public void SyncWithNode(NeoAPI api)
{
var max = api.GetBlockHeight();
var min = (uint)_blocks.Count;
for (uint i = min; i <= max; i++)
{
var block = api.GetBlock(i);
AddBlock(block);
}
}
private static uint FindBlock(NeoAPI api, uint timestamp, uint min, uint max)
{
var mid = (1 + max - min) / 2;
do
{
var block = api.GetBlock(mid);
var blockTime = block.Date.ToTimestamp();
if (blockTime == timestamp)
{
return(block.Height);
}
else
if (blockTime < timestamp)
{
var next = api.GetBlock(mid + 1);
var nextTime = next.Date.ToTimestamp();
if (nextTime == timestamp)
{
return(next.Height);
}
else
if (nextTime > timestamp)
{
return(block.Height);
}
else
{
return(FindBlock(api, timestamp, mid + 1, max));
}
}
else
{
return(FindBlock(api, timestamp, min, mid - 1));
}
} while (true);
}
public Snapshot(UInt160 scriptHash, NeoAPI api, uint startBlock, uint endBlock = 0)
{
if (endBlock == 0)
{
endBlock = api.GetBlockHeight();
}
if (endBlock < startBlock)
{
throw new ArgumentException("End block cannot be smaller than start block");
}
for (uint height = startBlock; height <= endBlock; height++)
{
var block = api.GetBlock(height);
var snapCount = 0;
foreach (var tx in block.transactions)
{
switch (tx.type)
{
case TransactionType.ContractTransaction:
{
foreach (var output in tx.outputs)
{
if (output.scriptHash == scriptHash)
{
MergeTransaction(api, tx);
snapCount++;
break;
}
}
break;
}
case TransactionType.InvocationTransaction:
{
List <AVMInstruction> ops;
try
{
ops = NeoTools.Disassemble(tx.script);
}
catch
{
continue;
}
for (int i = 0; i < ops.Count; i++)
{
var op = ops[i];
if (op.opcode == OpCode.APPCALL && op.data != null && op.data.Length == 20)
{
var otherScriptHash = new UInt160(op.data);
if (otherScriptHash == scriptHash)
{
MergeTransaction(api, tx);
snapCount++;
break;
}
}
}
break;
}
}
}
if (snapCount > 0)
{
blocks[block.Hash] = block;
}
}
}