public void TestBadTransactions()
{
var block = new Block(_params, _blockBytes);
// Re-arrange so the coinbase transaction is not first.
var tx1 = block.Transactions[0];
var tx2 = block.Transactions[1];
block.Transactions[0] = tx2;
block.Transactions[1] = tx1;
try
{
block.Verify();
Assert.Fail();
}
catch (VerificationException)
{
// We should get here.
}
}
public void TestBlockVerification()
{
var block = new Block(_params, _blockBytes);
block.Verify();
Assert.AreEqual("00000000a6e5eb79dcec11897af55e90cd571a4335383a3ccfbc12ec81085935", block.HashAsString);
}
public void TestProofOfWork()
{
// This params accepts any difficulty target.
var @params = NetworkParameters.UnitTests();
var block = new Block(@params, _blockBytes);
block.Nonce = 12346;
try
{
block.Verify();
Assert.Fail();
}
catch (VerificationException)
{
// Expected.
}
// Blocks contain their own difficulty target. The BlockChain verification mechanism is what stops real blocks
// from containing artificially weak difficulties.
block.TargetDifficulty = Block.EasiestDifficultyTarget;
// Now it should pass.
block.Verify();
// Break the nonce again at the lower difficulty level so we can try solving for it.
block.Nonce = 1;
try
{
block.Verify();
Assert.Fail();
}
catch (VerificationException)
{
// Expected to fail as the nonce is no longer correct.
}
// Should find an acceptable nonce.
block.Solve();
block.Verify();
Assert.AreEqual(block.Nonce, 2U);
}