chore: use is_zero directly (#8297)

Author: mattsse

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

@@ -1171,7 +1171,7 @@ impl Backend {
             optimism: OptimismFields { enveloped_tx: Some(Bytes::new()), ..Default::default() },
         };
 
-        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/otterscan/types.rs

@@ -297,7 +297,7 @@ impl OtsInternalOperation {
             .filter_map(|node| {
                 let r#type = match node.trace.kind {
                     _ if node.is_selfdestruct() => OtsInternalOperationType::SelfDestruct,
-                    CallKind::Call if node.trace.value != U256::ZERO => {
+                    CallKind::Call if !node.trace.value.is_zero() => {
                         OtsInternalOperationType::Transfer
                     }
                     CallKind::Create => OtsInternalOperationType::Create,