public Task <Block> GetBlockAsync(uint256 blockId)
 {
     return(_Repository.GetAsync <Block>(blockId.ToString()));
 }
 public Task PutAsync(uint256 blockId, Block block)
 {
     return(_Repository.PutAsync(blockId.ToString(), block));
 }
 private string GetId(uint256 txId)
 {
     return("tx-" + txId.ToString());
 }