feat: add --base-fee (foundry-rs#2059)

anvil/tests/it/gas.rs

@@ -3,7 +3,7 @@
 use anvil::{eth::fees::INITIAL_BASE_FEE, spawn, NodeConfig};
 use ethers::{
     prelude::Middleware,
-    types::{Address, BlockNumber, TransactionRequest},
+    types::{transaction::eip2718::TypedTransaction, Address, BlockNumber, TransactionRequest},
 };
 
 const GAS_TRANSFER: u64 = 21_000u64;
@@ -67,3 +67,24 @@ async fn test_basefee_empty_block() {
     // empty block, decreased base fee
     assert!(next_base_fee < base_fee);
 }
+
+#[tokio::test(flavor = "multi_thread")]
+async fn test_respect_base_fee() {
+    let base_fee = 50u64;
+    let (_api, handle) =
+        spawn(NodeConfig::test().with_port(next_port()).with_base_fee(Some(base_fee))).await;
+    let provider = handle.http_provider();
+    let mut tx = TypedTransaction::default();
+    tx.set_value(100u64);
+    tx.set_to(Address::random());
+
+    let mut underpriced = tx.clone();
+    underpriced.set_gas_price(base_fee - 1);
+    let res = provider.send_transaction(underpriced, None).await;
+    assert!(res.is_err());
+    assert!(res.unwrap_err().to_string().contains("max fee per gas less than block base fee"));
+
+    tx.set_gas_price(base_fee);
+    let tx = provider.send_transaction(tx, None).await.unwrap().await.unwrap().unwrap();
+    assert_eq!(tx.status, Some(1u64.into()));
+}