feat: mark_account_created (#441)

closes #418

cairo/ethereum/cancun/state.cairo

@@ -14,6 +14,8 @@ from ethereum.cancun.fork_types import (
     MappingBytes32U256,
     MappingBytes32U256Struct,
     Bytes32U256DictAccess,
+    SetAddressDictAccess,
+    SetAddressStruct,
 )
 from ethereum.cancun.trie import (
     TrieBytes32U256,
@@ -485,3 +487,33 @@ func is_account_empty{poseidon_ptr: PoseidonBuiltin*, state: State}(address: Add
     tempvar res = bool(1);
     return res;
 }
+
+func mark_account_created{poseidon_ptr: PoseidonBuiltin*, state: State}(address: Address) {
+    alloc_locals;
+
+    let created_accounts = state.value.created_accounts;
+
+    let fp_and_pc = get_fp_and_pc();
+    local __fp__: felt* = fp_and_pc.fp_val;
+
+    let set_dict_ptr = cast(created_accounts.value.dict_ptr, DictAccess*);
+    hashdict_write{poseidon_ptr=poseidon_ptr, dict_ptr=set_dict_ptr}(1, &address.value, 1);
+
+    // Rebind state
+    tempvar new_created_account = SetAddress(
+        new SetAddressStruct(
+            dict_ptr_start=created_accounts.value.dict_ptr_start,
+            dict_ptr=cast(set_dict_ptr, SetAddressDictAccess*),
+        ),
+    );
+    tempvar state = State(
+        new StateStruct(
+            _main_trie=state.value._main_trie,
+            _storage_tries=state.value._storage_tries,
+            _snapshots=state.value._snapshots,
+            created_accounts=new_created_account,
+        ),
+    );
+
+    return ();
+}

cairo/tests/ethereum/cancun/test_state.py

@@ -16,6 +16,7 @@
     get_storage,
     get_transient_storage,
     is_account_empty,
+    mark_account_created,
     set_account,
     set_storage,
     set_transient_storage,
@@ -100,6 +101,13 @@ def test_is_account_empty(self, cairo_run, data):
         assert result_cairo == is_account_empty(state, address)
         assert state_cairo == state
 
+    @given(data=state_and_address_and_optional_key())
+    def test_mark_account_created(self, cairo_run, data):
+        state, address = data
+        state_cairo = cairo_run("mark_account_created", state, address)
+        mark_account_created(state, address)
+        assert state_cairo == state
+
 
 class TestStateStorage:
     @given(data=state_and_address_and_optional_key(key_strategy=bytes32))