prevent balance overflow in anvil_addBalance (foundry-rs#13457)

DanielGuupta · mattsse · web-flow · commit 94d1caab9fef · 2026-02-17T10:38:31.000+01:00
Co-authored-by: Matthias Seitz &lt;matthias.seitz@outlook.de&gt;
diff --git a/crates/anvil/src/eth/api.rs b/crates/anvil/src/eth/api.rs
@@ -2184,7 +2184,7 @@ impl EthApi {
     pub async fn anvil_add_balance(&self, address: Address, balance: U256) -> Result<()> {
         node_info!("anvil_addBalance");
         let current_balance = self.backend.get_balance(address, None).await?;
-        self.backend.set_balance(address, current_balance + balance).await?;
+        self.backend.set_balance(address, current_balance.saturating_add(balance)).await?;
         Ok(())
     }
 
diff --git a/crates/anvil/tests/it/traces.rs b/crates/anvil/tests/it/traces.rs
@@ -1243,7 +1243,7 @@ async fn test_debug_trace_transaction_pre_state_tracer() {
     "nonce": 1
   },
   "0x70997970c51812dc3a010c7d01b50e0d17dc79c8": {
-    "balance": "0x56bc75e2d630fffff"
+    "balance": "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
   },
   "0xe7f1725e7734ce288f8367e1bb143e90bb3f0512": {
     "balance": "0x0",

Original file line number	Diff line number	Diff line change
`@@ -2184,7 +2184,7 @@ impl EthApi {`
`2184`	`2184`	`pub async fn anvil_add_balance(&self, address: Address, balance: U256) -> Result<()> {`
`2185`	`2185`	`node_info!("anvil_addBalance");`
`2186`	`2186`	`let current_balance = self.backend.get_balance(address, None).await?;`
`2187`		`- self.backend.set_balance(address, current_balance + balance).await?;`
	`2187`	`+ self.backend.set_balance(address, current_balance.saturating_add(balance)).await?;`
`2188`	`2188`	`Ok(())`
`2189`	`2189`	`}`
`2190`	`2190`