text: from typing import List
  
  from blspy import AugSchemeMPL, PrivateKey
  
  from seno.util.ints import uint32
  
  # EIP 2334 bls key derivation
  # https://eips.ethereum.org/EIPS/eip-2334
  # 12381 = bls spec number
  # 18444 = Seno blockchain number and port number
  # 0, 1, 2, 3, 4, farmer, pool, wallet, local, backup key numbers
  
  
  def _derive_path(sk: PrivateKey, path: List[int]) -> PrivateKey:
      for index in path:
          sk = AugSchemeMPL.derive_child_sk(sk, index)
      return sk
  
  
  def master_sk_to_farmer_sk(master: PrivateKey) -> PrivateKey:
      return _derive_path(master, [12381, 8444, 0, 0])
  
  
  def master_sk_to_pool_sk(master: PrivateKey) -> PrivateKey:
      return _derive_path(master, [12381, 8444, 1, 0])
  
  
  def master_sk_to_wallet_sk(master: PrivateKey, index: uint32) -> PrivateKey:
      return _derive_path(master, [12381, 8444, 2, index])
  
  
  def master_sk_to_local_sk(master: PrivateKey) -> PrivateKey:
      return _derive_path(master, [12381, 8444, 3, 0])
  
  
  def master_sk_to_backup_sk(master: PrivateKey) -> PrivateKey:
      return _derive_path(master, [12381, 8444, 4, 0])
  