static transferMessage(jetton_amount: bigint, to: Address,
                           responseAddress:Address,
                           customPayload: Cell | null,
                           forward_ton_amount: bigint,
                           forwardPayload: Cell | null) {
        return beginCell().storeUint(0xf8a7ea5, 32).storeUint(0, 64) // op, queryId
                          .storeCoins(jetton_amount).storeAddress(to)
                          .storeAddress(responseAddress)
                          .storeMaybeRef(customPayload)
                          .storeCoins(forward_ton_amount)
                          .storeMaybeRef(forwardPayload)
               .endCell();
    }