[refactor]: update executor source code

Signed-off-by: Marin Veršić <[email protected]>

modules/client/src/test/executor/src/lib.rs

@@ -0,0 +1,61 @@
+//! Runtime Executor for client tests
+#![no_std]
+
+extern crate alloc;
+#[cfg(not(test))]
+extern crate panic_halt;
+
+use alloc::borrow::ToOwned as _;
+
+use iroha_executor::{default::default_permission_token_schema, prelude::*, smart_contract};
+use lol_alloc::{FreeListAllocator, LockedAllocator};
+
+#[global_allocator]
+static ALLOC: LockedAllocator<FreeListAllocator> = LockedAllocator::new(FreeListAllocator::new());
+
+/// Executor that replaces some of [`Validate`]'s methods with sensible defaults
+///
+/// # Warning
+///
+/// The defaults are not guaranteed to be stable.
+#[derive(Clone, Constructor, Debug, ValidateEntrypoints, ExpressionEvaluator, Validate, Visit)]
+pub struct Executor {
+    verdict: Result,
+    block_height: u64,
+    host: smart_contract::Host,
+}
+
+impl Executor {
+    fn ensure_genesis(block_height: u64) -> MigrationResult {
+        if block_height != 0 {
+            return Err("Default Executor is intended to be used only in genesis. \
+                 Write your own executor if you need to upgrade executor on existing chain."
+                .to_owned());
+        }
+
+        Ok(())
+    }
+}
+
+/// Migrate previous executor to the current version.
+/// Called by Iroha once just before upgrading executor.
+///
+/// # Errors
+///
+/// Concrete errors are specific to the implementation.
+///
+/// If `migrate()` entrypoint fails then the whole `Upgrade` instruction
+/// will be denied and previous executor will stay unchanged.
+#[entrypoint]
+pub fn migrate(block_height: u64) -> MigrationResult {
+    Executor::ensure_genesis(block_height)?;
+
+    let schema = default_permission_token_schema();
+    let (token_ids, schema_str) = schema.serialize();
+    iroha_executor::set_permission_token_schema(
+        &iroha_executor::data_model::permission::PermissionTokenSchema::new(token_ids, schema_str),
+    );
+
+    Ok(())
+}
+