fix(anvil): --chain-id takes precendence over genesis (#10223)

Author: yash-atreya

crates/anvil/src/cmd.rs

@@ -223,6 +223,13 @@ impl NodeArgs {
             None => None,
         };
 
+        // --chain-id takes precedence over the genesis config
+        // if both are missing, use the default chain id
+        // <https://github.com/foundry-rs/foundry/issues/10059>
+        let chain_id = self
+            .evm
+            .chain_id
+            .map_or(self.init.as_ref().map_or(CHAIN_ID, |g| g.config.chain_id), |c| c.into());
         Ok(NodeConfig::default()
             .with_gas_limit(self.evm.gas_limit)
             .disable_block_gas_limit(self.evm.disable_block_gas_limit)
@@ -254,7 +261,7 @@ impl NodeArgs {
             .with_host(self.host)
             .set_silent(shell::is_quiet())
             .set_config_out(self.config_out)
-            .with_chain_id(self.evm.chain_id)
+            .with_chain_id(Some(chain_id))
             .with_transaction_order(self.order)
             .with_genesis(self.init)
             .with_steps_tracing(self.evm.steps_tracing)
@@ -278,7 +285,7 @@ impl NodeArgs {
     fn account_generator(&self) -> AccountGenerator {
         let mut gen = AccountGenerator::new(self.accounts as usize)
             .phrase(DEFAULT_MNEMONIC)
-            .chain_id(self.evm.chain_id.unwrap_or_else(|| CHAIN_ID.into()));
+            .chain_id(self.evm.chain_id.unwrap_or(CHAIN_ID.into()));
         if let Some(ref mnemonic) = self.mnemonic {
             gen = gen.phrase(mnemonic);
         } else if let Some(count) = self.mnemonic_random {