Change magic bytes functional test

node-lib/src/regtest_options.rs

@@ -28,6 +28,10 @@ pub struct RegtestOptions {
 
 #[derive(Args, Clone, Debug)]
 pub struct ChainConfigOptions {
+    /// Magic bytes.
+    #[clap(long)]
+    pub chain_magic_bytes: Option<String>,
+
     /// The maximum future block offset in seconds.
     #[clap(long)]
     pub chain_max_future_block_time_offset: Option<u64>,

node-lib/src/runner.rs

@@ -23,7 +23,7 @@ use std::{
     time::Duration,
 };
 
-use anyhow::{anyhow, Context, Result};
+use anyhow::{anyhow, ensure, Context, Result};
 use blockprod::rpc::BlockProductionRpcServer;
 use chainstate_launcher::StorageBackendConfig;
 use paste::paste;
@@ -331,6 +331,7 @@ fn regtest_chain_config(command: &Command, options: &ChainConfigOptions) -> Resu
     };
 
     let ChainConfigOptions {
+        chain_magic_bytes,
         chain_max_future_block_time_offset,
         chain_version,
         chain_target_block_spacing,
@@ -365,6 +366,15 @@ fn regtest_chain_config(command: &Command, options: &ChainConfigOptions) -> Resu
         };
     }
 
+    let magic_bytes_from_string = |magic_string: String| -> Result<[u8; 4]> {
+        ensure!(magic_string.len() == 4, "Invalid size of magic_bytes");
+        let mut result: [u8; 4] = [0; 4];
+        for (i, byte) in magic_string.bytes().enumerate() {
+            result[i] = byte;
+        }
+        Ok(result)
+    };
+    update_builder!(magic_bytes, magic_bytes_from_string, map_err);
     update_builder!(max_future_block_time_offset, Duration::from_secs);
     update_builder!(version, SemVer::try_from, map_err);
     update_builder!(target_block_spacing, Duration::from_secs);

test/functional/feature_db_reinit.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+#  Copyright (c) 2023 RBB S.r.l
+#  [email protected]
+#  SPDX-License-Identifier: MIT
+#  Licensed under the MIT License;
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#  https://github.com/mintlayer/mintlayer-core/blob/master/LICENSE
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+from scalecodec.base import RuntimeConfiguration
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+    assert_equal,
+)
+
+block_input_data_obj = RuntimeConfiguration().create_scale_object('GenerateBlockInputData')
+
+
+class RestartWithDifferentMagicBytes(BitcoinTestFramework):
+    def set_test_params(self):
+        self.setup_clean_chain = True
+        self.num_nodes = 1
+        self.extra_args = [[
+            "--blockprod-min-peers-to-produce-blocks=0"
+        ]]
+
+    def run_test(self):
+        # generate and process block to update chainstate db
+        block_input_data = block_input_data_obj.encode({"PoW": {"reward_destination": "AnyoneCanSpend"}}
+                                                       ).to_hex()[2:]
+
+        block = self.nodes[0].blockprod_generate_block(block_input_data, [])
+        self.nodes[0].chainstate_submit_block(block)
+
+        tip_height = self.nodes[0].chainstate_best_block_height()
+        assert_equal(1, tip_height)
+
+        # restart the node and check that the db hasn't changed
+        self.restart_node(0)
+        tip_height = self.nodes[0].chainstate_best_block_height()
+        assert_equal(1, tip_height)
+
+        # restart the node with different magic bytes and check that db was cleaned up
+        self.restart_node(0, extra_args=["--chain-magic-bytes=ffff"])
+        tip_height = self.nodes[0].chainstate_best_block_height()
+        assert_equal(0, tip_height)
+
+
+if __name__ == '__main__':
+    RestartWithDifferentMagicBytes().main()

test/functional/test_runner.py

@@ -109,6 +109,7 @@ class UnicodeOnWindowsError(ValueError):
     'p2p_submit_orphan.py',
     'p2p_syncing_test.py',
     'p2p_relay_transactions.py',
+    'feature_db_reinit.py',
     'feature_lmdb_backend_test.py',
     'mempool_basic_reorg.py',
     'mempool_eviction.py',