public async Task Get_storage()
{
IDbProvider dbProvider = await TestMemDbProvider.InitAsync();
/* all testing will be touching just a single storage cell */
StorageCell storageCell = new StorageCell(_address1, UInt256.One);
TrieStore trieStore = new TrieStore(dbProvider.StateDb, Logger);
StateProvider state = new StateProvider(trieStore, dbProvider.CodeDb, Logger);
StorageProvider storage = new StorageProvider(trieStore, state, Logger);
/* to start with we need to create an account that we will be setting storage at */
state.CreateAccount(storageCell.Address, UInt256.One);
state.Commit(MuirGlacier.Instance);
state.CommitTree(1);
/* at this stage we have an account with empty storage at the address that we want to test */
byte[] initialValue = new byte[] { 1, 2, 3 };
storage.Set(storageCell, initialValue);
storage.Commit();
storage.CommitTrees(2);
state.Commit(MuirGlacier.Instance);
state.CommitTree(2);
StateReader reader = new StateReader(
new TrieStore(dbProvider.StateDb, LimboLogs.Instance), dbProvider.CodeDb, Logger);
var account = reader.GetAccount(state.StateRoot, _address1);
var retrieved = reader.GetStorage(account.StorageRoot, storageCell.Index);
retrieved.Should().BeEquivalentTo(initialValue);
/* at this stage we set the value in storage to 1,2,3 at the tested storage cell */
/* Now we are testing scenario where the storage is being changed by the block processor.
* To do that we create some different storage / state access stack that represents the processor.
* It is a different stack of objects than the one that is used by the blockchain bridge. */
byte[] newValue = new byte[] { 1, 2, 3, 4, 5 };
StateProvider processorStateProvider =
new StateProvider(trieStore, new MemDb(), LimboLogs.Instance);
processorStateProvider.StateRoot = state.StateRoot;
StorageProvider processorStorageProvider =
new StorageProvider(trieStore, processorStateProvider, LimboLogs.Instance);
processorStorageProvider.Set(storageCell, newValue);
processorStorageProvider.Commit();
processorStorageProvider.CommitTrees(3);
processorStateProvider.Commit(MuirGlacier.Instance);
processorStateProvider.CommitTree(3);
/* At this stage the DB should have the storage value updated to 5.
* We will try to retrieve the value by taking the state root from the processor.*/
retrieved =
reader.GetStorage(processorStateProvider.GetStorageRoot(storageCell.Address), storageCell.Index);
retrieved.Should().BeEquivalentTo(newValue);
/* If it failed then it means that the blockchain bridge cached the previous call value */
}
