# TealInputError: Argument is not a PyTeal expression: (\<pyteal.BinaryExpr object at 0x000002695E9A4CD0\>,)

**URL:** <https://forum.algorand.co/t/tealinputerror-argument-is-not-a-pyteal-expression-pyteal-binaryexpr-object-at-0x000002695e9a4cd0/6448>\
**Category:** General\
**Created:** [April 11, 2022, 2:49pm UTC](https://forum.algorand.co/t/tealinputerror-argument-is-not-a-pyteal-expression-pyteal-binaryexpr-object-at-0x000002695e9a4cd0/6448 "2022-04-11T14:49:04Z")\
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**Showing post:** 1

<div class="post-metadata">

**Author:** ![Mustafa](https://avatars.discourse-cdn.com/v4/letter/m/f19dbf/32.png) [@Mustafa](https://forum.algorand.co/u/Mustafa)\
**Post date:** [April 11, 2022, 2:49pm UTC](https://forum.algorand.co/t/tealinputerror-argument-is-not-a-pyteal-expression-pyteal-binaryexpr-object-at-0x000002695e9a4cd0/6448/1 "2022-04-11T14:49:04Z")

</div>

```auto
TealInputError: Argument is not a PyTeal expression: (<pyteal.BinaryExpr object at 0x7fe7e08b8950>,)

```

```auto
"""Atomic Swap"""

alice = Addr("6ZHGHH5Z5CTPCF5WCESXMGRSVK7QJETR63M3NY5FJCUYDHO57VTCMJOBGY")
bob = Addr("7Z5PWO2C6LFNQFGHWKSK5H47IQP5OJW2M3HA2QPXTY3WTNP5NU2MHBW27M")
secret = Bytes("base32", "2323232323232323")
timeout = 3000

def htlc(
    tmpl_seller = alice,
    tmpl_buyer = bob,
    tmpl_fee = 1000,
    tmpl_secret = secret,
    tmpl_hash_fn = Sha256,
    tmpl_timeout = timeout,
):

    fee_cond = Txn.fee() < Int(tmpl_fee),

    safety_cond = And(
        Txn.type_enum() == TxnType.Payment,
        Txn.close_remainder_to() == Global.zero_address(),
        Txn.rekey_to() == Global.zero_address(),
    )

    recv_cond = And(Txn.receiver() == tmpl_seller, tmpl_hash_fn(Arg(0)) == tmpl_secret)
    esc_cond = And(Txn.receiver() == tmpl_buyer, Txn.first_valid() > Int(tmpl_timeout))

    return And(fee_cond, 
               safety_cond, 
               Or(recv_cond, esc_cond))

if __name__ == " __main__":
    print(compileTeal(htlc(), mode = Mode.Signature, version = 2))

```

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