Gas Optimizations

[code423n4]

1. https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/ReentrancyGuarded.sol#L2
   Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1a) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/PolicyManager.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1b) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/ERC1967Proxy.sol#L3
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1c) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/matchingPolicies/StandardPolicyERC1155.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1d) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/matchingPolicies/StandardPolicyERC721.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1e) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/ExecutionDelegate.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1f) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/EIP712.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1g) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/BlurExchange.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1h) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/MerkleVerifier.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

• 1i) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/OrderStructs.sol#L2
  Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0

2. https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/ReentrancyGuarded.sol#L10
   boolean values use more gas than uint's so use uint256's instead of boolean values to depict true and false states. This will save gas in the long run as the Change to a modified solidity pragma, instead of hardcoded to 0.8.13, e.g. ^0.8.0 is ran more.

3. https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/PolicyManager.sol#L77
   use ++i instead of i++ to save gas

• 3a) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/EIP712.sol#L77
  use ++i instead of i++ to save gas

• 3b) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/BlurExchange.sol#L199
  use ++i instead of i++ to save gas

• 3c) https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/lib/MerkleVerifier.sol#L38
  use ++i instead of i++ to save gas

4. https://github.com/code-423n4/2022-10-blur/blob/2fdaa6e13b544c8c11d1c022a575f16c3a72e3bf/contracts/BlurExchange.sol#L57-L59
   change public to external to save gas

[GalloDaSballo]

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