import invariant from 'tiny-invariant'
import type { Hex } from 'viem'
import type { Config } from '../createConfig.js'

export type GetSymmetricKeyReturnType = Hex
export function getSymmetricKey(config: Config): GetSymmetricKeyReturnType {
  const {
    utils,
    state: { seed },
  } = config
  invariant(seed, 'Seed is required')
  return utils.get_symmetric_key(seed) as Hex
}