text: from kujenga.util.ints import uint64
  
  from .constants import ConsensusConstants
  
  testnet_kwargs = {
      "SLOT_BLOCKS_TARGET": 32,
      "MIN_BLOCKS_PER_CHALLENGE_BLOCK": 16,  # Must be less than half of SLOT_BLOCKS_TARGET
      "MAX_SUB_SLOT_BLOCKS": 128,  # Must be less than half of SUB_EPOCH_BLOCKS
      "NUM_SPS_SUB_SLOT": 64,  # Must be a power of 2
      "SUB_SLOT_ITERS_STARTING": 2 ** 27,
      # DIFFICULTY_STARTING is the starting difficulty for the first epoch, which is then further
      # multiplied by another factor of DIFFICULTY_CONSTANT_FACTOR, to be used in the VDF iter calculation formula.
      "DIFFICULTY_CONSTANT_FACTOR": 2 ** 64,
      "DIFFICULTY_STARTING": 4,
      "DIFFICULTY_CHANGE_MAX_FACTOR": 3,  # The next difficulty is truncated to range [prev / FACTOR, prev * FACTOR]
      # These 3 constants must be changed at the same time
      "SUB_EPOCH_BLOCKS": 384,  # The number of blocks per sub-epoch, mainnet 384
      "EPOCH_BLOCKS": 4608,  # The number of blocks per epoch, mainnet 4608. Must be multiple of SUB_EPOCH_SB
      "SIGNIFICANT_BITS": 8,  # The number of bits to look at in difficulty and min iters. The rest are zeroed
      "DISCRIMINANT_SIZE_BITS": 1024,  # Max is 1024 (based on ClassGroupElement int size)
      "NUMBER_ZERO_BITS_PLOT_FILTER": 9,  # H(plot signature of the challenge) must start with these many zeroes
      "MIN_PLOT_SIZE": 32,  # 32 for mainnet
      "MAX_PLOT_SIZE": 50,
      "SUB_SLOT_TIME_TARGET": 600,  # The target number of seconds per slot, mainnet 600
      "NUM_SP_INTERVALS_EXTRA": 3,  # The number of sp intervals to add to the signage point
      "MAX_FUTURE_TIME": 5 * 60,  # The next block can have a timestamp of at most these many seconds in the future
      "NUMBER_OF_TIMESTAMPS": 11,  # Than the average of the last NUMBER_OF_TIMESTAMPS blocks
      # Used as the initial cc rc challenges, as well as first block back pointers, and first SES back pointer
      # We override this value based on the chain being run (testnet0, testnet1, mainnet, etc)
      # Default used for tests is std_hash(b'')
      "GENESIS_CHALLENGE": bytes.fromhex("cd2fc5f5f31fa924cf4ccd0950da415887a212c8dabcea52baca634f2011edbe"),
      # Forks of kujenga should change this value to provide replay attack protection. This is set to mainnet genesis chall
      "AGG_SIG_ME_ADDITIONAL_DATA": bytes.fromhex("707cab3aede5efd4258e81e995009c5090cbed67f58770ee0d88e5b322471aa9"),
      "GENESIS_PRE_FARM_POOL_PUZZLE_HASH": bytes.fromhex(
          "057936d76c2d10d4b94bc2cb7ebe2566879d90d26537b8346713b92fd27b12d8"
      ),
      "GENESIS_PRE_FARM_FARMER_PUZZLE_HASH": bytes.fromhex(
          "5be0d5ec1109d5465be6cc6c477d912a15934a783bf3622bd9eb4c158a8c0a79"
      ),
      "MAX_VDF_WITNESS_SIZE": 64,
      # Size of mempool = 50x the size of block
      "MEMPOOL_BLOCK_BUFFER": 50,
      # Max coin amount, fits into 64 bits
      "MAX_COIN_AMOUNT": uint64((1 << 64) - 1),
      # Max block cost in clvm cost units
      "MAX_BLOCK_COST_CLVM": 11000000000,
      # The cost per byte of generator program
      "COST_PER_BYTE": 12000,
      "WEIGHT_PROOF_THRESHOLD": 2,
      "BLOCKS_CACHE_SIZE": 4608 + (128 * 4),
      "WEIGHT_PROOF_RECENT_BLOCKS": 1000,
      "MAX_BLOCK_COUNT_PER_REQUESTS": 32,  # Allow up to 32 blocks per request
      "NETWORK_TYPE": 0,
      "MAX_GENERATOR_SIZE": 1000000,
      "MAX_GENERATOR_REF_LIST_SIZE": 512,  # Number of references allowed in the block generator ref list
      "POOL_SUB_SLOT_ITERS": 37600000000,  # iters limit * NUM_SPS
  }
  
  
  DEFAULT_CONSTANTS = ConsensusConstants(**testnet_kwargs)  # type: ignore
  