perf: send mint transactions asynchronously

zk_toolbox/crates/common/src/ethereum.rs

@@ -96,28 +96,24 @@ pub async fn mint_token(
     )?);
 
     let contract = TokenContract::new(token_address, client);
-    // contract
+
+    let mut pending_calls = vec![];
     for address in addresses {
-        if let Err(err) = mint(&contract, address, amount).await {
-            logger::warn(format!("Failed to mint {err}"))
-        }
+        pending_calls.push(contract.mint(address, amount.into()));
     }
 
-    Ok(())
-}
+    let mut pending_txs = vec![];
+    for call in &pending_calls {
+        pending_txs.push(
+            call.send()
+                .await?
+                // It's safe to set such low number of confirmations and low interval for localhost
+                .confirmations(3)
+                .interval(Duration::from_millis(30)),
+        );
+    }
+
+    futures::future::join_all(pending_txs).await;
 
-async fn mint<T: Middleware + 'static>(
-    contract: &TokenContract<T>,
-    address: Address,
-    amount: u128,
-) -> anyhow::Result<()> {
-    contract
-        .mint(address, amount.into())
-        .send()
-        .await?
-        // It's safe to set such low number of confirmations and low interval for localhost
-        .confirmations(3)
-        .interval(Duration::from_millis(30))
-        .await?;
     Ok(())
 }