degenbot.balancer.libraries.constants

Balancer V2 math constants (ONE, MIN_TOKEN_BALANCES, PowVersion).

Module Contents

degenbot.balancer.libraries.constants.ONE = 1000000000000000000

degenbot.balancer.libraries.constants.TWO = 2000000000000000000

degenbot.balancer.libraries.constants.FOUR = 4000000000000000000

degenbot.balancer.libraries.constants.MAX_POW_RELATIVE_ERROR = 10000

class degenbot.balancer.libraries.constants.PowVersion(*args, **kwds)

Bases: enum.Enum

Identifies which FixedPoint.pow implementation a deployed pool contract uses.

Different deployed versions of Balancer V2 WeightedPool contracts embed different versions of the FixedPoint library:

• V1 (no fast paths): older contracts like WeightedPool2Tokens use the general LogExpMath.pow path with MAX_POW_RELATIVE_ERROR error bound for all exponent values. This was the original implementation.

• V2 (with fast paths): newer WeightedPool contracts include fast paths for y == 1, y == 2, and y == 4 that bypass the error-bound calculation, producing different rounding behavior.

The version is detected from the pool’s deployed bytecode at build time and stored on the pool instance so swap calculations match the on-chain contract exactly.

V1 = 'v1'

V2 = 'v2'

to_u8() → int

Return the u8 discriminant threaded across the Rust seam (1 = V1, 2 = V2).

Mirrors degenbot_balancer_math::PowVersion::to_u8 so the bytecode-detected version crosses the FFI boundary to the Rust math leaf as a plain u8.

Returns:

1 for V1, 2 for V2.