public void Idempotent()
{
// NOTE: This test checks that blocks can be evaluated idempotently. Also it checks
// the action results in pre-evaluation step and in evaluation step are equal.
const int repeatCount = 2;
var signer = new PrivateKey();
var timestamp = DateTimeOffset.UtcNow;
var txAddress = signer.ToAddress();
var txs = new[]
{
Transaction <RandomAction> .Create(
nonce : 0,
privateKey : signer,
genesisHash : null,
actions : new[] { new RandomAction(txAddress), }),
};
var stateStore = new TrieStateStore(new MemoryKeyValueStore());
HashAlgorithmGetter hashAlgorithmGetter = _ => HashAlgorithmType.Of <SHA256>();
PreEvaluationBlock <RandomAction> noStateRootBlock = MineGenesis(
hashAlgorithmGetter: hashAlgorithmGetter,
miner: GenesisMiner.PublicKey,
timestamp: timestamp,
transactions: txs
);
Block <RandomAction> stateRootBlock =
noStateRootBlock.Evaluate(GenesisMiner, null, stateStore);
var actionEvaluator =
new ActionEvaluator <RandomAction>(
hashAlgorithmGetter: hashAlgorithmGetter,
policyBlockAction: null,
stateGetter: ActionEvaluator <RandomAction> .NullStateGetter,
balanceGetter: ActionEvaluator <RandomAction> .NullBalanceGetter,
trieGetter: null);
var generatedRandomNumbers = new List <int>();
AssertPreEvaluationBlocksEqual(stateRootBlock, noStateRootBlock);
for (int i = 0; i < repeatCount; ++i)
{
var actionEvaluations = actionEvaluator.Evaluate(
noStateRootBlock,
StateCompleterSet <RandomAction> .Reject);
generatedRandomNumbers.Add(
(Integer)actionEvaluations[0].OutputStates.GetState(txAddress));
actionEvaluations = actionEvaluator.Evaluate(
stateRootBlock,
StateCompleterSet <RandomAction> .Reject);
generatedRandomNumbers.Add(
(Integer)actionEvaluations[0].OutputStates.GetState(txAddress));
}
for (int i = 1; i < generatedRandomNumbers.Count; ++i)
{
Assert.Equal(generatedRandomNumbers[0], generatedRandomNumbers[i]);
}
}
public void Evaluate()
{
Address address = _contents.Tx0InBlock1.Signer;
var blockAction = new SetStatesAtBlock(address, (Bencodex.Types.Integer) 123, 0);
var policy = new BlockPolicy <Arithmetic>(
blockAction: blockAction,
blockInterval: TimeSpan.FromMilliseconds(3 * 60 * 60 * 1000),
minimumDifficulty: 2,
difficultyStability: 1
);
var stagePolicy = new VolatileStagePolicy <Arithmetic>();
PreEvaluationBlock <Arithmetic> preEvalGenesis =
_contents.Genesis.Mine(policy.GetHashAlgorithm(0));
using (var fx = new DefaultStoreFixture())
{
Block <Arithmetic> genesis =
preEvalGenesis.Evaluate(_contents.GenesisKey, blockAction, fx.StateStore);
AssertPreEvaluationBlocksEqual(preEvalGenesis, genesis);
_output.WriteLine("#1: {0}", genesis);
var blockChain = new BlockChain <Arithmetic>(
policy,
stagePolicy,
fx.Store,
fx.StateStore,
genesis
);
AssertBencodexEqual((Bencodex.Types.Integer) 123, blockChain.GetState(address));
HashDigest <SHA256> identicalGenesisStateRootHash =
preEvalGenesis.DetermineStateRootHash(blockChain);
AssertBytesEqual(genesis.StateRootHash, identicalGenesisStateRootHash);
BlockContent <Arithmetic> content1 = _contents.Block1;
content1.PreviousHash = genesis.Hash;
content1.Difficulty = 2;
content1.Transactions = new[] { _contents.Tx0InBlock1 };
PreEvaluationBlock <Arithmetic> preEval1 = content1.Mine(policy.GetHashAlgorithm(1));
Block <Arithmetic> block1 = preEval1.Evaluate(_contents.Block1Key, blockChain);
AssertPreEvaluationBlocksEqual(preEval1, block1);
_output.WriteLine("#1: {0}", block1);
HashDigest <SHA256> identicalBlock1StateRootHash =
preEval1.DetermineStateRootHash(blockChain);
AssertBytesEqual(block1.StateRootHash, identicalBlock1StateRootHash);
blockChain.Append(block1);
AssertBencodexEqual((Bencodex.Types.Integer) 158, blockChain.GetState(address));
}
}
public static BlockChain <T> MakeBlockChain <T>(
IBlockPolicy <T> policy,
IStore store,
IStateStore stateStore,
IEnumerable <T> actions = null,
PrivateKey privateKey = null,
DateTimeOffset?timestamp = null,
IEnumerable <IRenderer <T> > renderers = null,
Block <T> genesisBlock = null,
int protocolVersion = Block <T> .CurrentProtocolVersion
)
where T : IAction, new()
{
actions = actions ?? ImmutableArray <T> .Empty;
privateKey = privateKey ?? ChainPrivateKey;
var tx = Transaction <T> .Create(
0,
privateKey,
null,
actions,
timestamp : timestamp ?? DateTimeOffset.MinValue);
if (genesisBlock is null)
{
var content = new BlockContent <T>()
{
Miner = GenesisMiner.ToAddress(),
PublicKey = protocolVersion < 2 ? null : GenesisMiner.PublicKey,
Timestamp = timestamp ?? DateTimeOffset.MinValue,
Transactions = new[] { tx },
ProtocolVersion = protocolVersion,
};
var preEval = new PreEvaluationBlock <T>(
content,
policy.GetHashAlgorithm(0),
new Nonce(new byte[] { 0x01, 0x00, 0x00, 0x00 })
);
genesisBlock = protocolVersion < 2
? new Block <T>(
preEval,
preEval.DetermineStateRootHash(policy.BlockAction, stateStore),
signature: null)
: preEval.Evaluate(GenesisMiner, policy.BlockAction, stateStore);
}
ValidatingActionRenderer <T> validator = null;
#pragma warning disable S1121
var chain = new BlockChain <T>(
policy,
new VolatileStagePolicy <T>(),
store,
stateStore,
genesisBlock,
renderers: renderers ?? new[] { validator = new ValidatingActionRenderer <T>() }
);
#pragma warning restore S1121
if (validator != null)
{
validator.BlockChain = chain;
}
return(chain);
}