protected APIResultCodes VerifyBlock(TransactionBlock block, TransactionBlock previousBlock)
{
if (NodeGlobalParameters.Network_Id != block.NetworkId)
{
return(APIResultCodes.InvalidNetworkId);
}
if (!block.IsBlockValid(previousBlock))
{
return(APIResultCodes.BlockValidationFailed);
}
//if (!Signatures.VerifySignature(block.Hash, block.AccountID, block.Signature))
// return APIResultCodes.BlockSignatureValidationFailed;
if (!block.VerifySignature(block.AccountID))
{
return(APIResultCodes.BlockSignatureValidationFailed);
}
// check if this Index already exists (double-spending, kind of)
if (_accountCollection.FindBlockByIndex(block.AccountID, block.Index) != null)
{
return(APIResultCodes.BlockWithThisIndexAlreadyExists);
}
// This is the double-spending check for send block!
if (!string.IsNullOrEmpty(block.PreviousHash) && _accountCollection.FindBlockByPreviousBlockHash(block.PreviousHash) != null)
{
return(APIResultCodes.BlockWithThisPreviousHashAlreadyExists);
}
if (block.Index <= 0)
{
return(APIResultCodes.InvalidIndexSequence);
}
if (block.Index > 1 && previousBlock == null)
{
return(APIResultCodes.CouldNotFindLatestBlock);
}
if (block.Index == 1 && previousBlock != null)
{
return(APIResultCodes.InvalidIndexSequence);
}
if (previousBlock != null && block.Index != previousBlock.Index + 1)
{
return(APIResultCodes.InvalidIndexSequence);
}
if (!ValidateRenewalDate(block, previousBlock))
{
return(APIResultCodes.TokenExpired);
}
return(APIResultCodes.Success);
}
public TransactionBlock FindBlockByPreviousBlockHash(string previousBlockHash) => _store.FindBlockByPreviousBlockHash(previousBlockHash);