Gas Optimizations

[code423n4]

Inverse Finance GAS optimizatoins

use an optimized version of the minimal proxy bytecode

This is the bytecode used for minimal proxy address prediction and deployment in createEscrow() and predictEscrow():

function createEscrow(address user) internal returns (IEscrow instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, user)
        }
        require(instance != IEscrow(address(0)), "ERC1167: create2 failed");
        emit CreateEscrow(user, address(instance));
    }

It is based on the OpenZeppeling code which has been recently updated to a somewhat more optimized version.

[c4-judge]

0xean marked the issue as grade-c