async Task <UInt256> SubmitTransactionAsync(Transaction tx)
{
if (disposedValue)
{
throw new ObjectDisposedException(nameof(OfflineNode));
}
var transactions = new[] { tx };
// Verify the provided transactions. When running, Blockchain class does verification in two steps: VerifyStateIndependent and VerifyStateDependent.
// However, Verify does both parts and there's no point in verifying dependent/independent in separate steps here
var verificationContext = new TransactionVerificationContext();
for (int i = 0; i < transactions.Length; i++)
{
if (transactions[i].Verify(neoSystem.Settings, neoSystem.StoreView, verificationContext) != VerifyResult.Succeed)
{
throw new Exception("Verification failed");
}
}
var prevHash = NativeContract.Ledger.CurrentHash(neoSystem.StoreView);
var prevHeader = NativeContract.Ledger.GetHeader(neoSystem.StoreView, prevHash);
var block = ExpressOracle.CreateSignedBlock(prevHeader,
consensusNodesKeys.Value,
neoSystem.Settings.Network,
transactions);
await RelayBlockAsync(block).ConfigureAwait(false);
return(block.Hash);
}
public static async Task FastForwardAsync(Header prevHeader, uint blockCount, TimeSpan timestampDelta, KeyPair[] keyPairs, uint network, Func <Block, Task> submitBlockAsync)
{
if (timestampDelta.TotalSeconds < 0)
{
throw new ArgumentException($"Negative {nameof(timestampDelta)} not supported");
}
if (blockCount == 0)
{
return;
}
var timestamp = Math.Max(Neo.Helper.ToTimestampMS(DateTime.UtcNow), prevHeader.Timestamp + 1);
var delta = (ulong)timestampDelta.TotalMilliseconds;
if (blockCount == 1)
{
var block = ExpressOracle.CreateSignedBlock(
prevHeader, keyPairs, network, timestamp: timestamp + delta);
await submitBlockAsync(block).ConfigureAwait(false);
}
else
{
var period = delta / (blockCount - 1);
for (int i = 0; i < blockCount; i++)
{
var block = ExpressOracle.CreateSignedBlock(
prevHeader, keyPairs, network, timestamp: timestamp);
await submitBlockAsync(block).ConfigureAwait(false);
prevHeader = block.Header;
timestamp += period;
}
}
}
public async Task <UInt256> SubmitOracleResponseAsync(OracleResponse response, ECPoint[] oracleNodes)
{
var jsonTx = await rpcClient.RpcSendAsync("expresscreateoracleresponsetx", response.ToJson()).ConfigureAwait(false);
var tx = Convert.FromBase64String(jsonTx.AsString()).AsSerializable <Transaction>();
ExpressOracle.SignOracleResponseTransaction(chain, tx, oracleNodes);
return(await SubmitTransactionAsync(tx));
}
public async Task FastForwardAsync(uint blockCount, TimeSpan timestampDelta)
{
var prevHash = await rpcClient.GetBestBlockHashAsync().ConfigureAwait(false);
var prevHeaderHex = await rpcClient.GetBlockHeaderHexAsync($"{prevHash}").ConfigureAwait(false);
var prevHeader = Convert.FromBase64String(prevHeaderHex).AsSerializable <Header>();
await ExpressOracle.FastForwardAsync(prevHeader,
blockCount,
timestampDelta,
consensusNodesKeys.Value,
ProtocolSettings.Network,
block => rpcClient.SubmitBlockAsync(block.ToArray()));
}
public async Task FastForwardAsync(uint blockCount, TimeSpan timestampDelta)
{
if (disposedValue)
{
throw new ObjectDisposedException(nameof(OfflineNode));
}
var prevHash = NativeContract.Ledger.CurrentHash(neoSystem.StoreView);
var prevHeader = NativeContract.Ledger.GetHeader(neoSystem.StoreView, prevHash);
await ExpressOracle.FastForwardAsync(prevHeader,
blockCount,
timestampDelta,
consensusNodesKeys.Value,
ProtocolSettings.Network,
block => RelayBlockAsync(block));
}
public JObject?ExpressCreateOracleResponseTx(JArray @params)
{
var jsonResponse = @params[0];
var response = new OracleResponse
{
Id = (ulong)jsonResponse["id"].AsNumber(),
Code = (OracleResponseCode)jsonResponse["code"].AsNumber(),
Result = Convert.FromBase64String(jsonResponse["result"].AsString())
};
using var snapshot = neoSystem.GetSnapshot();
var height = NativeContract.Ledger.CurrentIndex(snapshot) + 1;
var oracleNodes = NativeContract.RoleManagement.GetDesignatedByRole(snapshot, Role.Oracle, height);
var request = NativeContract.Oracle.GetRequest(snapshot, response.Id);
var tx = ExpressOracle.CreateResponseTx(snapshot, request, response, oracleNodes, neoSystem.Settings);
return(tx == null ? null : Convert.ToBase64String(tx.ToArray()));
}
public async Task <UInt256> SubmitOracleResponseAsync(OracleResponse response, IReadOnlyList <ECPoint> oracleNodes)
{
if (disposedValue)
{
throw new ObjectDisposedException(nameof(OfflineNode));
}
using var snapshot = neoSystem.GetSnapshot();
var height = NativeContract.Ledger.CurrentIndex(snapshot) + 1;
var request = NativeContract.Oracle.GetRequest(snapshot, response.Id);
var tx = ExpressOracle.CreateResponseTx(snapshot, request, response, oracleNodes, ProtocolSettings);
if (tx == null)
{
throw new Exception("Failed to create Oracle Response Tx");
}
ExpressOracle.SignOracleResponseTransaction(ProtocolSettings, chain, tx, oracleNodes);
return(await SubmitTransactionAsync(tx));
}
