0000000
--- a/nix/checks/fmt.nix
+++ /dev/null
@@ -1,5 +0,0 @@
-{ craneLib, src }:
-
-craneLib.cargoFmt {
-  inherit src;
-}
diff --git a/nix/checks/toml-fmt.nix b/nix/checks/toml-fmt.nix
deleted file mode 100644
index 410fcd8..0000000
--- a/nix/checks/toml-fmt.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-  craneLib,
-  src,
-  lib,
-}:
-
-craneLib.taploFmt {
-  src = lib.sources.sourceFilesBySuffices src [ ".toml" ];
-  # taplo arguments can be further customized below as needed
-  # taploExtraArgs = "--config ./taplo.toml";
-}
diff --git a/nix/devshell.nix b/nix/devshell.nix
deleted file mode 100644
index ab9d0d7..0000000
--- a/nix/devshell.nix
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-  pkgs,
-  vault-hier,
-  rustVersion,
-}:
-
-let
-  toolchain_with_src = (
-    rustVersion.override {
-      extensions = [
-        "rustfmt"
-        "clippy"
-        "rust-src"
-      ];
-    }
-  );
-in
-pkgs.mkShell {
-  packages = with pkgs; [
-    vault-hier # Add the vault-hier package to the dev shell
-    toolchain_with_src # Add the custom Rust toolchain with source code to the dev shell
-  ];
-  nativeBuildInputs = [
-    vault-hier
-  ];
-}
diff --git a/nix/packages/vault-hier.nix b/nix/packages/vault-hier.nix
deleted file mode 100644
index 6dcfa6e..0000000
--- a/nix/packages/vault-hier.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  pkgs,
-  craneLib,
-  individualCrateArgs,
-}:
-craneLib.buildPackage (
-  individualCrateArgs
-  // {
-    pname = "vault-hier";
-    cargoExtraArgs = "-p vault-hier";
-  }
-)
diff --git a/nix/rust-setup.nix b/nix/rust-setup.nix
deleted file mode 100644
index febf4ae..0000000
--- a/nix/rust-setup.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-{ pkgs, crane }:
-
-let
-  rustVersion = pkgs.rust-bin.fromRustupToolchainFile (../rust-toolchain.toml);
-  rustPlatform = pkgs.makeRustPlatform {
-    cargo = rustVersion;
-    rustc = rustVersion;
-  };
-  craneLib = (crane.mkLib pkgs).overrideToolchain rustVersion;
-in
-{
-  inherit rustVersion rustPlatform craneLib;
-}
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
deleted file mode 100644
index 3d4ba0c..0000000
--- a/rust-toolchain.toml
+++ /dev/null
@@ -1,3 +0,0 @@
-[toolchain]
-channel = "1.85.1"
-components = ["rustfmt", "clippy", "rust-src"]
diff --git a/src/api.rs b/src/api.rs
index 499e931..f632b54 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -1,14 +1,15 @@
 use anyhow::Result;
 use axum::{
-    Json, Router, Server,
     extract::{Multipart, Path, State},
     http::StatusCode,
     response::{IntoResponse, Response},
     routing::{get, post},
+    Json, Router,
+    Server,
 };
 use serde::{Deserialize, Serialize};
 use std::sync::Arc;
-use tracing::{debug, error, info, instrument};
+use tracing::{info, error, debug, instrument};
 
 use crate::document_service::{Document, DocumentService, SignatureVerification};
 use crate::vault_setup::VaultClient;
@@ -67,7 +68,11 @@ where
 
 // Start the API server
 #[instrument(skip(vault_addr, root_token))]
-pub async fn start_api(vault_addr: &str, root_token: &str, api_port: u16) -> Result<()> {
+pub async fn start_api(
+    vault_addr: &str,
+    root_token: &str,
+    api_port: u16,
+) -> Result<()> {
     info!("Starting API server on port {}...", api_port);
 
     // Initialize Vault client
@@ -105,7 +110,9 @@ pub async fn start_api(vault_addr: &str, root_token: &str, api_port: u16) -> Res
 
     // Bind and serve
     info!("Serving API at {}", addr);
-    Server::bind(&addr).serve(app.into_make_service()).await?;
+    Server::bind(&addr)
+        .serve(app.into_make_service())
+        .await?;
 
     Ok(())
 }
@@ -125,8 +132,7 @@ async fn login(
 ) -> Result<Json<LoginResponse>, ApiError> {
     info!("Login attempt for user: {}", request.username);
 
-    let token = state
-        .vault_client
+    let token = state.vault_client
         .login_user(&request.username, &request.password)
         .await?;
 
@@ -154,10 +160,7 @@ async fn upload_document(
             debug!("Received document name: {}", document_name);
         } else if name == "file" {
             document_content = field.bytes().await?.to_vec();
-            debug!(
-                "Received document content: {} bytes",
-                document_content.len()
-            );
+            debug!("Received document content: {} bytes", document_content.len());
         }
     }
 
@@ -167,13 +170,14 @@ async fn upload_document(
     }
 
     // Upload document
-    let document_id = state
-        .document_service
+    let document_id = state.document_service
         .upload_document(&document_name, &document_content)
         .await?;
 
     // Return document metadata
-    let document = state.document_service.get_document(&document_id).await?;
+    let document = state.document_service
+        .get_document(&document_id)
+        .await?;
 
     info!("Document uploaded successfully with ID: {}", document_id);
     Ok(Json(document))
@@ -187,13 +191,12 @@ async fn get_document(
 ) -> Result<Json<Document>, ApiError> {
     info!("Fetching document: {}", document_id);
 
-    let document = state.document_service.get_document(&document_id).await?;
+    let document = state.document_service
+        .get_document(&document_id)
+        .await?;
 
-    debug!(
-        "Retrieved document {} with {} signatures",
-        document.id,
-        document.signatures.len()
-    );
+    debug!("Retrieved document {} with {} signatures",
+           document.id, document.signatures.len());
 
     Ok(Json(document))
 }
@@ -205,22 +208,17 @@ async fn sign_document(
     Path(document_id): Path<String>,
     Json(request): Json<SignDocumentRequest>,
 ) -> Result<Json<Document>, ApiError> {
-    info!(
-        "Signing request for document {} by user {}",
-        document_id, request.username
-    );
+    info!("Signing request for document {} by user {}", document_id, request.username);
 
-    state
-        .document_service
+    state.document_service
         .sign_document(&document_id, &request.username, &request.token)
         .await?;
 
-    let document = state.document_service.get_document(&document_id).await?;
+    let document = state.document_service
+        .get_document(&document_id)
+        .await?;
 
-    info!(
-        "Document {} successfully signed by {}",
-        document_id, request.username
-    );
+    info!("Document {} successfully signed by {}", document_id, request.username);
     Ok(Json(document))
 }
 
@@ -232,20 +230,12 @@ async fn verify_document(
 ) -> Result<Json<SignatureVerification>, ApiError> {
     info!("Verifying document signatures: {}", document_id);
 
-    let verification = state
-        .document_service
+    let verification = state.document_service
         .verify_document_signatures(&document_id)
         .await?;
 
-    info!(
-        "Document {} verification result: {}",
-        document_id,
-        if verification.is_verified {
-            "VERIFIED"
-        } else {
-            "PENDING"
-        }
-    );
+    info!("Document {} verification result: {}",
+           document_id, if verification.is_verified { "VERIFIED" } else { "PENDING" });
 
     Ok(Json(verification))
 }
diff --git a/src/document_service.rs b/src/document_service.rs
index bba4a80..41f357f 100644
--- a/src/document_service.rs
+++ b/src/document_service.rs
@@ -1,12 +1,12 @@
 use anyhow::{Context, Result};
-use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64};
 use reqwest::StatusCode;
 use serde::{Deserialize, Serialize};
 use serde_json::json;
-use sha2::{Digest, Sha256};
+use sha2::{Sha256, Digest};
 use std::collections::HashMap;
-use tracing::{debug, error, info, instrument};
 use uuid::Uuid;
+use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64};
+use tracing::{info, error, debug, instrument};
 
 use crate::vault_setup::{Department, User, VaultClient};
 
@@ -88,10 +88,8 @@ impl DocumentService {
     async fn store_document_metadata(&self, document: &Document) -> Result<()> {
         debug!("Storing document metadata for {}", document.id);
 
-        let url = format!(
-            "{}/v1/documents/data/docs/{}",
-            self.vault_client.addr, document.id
-        );
+        let url = format!("{}/v1/documents/data/docs/{}",
+            self.vault_client.addr, document.id);
 
         let payload = json!({
             "data": {
@@ -106,9 +104,7 @@ impl DocumentService {
             }
         });
 
-        let response = self
-            .vault_client
-            .client
+        let response = self.vault_client.client
             .post(&url)
             .header("X-Vault-Token", &self.vault_client.token)
             .json(&payload)
@@ -122,15 +118,8 @@ impl DocumentService {
             }
             status => {
                 let error_text = response.text().await?;
-                error!(
-                    "Failed to store document metadata: {} - {}",
-                    status, error_text
-                );
-                Err(anyhow::anyhow!(
-                    "Failed to store document metadata: {} - {}",
-                    status,
-                    error_text
-                ))
+                error!("Failed to store document metadata: {} - {}", status, error_text);
+                Err(anyhow::anyhow!("Failed to store document metadata: {} - {}", status, error_text))
             }
         }
     }
@@ -140,14 +129,10 @@ impl DocumentService {
     pub async fn get_document(&self, document_id: &str) -> Result<Document> {
         debug!("Getting document metadata for {}", document_id);
 
-        let url = format!(
-            "{}/v1/documents/data/docs/{}",
-            self.vault_client.addr, document_id
-        );
+        let url = format!("{}/v1/documents/data/docs/{}",
+            self.vault_client.addr, document_id);
 
-        let response = self
-            .vault_client
-            .client
+        let response = self.vault_client.client
             .get(&url)
             .header("X-Vault-Token", &self.vault_client.token)
             .send()
@@ -184,49 +169,27 @@ impl DocumentService {
                 }
 
                 let document = Document {
-                    id: json["data"]["data"]["id"]
-                        .as_str()
-                        .context("Missing id")?
-                        .to_string(),
-                    name: json["data"]["data"]["name"]
-                        .as_str()
-                        .context("Missing name")?
-                        .to_string(),
-                    hash: json["data"]["data"]["hash"]
-                        .as_str()
-                        .context("Missing hash")?
-                        .to_string(),
+                    id: json["data"]["data"]["id"].as_str().context("Missing id")?.to_string(),
+                    name: json["data"]["data"]["name"].as_str().context("Missing name")?.to_string(),
+                    hash: json["data"]["data"]["hash"].as_str().context("Missing hash")?.to_string(),
                     status,
                     signatures,
                 };
 
-                debug!(
-                    "Retrieved document: {} with {} signatures",
-                    document.id,
-                    document.signatures.len()
-                );
+                debug!("Retrieved document: {} with {} signatures", document.id, document.signatures.len());
                 Ok(document)
             }
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to get document: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to get document: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to get document: {} - {}", status, error_text))
             }
         }
     }
 
     // Sign a document with the user's key
     #[instrument(skip(self, user_token), fields(document_id = %document_id, username = %username))]
-    pub async fn sign_document(
-        &self,
-        document_id: &str,
-        username: &str,
-        user_token: &str,
-    ) -> Result<()> {
+    pub async fn sign_document(&self, document_id: &str, username: &str, user_token: &str) -> Result<()> {
         info!("Signing document {} by user {}", document_id, username);
 
         // Get document metadata
@@ -236,15 +199,14 @@ impl DocumentService {
         let user = self.vault_client.get_user_info(username).await?;
 
         // Sign the document hash with user's key
-        let url = format!("{}/v1/transit/sign/{}", self.vault_client.addr, username);
+        let url = format!("{}/v1/transit/sign/{}",
+            self.vault_client.addr, username);
 
         let payload = json!({
             "input": BASE64.encode(document.hash.as_bytes()),
         });
 
-        let response = self
-            .vault_client
-            .client
+        let response = self.vault_client.client
             .post(&url)
             .header("X-Vault-Token", user_token)
             .json(&payload)
@@ -262,8 +224,7 @@ impl DocumentService {
                 debug!("Generated signature for document {}", document_id);
 
                 // Update document with signature
-                self.add_signature(document_id, username, &signature)
-                    .await?;
+                self.add_signature(document_id, username, &signature).await?;
 
                 // Update department signature record
                 self.record_department_signature(document_id, &user).await?;
@@ -277,43 +238,26 @@ impl DocumentService {
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to sign document: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to sign document: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to sign document: {} - {}", status, error_text))
             }
         }
     }
 
     // Add a signature to a document
     #[instrument(skip(self, signature), fields(document_id = %document_id, username = %username))]
-    async fn add_signature(
-        &self,
-        document_id: &str,
-        username: &str,
-        signature: &str,
-    ) -> Result<()> {
-        debug!(
-            "Adding signature from {} to document {}",
-            username, document_id
-        );
+    async fn add_signature(&self, document_id: &str, username: &str, signature: &str) -> Result<()> {
+        debug!("Adding signature from {} to document {}", username, document_id);
 
         // Get current document
         let mut document = self.get_document(document_id).await?;
 
         // Add signature
-        document
-            .signatures
-            .insert(username.to_string(), signature.to_string());
+        document.signatures.insert(username.to_string(), signature.to_string());
 
         // Store updated document
         self.store_document_metadata(&document).await?;
 
-        debug!(
-            "Added signature from {} to document {}",
-            username, document_id
-        );
+        debug!("Added signature from {} to document {}", username, document_id);
         Ok(())
     }
 
@@ -325,20 +269,13 @@ impl DocumentService {
             Department::Finance => "finance",
         };
 
-        debug!(
-            "Recording {} department signature for document {}",
-            dept_str, document_id
-        );
+        debug!("Recording {} department signature for document {}", dept_str, document_id);
 
-        let url = format!(
-            "{}/v1/documents/data/dept/{}/signatures/{}",
-            self.vault_client.addr, dept_str, document_id
-        );
+        let url = format!("{}/v1/documents/data/dept/{}/signatures/{}",
+            self.vault_client.addr, dept_str, document_id);
 
         // Check if department signatures already exist
-        let response = self
-            .vault_client
-            .client
+        let response = self.vault_client.client
             .get(&url)
             .header("X-Vault-Token", &self.vault_client.token)
             .send()
@@ -372,9 +309,7 @@ impl DocumentService {
             }
         });
 
-        let response = self
-            .vault_client
-            .client
+        let response = self.vault_client.client
             .post(&url)
             .header("X-Vault-Token", &self.vault_client.token)
             .json(&payload)
@@ -383,23 +318,13 @@ impl DocumentService {
 
         match response.status() {
             StatusCode::OK | StatusCode::NO_CONTENT => {
-                info!(
-                    "Recorded signature for {} in {} department",
-                    user.username, dept_str
-                );
+                info!("Recorded signature for {} in {} department", user.username, dept_str);
                 Ok(())
             }
             status => {
                 let error_text = response.text().await?;
-                error!(
-                    "Failed to record department signature: {} - {}",
-                    status, error_text
-                );
-                Err(anyhow::anyhow!(
-                    "Failed to record department signature: {} - {}",
-                    status,
-                    error_text
-                ))
+                error!("Failed to record department signature: {} - {}", status, error_text);
+                Err(anyhow::anyhow!("Failed to record department signature: {} - {}", status, error_text))
             }
         }
     }
@@ -439,24 +364,17 @@ impl DocumentService {
 
     // Verify document signatures
     #[instrument(skip(self))]
-    pub async fn verify_document_signatures(
-        &self,
-        document_id: &str,
-    ) -> Result<SignatureVerification> {
+    pub async fn verify_document_signatures(&self, document_id: &str) -> Result<SignatureVerification> {
         info!("Verifying signatures for document {}", document_id);
 
         // Get document
         let document = self.get_document(document_id).await?;
 
         // Get signing requirements
-        let url = format!(
-            "{}/v1/documents/data/config/signing_requirements",
-            self.vault_client.addr
-        );
+        let url = format!("{}/v1/documents/data/config/signing_requirements",
+            self.vault_client.addr);
 
-        let response = self
-            .vault_client
-            .client
+        let response = self.vault_client.client
             .get(&url)
             .header("X-Vault-Token", &self.vault_client.token)
             .send()
@@ -466,15 +384,8 @@ impl DocumentService {
             StatusCode::OK => response.json::<serde_json::Value>().await?,
             status => {
                 let error_text = response.text().await?;
-                error!(
-                    "Failed to get signing requirements: {} - {}",
-                    status, error_text
-                );
-                return Err(anyhow::anyhow!(
-                    "Failed to get signing requirements: {} - {}",
-                    status,
-                    error_text
-                ));
+                error!("Failed to get signing requirements: {} - {}", status, error_text);
+                return Err(anyhow::anyhow!("Failed to get signing requirements: {} - {}", status, error_text));
             }
         };
 
@@ -502,15 +413,13 @@ impl DocumentService {
 
         // Get department signatures
         let legal_signatures = self.get_department_signatures(document_id, "legal").await?;
-        let finance_signatures = self
-            .get_department_signatures(document_id, "finance")
-            .await?;
+        let finance_signatures = self.get_department_signatures(document_id, "finance").await?;
 
         // Check if requirements are met
         let total_signatures = document.signatures.len();
-        let is_verified = total_signatures >= required_signatures
-            && legal_signatures.len() >= required_legal
-            && finance_signatures.len() >= required_finance;
+        let is_verified = total_signatures >= required_signatures &&
+                          legal_signatures.len() >= required_legal &&
+                          finance_signatures.len() >= required_finance;
 
         let verification = SignatureVerification {
             document_id: document_id.to_string(),
@@ -540,24 +449,13 @@ impl DocumentService {
 
     // Get department signatures for a document
     #[instrument(skip(self))]
-    async fn get_department_signatures(
-        &self,
-        document_id: &str,
-        department: &str,
-    ) -> Result<Vec<String>> {
-        debug!(
-            "Getting {} department signatures for document {}",
-            department, document_id
-        );
+    async fn get_department_signatures(&self, document_id: &str, department: &str) -> Result<Vec<String>> {
+        debug!("Getting {} department signatures for document {}", department, document_id);
 
-        let url = format!(
-            "{}/v1/documents/data/dept/{}/signatures/{}",
-            self.vault_client.addr, department, document_id
-        );
+        let url = format!("{}/v1/documents/data/dept/{}/signatures/{}",
+            self.vault_client.addr, department, document_id);
 
-        let response = self
-            .vault_client
-            .client
+        let response = self.vault_client.client
             .get(&url)
             .header("X-Vault-Token", &self.vault_client.token)
             .send()
@@ -579,12 +477,8 @@ impl DocumentService {
             }
         }
 
-        debug!(
-            "Found {} signatures for {} department on document {}",
-            signatures.len(),
-            department,
-            document_id
-        );
+        debug!("Found {} signatures for {} department on document {}",
+               signatures.len(), department, document_id);
 
         Ok(signatures)
     }
diff --git a/src/lib.rs b/src/lib.rs
index ed3598d..7ce0e6f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,11 +1,11 @@
 // Modules that implement our hierarchical signing system
-pub mod api;
-pub mod document_service;
-pub mod vault_init;
 pub mod vault_setup;
+pub mod vault_init;
+pub mod document_service;
+pub mod api;
 
 // Re-export main components for easier access
-pub use api::start_api;
-pub use document_service::DocumentService;
-pub use vault_init::initialize_vault;
 pub use vault_setup::VaultClient;
+pub use vault_init::initialize_vault;
+pub use document_service::DocumentService;
+pub use api::start_api;
diff --git a/src/main.rs b/src/main.rs
index a106db3..d57cd89 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,18 +1,14 @@
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 use std::path::PathBuf;
-use tracing::info;
-use tracing_subscriber::{EnvFilter, fmt};
+use tracing::{info};
+use tracing_subscriber::{fmt, EnvFilter};
 
 // Import our library
-use vault_hier::{initialize_vault, start_api};
+use vault_hier::{start_api, initialize_vault};
 
 #[derive(Parser)]
-#[command(
-    author,
-    version,
-    about = "Hierarchical Document Signing with HashiCorp Vault"
-)]
+#[command(author, version, about = "Hierarchical Document Signing with HashiCorp Vault")]
 struct Cli {
     #[command(subcommand)]
     command: Commands,
@@ -121,49 +117,27 @@ async fn main() -> Result<()> {
     let cli = Cli::parse();
 
     match cli.command {
-        Commands::Server {
-            vault_addr,
-            api_port,
-        } => {
+        Commands::Server { vault_addr, api_port } => {
             run_server(&vault_addr, api_port).await?;
-        }
-        Commands::Login {
-            username,
-            password,
-            api_url,
-        } => {
+        },
+        Commands::Login { username, password, api_url } => {
             login(&username, &password, &api_url).await?;
-        }
-        Commands::Upload {
-            name,
-            file,
-            api_url,
-        } => {
+        },
+        Commands::Upload { name, file, api_url } => {
             upload_document(&name, file, &api_url).await?;
-        }
-        Commands::Sign {
-            document_id,
-            username,
-            token,
-            api_url,
-        } => {
+        },
+        Commands::Sign { document_id, username, token, api_url } => {
             sign_document(&document_id, &username, &token, &api_url).await?;
-        }
-        Commands::Verify {
-            document_id,
-            api_url,
-        } => {
+        },
+        Commands::Verify { document_id, api_url } => {
             verify_document(&document_id, &api_url).await?;
-        }
+        },
         Commands::List { api_url } => {
             list_documents(&api_url).await?;
-        }
-        Commands::Get {
-            document_id,
-            api_url,
-        } => {
+        },
+        Commands::Get { document_id, api_url } => {
             get_document(&document_id, &api_url).await?;
-        }
+        },
     }
 
     Ok(())
@@ -191,7 +165,7 @@ async fn login(username: &str, password: &str, api_url: &str) -> Result<()> {
 
     let client = reqwest::Client::new();
     let response = client
-        .post(format!("{}/api/login", api_url))
+        .post(&format!("{}/api/login", api_url))
         .json(&serde_json::json!({
             "username": username,
             "password": password,
@@ -220,14 +194,12 @@ async fn upload_document(name: &str, file_path: PathBuf, api_url: &str) -> Resul
 
     let form = reqwest::multipart::Form::new()
         .text("name", name.to_string())
-        .part(
-            "file",
-            reqwest::multipart::Part::bytes(file_content).file_name(file_name.to_string()),
-        );
+        .part("file", reqwest::multipart::Part::bytes(file_content)
+            .file_name(file_name.to_string()));
 
     let client = reqwest::Client::new();
     let response = client
-        .post(format!("{}/api/documents", api_url))
+        .post(&format!("{}/api/documents", api_url))
         .multipart(form)
         .send()
         .await?;
@@ -244,17 +216,12 @@ async fn upload_document(name: &str, file_path: PathBuf, api_url: &str) -> Resul
     Ok(())
 }
 
-async fn sign_document(
-    document_id: &str,
-    username: &str,
-    token: &str,
-    api_url: &str,
-) -> Result<()> {
+async fn sign_document(document_id: &str, username: &str, token: &str, api_url: &str) -> Result<()> {
     info!("Signing document: {}", document_id);
 
     let client = reqwest::Client::new();
     let response = client
-        .post(format!("{}/api/documents/{}/sign", api_url, document_id))
+        .post(&format!("{}/api/documents/{}/sign", api_url, document_id))
         .json(&serde_json::json!({
             "username": username,
             "token": token,
@@ -279,7 +246,7 @@ async fn verify_document(document_id: &str, api_url: &str) -> Result<()> {
 
     let client = reqwest::Client::new();
     let response = client
-        .get(format!("{}/api/documents/{}/verify", api_url, document_id))
+        .get(&format!("{}/api/documents/{}/verify", api_url, document_id))
         .send()
         .await?;
 
@@ -288,21 +255,16 @@ async fn verify_document(document_id: &str, api_url: &str) -> Result<()> {
         println!("Verification result:");
         println!("  Valid: {}", data["valid"]);
         println!("  Total signatures: {}", data["signature_count"]);
-        println!(
-            "  Departments represented: {}",
-            data["departments_represented"]
-        );
+        println!("  Departments represented: {}", data["departments_represented"]);
 
         if let Some(signatures) = data["signatures"].as_array() {
             println!("\nSignatures:");
             for (i, sig) in signatures.iter().enumerate() {
-                println!(
-                    "  {}. User: {}, Department: {}, Time: {}",
-                    i + 1,
+                println!("  {}. User: {}, Department: {}, Time: {}",
+                    i+1,
                     sig["username"],
                     sig["department"],
-                    sig["timestamp"]
-                );
+                    sig["timestamp"]);
             }
         }
     } else {
@@ -318,7 +280,7 @@ async fn list_documents(api_url: &str) -> Result<()> {
 
     let client = reqwest::Client::new();
     let response = client
-        .get(format!("{}/api/documents", api_url))
+        .get(&format!("{}/api/documents", api_url))
         .send()
         .await?;
 
@@ -327,7 +289,7 @@ async fn list_documents(api_url: &str) -> Result<()> {
         println!("Documents:");
 
         for (i, doc) in data.iter().enumerate() {
-            println!("  {}. ID: {}, Name: {}", i + 1, doc["id"], doc["name"]);
+            println!("  {}. ID: {}, Name: {}", i+1, doc["id"], doc["name"]);
         }
 
         if data.is_empty() {
@@ -346,7 +308,7 @@ async fn get_document(document_id: &str, api_url: &str) -> Result<()> {
 
     let client = reqwest::Client::new();
     let response = client
-        .get(format!("{}/api/documents/{}", api_url, document_id))
+        .get(&format!("{}/api/documents/{}", api_url, document_id))
         .send()
         .await?;
 
@@ -361,13 +323,11 @@ async fn get_document(document_id: &str, api_url: &str) -> Result<()> {
         if let Some(signatures) = doc["signatures"].as_array() {
             println!("\nSignatures:");
             for (i, sig) in signatures.iter().enumerate() {
-                println!(
-                    "  {}. User: {}, Department: {}, Time: {}",
-                    i + 1,
+                println!("  {}. User: {}, Department: {}, Time: {}",
+                    i+1,
                     sig["username"],
                     sig["department"],
-                    sig["timestamp"]
-                );
+                    sig["timestamp"]);
             }
 
             if signatures.is_empty() {
diff --git a/src/vault_init.rs b/src/vault_init.rs
index 1e3005c..9d489e1 100644
--- a/src/vault_init.rs
+++ b/src/vault_init.rs
@@ -1,7 +1,10 @@
 use anyhow::{Context, Result};
 use reqwest::Client;
-use std::{env, fs};
-use tracing::{debug, error, info, warn};
+use std::{
+    env,
+    fs,
+};
+use tracing::{info, warn, error, debug};
 
 use crate::vault_setup::VaultClient;
 
@@ -13,17 +16,14 @@ pub async fn initialize_vault(vault_addr: &str) -> Result<String> {
     VaultClient::wait_for_vault(vault_addr).await?;
 
     // Display Vault health status
-    let health_url = format!(
-        "{}/v1/sys/health?standbyok=true&sealedok=true&uninitok=true",
-        vault_addr
-    );
+    let health_url = format!("{}/v1/sys/health?standbyok=true&sealedok=true&uninitok=true", vault_addr);
     match client.get(&health_url).send().await {
         Ok(response) => {
             if response.status().is_success() {
                 let status_text = response.text().await?;
                 info!("Vault status: {}", status_text);
             }
-        }
+        },
         Err(e) => warn!("Error getting Vault status: {}", e),
     }
 
@@ -47,7 +47,7 @@ pub async fn initialize_vault(vault_addr: &str) -> Result<String> {
                     Ok(key) => {
                         info!("Found unseal key {} from environment", i);
                         unseal_keys.push(key);
-                    }
+                    },
                     Err(_) => {
                         debug!("Unseal key {} not found in environment", i);
                     }
@@ -56,16 +56,11 @@ pub async fn initialize_vault(vault_addr: &str) -> Result<String> {
 
             // If we have unseal keys, try to unseal
             if !unseal_keys.is_empty() {
-                info!(
-                    "Found {} unseal keys. Attempting to unseal...",
-                    unseal_keys.len()
-                );
+                info!("Found {} unseal keys. Attempting to unseal...", unseal_keys.len());
                 VaultClient::unseal_vault(&client, vault_addr, &unseal_keys).await?;
             } else {
                 warn!("No unseal keys found. Vault remains sealed.");
-                info!(
-                    "To unseal, set VAULT_UNSEAL_KEY_1, VAULT_UNSEAL_KEY_2, etc. environment variables."
-                );
+                info!("To unseal, set VAULT_UNSEAL_KEY_1, VAULT_UNSEAL_KEY_2, etc. environment variables.");
             }
         } else {
             info!("Vault is already unsealed.");
@@ -76,7 +71,7 @@ pub async fn initialize_vault(vault_addr: &str) -> Result<String> {
             Ok(token) => {
                 info!("Found root token from environment");
                 root_token = token;
-            }
+            },
             Err(_) => {
                 // Try to load from credentials file
                 if let Ok(contents) = fs::read_to_string("vault-credentials.json") {
@@ -91,12 +86,8 @@ pub async fn initialize_vault(vault_addr: &str) -> Result<String> {
         }
 
         if root_token.is_empty() {
-            error!(
-                "Unable to find root token. Please set VAULT_TOKEN environment variable or provide vault-credentials.json file."
-            );
-            anyhow::bail!(
-                "Unable to find root token. Please set VAULT_TOKEN environment variable or provide vault-credentials.json file."
-            );
+            error!("Unable to find root token. Please set VAULT_TOKEN environment variable or provide vault-credentials.json file.");
+            anyhow::bail!("Unable to find root token. Please set VAULT_TOKEN environment variable or provide vault-credentials.json file.");
         }
     } else {
         // Initialize Vault
@@ -121,17 +112,11 @@ pub async fn initialize_vault(vault_addr: &str) -> Result<String> {
         if let Ok(()) = std::fs::create_dir_all("/app/data") {
             let docker_json_path = "/app/data/vault-credentials.json";
             VaultClient::save_credentials(&init_response, docker_json_path)?;
-            info!(
-                "Backup JSON credentials saved to Docker volume at: {}",
-                docker_json_path
-            );
+            info!("Backup JSON credentials saved to Docker volume at: {}", docker_json_path);
 
             let docker_text_path = "/app/data/vault-credentials.txt";
             VaultClient::save_credentials(&init_response, docker_text_path)?;
-            info!(
-                "Backup text credentials saved to Docker volume at: {}",
-                docker_text_path
-            );
+            info!("Backup text credentials saved to Docker volume at: {}", docker_text_path);
         }
 
         info!("=========================================");
@@ -145,10 +130,8 @@ pub async fn initialize_vault(vault_addr: &str) -> Result<String> {
         info!("=========================================");
 
         // Unseal Vault using the first three keys
-        let unseal_keys = init_response
-            .keys_base64
-            .iter()
-            .take(3) // We only need threshold number of keys (3)
+        let unseal_keys = init_response.keys_base64.iter()
+            .take(3)  // We only need threshold number of keys (3)
             .cloned()
             .collect::<Vec<String>>();
 
diff --git a/src/vault_setup.rs b/src/vault_setup.rs
index f0cc020..872840e 100644
--- a/src/vault_setup.rs
+++ b/src/vault_setup.rs
@@ -2,9 +2,14 @@ use anyhow::{Context, Result};
 use reqwest::{Client, StatusCode};
 use serde::{Deserialize, Serialize};
 use serde_json::json;
-use std::{fs::File, io::Write, path::Path, time::Duration};
+use std::{
+    fs::File,
+    io::Write,
+    path::Path,
+    time::Duration,
+};
 use tokio::time::sleep;
-use tracing::{debug, error, info, instrument};
+use tracing::{info, error, debug, instrument};
 
 // Vault API response structures
 #[derive(Debug, Deserialize)]
@@ -72,17 +77,9 @@ impl VaultClient {
         let client = Client::new();
 
         for i in 1..=30 {
-            let health_url = format!(
-                "{}/v1/sys/health?standbyok=true&sealedok=true&uninitok=true",
-                addr
-            );
+            let health_url = format!("{}/v1/sys/health?standbyok=true&sealedok=true&uninitok=true", addr);
 
-            match client
-                .get(&health_url)
-                .timeout(Duration::from_secs(1))
-                .send()
-                .await
-            {
+            match client.get(&health_url).timeout(Duration::from_secs(1)).send().await {
                 Ok(response) => {
                     let status = response.status().as_u16();
                     // Accept any of these status codes as "available"
@@ -92,7 +89,7 @@ impl VaultClient {
                     }
 
                     debug!("Vault returned unexpected status code: {}", status);
-                }
+                },
                 Err(e) => {
                     debug!("Error connecting to Vault: {}", e);
                 }
@@ -100,9 +97,7 @@ impl VaultClient {
 
             if i == 30 {
                 error!("Timed out waiting for Vault to become available");
-                return Err(anyhow::anyhow!(
-                    "Timed out waiting for Vault to become available"
-                ));
+                return Err(anyhow::anyhow!("Timed out waiting for Vault to become available"));
             }
 
             info!("Vault is unavailable - sleeping (attempt {}/30)", i);
@@ -117,7 +112,10 @@ impl VaultClient {
     pub async fn check_init_status(client: &Client, addr: &str) -> Result<bool> {
         info!("Checking if Vault is already initialized...");
 
-        let response = client.get(format!("{}/v1/sys/init", addr)).send().await?;
+        let response = client
+            .get(format!("{}/v1/sys/init", addr))
+            .send()
+            .await?;
 
         if response.status().is_success() {
             let status = response.json::<serde_json::Value>().await?;
@@ -142,10 +140,8 @@ impl VaultClient {
 
         if response.status().is_success() {
             let status = response.json::<SealStatusResponse>().await?;
-            info!(
-                "Seal status: sealed={}, threshold={}, shares={}, progress={}",
-                status.sealed, status.t, status.n, status.progress
-            );
+            info!("Seal status: sealed={}, threshold={}, shares={}, progress={}",
+                status.sealed, status.t, status.n, status.progress);
             return Ok(status);
         } else {
             let error_text = response.text().await?;
@@ -228,7 +224,9 @@ impl VaultClient {
         for (i, key) in unseal_keys.iter().take(required_keys).enumerate() {
             info!("Applying unseal key {}/{}...", i + 1, required_keys);
 
-            let unseal_req = UnsealRequest { key: key.clone() };
+            let unseal_req = UnsealRequest {
+                key: key.clone(),
+            };
 
             let response = client
                 .put(format!("{}/v1/sys/unseal", addr))
@@ -321,8 +319,7 @@ impl VaultClient {
             "type": engine_type,
         });
 
-        let response = self
-            .client
+        let response = self.client
             .post(&url)
             .header("X-Vault-Token", &self.token)
             .json(&payload)
@@ -342,23 +339,13 @@ impl VaultClient {
                     Ok(())
                 } else {
                     error!("Failed to enable secrets engine: {}", error_text);
-                    Err(anyhow::anyhow!(
-                        "Failed to enable secrets engine: {}",
-                        error_text
-                    ))
+                    Err(anyhow::anyhow!("Failed to enable secrets engine: {}", error_text))
                 }
             }
             status => {
                 let error_text = response.text().await?;
-                error!(
-                    "Failed to enable secrets engine: {} - {}",
-                    status, error_text
-                );
-                Err(anyhow::anyhow!(
-                    "Failed to enable secrets engine: {} - {}",
-                    status,
-                    error_text
-                ))
+                error!("Failed to enable secrets engine: {} - {}", status, error_text);
+                Err(anyhow::anyhow!("Failed to enable secrets engine: {} - {}", status, error_text))
             }
         }
     }
@@ -373,8 +360,7 @@ impl VaultClient {
             "type": method,
         });
 
-        let response = self
-            .client
+        let response = self.client
             .post(&url)
             .header("X-Vault-Token", &self.token)
             .json(&payload)
@@ -394,38 +380,25 @@ impl VaultClient {
                     Ok(())
                 } else {
                     error!("Failed to enable auth method: {}", error_text);
-                    Err(anyhow::anyhow!(
-                        "Failed to enable auth method: {}",
-                        error_text
-                    ))
+                    Err(anyhow::anyhow!("Failed to enable auth method: {}", error_text))
                 }
             }
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to enable auth method: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to enable auth method: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to enable auth method: {} - {}", status, error_text))
             }
         }
     }
 
     // Create a new user in Vault and associate with department
     #[instrument(skip(self, password))]
-    pub async fn create_user(
-        &self,
-        username: &str,
-        password: &str,
-        department: Department,
-    ) -> Result<()> {
+    pub async fn create_user(&self, username: &str, password: &str, department: Department) -> Result<()> {
         info!("Creating user {} in department {:?}", username, department);
 
         // Step 1: Create a policy for the user
         let policy_name = format!("{}-policy", username);
-        self.create_signing_policy(&policy_name, department.clone())
-            .await?;
+        self.create_signing_policy(&policy_name, department.clone()).await?;
 
         // Step 2: Create the user with userpass auth
         let url = format!("{}/v1/auth/userpass/users/{}", self.addr, username);
@@ -434,8 +407,7 @@ impl VaultClient {
             "policies": [policy_name],
         });
 
-        let response = self
-            .client
+        let response = self.client
             .post(&url)
             .header("X-Vault-Token", &self.token)
             .json(&payload)
@@ -457,11 +429,7 @@ impl VaultClient {
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to create user: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to create user: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to create user: {} - {}", status, error_text))
             }
         }
     }
@@ -476,10 +444,9 @@ impl VaultClient {
 
         // Get the username from the policy name (remove "-policy" suffix)
         let username = policy_name.trim_end_matches("-policy");
-
+        
         // Policy content with specific paths for the department
-        let policy = format!(
-            r#"
+        let policy = format!(r#"
             # Allow reading document metadata
             path "documents/data/docs/*" {{
                 capabilities = ["read"]
@@ -499,17 +466,14 @@ impl VaultClient {
             path "documents/data/dept/{}/signatures/*" {{
                 capabilities = ["create", "read", "update"]
             }}
-        "#,
-            username, dept_name
-        );
+        "#, username, dept_name);
 
         let url = format!("{}/v1/sys/policies/acl/{}", self.addr, policy_name);
         let payload = json!({
             "policy": policy,
         });
 
-        let response = self
-            .client
+        let response = self.client
             .put(&url)
             .header("X-Vault-Token", &self.token)
             .json(&payload)
@@ -524,11 +488,7 @@ impl VaultClient {
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to create policy: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to create policy: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to create policy: {} - {}", status, error_text))
             }
         }
     }
@@ -541,8 +501,7 @@ impl VaultClient {
             "type": "ed25519",
         });
 
-        let response = self
-            .client
+        let response = self.client
             .post(&url)
             .header("X-Vault-Token", &self.token)
             .json(&payload)
@@ -557,11 +516,7 @@ impl VaultClient {
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to create signing key: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to create signing key: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to create signing key: {} - {}", status, error_text))
             }
         }
     }
@@ -582,8 +537,7 @@ impl VaultClient {
             }
         });
 
-        let response = self
-            .client
+        let response = self.client
             .post(&url)
             .header("X-Vault-Token", &self.token)
             .json(&payload)
@@ -598,11 +552,7 @@ impl VaultClient {
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to store user metadata: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to store user metadata: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to store user metadata: {} - {}", status, error_text))
             }
         }
     }
@@ -617,8 +567,7 @@ impl VaultClient {
             let username = format!("legal{}", i);
             let password = format!("legal{}pass", i);
             debug!(username, "Creating Legal department user");
-            self.create_user(&username, &password, Department::Legal)
-                .await?;
+            self.create_user(&username, &password, Department::Legal).await?;
         }
 
         // Create 5 users in Finance department
@@ -626,8 +575,7 @@ impl VaultClient {
             let username = format!("finance{}", i);
             let password = format!("finance{}pass", i);
             debug!(username, "Creating Finance department user");
-            self.create_user(&username, &password, Department::Finance)
-                .await?;
+            self.create_user(&username, &password, Department::Finance).await?;
         }
 
         // Setup document signing requirements
@@ -642,10 +590,7 @@ impl VaultClient {
     async fn setup_signing_requirements(&self) -> Result<()> {
         info!("Setting up document signing requirements");
 
-        let url = format!(
-            "{}/v1/documents/data/config/signing_requirements",
-            self.addr
-        );
+        let url = format!("{}/v1/documents/data/config/signing_requirements", self.addr);
         let payload = json!({
             "data": {
                 "total_required": 3,
@@ -665,8 +610,7 @@ impl VaultClient {
             }
         });
 
-        let response = self
-            .client
+        let response = self.client
             .post(&url)
             .header("X-Vault-Token", &self.token)
             .json(&payload)
@@ -680,15 +624,8 @@ impl VaultClient {
             }
             status => {
                 let error_text = response.text().await?;
-                error!(
-                    "Failed to configure signing requirements: {} - {}",
-                    status, error_text
-                );
-                Err(anyhow::anyhow!(
-                    "Failed to configure signing requirements: {} - {}",
-                    status,
-                    error_text
-                ))
+                error!("Failed to configure signing requirements: {} - {}", status, error_text);
+                Err(anyhow::anyhow!("Failed to configure signing requirements: {} - {}", status, error_text))
             }
         }
     }
@@ -703,7 +640,11 @@ impl VaultClient {
             "password": password,
         });
 
-        let response = self.client.post(&url).json(&payload).send().await?;
+        let response = self.client
+            .post(&url)
+            .json(&payload)
+            .send()
+            .await?;
 
         match response.status() {
             StatusCode::OK => {
@@ -719,11 +660,7 @@ impl VaultClient {
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to login: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to login: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to login: {} - {}", status, error_text))
             }
         }
     }
@@ -735,8 +672,7 @@ impl VaultClient {
 
         let url = format!("{}/v1/documents/data/users/{}", self.addr, username);
 
-        let response = self
-            .client
+        let response = self.client
             .get(&url)
             .header("X-Vault-Token", &self.token)
             .send()
@@ -758,10 +694,7 @@ impl VaultClient {
                     }
                 };
 
-                debug!(
-                    "Retrieved user info for {} in {:?} department",
-                    username, department
-                );
+                debug!("Retrieved user info for {} in {:?} department", username, department);
                 Ok(User {
                     username: username.to_string(),
                     department,
@@ -770,11 +703,7 @@ impl VaultClient {
             status => {
                 let error_text = response.text().await?;
                 error!("Failed to get user info: {} - {}", status, error_text);
-                Err(anyhow::anyhow!(
-                    "Failed to get user info: {} - {}",
-                    status,
-                    error_text
-                ))
+                Err(anyhow::anyhow!("Failed to get user info: {} - {}", status, error_text))
             }
         }
     }