Refactor config, make ethereum integration optional

config.yaml.example

@@ -1,4 +1,5 @@
 database_url: postgres://mitra:mitra@127.0.0.1:5432/mitra
+storage_dir: files
 
 http_host: '127.0.0.1'
 http_port: 8380
@@ -6,13 +7,14 @@ http_port: 8380
 # domain name
 instance_uri: myserver.net
 instance_title: myserver
-instance_short_description: myserver is a federated social network
+instance_short_description: my fedi instance
 # Long description can contain markdown syntax
-instance_description: myserver is a federated social network
+instance_description: my fedi instance
 registrations_open: false
 # Login message must contain instance URL
 login_message: 'Sign this message to log in to https://myserver.net. Do not sign this message on other sites!'
 
+ethereum_contract_dir: contracts
 ethereum_json_rpc_url: 'http://127.0.0.1:8545'
 # Block explorer base URL (must be compatible with https://eips.ethereum.org/EIPS/eip-3091)
 ethereum_explorer_url: null

src/config.rs

@@ -58,10 +58,6 @@ fn parse_env() -> EnvConfig {
 
 fn default_environment() -> Environment { Environment::Development }
 
-fn default_storage_dir() -> PathBuf { PathBuf::from("files") }
-
-fn default_contract_dir() -> PathBuf { PathBuf::from("contracts") }
-
 #[derive(Clone, Deserialize)]
 pub struct EthereumContract {
     pub address: String,
@@ -80,8 +76,6 @@ pub struct Config {
 
     // Core settings
     pub database_url: String,
-
-    #[serde(default = "default_storage_dir")]
     pub storage_dir: PathBuf,
 
     pub http_host: String,
@@ -99,9 +93,7 @@ pub struct Config {
     pub login_message: String,
 
     // Ethereum & IPFS
-    #[serde(default = "default_contract_dir")]
-    pub contract_dir: PathBuf,
-
+    pub ethereum_contract_dir: Option<PathBuf>,
     pub ethereum_json_rpc_url: Option<String>,
     pub ethereum_explorer_url: Option<String>,
     pub ethereum_contract: Option<EthereumContract>,
@@ -141,10 +133,12 @@ pub fn parse_config() -> Config {
     config.version = env.crate_version;
     // Validate config
     if !config.storage_dir.exists() {
-        panic!("storage_dir does not exist");
+        panic!("storage directory does not exist");
     };
-    if !config.contract_dir.exists() {
-        panic!("contract directory does not exist");
+    if let Some(contract_dir) = &config.ethereum_contract_dir {
+        if !contract_dir.exists() {
+            panic!("contract directory does not exist");
+        };
     };
     config.try_instance_url().expect("invalid instance URI");
 

src/ethereum/gate.rs

@@ -13,10 +13,12 @@ pub async fn is_allowed_user(
     let json_rpc_url = config.ethereum_json_rpc_url.as_ref()
         .ok_or(EthereumError::ImproperlyConfigured)?;
     let web3 = connect(json_rpc_url)?;
+    let contract_dir = config.ethereum_contract_dir.as_ref()
+        .ok_or(EthereumError::ImproperlyConfigured)?;
     let ethereum_config = config.ethereum_contract.as_ref()
         .ok_or(EthereumError::ImproperlyConfigured)?;
 
-    let manager_abi = load_abi(&config.contract_dir, MANAGER)?;
+    let manager_abi = load_abi(contract_dir, MANAGER)?;
     let manager_address = parse_address(&ethereum_config.address)?;
     let manager = Contract::from_json(
         web3.eth(),

src/ethereum/nft.rs

@@ -33,10 +33,12 @@ pub async fn get_nft_contract(
     let json_rpc_url = config.ethereum_json_rpc_url.as_ref()
         .ok_or(EthereumError::ImproperlyConfigured)?;
     let web3 = connect(json_rpc_url)?;
+    let contract_dir = config.ethereum_contract_dir.as_ref()
+        .ok_or(EthereumError::ImproperlyConfigured)?;
     let ethereum_config = config.ethereum_contract.as_ref()
         .ok_or(EthereumError::ImproperlyConfigured)?;
 
-    let manager_abi = load_abi(&config.contract_dir, MANAGER)?;
+    let manager_abi = load_abi(contract_dir, MANAGER)?;
     let manager_address = parse_address(&ethereum_config.address)?;
     let manager = Contract::from_json(
         web3.eth(),
@@ -48,7 +50,7 @@ pub async fn get_nft_contract(
         "collectible",
         (), None, Options::default(), None,
     ).await?;
-    let token_abi = load_abi(&config.contract_dir, COLLECTIBLE)?;
+    let token_abi = load_abi(contract_dir, COLLECTIBLE)?;
     let token = Contract::from_json(
         web3.eth(),
         token_address,

src/main.rs

@@ -59,7 +59,7 @@ async fn main() -> std::io::Result<()> {
                     .allow_any_header()
             },
         };
-        App::new()
+        let mut app = App::new()
             .wrap(ActixLogger::new("%r : %s : %{r}a"))
             .wrap(cors_config)
             .wrap(create_auth_error_handler())
@@ -71,10 +71,6 @@ async fn main() -> std::io::Result<()> {
                 "/media",
                 config.media_dir(),
             ))
-            .service(actix_files::Files::new(
-                "/contracts",
-                config.contract_dir.clone(),
-            ))
             .service(oauth_api_scope())
             .service(profile_directory)
             .service(account_api_scope())
@@ -89,7 +85,15 @@ async fn main() -> std::io::Result<()> {
             .service(activitypub_scope())
             .service(get_object)
             .service(nodeinfo::get_nodeinfo)
-            .service(nodeinfo::get_nodeinfo_2_0)
+            .service(nodeinfo::get_nodeinfo_2_0);
+        if let Some(contract_dir) = &config.ethereum_contract_dir {
+            // Serve artifacts if available
+            app = app.service(actix_files::Files::new(
+                "/contracts",
+                contract_dir,
+            ));
+        }
+        app
     })
     .workers(num_workers)
     .bind(http_socket_addr)?