PriceUpdateEvent

Purpose: Emitted when the sale price is updated, signaling changes in pricing strategy by the seller.

Key Inclusions:

• sale_id: The sale being updated.

• old_price: The price per NFT before the update.

• new_price: The new price per NFT after the update.

• changed_by: The address that performed the price update.

• timestamp: When the price change occurred.

• collection_id: Which collection this sale belongs to.

Use Cases:

• Notify watchers that the cost to purchase NFTs has changed.

• Update any listed prices on marketplaces or dashboards.

• Provide historical pricing data for analytics or for buyers waiting for favorable prices.