feat: vm.blobhashes

crates/cheatcodes/spec/src/vm.rs

@@ -321,6 +321,12 @@ interface Vm {
     #[cheatcode(group = Evm, safety = Unsafe)]
     function prevrandao(bytes32 newPrevrandao) external;
 
+    /// Sets the blobhashes in the transaction.
+    /// Not available on EVM versions before Cancun.
+    /// If used on unsupported EVM versions it will revert.
+    #[cheatcode(group = Evm, safety = Unsafe)]
+    function blobhashes(bytes32[] blobhashes) external;
+
     /// Sets `block.height`.
     #[cheatcode(group = Evm, safety = Unsafe)]
     function roll(uint256 newHeight) external;

crates/cheatcodes/src/evm.rs

@@ -261,6 +261,19 @@ impl Cheatcode for prevrandaoCall {
     }
 }
 
+impl Cheatcode for blobhashesCall {
+    fn apply_full<DB: DatabaseExt>(&self, ccx: &mut CheatsCtxt<DB>) -> Result {
+        let Self { blobhashes } = self;
+        ensure!(
+            ccx.data.env.cfg.spec_id >= SpecId::CANCUN,
+            "`blobhash` is not supported before the Cancun hard fork; \
+             see EIP-4844: https://eips.ethereum.org/EIPS/eip-4844"
+        );
+        ccx.data.env.tx.blob_hashes = blobhashes.clone();
+        Ok(Default::default())
+    }
+}
+
 impl Cheatcode for rollCall {
     fn apply_full<DB: DatabaseExt>(&self, ccx: &mut CheatsCtxt<DB>) -> Result {
         let Self { newHeight } = self;

crates/cheatcodes/src/evm/fork.rs

@@ -10,7 +10,6 @@ use foundry_evm_core::fork::CreateFork;
 
 impl Cheatcode for activeForkCall {
     fn apply_full<DB: DatabaseExt>(&self, ccx: &mut CheatsCtxt<DB>) -> Result {
-        let Self {} = self;
         ccx.data
             .db
             .active_fork_id()