nit: move struct to top

Author: prestwich

bin/submit_transaction.rs

@@ -14,6 +14,35 @@ use init4_bin_base::{
 use std::time::{Duration, Instant};
 use tokio::time::timeout;
 
+#[derive(Debug, Clone, FromEnv)]
+struct Config {
+    #[from_env(var = "RPC_URL", desc = "Ethereum RPC URL")]
+    rpc_url: String,
+    #[from_env(var = "CHAIN_ID", desc = "Ethereum chain ID")]
+    chain_id: u64,
+    #[from_env(var = "AWS_KMS_KEY_ID", desc = "AWS KMS key ID")]
+    kms_key_id: String,
+    #[from_env(var = "RECIPIENT_ADDRESS", desc = "Recipient address")]
+    recipient_address: Address,
+    #[from_env(var = "SLEEP_TIME", desc = "Time to sleep between transactions")]
+    sleep_time: u64,
+}
+
+impl Config {
+    async fn provider(&self) -> HostProvider {
+        let config = aws_config::load_defaults(aws_config::BehaviorVersion::latest()).await;
+        let client = aws_sdk_kms::Client::new(&config);
+        let signer =
+            AwsSigner::new(client, self.kms_key_id.clone(), Some(self.chain_id)).await.unwrap();
+
+        ProviderBuilder::new()
+            .wallet(EthereumWallet::from(signer))
+            .connect(&self.rpc_url)
+            .await
+            .unwrap()
+    }
+}
+
 #[tokio::main]
 async fn main() {
     init4();
@@ -70,32 +99,3 @@ async fn send_transaction(provider: &HostProvider, recipient_address: Address) {
     tracing::debug!(success = receipt.status(), mine_time, hash, "transaction mined");
     histogram!("txn_submitter.tx_mine_time").record(mine_time as f64);
 }
-
-#[derive(Debug, Clone, FromEnv)]
-struct Config {
-    #[from_env(var = "RPC_URL", desc = "Ethereum RPC URL")]
-    rpc_url: String,
-    #[from_env(var = "CHAIN_ID", desc = "Ethereum chain ID")]
-    chain_id: u64,
-    #[from_env(var = "AWS_KMS_KEY_ID", desc = "AWS KMS key ID")]
-    kms_key_id: String,
-    #[from_env(var = "RECIPIENT_ADDRESS", desc = "Recipient address")]
-    recipient_address: Address,
-    #[from_env(var = "SLEEP_TIME", desc = "Time to sleep between transactions")]
-    sleep_time: u64,
-}
-
-impl Config {
-    async fn provider(&self) -> HostProvider {
-        let config = aws_config::load_defaults(aws_config::BehaviorVersion::latest()).await;
-        let client = aws_sdk_kms::Client::new(&config);
-        let signer =
-            AwsSigner::new(client, self.kms_key_id.clone(), Some(self.chain_id)).await.unwrap();
-
-        ProviderBuilder::new()
-            .wallet(EthereumWallet::from(signer))
-            .connect(&self.rpc_url)
-            .await
-            .unwrap()
-    }
-}