Function: fillOrder(SilicaOrder order, bytes signature, uint256 fraction)

This function is used to fill an order with the given parameters.

Inputs

• order

  • Control: Arbitrary.

  • Constraints: None.

  • Impact: Order to fill.

• signature

  • Control: Arbitrary.

  • Constraints: None.

  • Impact: Signature of the order.

• fraction

  • Control: Arbitrary.

  • Constraints: None.

  • Impact: Value of the fraction.

Branches and code coverage

Intended branches

• Transfers offeredUpfrontToken from the maker to the caller.

  Test coverage

• Transfers requestedUpfrontToken from the caller to the maker.

  Test coverage

• Collects surcharge from the caller.

  Test coverage

• Invokes _collateralizedMint for the long shares and the short shares for the maker and the caller.

  Test coverage

• Updates sFilledFraction for the order.

  Test coverage

Negative behavior

• Reverts if this function is called within a reentrant call.

  Negative test

• Reverts if the order has already been filled.

  Negative test

• Reverts if the order has been canceled.

  Negative test

• Reverts if the signature is invalid.

  Negative test

• Reverts if the caller is not matched with the taker or the order is not opened for all.

  Negative test

• Reverts if the order has expired.

  Negative test

Function call analysis

• ISilicaIndex(order.offeredLongSharesParams.index).decimals()

  • What is controllable? Address of order.offeredLongSharesParams.index.

  • If the return value is controllable, how is it used and how can it go wrong? Manipulating the return value can affect the state of the pool.

• ISilicaIndex(order.requestedLongSharesParams.index).decimals()

  • What is controllable? Address of order.requestedLongSharesParams.index.

  • If the return value is controllable, how is it used and how can it go wrong? Manipulating the return value can affect the state of the pool.