How can we make a cross contract call to a payable message from parent contract?

Question

Contract A has a Payable Method and contract B has ContractRef of A saved in storage. I can call other methods on Contract A but not sure how to call the payable method from Contract B. Tried with call builder as well like this :

build_call::<DefaultEnvironment>()
   .call_type(
      Call::new()
      .callee(contractBRef.get_account())
      .gas_limit(0)
      .transferred_value(amount))
      .exec_input(
         ExecutionInput::new(Selector::new([0xDE, 0xAD, 0xBE, 0xEF]))
         .push_arg::<AccountId>(candidate)
         .push_arg::<u128>(0)
         .push_arg::<u128>(amount)
         .push_arg::<u128>(0)
         .push_arg::<u128>(100)
      ).call_flags(CallFlags::default()).returns::<Result<()>>().unwrap()

But the call is returning CalleeTrapped Error.

Answer 1

Thank you all for help. The issue was being caused by contract trying to make a balance transfer less than existential deposit.