feat(anvil): Anvil --unlocked for auto-impersonation on instance creation

anvil/core/src/eth/mod.rs

@@ -305,8 +305,8 @@ pub enum EthRequest {
             with = "sequence"
         )
     )]
-    /// Will make every account impersonated
     StopImpersonatingAccount(Address),
+    /// Will make every account impersonated
     #[cfg_attr(
         feature = "serde",
         serde(

anvil/src/cmd.rs

@@ -197,6 +197,7 @@ impl NodeArgs {
             .with_transaction_order(self.order)
             .with_genesis(self.init)
             .with_steps_tracing(self.evm_opts.steps_tracing)
+            .with_auto_impersonate(self.evm_opts.auto_impersonate)
             .with_ipc(self.ipc)
             .with_code_size_limit(self.evm_opts.code_size_limit)
             .set_pruned_history(self.prune_history)
@@ -442,6 +443,10 @@ pub struct AnvilEvmArgs {
     /// Enable steps tracing used for debug calls returning geth-style traces
     #[clap(long, visible_alias = "tracing")]
     pub steps_tracing: bool,
+
+    /// Enable autoImpersonate on startup
+    #[clap(long, visible_alias = "auto-impersonate")]
+    pub auto_impersonate: bool,
 }
 
 /// Resolves an alias passed as fork-url to the matching url defined in the rpc_endpoints section

anvil/src/config.rs

@@ -147,6 +147,8 @@ pub struct NodeConfig {
     pub ipc_path: Option<Option<String>>,
     /// Enable transaction/call steps tracing for debug calls returning geth-style traces
     pub enable_steps_tracing: bool,
+    /// Enable auto impersonation of accounts on startup
+    pub enable_auto_impersonate: bool,
     /// Configure the code size limit
     pub code_size_limit: Option<usize>,
     /// Configures how to remove historic state.
@@ -374,6 +376,7 @@ impl Default for NodeConfig {
             base_fee: None,
             enable_tracing: true,
             enable_steps_tracing: false,
+            enable_auto_impersonate: false,
             no_storage_caching: false,
             server_config: Default::default(),
             host: None,
@@ -699,6 +702,13 @@ impl NodeConfig {
         self
     }
 
+    /// Sets whether to enable autoImpersonate
+    #[must_use]
+    pub fn with_auto_impersonate(mut self, enable_auto_impersonate: bool) -> Self {
+        self.enable_auto_impersonate = enable_auto_impersonate;
+        self
+    }
+
     #[must_use]
     pub fn with_server_config(mut self, config: ServerConfig) -> Self {
         self.server_config = config;

anvil/src/eth/api.rs

@@ -1384,7 +1384,7 @@ impl EthApi {
     /// Handler for ETH RPC call: `anvil_autoImpersonateAccount`
     pub async fn anvil_auto_impersonate_account(&self, enabled: bool) -> Result<()> {
         node_info!("anvil_autoImpersonateAccount");
-        self.backend.auto_impersonate_account(enabled).await?;
+        self.backend.auto_impersonate_account(enabled).await;
         Ok(())
     }
 

anvil/src/eth/backend/mem/mod.rs

@@ -316,9 +316,8 @@ impl Backend {
     }
 
     /// If set to true will make every account impersonated
-    pub async fn auto_impersonate_account(&self, enabled: bool) -> DatabaseResult<()> {
+    pub async fn auto_impersonate_account(&self, enabled: bool) {
         self.cheats.set_auto_impersonate_account(enabled);
-        Ok(())
     }
 
     /// Returns the configured fork, if any

anvil/src/lib.rs

@@ -96,6 +96,10 @@ pub async fn spawn(mut config: NodeConfig) -> (EthApi, NodeHandle) {
 
     let backend = Arc::new(config.setup().await);
 
+    if config.enable_auto_impersonate {
+        backend.auto_impersonate_account(true).await;
+    }
+
     let fork = backend.get_fork().cloned();
 
     let NodeConfig {