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Moved IWorld interpretation to a separate class
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| using System; | ||
| using System.Security.Cryptography; | ||
| using Bencodex.Types; | ||
| using Libplanet.Common; | ||
| using Libplanet.Store; | ||
| using Libplanet.Store.Trie; | ||
| using Libplanet.Types.Blocks; | ||
|
|
||
| namespace Libplanet.Action.State | ||
| { | ||
| internal static class IStateStoreExtensions | ||
| { | ||
| /// <summary> | ||
| /// Retrieves the <see cref="IWorld"/> associated with | ||
| /// given <paramref name="stateRootHash"/>. | ||
| /// </summary> | ||
| /// <param name="stateStore">The <see cref="IStateStore"/> to retrieve | ||
| /// an <see cref="IWorld"/> from.</param> | ||
| /// <param name="stateRootHash">The state root hash of the <see cref="IWorld"/> | ||
| /// to retrieve.</param> | ||
| /// <returns>The <see cref="IWorld"/> associated with | ||
| /// given <paramref name="stateRootHash"/>.</returns> | ||
| internal static IWorld GetWorld( | ||
| this IStateStore stateStore, | ||
| HashDigest<SHA256>? stateRootHash) | ||
| { | ||
| return new World( | ||
| new WorldBaseState(stateStore.GetStateRoot(stateRootHash), stateStore)); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Commits given <paramref name="world"/> to given <paramref name="stateStore"/>. | ||
| /// </summary> | ||
| /// <param name="stateStore">The <see cref="IStateStore"/> to commit | ||
| /// <paramref name="world"/> to.</param> | ||
| /// <param name="world">The <see cref="IWorld"/> to commit.</param> | ||
| /// <returns>The committed <see cref="IWorld"/>.</returns> | ||
| internal static IWorld CommitWorld(this IStateStore stateStore, IWorld world) | ||
| { | ||
| if (world.Version >= BlockMetadata.WorldStateProtocolVersion) | ||
| { | ||
| var worldTrie = world.Trie; | ||
| foreach (var account in world.Delta.Accounts) | ||
| { | ||
| var accountTrie = stateStore.Commit(account.Value.Trie); | ||
| worldTrie = worldTrie.Set( | ||
| KeyConverters.ToStateKey(account.Key), | ||
| new Binary(accountTrie.Hash.ByteArray)); | ||
| } | ||
|
|
||
| return new World( | ||
| new WorldBaseState(stateStore.Commit(worldTrie), stateStore)); | ||
| } | ||
| else | ||
| { | ||
| return new World( | ||
| new WorldBaseState( | ||
| stateStore.Commit(world.GetAccount(ReservedAddresses.LegacyAccount).Trie), | ||
| stateStore)); | ||
| } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Migrates given <paramref name="world"/> to <paramref name="targetVersion"/>. | ||
| /// </summary> | ||
| /// <param name="stateStore">The <see cref="IStateStore"/> to commit | ||
| /// the migrated <see cref="IWorld"/>.</param> | ||
| /// <param name="world">The <see cref="IWorld"/> to migrate.</param> | ||
| /// <param name="targetVersion">The target <see cref="IWorld"/> version | ||
| /// to migrate to.</param> | ||
| /// <returns>The migrated <see cref="IWorld"/> of <paramref name="world"/> with | ||
| /// <see cref="IWorld.Version"/> equal to: | ||
| /// <list type="bullet"> | ||
| /// <item><description> | ||
| /// zero if <paramref name="targetVersion"/> is less than | ||
| /// <see cref="BlockMetadata.WorldStateProtocolVersion"/>. | ||
| /// </description></item> | ||
| /// <item><description> | ||
| /// <paramref name="targetVersion"/> if <paramref name="targetVersion"/> is | ||
| /// greater than or equal to <see cref="BlockMetadata.WorldStateProtocolVersion"/>. | ||
| /// </description></item> | ||
| /// </list> | ||
| /// </returns> | ||
| /// <exception cref="ApplicationException">Thrown when <paramref name="targetVersion"/> is | ||
| /// lower than the <see cref="IWorld.Version"/> of <paramref name="world"/>.</exception> | ||
| /// <remarks> | ||
| /// Migrated <see cref="IWorld"/> is automatically committed before returning. | ||
| /// </remarks> | ||
| internal static IWorld MigrateWorld( | ||
| this IStateStore stateStore, | ||
| IWorld world, | ||
| int targetVersion) | ||
| { | ||
| if (world.Version > targetVersion) | ||
| { | ||
| throw new ApplicationException( | ||
| $"Given {nameof(world)} with version {world.Version} " + | ||
| $"cannot be migrated to a lower version {targetVersion}."); | ||
| } | ||
|
|
||
| // Migrate up to BlockMetadata.WorldStateProtocolVersion | ||
| // if conditions are met. | ||
| if (targetVersion >= BlockMetadata.WorldStateProtocolVersion && | ||
| world.Version < BlockMetadata.WorldStateProtocolVersion) | ||
| { | ||
| var worldTrie = stateStore.GetStateRoot(null); | ||
| worldTrie = worldTrie.SetMetadata( | ||
| new TrieMetadata(BlockMetadata.WorldStateProtocolVersion)); | ||
| worldTrie = worldTrie.Set( | ||
| KeyConverters.ToStateKey(ReservedAddresses.LegacyAccount), | ||
| new Binary(world.Trie.Hash.ByteArray)); | ||
| worldTrie = stateStore.Commit(worldTrie); | ||
| world = new World(new WorldBaseState(worldTrie, stateStore)); | ||
| } | ||
|
|
||
| // Migrate up to BlockMetadata.ValidatorSetAccountProtocolVersion | ||
| // if conditions are met. | ||
| if (targetVersion >= BlockMetadata.ValidatorSetAccountProtocolVersion && | ||
| world.Version < BlockMetadata.ValidatorSetAccountProtocolVersion) | ||
| { | ||
| var worldTrie = world.Trie; | ||
| worldTrie = worldTrie.SetMetadata( | ||
| new TrieMetadata(BlockMetadata.ValidatorSetAccountProtocolVersion)); | ||
| worldTrie = stateStore.Commit(worldTrie); | ||
| world = new World(new WorldBaseState(worldTrie, stateStore)); | ||
|
|
||
| var legacyAccountTrie = | ||
| world.GetAccount(ReservedAddresses.LegacyAccount).Trie; | ||
| IValue? rawValidatorSet = legacyAccountTrie.Get(KeyConverters.ValidatorSetKey); | ||
|
|
||
| // Move encoded validator set only if it already exists. | ||
| if (rawValidatorSet is { } rawValue) | ||
| { | ||
| legacyAccountTrie = legacyAccountTrie.Remove(KeyConverters.ValidatorSetKey); | ||
| legacyAccountTrie = stateStore.Commit(legacyAccountTrie); | ||
|
|
||
| var validatorSetAccountTrie = | ||
| world.GetAccount(ReservedAddresses.ValidatorSetAccount).Trie; | ||
| validatorSetAccountTrie = validatorSetAccountTrie.Set( | ||
| KeyConverters.ToStateKey(ValidatorSetAccount.ValidatorSetAddress), | ||
| rawValue); | ||
| validatorSetAccountTrie = stateStore.Commit(validatorSetAccountTrie); | ||
|
|
||
| worldTrie = worldTrie.Set( | ||
| KeyConverters.ToStateKey(ReservedAddresses.LegacyAccount), | ||
| new Binary(legacyAccountTrie.Hash.ByteArray)); | ||
| worldTrie = worldTrie.Set( | ||
| KeyConverters.ToStateKey(ReservedAddresses.ValidatorSetAccount), | ||
| new Binary(validatorSetAccountTrie.Hash.ByteArray)); | ||
| worldTrie = stateStore.Commit(worldTrie); | ||
| world = new World(new WorldBaseState(worldTrie, stateStore)); | ||
| } | ||
| } | ||
|
|
||
| // Migrate up to target version if conditions are met. | ||
| if (targetVersion >= BlockMetadata.WorldStateProtocolVersion && | ||
| world.Version < targetVersion) | ||
| { | ||
| var worldTrie = world.Trie; | ||
| worldTrie = worldTrie.SetMetadata(new TrieMetadata(targetVersion)); | ||
| worldTrie = stateStore.Commit(worldTrie); | ||
| world = new World(new WorldBaseState(worldTrie, stateStore)); | ||
| } | ||
|
|
||
| return world; | ||
| } | ||
| } | ||
| } |
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