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How do I interpret the OrderFilled onchain event?

Given an OrderFilled event:
  • orderHash: a unique hash for the Order being filled
  • maker: the user generating the order and the source of funds for the order
  • taker: the user filling the order OR the Exchange contract if the order fills multiple limit orders
  • makerAssetId: id of the asset that is given out. If 0, indicates that the Order is a BUY, giving USDC in exchange for Outcome tokens. Else, indicates that the Order is a SELL, giving Outcome tokens in exchange for USDC.
  • takerAssetId: id of the asset that is received. If 0, indicates that the Order is a SELL, receiving USDC in exchange for Outcome tokens. Else, indicates that the Order is a BUY, receiving Outcome tokens in exchange for USDC.
  • makerAmountFilled: the amount of the asset that is given out.
  • takerAmountFilled: the amount of the asset that is received.
  • fee: the fees paid by the order maker
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