fix: correct bytecode getters/setters

Whenever we output the bytecode of an account, whether to
a file or in a response, we need to return the *original*
bytecode using `Bytecode::len`, otherwise the bytecode
will differ depending on whether the bytecode has been
checked, analyzed or not.

anvil/src/eth/backend/mem/in_memory_db.rs

@@ -29,18 +29,17 @@ impl Db for MemDb {
             .clone()
             .into_iter()
             .map(|(k, v)| {
+                let code = v
+                    .info
+                    .code
+                    .unwrap_or_else(|| self.inner.code_by_hash(v.info.code_hash))
+                    .to_checked();
                 (
                     k,
                     SerializableAccountRecord {
                         nonce: v.info.nonce,
                         balance: v.info.balance,
-                        code: v
-                            .info
-                            .code
-                            .unwrap_or_else(|| self.inner.code_by_hash(v.info.code_hash))
-                            .bytes()
-                            .clone()
-                            .into(),
+                        code: code.bytes()[..code.len()].to_vec().into(),
                         storage: v.storage.into_iter().collect(),
                     },
                 )
@@ -207,7 +206,7 @@ mod tests {
             test_addr,
             SerializableAccountRecord {
                 balance: 100100.into(),
-                code: contract_code.bytes().clone().into(),
+                code: contract_code.bytes()[..contract_code.len()].to_vec().into(),
                 nonce: 100,
                 storage: new_storage,
             },

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

@@ -1095,11 +1095,11 @@ impl Backend {
             trace!(target: "backend", "get code for {:?}", address);
             let account = db.basic(address);
             let code = if let Some(code) = account.code {
-                code.bytes().clone().into()
+                code
             } else {
-                db.code_by_hash(account.code_hash).bytes().clone().into()
+                db.code_by_hash(account.code_hash)
             };
-            Ok(code)
+            Ok(code.bytes()[..code.len()].to_vec().into())
         })
     }