/// <summary>
/// Builds the basic filter for a given block.
///
/// The basic filter is designed to contain everything that a light client needs to sync a regular Bitcoin wallet.
/// A basic filter MUST contain exactly the following items for each transaction in a block:
/// * The outpoint of each input, except for the coinbase transaction
/// * The scriptPubKey of each output
/// * The txid of the transaction itself
/// </summary>
/// <param name="block">The block used for building the filter.</param>
/// <returns>The basic filter for the block.</returns>
public static GolombRiceFilter BuildBasicFilter(Block block)
{
var builder = new GolombRiceFilterBuilder()
.SetKey(block.GetHash());
foreach (var tx in block.Transactions)
{
if (!tx.IsCoinBase) // except for the coinbase transaction
{
foreach (var txin in tx.Inputs)
{
// The outpoint of each input
builder.AddOutPoint(txin.PrevOut);
}
}
foreach (var txout in tx.Outputs)
{
// The scriptPubKey of each output
builder.AddScriptPubkey(txout.ScriptPubKey);
}
}
return(builder.Build());
}
