Developing a Game - Is there an unpredictable value before the block is generated?

I’m making a game where the game result is based on a specified block, and I have to make sure that the hashes I pick are unpredictable before the block is generated.
For example:

 rpc call get_block_record_by_height -d '{"height": 1949327}'

I have selected the following 3 hashes.

1.header_hash
2.farmer_puzzle_hash
3.reward_infusion_new_challenge

My question is:

  1. I would like someone to give me confirmation that these three hash values are unpredictable before the block is generated.

  2. Could anyone suggest where I could find information on this?

1 Like

Think that forum might be a better place to ask if you are building something