implement EXTCODESIZE

Signed-off-by: xermicus <cyrill@parity.io>

crates/integration/src/cases.rs

@@ -1,4 +1,4 @@
-use alloy_primitives::{I256, U256};
+use alloy_primitives::{Address, I256, U256};
 use alloy_sol_types::{sol, SolCall, SolConstructor};
 
 use crate::mock_runtime::{CallOutput, State};
@@ -123,6 +123,12 @@ sol!(
     }
 );
 
+sol!(
+    contract ExtCode {
+        function ExtCodeSize(address who) public view returns (uint ret);
+    }
+);
+
 impl Contract {
     /// Execute the contract.
     ///
@@ -405,6 +411,18 @@ impl Contract {
             calldata: vec![0; 4],
         }
     }
+
+    pub fn ext_code_size(address: Address) -> Self {
+        let code = include_str!("../contracts/ExtCode.sol");
+        let name = "ExtCode";
+
+        Self {
+            name,
+            evm_runtime: crate::compile_evm_bin_runtime(name, code),
+            pvm_runtime: crate::compile_blob(name, code),
+            calldata: ExtCode::ExtCodeSizeCall::new((address,)).abi_encode(),
+        }
+    }
 }
 
 #[cfg(test)]