public void Write(TxoPack txos, SectorIndex sectorIndex, Hash256 sectorHash)
{
if (_config.ImplicitSectors)
{
throw new InvalidOperationException();
}
var partition = PartitionByExplicitSector(sectorIndex, sectorHash, txos.GetForwardIterator());
Write(partition, txos);
}
/// <summary>
/// Reading layers with explicit outpoint ranges.
/// </summary>
/// <param name="txoIn">txopack providing outpoints requesting a read</param>
/// <param name="sectorIndex">Identifies the first sector to be read.</param>
/// <param name="sectorHash">Identifies the hash range of the sector.</param>
/// <param name="txoOut">output txoPack to collect read results</param>
private void Read(TxoPack txoIn, SectorIndex sectorIndex, Hash256 sectorHash, TxoPack txoOut)
{
if (_config.ImplicitSectors)
{
throw new InvalidOperationException();
}
var partition = PartitionByExplicitSector(sectorIndex, sectorHash, txoIn.GetForwardIterator());
Read(partition, txoOut);
}
/// <param name="start">Context provided by the upper layer.</param>
/// <param name="leftTxid">Context provided by the upper layer.</param>
/// <param name="iter">Should be sorted in increasing order.</param>
private IEnumerable <SectorRange> PartitionByExplicitSector(
SectorIndex start,
Hash256 leftTxid,
TxoForwardIterator iter)
{
var localSectorTxoPackWriteAnchor = _rangeOutputs.GetResetWriter();
var localSectorHash = leftTxid;
// TODO: [vermorel] To be replaced by a regular 'foreach'
for (; iter.EndNotReached; iter.MoveNext())
{
var outpoint = iter.Current;
var canonicalHash = outpoint.Txid.Truncate(_config.SectorBitDepth);
Debug.Assert(localSectorHash.CompareTo(canonicalHash) <= 0, "Unordered outpoints.");
if (!canonicalHash.Equals(localSectorHash))
{
// reach here means current outpoint from iterator is in different sector than
// localSectorHash, thus we need to flush what were written so far in writer
if (!localSectorTxoPackWriteAnchor.IsEmpty)
{
// this works because subSectors are all allocated once
var rangeIndex = start.GetNext(localSectorHash.Top(_config.SectorBitDepth) -
leftTxid.Top(_config.SectorBitDepth));
yield return(new SectorRange(rangeIndex, localSectorHash, _rangeOutputs));
// recycling the list
localSectorTxoPackWriteAnchor = _rangeOutputs.GetResetWriter();
}
// flush done, we switch to next leftTxid
localSectorHash = canonicalHash;
}
localSectorTxoPackWriteAnchor.Write(in outpoint, ReadOnlySpan <byte> .Empty);
}
if (!localSectorTxoPackWriteAnchor.IsEmpty)
{
var rangeIndex = start.GetNext(localSectorHash.Top(_config.SectorBitDepth) -
leftTxid.Top(_config.SectorBitDepth));
yield return(new SectorRange(rangeIndex, localSectorHash, _rangeOutputs));
}
}
public SectorRange(SectorIndex index, Hash256 leftTxid, TxoPack outpoints)
{
Index = index;
LeftTxid = leftTxid;
Outpoints = outpoints;
}