public void CanSplitFees()
{
var satoshi = new Key();
var alice = new Key();
var bob = new Key();
var aliceCoins = new ICoin[] { RandomCoin("0.4", alice), RandomCoin("0.6", alice) };
var bobCoins = new ICoin[] { RandomCoin("0.2", bob), RandomCoin("0.3", bob) };
TransactionBuilder builder = new TransactionBuilder();
FeeRate rate = new FeeRate(Money.Coins(0.0004m));
var tx = builder
.AddCoins(aliceCoins)
.AddKeys(alice)
.Send(satoshi, Money.Coins(0.1m))
.SetChange(alice)
.Then()
.AddCoins(bobCoins)
.AddKeys(bob)
.Send(satoshi, Money.Coins(0.01m))
.SetChange(bob)
.SendEstimatedFeesSplit(rate)
.BuildTransaction(true);
var estimated = builder.EstimateFees(tx, rate);
Assert.True(builder.Verify(tx, estimated));
// Alice should pay two times more fee than bob
builder = new TransactionBuilder();
tx = builder
.AddCoins(aliceCoins)
.AddKeys(alice)
.SetFeeWeight(2.0m)
.Send(satoshi, Money.Coins(0.1m))
.SetChange(alice)
.Then()
.AddCoins(bobCoins)
.AddKeys(bob)
.Send(satoshi, Money.Coins(0.01m))
.SetChange(bob)
.SendFeesSplit(Money.Coins(0.6m))
.BuildTransaction(true);
var spentAlice = builder.FindSpentCoins(tx).Where(c => aliceCoins.Contains(c)).OfType<Coin>().Select(c => c.Amount).Sum();
var receivedAlice = tx.Outputs.AsCoins().Where(c => c.ScriptPubKey == alice.PubKey.Hash.ScriptPubKey).Select(c => c.Amount).Sum();
Assert.Equal(Money.Coins(0.1m + 0.4m), spentAlice - receivedAlice);
var spentBob = builder.FindSpentCoins(tx).Where(c => bobCoins.Contains(c)).OfType<Coin>().Select(c => c.Amount).Sum();
var receivedBob = tx.Outputs.AsCoins().Where(c => c.ScriptPubKey == bob.PubKey.Hash.ScriptPubKey).Select(c => c.Amount).Sum();
Assert.Equal(Money.Coins(0.01m + 0.2m), spentBob - receivedBob);
}
