Collect different nodes between two state root hashes #1023

moreal · 2020-09-29T05:35:46Z

In this pull request, it introduced a new planet CLI feature to compare two trees via root hash.

dahlia · 2020-09-29T05:36:46Z

Libplanet/Store/Trie/Nodes/INode.cs

@@ -3,7 +3,7 @@

 namespace Libplanet.Store.Trie.Nodes
 {
-    internal interface INode
+    public interface INode


Could you add an XML comment here?

I reverted INode's access modifier into internal again.

dahlia · 2020-09-29T05:36:53Z

Libplanet/Store/Trie/ITrie.cs

@@ -4,7 +4,7 @@

 namespace Libplanet.Store.Trie
 {
-    internal interface ITrie
+    public interface ITrie


Could you add an XML comment here?

I added it in db620fa.

dahlia · 2020-09-29T05:36:57Z

Libplanet/Store/Trie/MerkleTrie.cs

@@ -12,7 +12,7 @@ namespace Libplanet.Store.Trie
 {
    // TODO: implement 'logs' for debugging.
    [Equals]
-    internal class MerkleTrie : ITrie
+    public class MerkleTrie : ITrie


Could you add an XML comment here?

I added it in db620fa.

dahlia · 2020-09-29T05:37:06Z

Libplanet/Store/Trie/MerkleTrieExtensions.cs

+
+namespace Libplanet.Store.Trie
+{
+    public static class MerkleTrieExtensions


Could you add an XML comment here?

I added it in db620fa.

codecov · 2020-09-29T10:32:39Z

Codecov Report

Merging #1023 into main will increase coverage by 0.18%.
The diff coverage is 94.65%.

@@            Coverage Diff             @@
##             main    #1023      +/-   ##
==========================================
+ Coverage   88.24%   88.43%   +0.18%     
==========================================
  Files         331      334       +3     
  Lines       30245    30341      +96     
==========================================
+ Hits        26691    26831     +140     
+ Misses       1942     1902      -40     
+ Partials     1612     1608       -4

Impacted Files	Coverage Δ
Libplanet/Store/Trie/MerkleTrieExtensions.cs	`81.25% <81.25%> (ø)`
Libplanet/Store/Trie/MerkleTrie.cs	`91.82% <96.87%> (+2.15%)`	⬆️
...lanet.Tests/Store/Trie/MerkleTrieExtensionsTest.cs	`100.00% <100.00%> (ø)`
Libplanet.Tests/Store/Trie/MerkleTrieTest.cs	`100.00% <100.00%> (ø)`
Libplanet/Net/Protocols/KademliaProtocol.cs	`79.36% <100.00%> (-0.47%)`	⬇️
Libplanet/Net/Protocols/RoutingTable.cs	`92.36% <100.00%> (+0.05%)`	⬆️
... and 5 more

dahlia · 2020-10-05T10:41:15Z

Libplanet/Store/Trie/ITrie.cs

@@ -4,7 +4,11 @@

 namespace Libplanet.Store.Trie
 {
-    internal interface ITrie
+    /// <summary>
+    /// A interface for <see href="https://en.wikipedia.org/wiki/Merkle_tree">Merkle Tree</see>.


Suggested change

/// A interface for <see href="https://en.wikipedia.org/wiki/Merkle_tree">Merkle Tree</see>.

/// An interface for <see href="https://en.wikipedia.org/wiki/Merkle_tree">Merkle Tree</see>.

dahlia · 2020-10-05T10:42:54Z

Libplanet/Store/Trie/MerkleTrie.cs

+        /// <param name="rootHash">The root hash of <see cref="MerkleTrie"/>.
+        /// <seealso cref="ITrie.Hash"/>.</param>


AFAIK <seealso> cannot be appeared inside <param>.

Suggested change

/// <param name="rootHash">The root hash of <see cref="MerkleTrie"/>.

/// <seealso cref="ITrie.Hash"/>.</param>

/// <param name="rootHash">The root <see cref="ITrie.Hash"/> of

/// <see cref="MerkleTrie"/>.</param>

dahlia · 2020-10-05T10:49:36Z

Libplanet/Store/Trie/MerkleTrie.cs

+        /// <param name="secure">The flag to determine to use <see cref="MerkleTrie"/> in secure
+        /// mode. If it is true, <see cref="MerkleTrie"/> will stores the value with the hashed
+        /// result from the given key as the key. It will hash with
+        /// <see cref="Hashcash.Hash"/>.</param>


Suggested change

/// <param name="secure">The flag to determine to use <see cref="MerkleTrie"/> in secure

/// mode. If it is true, <see cref="MerkleTrie"/> will stores the value with the hashed

/// result from the given key as the key. It will hash with

/// <see cref="Hashcash.Hash"/>.</param>

/// <param name="secure">The flag to determine whether to use <see cref="MerkleTrie"/> in

/// secure mode. If it is turned on, <see cref="MerkleTrie"/> internally stores hashed keys

/// instead of bare keys. <see cref="Hashcash.Hash"/> is used to hash them.</param>

dahlia · 2020-10-05T10:50:13Z

Libplanet/Store/Trie/MerkleTrieExtensions.cs

+        /// </summary>
+        /// <param name="origin">A trie to compare.</param>
+        /// <param name="other">An other trie to compare.</param>
+        /// <returns>A <see cref="IGrouping{TKey,TElement}"/>s,


Suggested change

/// <returns>A <see cref="IGrouping{TKey,TElement}"/>s,

/// <returns><see cref="IGrouping{TKey,TElement}"/>s,

dahlia · 2020-10-05T10:52:27Z

Libplanet.Tools/Mpt.cs

+{
+    public class Mpt
+    {
+        [Command(Description = "Compare two ")]


Compare two… what?

I forgot to fill it, sorry 😢 Thank you 🙏

dahlia · 2020-10-05T11:12:43Z

Libplanet.Tools/Mpt.cs

+            switch (keyValueStoreType)
+            {
+                case "rocksdb":
+                    return new RocksDBKeyValueStore(keyValueStorePath);
+                case "default":
+                    return new RocksDBKeyValueStore(keyValueStorePath);
+                default:
+                    throw new CommandExitedException(
+                        $"The given {nameof(keyValueStoreType)}," +
+                        $" {keyValueStorePath} is not supported.",
+                        -1);
+            }


Rather than using switch statement, how about maintaining a read-only static IImmutableDictionary<string, Func<string, IKeyValueStore>>? It would be useful to show all available options in error/help messages.

Plus, the error message would better if it is like:

There is no such type for -t/--kv-store-type: {kvStoreType}. Available options are: rocksdb, default.

dahlia · 2020-10-05T11:15:06Z

Libplanet.Tools/Mpt.cs

+            [Option]
+            string keyValueStoreType,


This option name is too long. It should have a short name (e.g., -t) as well.

Also how about renaming it to kvStoreType?

dahlia · 2020-10-05T11:15:58Z

Libplanet.Tools/Mpt.cs

+            [Argument(Name = "KEY-VALUE-STORE-PATH")]
+            string keyValueStorePath,
+            [Argument(Name = "STATE-ROOT-HASH")]
+            string stateRootHashHex,
+            [Argument(Name = "OTHER-STATE-ROOT-HASH")]
+            string otherStateRootHashHex,
+            [Option]
+            string keyValueStoreType,
+            [Option]
+            bool secure = false)


Could you give these Arguments and Options their own Description?

dahlia · 2020-10-05T11:17:45Z

Libplanet.Tools/Mpt.cs

+        [Command(Description = "Compare two ")]
+        public void Diff(
+            [Argument(Name = "KEY-VALUE-STORE-PATH")]
+            string keyValueStorePath,


How about renaming it to kvStorePath?

dahlia · 2020-10-05T11:37:44Z

Libplanet.Tools/Program.cs

@@ -5,6 +5,7 @@ namespace Libplanet.Tools
 {
    [HasSubCommands(typeof(Apv), Description = "App protocol version utilities.")]
    [HasSubCommands(typeof(Key), Description = "Manage private keys.")]
+    [HasSubCommands(typeof(Mpt), Description = "Merkle Trie utilities.")]


It's a trivia but: even though the sub-command mpt has a P in its name, the description doesn't mention Patricia.

moreal · 2020-10-06T04:00:37Z

@dahlia I applied for your reviews. Please review these again. Also, I am not sure the usage of Argument and Option was well. In other words, it is about what parameter should be Argument and what parameter should be Option. Could you leave your opinion about it? 🙏

dahlia

Also, I am not sure the usage of Argument and Option was well. In other words, it is about what parameter should be Argument and what parameter should be Option. Could you leave your opinion about it? 🙏

A rule of thumb is: required values should be arguments and optional values should be options. However, this rule would not be that helpful for this situation.

The reason why the current design of planet mpt diff command seems complicated is that it takes too many values and they are all required. What I want to suggest are:

Merge path and store type into one. URI-like string would work (IMHO), e.g., rocksdb+file:///home/user/somewhere. Falling back scheme-less URI (i.e., local path) to default+file:// might be nice to have.

Manage stores in the same manner to how git remote are managed. E.g.:

$ planet mpt add somewhere rocksdb+file:///home/user/somewhere
$ planet mpt diff somewhere root-a root-b

As like git pull or git push do, planet mpt diff should be able to take a bare URI besides a registered store name, e.g.:
```
$ planet mpt diff rocksdb+file:///home/user/somewhere root-a root-b
```

dahlia · 2020-10-06T05:33:17Z

Libplanet.Tools/Libplanet.Tools.csproj

-    <PackageReference
-      Include="Microsoft.DotNet.Analyzers.Compatibility"
-      Version="0.2.12-alpha">
+    <PackageReference Include="Microsoft.DotNet.Analyzers.Compatibility" Version="0.2.12-alpha">


Apparently unnecessary…

dahlia · 2020-10-06T05:33:45Z

Libplanet.Tools/Libplanet.Tools.csproj

-  <PropertyGroup Condition=" '$(PublishSingleFile)' == 'true' And
-                             '$(RuntimeIdentifier.Substring(0, 6))' == 'linux-' ">
+  <PropertyGroup Condition=" '$(PublishSingleFile)' == 'true' And&#xA;                             '$(RuntimeIdentifier.Substring(0, 6))' == 'linux-' ">


Apparently unnecessary…

dahlia · 2020-10-06T07:21:34Z

Libplanet.Tools/Mpt.cs

+                ImmutableSortedDictionary<string, Func<string, IKeyValueStore>>.Empty
+                    .Add("default", kvStorePath => new DefaultKeyValueStore(kvStorePath))
+                    .Add("rocksdb", kvStorePath => new RocksDBKeyValueStore(kvStorePath));


How about using a dictionary literal and immediately calling its .ToImmutableSortedDictionary() method? That would be more readable.

dahlia · 2020-10-06T07:27:51Z

Libplanet.Tools/Mpt.cs

+                't',
+                Description = "The type of the key-value store stored" +
+                              " at the given KEY-VALUE-STORE-PATH argument. " +
+                              "It should be among in 'default' or 'rocksdb'.")]


As it's code duplication (the same keys are appeared twice in this file), it might be better to have a separated command to list all available choices, and mention the command here… but I am not sure.

Anyway, I wrote a feature request which address this kind of problem to Cocona: mayuki/Cocona#27.

dahlia · 2020-10-06T07:33:47Z

Libplanet/Store/Trie/MerkleTrie.cs

+        /// nodes.</param>
+        /// <param name="rootHash">The root <see cref="ITrie.Hash"/> of
+        /// <see cref="MerkleTrie"/>.</param>
+        /// <param name="secure">The flag to determine to use <see cref="MerkleTrie"/> in


Suggested change

/// <param name="secure">The flag to determine to use <see cref="MerkleTrie"/> in

/// <param name="secure">Whether to use <see cref="MerkleTrie"/> in

dahlia · 2020-10-06T07:43:49Z

Libplanet/Store/Trie/MerkleTrieExtensions.cs

+    public static class MerkleTrieExtensions
+    {
+        /// <summary>
+        /// Compare two given tries and get different value nodes (leaf node).


.NET docs apparently prefer third-person singular verbs. Here's an unofficial guide for docs style:

Consider using third person singular verb to start the summary of members.

Suggested change

/// Compare two given tries and get different value nodes (leaf node).

/// Compares two given tries and gets different value nodes (leaf node).

Also, it separates the steps of usage like `git-remote`. Co-Authored-By: Hong Minhee <hong.minhee@gmail.com>

moreal · 2020-10-07T06:50:59Z

@dahlia I tried to implement your suggestions. After it, it became cool to use. 🙏

> planet mpt diff "9c-beta-7-rc9-2" "e682848e718ffab0135335d69c56b26e61d6ac6aacca61d13f87b826a211ef28" "b28b1971110e12
4667f3682233d4901766fdb48dc7c9e05da184cc7713552f8c"

There are some points to fix in CLI (e.g, Checks there is already the alias name, Refactoring, etc...) yet. But you can review other points about code quality and pattern like 'Dependency Injection Pattern was organized well' if you have free of your time.

I would like to thank you again for your good suggestions.

dahlia · 2020-10-07T06:59:25Z

Libplanet.Tools/Mpt.cs

+                var exceptionMessage = "The scheme must be explicit and must be formatted with " +
+                                       "two methods, '<kv-store-type>' or " +
+                                       "'<kv-store-type>+<uri-scheme>'.";


I think this message would be enough:

A key-value store URI must have a scheme, e.g., default://, rocksdb+file://.

dahlia · 2020-10-07T07:01:28Z

Libplanet.Tools/Mpt.cs

+                splitScheme[0], ignoreCase: true, out KVStoreType kvStoreType))
+            {
+                throw new NotSupportedException(
+                    $"There is no supported kv-store-type for '{splitScheme[0]}'");


How about this:

No key-value store backend supports the such scheme: {splitScheme[0]}.

dahlia · 2020-10-07T07:02:05Z

Libplanet.Tools/Mpt.cs

+                && !SchemeType.TryParse(splitScheme[1], ignoreCase: true, out schemeType))
+            {
+                throw new NotSupportedException(
+                    $"There is no supported scheme type for '{splitScheme[1]}'");


About a term, one thing I want to suggest is: how about using the term backend instead of type?

How about this:

No key-value store backend supports the such scheme: {splitScheme[1]}.

dahlia · 2020-10-07T07:08:57Z

Libplanet.Tools/FileConfigurationService.cs

+                throw new KeyNotFoundException($"The given key, '{key}' does not exist.");
+            }
+
+            return _fileSystem.ReadAllText(KeyPath(key));


Rather than implementing key-value configuration using multiple files (where filenames are keys), IMHO it's more handy to maintain a single JSON/YAML/TOML file.

It would be okay with any format at this moment, because we can change the format before releasing v0.10.0. So the easiest one to implement it. Or leave a FIXME comment and file an issue addressing this and let's move fast.

I tried to find ways to stay it now interface and to maintain with JSON. But it was hard to use strict type because they must be Dictionary<string, object> type. So I introduced a new ToolConfiguration struct class and changed the IConfigurationService interface. Now the interface provides methods only Load and Store. Another instruction can proceed like handling a struct variable, with strict type 😀

Now, it is maintained on JSON.

dahlia · 2020-10-07T07:15:30Z

Libplanet.Tools/Mpt.cs

+                    $"There is no supported scheme type for '{splitScheme[1]}'");
+            }
+
+            return (kvStoreType, schemeType, uri.AbsolutePath);


Why do we need KVStoreType thing and LoadKeyValueStore() method? Can't we make this ParseKVStoreURI() method to directory return IKeyValueStore instead of KVStoreType?

I understood your comment as that let us merge a function to parse and another function to load kv-store into one. Then the method ParseKVStoreURI() will be return a single value typed IKeyValueStore not tuple, right?

Yes, that's what I mean.

Co-Authored-By: Hong Minhee <hong.minhee@gmail.com>

moreal · 2020-10-08T10:33:51Z

@dahlia I applied your suggestions. You can review these again! 🙏

dahlia

It's been long… and I believe it's my last review. Also you should add changelogs about the CLI tools (there's the section in the CHANGES.md file), e.g.:

 -   Added a new sub-command `planet mpt`.
 -   Introduced a configuration file.  It's placed in:
      -  Linux/macOS: *<var>$XDG_CONFIG_HOME</var>/planetarium/cli.json*
      -  Windows: *<var>%AppData%</var>\planetarium\cli.json*

dahlia · 2020-10-08T12:25:39Z

Libplanet.Tools/Program.cs

+        private static readonly string FileConfigurationServiceRoot = Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+            "planetarium",
+            "planet");


How about this (which is parallel with @planetarium/cli on npm)?

Suggested change

"planet");

"cli.json");

Co-Authored-By: Hong Minhee <hong.minhee@gmail.com>

dahlia

Good job!

moreal · 2020-10-12T01:25:03Z

Could you review this pull request? @planetarium/libplanet

earlbread · 2020-10-12T01:43:25Z

Libplanet/Store/Trie/MerkleTrieExtensions.cs

+            for (int i = 0; i < bytes.Length / 2; ++i)
+            {
+                byte high = bytes[i * 2], low = bytes[i * 2 + 1];
+                if (high < 0 || high >= 16)


Isn't high >= 16 enough because high and low couldn't be lower than 0?

Yes, I realized byte of C# is unsigned but I forgot. I will amend 🙏

I amended it in 126f439. 🙏

earlbread · 2020-10-12T01:48:51Z

Libplanet/Store/Trie/MerkleTrie.cs

-                yield return hashNode.HashDigest;
-                INode? node = GetNode(hashNode.HashDigest);
+                (INode node, ImmutableArray<byte> path) = queue.Dequeue();
+                yield return (node, path);
                switch (node)
                {
                    case FullNode fullNode:
                        IEnumerable<HashNode> childHashNodes = fullNode.Children.OfType<HashNode>();


This doesn't seem to be used.

I amended it in 5fdd86b. 🙏

Co-Authored-By: Seunghun Lee <waydi1@gmail.com>

The `byte` type of C#, is same with `unsigned byte` in other languages. So it is useless comparison to check it is less than 0. Co-Authored-By: Seunghun Lee <waydi1@gmail.com>

Libplanet/Store/Trie/MerkleTrieExtensions.cs

dahlia reviewed Sep 29, 2020

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moreal force-pushed the feature/trie-diff branch 4 times, most recently from ac8fe6b to 3068723 Compare September 29, 2020 10:22

moreal marked this pull request as ready for review October 5, 2020 10:31

auto-assign bot requested review from dahlia, earlbread, limebell, longfin and riemannulus October 5, 2020 10:31

auto-assign bot assigned moreal Oct 5, 2020

dahlia reviewed Oct 5, 2020

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moreal requested a review from dahlia October 6, 2020 02:16

moreal force-pushed the feature/trie-diff branch 2 times, most recently from ce847a0 to 5b636d3 Compare October 6, 2020 03:23

moreal added storage Related to storage (Libplanet.Store) tools Related to CLI tools (Libplanet.Tools) labels Oct 6, 2020

riemannulus previously approved these changes Oct 6, 2020

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moreal dismissed stale reviews from longfin and riemannulus via 78be0ba October 6, 2020 05:24

moreal force-pushed the feature/trie-diff branch from f5a6484 to 78be0ba Compare October 6, 2020 05:24

moreal mentioned this pull request Oct 6, 2020

Export all states as JSON #1026

Merged

dahlia reviewed Oct 6, 2020

View reviewed changes

moreal added 3 commits October 6, 2020 18:38

feat(mpt): implement DifferentNodes extension

877dcf8

docs: make up for some missing documents

f61a940

feat(cli): implement mpt-diff

7931d02

feat(cli): merge kv-store type to a URI

61e89d7

Also, it separates the steps of usage like `git-remote`. Co-Authored-By: Hong Minhee <hong.minhee@gmail.com>

dahlia reviewed Oct 7, 2020

View reviewed changes

moreal and others added 3 commits October 8, 2020 14:27

refactor: update exception messages

dd3d2ae

Co-Authored-By: Hong Minhee <hong.minhee@gmail.com>

feat(cli): introduce configuration class for strict typing

1a694a5

feat(cli): redesign configuration service

26b8eb5

moreal requested review from dahlia, longfin and riemannulus October 8, 2020 10:34

dahlia reviewed Oct 8, 2020

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moreal and others added 3 commits October 8, 2020 22:13

refactor(cli): receive full path of configuration file

87d0a3a

refactor(cli): rename configuration filename

902ed9d

Co-Authored-By: Hong Minhee <hong.minhee@gmail.com>

docs: update changelog

0427b73

Co-Authored-By: Hong Minhee <hong.minhee@gmail.com>

moreal force-pushed the feature/trie-diff branch from f108a17 to 0427b73 Compare October 8, 2020 13:26

moreal requested a review from dahlia October 8, 2020 13:33

dahlia previously approved these changes Oct 8, 2020

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earlbread previously approved these changes Oct 12, 2020

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moreal and others added 2 commits October 12, 2020 11:03

refactor: remove unused variable

5fdd86b

Co-Authored-By: Seunghun Lee <waydi1@gmail.com>

refactor: remove useless comparison

126f439

The `byte` type of C#, is same with `unsigned byte` in other languages. So it is useless comparison to check it is less than 0. Co-Authored-By: Seunghun Lee <waydi1@gmail.com>

moreal dismissed stale reviews from earlbread and dahlia via 126f439 October 12, 2020 02:04

moreal requested review from dahlia and earlbread October 12, 2020 02:04

earlbread approved these changes Oct 12, 2020

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riemannulus reviewed Oct 12, 2020

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Libplanet/Store/Trie/MerkleTrieExtensions.cs Outdated Show resolved Hide resolved

riemannulus approved these changes Oct 12, 2020

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moreal merged commit 9ce85cd into planetarium:main Oct 12, 2020

dahlia mentioned this pull request May 13, 2022

Make a pair of (IStore, IStateStore) referrable by a simple string (preferrably URI) #1953

Closed

	/// A interface for <see href="https://en.wikipedia.org/wiki/Merkle_tree">Merkle Tree</see>.
	/// An interface for <see href="https://en.wikipedia.org/wiki/Merkle_tree">Merkle Tree</see>.

		/// <param name="rootHash">The root hash of <see cref="MerkleTrie"/>.
		/// <seealso cref="ITrie.Hash"/>.</param>

	/// <returns>A <see cref="IGrouping{TKey,TElement}"/>s,
	/// <returns><see cref="IGrouping{TKey,TElement}"/>s,

	/// <param name="secure">The flag to determine to use <see cref="MerkleTrie"/> in
	/// <param name="secure">Whether to use <see cref="MerkleTrie"/> in

	/// Compare two given tries and get different value nodes (leaf node).
	/// Compares two given tries and gets different value nodes (leaf node).

Collect different nodes between two state root hashes #1023

Collect different nodes between two state root hashes #1023

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