chore: use is_zero fn

crates/anvil/src/eth/api.rs

@@ -1562,7 +1562,7 @@ impl EthApi {
         node_info!("anvil_mine");
         let interval = interval.map(|i| i.to::<u64>());
         let blocks = num_blocks.unwrap_or(U256::from(1));
-        if blocks == U256::ZERO {
+        if blocks.is_zero() {
             return Ok(());
         }
 

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

@@ -881,7 +881,7 @@ impl Backend {
 
             let mut env = self.env.read().clone();
 
-            if env.block.basefee == revm::primitives::U256::ZERO {
+            if env.block.basefee.is_zero() {
                 // this is an edge case because the evm fails if `tx.effective_gas_price < base_fee`
                 // 0 is only possible if it's manually set
                 env.cfg.disable_base_fee = true;

crates/anvil/src/eth/fees.rs

@@ -126,7 +126,7 @@ impl FeeManager {
         // It's naturally impossible for base fee to be 0;
         // It means it was set by the user deliberately and therefore we treat it as a constant.
         // Therefore, we skip the base fee calculation altogether and we return 0.
-        if self.base_fee() == U256::ZERO {
+        if self.base_fee().is_zero() {
             return 0
         }
         calculate_next_block_base_fee(

crates/evm/core/src/fork/cache.rs

@@ -301,7 +301,7 @@ impl MemDb {
                     acc_storage.clear();
                 }
                 for (index, value) in acc.storage {
-                    if value.present_value() == U256::from(0) {
+                    if value.present_value().is_zero() {
                         acc_storage.remove(&index);
                     } else {
                         acc_storage.insert(index, value.present_value());

crates/evm/traces/src/lib.rs

@@ -7,7 +7,7 @@
 #[macro_use]
 extern crate tracing;
 
-use alloy_primitives::{LogData, U256};
+use alloy_primitives::LogData;
 use foundry_common::contracts::{ContractsByAddress, ContractsByArtifact};
 use foundry_evm_core::constants::CHEATCODE_ADDRESS;
 use futures::{future::BoxFuture, FutureExt};
@@ -200,7 +200,7 @@ pub async fn render_trace(
             "{addr}::{func_name}{opt_value}({inputs}){action}",
             addr = color.paint(decoded.label.as_deref().unwrap_or(&address)),
             func_name = color.paint(func_name),
-            opt_value = if trace.value == U256::ZERO {
+            opt_value = if trace.value.is_zero() {
                 String::new()
             } else {
                 format!("{{value: {}}}", trace.value)