# PoolFeesUpdated

**Purpose**: Emitted when the pool’s fee percentage is updated by the pool owner (if authorized).

**Key Inclusions**:

* `pool_id`: The pool whose fees changed.
* `old_fee`: The previous fee percentage.
* `new_fee`: The new fee percentage after the update.
* `changed_by`: The address that performed the fee update.
* `timestamp`: When the fee change took effect.

**Use Cases**:

* Notify traders that the cost of trading might have changed, influencing their strategy.
* Help liquidity providers anticipate changes in their fee earnings.
* Keep historical records of fee adjustments for analytics and user trust.

By monitoring these events, participants in the ecosystem—traders, liquidity providers, marketplace operators, and data services—can stay informed about the evolving state of each trading pool, liquidity positions, and pricing conditions. The events ensure a high level of transparency, driving informed decision-making and supporting a vibrant, well-functioning NFT marketplace.


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