checkBranchKeys ensures deriving the extended keys for the internal and external branches given an account key does not result in an invalid child err

deriveAccountKey derives the extended key for an account according to the hierarchy described by BIP0044 given the master node. In particular this is

deriveCoinTypeKey derives the cointype key which can be used to derive the extended key for an account according to the hierarchy described by BIP0044

writeNewFile writes data to a file named by filename. Error is returned if the file does exist. Otherwise writeNewFile creates the file with permissio

generateKeyPair generates and stores a secp256k1 keypair in a file.

generateSeed derives an address from an HDKeychain for use in wallet. It outputs the seed, address, and extended public key to the file specified.

promptSeed is used to prompt for the wallet seed which maybe required during upgrades.