AVM operations

Algorand Python allows you to do express every op code the AVM has available submodule. We generally recommend importing this entire submodule so you can use intellisense to discover the available methods:

from algopy import UInt64, op, subroutine

@subroutine
def sqrt_16() -> UInt64:
    return op.sqrt(16)

All ops are typed using Algorand Python types and have correct static type representations.

Many ops have higher-order functionality that Algorand Python exposes and would limit the need to reach for the underlying ops. For instance, there is first-class support for local and global storage so there is little need to use the likes of app_local_get et. al. But they are still exposed just in case you want to do something that Algorand Python’s abstractions don’t support.

Txn

The Txn opcodes are so commonly used they have been exposed directly in the algopy module and can be easily imported to make it terser to access:

from algopy import subroutine, Txn

@subroutine
def has_no_app_args() -> bool:
    return Txn.num_app_args == 0

Global

The Global opcodes are so commonly used they have been exposed directly in the algopy module and can be easily imported to make it terser to access:

from algopy import subroutine, Global, Txn

@subroutine
def only_allow_creator() -> None:
    assert Txn.sender == Global.creator_address, "Only the contract creator can perform this operation"