public void HasNeededServicesTest(NodeServiceFlags flags, BlockchainState state, bool expected)
{
var cs = new ClientSettings();
Helper.SetReadonlyProperty(cs, nameof(cs.Blockchain), new MockBlockchain()
{
_stateToReturn = state
});
bool actual = cs.HasNeededServices(flags);
Assert.Equal(expected, actual);
}
public bool ValidateGenesisBlock(BlockHashed newBlock, out BlockchainState blockchainState)
{
var expectedSignedGenesis = Genesis.GetBlockData(_cryptography, newBlock.Signed.Data.TimeStamp);
var result = ValidateParent(0, Genesis.Hash, newBlock.Signed.Data,
out blockchainState);
if (result)
{
ValidateSignature(expectedSignedGenesis.Stamp, newBlock.Signed);
ValidateBlockHash(expectedSignedGenesis, newBlock.HashTarget);
}
return(result);
}
public bool ValidateNewBlock(BlockHashed lastBlock, BlockHashed newBlock, out BlockchainState blockchainState)
{
var result = ValidateParent(lastBlock.Signed.Data.Index + 1, lastBlock.HashTarget.Hash, newBlock.Signed.Data,
out blockchainState);
if (result)
{
ValidateHashTarget(lastBlock, newBlock);
ValidateSignature(newBlock.Signed.Stamp, newBlock.Signed);
ValidateBlockHash(newBlock);
ValidateTransactions(newBlock.Signed.Data.Transactions);
}
return(result);
}
private bool ValidateBlock(BlockHashed newBlock, BlockHashed lastBlock, out BlockchainState blockchainState)
{
bool result;
if (lastBlock == null)
{
result = ValidateGenesisBlock(newBlock, out blockchainState);
}
else
{
result = ValidateNewBlock(lastBlock, newBlock, out blockchainState);
if (result)
{
RemovePendingTransactions(newBlock.Signed.Data.Transactions);
}
}
return(result);
}
private static bool ValidateParent(int expectedHeight, Hash expectedHash, BlockData newBlock, out BlockchainState blockchainState)
{
if (newBlock.Index > expectedHeight)
{
blockchainState = BlockchainState.NeedSync;
return(false);
}
if (newBlock.Index != expectedHeight)
{
throw new BlockchainValidationException($"New block Height {newBlock.Index} do not match the expected Height {expectedHeight}");
}
if (newBlock.ParentHash != expectedHash)
{
throw new BlockchainValidationException($"New block parent hash {newBlock.ParentHash} do not match the expected {expectedHash}");
}
blockchainState = BlockchainState.Healty;
return(true);
}
