public async Task Execute(IJobExecutionContext context)
{
tempBlockChains = await blockChainsDbContext.AllBlockChains.SingleOrDefaultAsync(m => m.ID == 1);
//First time scheduler is running
if (tempBlockChains == null)
{
//Initialize all block chains with genesis block
var newBlockChains = new StoreBlockChains();
newBlockChains.PureMedBlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
newBlockChains.Verifier_1BlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
newBlockChains.Verifier_2BlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
newBlockChains.Verifier_3BlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
newBlockChains.Difficulty = PureMedBlockChain.Difficulty;
//Store Initialized blockChains in database
await blockChainsDbContext.AllBlockChains.AddAsync(newBlockChains);
await blockChainsDbContext.SaveChangesAsync();
//Initialize local blockchains to genesis block
tempBlockChains = new StoreBlockChains();
tempBlockChains.PureMedBlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
tempBlockChains.Verifier_1BlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
tempBlockChains.Verifier_2BlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
tempBlockChains.Verifier_3BlockChain = JsonConvert.SerializeObject(PureMedBlockChain.Chain);
tempBlockChains.Difficulty = PureMedBlockChain.Difficulty;
}
//Get mainBlockChain from database
PureMedBlockChain.Chain = JsonConvert.DeserializeObject <List <Block> >(tempBlockChains.PureMedBlockChain);
PureMedBlockChain.Difficulty = tempBlockChains.Difficulty;
//Get all pending transactions till now and store them in mining transactions for mining
PureMedBlockChain.MiningTransactions = PureMedBlockChain.PendingTransactions;
PureMedBlockChain.PendingTransactions = new List <Transaction>();
//Create and mine new block
Block tempBlock = new Block(PureMedBlockChain.GetLatestBlock().CurrentHash, PureMedBlockChain.MiningTransactions, PureMedBlockChain.Difficulty);
await tempBlock.MineBlock(PureMedBlockChain.Difficulty);
//Fire up first verifier to verify if new block is okay
if (await Verifier1(tempBlock) == true)
{
logger.LogInformation($"Block mined with hash : {tempBlock.CurrentHash}. Log Timestamp : {DateTime.Now.ToLongTimeString()}.");
}
else
{
//In Case block is not okay, restore all transactions to pending transactions
PureMedBlockChain.PendingTransactions.AddRange(PureMedBlockChain.MiningTransactions);
PureMedBlockChain.MiningTransactions = new List <Transaction>();
logger.LogError($"Block can't be mined or verified. Log Timestamp : {DateTime.Now.ToLongDateString()}.");
}
}
public ScheduledMiner(IConfiguration cfg, IOptions <BlockChain> blockChain, BlockChainsDbContext sdb, ILogger <ScheduledMiner> log)
{
configuration = cfg;
PureMedBlockChain = blockChain.Value;
blockChainsDbContext = sdb;
Verifier1Chain = new Verifier_1BlockChain();
Verifier2Chain = new Verifier_2BlockChain();
Verifier3Chain = new Verifier_3BlockChain();
tempBlockChains = new StoreBlockChains();
logger = log;
}