/// <summary>
/// Get a block by its Block Identifier.
/// If transactions are returned in the same call to the node as fetching the block,
/// the response should include these transactions in the Block object.
/// If not, an array of Transaction Identifiers should be returned.
/// So /block/transaction fetches can be done to get all transaction information.
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public JObject Block(BlockRequest request)
{
if (request.NetworkIdentifier?.Blockchain?.ToLower() != "neo n3")
{
return(Error.NETWORK_IDENTIFIER_INVALID.ToJson());
}
if (request.NetworkIdentifier?.Network?.ToLower() != network)
{
return(Error.NETWORK_IDENTIFIER_INVALID.ToJson());
}
var snapshot = system.GetSnapshot();
NeoBlock neoBlock;
if (request.BlockIdentifier is null ||
(request.BlockIdentifier.Index is null && request.BlockIdentifier.Hash is null))
{
neoBlock = NativeContract.Ledger.GetBlock(snapshot, NativeContract.Ledger.CurrentHash(snapshot));
}
/// <summary>
/// Get a block by its Block Identifier.
/// If transactions are returned in the same call to the node as fetching the block,
/// the response should include these transactions in the Block object.
/// If not, an array of Transaction Identifiers should be returned.
/// So /block/transaction fetches can be done to get all transaction information.
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public JObject Block(BlockRequest request)
{
var index = request.BlockIdentifier.Index;
var hash = request.BlockIdentifier.Hash;
if (index == null && hash == null)
{
return(Error.BLOCK_IDENTIFIER_INVALID.ToJson());
}
if (index != null && index < 0)
{
return(Error.BLOCK_INDEX_INVALID.ToJson());
}
NeoBlock neoBlock;
UInt256 blockHash;
if (hash != null)
{
if (!UInt256.TryParse(hash, out blockHash))
{
return(Error.BLOCK_HASH_INVALID.ToJson());
}
}
else
{
blockHash = Blockchain.Singleton.GetBlockHash((uint)index);
if (blockHash == null)
{
return(Error.BLOCK_INDEX_INVALID.ToJson());
}
}
neoBlock = Blockchain.Singleton.GetBlock(blockHash);
if (neoBlock == null)
{
return(Error.BLOCK_NOT_FOUND.ToJson());
}
BlockIdentifier blockIdentifier = new BlockIdentifier(neoBlock.Index, neoBlock.Hash.ToString());
// get parent block
BlockIdentifier parentBlockIdentifier;
if (neoBlock.Index == 0)
{
parentBlockIdentifier = blockIdentifier;
}
else
{
var parentBlockHash = Blockchain.Singleton.GetBlockHash(neoBlock.Index - 1);
if (parentBlockHash == null)
{
return(Error.BLOCK_INDEX_INVALID.ToJson());
}
var parentBlock = Blockchain.Singleton.GetBlock(parentBlockHash);
if (parentBlock == null)
{
return(Error.BLOCK_NOT_FOUND.ToJson());
}
parentBlockIdentifier = new BlockIdentifier(parentBlock.Index, parentBlock.Hash.ToString());
}
// handle transactions
Transaction[] transactions = new Transaction[] { };
TransactionIdentifier[] otherTransactions = new TransactionIdentifier[] { };
foreach (var neoTx in neoBlock.Transactions)
{
var tx = ConvertTx(neoTx);
if (tx == null)
{
continue;
}
if (tx.Operations.Length > 0)
{
transactions = transactions.Append(tx).ToArray();
}
else
{
otherTransactions = otherTransactions.Append(new TransactionIdentifier(neoTx.Hash.ToString())).ToArray();
}
}
Block block = new Block(blockIdentifier, parentBlockIdentifier, neoBlock.Timestamp * 1000, transactions);
BlockResponse response = new BlockResponse(block, otherTransactions.Length > 0 ? otherTransactions : null);
return(response.ToJson());
}