public bool IsBlockchainValid(Block[] chain)
{
Block lastBlock = chain.LastOrDefault();
Block[] chainWithoutGenesisBlock = chain.Skip(1).ToArray();
bool hasMatchByHash = chainWithoutGenesisBlock.All(block => block.PreviousHash == hashCalculator.CalculateBlockHash(lastBlock));
bool hasMatchByProof = chainWithoutGenesisBlock.All(block => proofValidator.IsProofValid(lastBlock.Proof, block.Proof));
return(hasMatchByHash && hasMatchByProof);
}
public int GetProofOfWork(int lastProof)
{
int[] workload = Enumerable.Range(1, 8).Select(i => Int32.MaxValue / 8 / i).ToArray();
Task <int>[] workTasks = workload.Select(work => Task.Run(() =>
{
int proof = work;
while (!proofValidator.IsProofValid(lastProof, proof))
{
proof += 1;
}
return(proof);
})).ToArray();
int taskIndex = Task.WaitAny(workTasks);
int result = workTasks[taskIndex].Result;
return(result);
}