public IEnumerable <ICoin> Select(IEnumerable <ICoin> coins, IMoney target)
{
var result = new List <ICoin>();
IMoney total = Money.Zero;
if (target.CompareTo(Money.Zero) == 0)
{
return(result);
}
foreach (ICoin coin in coins)
{
// Build up our ongoing total
total = total.Add(coin.Amount);
result.Add(coin);
// If we make the target, return the current set.
if (total.CompareTo(target) >= 0)
{
return(result);
}
}
// If we are here we didn't have enough funds.
return(null);
}
public IEnumerable <ICoin> Select(IEnumerable <ICoin> coins, IMoney target)
{
var result = new List <ICoin>();
IMoney total = Money.Zero;
if (target.CompareTo(Money.Zero) == 0)
{
return(result);
}
var orderedCoinGroups = coins.GroupBy(c => new Key().ScriptPubKey)
.Select(scriptPubKeyCoins => new
{
Amount = scriptPubKeyCoins.Select(c => c.Amount).Sum(Money.Zero),
Coins = scriptPubKeyCoins.ToList()
}).OrderBy(c => c.Amount);
//If any of your UTXO² matches the Target¹ it will be used.
var targetCoin = orderedCoinGroups.FirstOrDefault(c => c.Amount.CompareTo(target) == 0);
if (targetCoin != null)
{
return(targetCoin.Coins);
}
foreach (var coinGroup in orderedCoinGroups)
{
// If this UTXO is greater than the target, just use it.
if (coinGroup.Amount.CompareTo(target) == 1)
{
return(coinGroup.Coins);
}
// Build up our ongoing total
total = total.Add(coinGroup.Amount);
result.AddRange(coinGroup.Coins);
// If we go over the total, return the current set.
if (total.CompareTo(target) == 1)
{
return(result);
}
}
// If we didn't have enough funds, return null
if (total.CompareTo(target) == -1)
{
return(null);
}
return(result);
}
public static IMoney Sum(this IEnumerable<IMoney> moneys, IMoney zero)
{
if(moneys == null)
throw new ArgumentNullException("moneys");
if(zero == null)
throw new ArgumentNullException("zero");
IMoney result = zero;
foreach(var money in moneys)
{
result = result.Add(money);
}
return result;
}
private void AppendMoney(Money aMoney)
{
IMoney old = FindMoney(aMoney.Currency);
if (old == null)
{
fMonies.Add(aMoney);
return;
}
fMonies.Remove(old);
IMoney sum = old.Add(aMoney);
if (sum.IsZero)
{
return;
}
fMonies.Add(sum);
}
public static IMoney Sum(this IEnumerable <IMoney> moneys, IMoney zero)
{
if (moneys == null)
{
throw new ArgumentNullException(nameof(moneys));
}
if (zero == null)
{
throw new ArgumentNullException(nameof(zero));
}
IMoney result = zero;
foreach (var money in moneys)
{
result = result.Add(money);
}
return(result);
}