Interface Patterns

importlib.enforce_interface(...) lets a contract validate another contract's shape before using it.

Example

token = importlib.import_module("con_token")

ok = importlib.enforce_interface(
    token,
    [
        importlib.Func("transfer", args=("amount", "to")),
        importlib.Var("balances", Hash),
    ],
)

assert ok, "Token does not satisfy the expected interface"

Why It Matters

This is the closest thing to interface checking in the contract runtime. It is especially useful for dynamic imports and contract-standard enforcement.