snippet from https://github.com/RiccardoBiosas/opium-call-option-example/blob/main/test/callOptionWithDAICollateral.ts

DerivativeRecipe.ts

const derivative = derivativeFactory({
  margin: toBN("40"), //required collateral denominated in DAI token
  endTime: ~~(Date.now() / 1000) + SECONDS_40_MINS, // Now + 40 mins
  params: [
    toBN("3430"), // Strike Price 3430DAI
  ],
  oracleId: adminOracleController.address,
  token: dai.address,
  syntheticId: optionCallMock.address,
});