feat: accept initial platform-fee config in SWAP2 constructor

src/SWAP2.sol

@@ -38,8 +38,11 @@ contract SWAP2Deployer is
      * @param initialOwner Initial owner of the contract. SHOULD be a multisig as this address can modify platform-fee
      * configuration.
      */
-    constructor(address initialOwner, Escrow escrow_) Ownable(initialOwner) {
+    constructor(address initialOwner, Escrow escrow_, address payable feeRecipient, uint16 feeBasisPoints)
+        Ownable(initialOwner)
+    {
         escrow = escrow_;
+        _setPlatformFee(feeRecipient, feeBasisPoints);
     }
 
     /// @dev Packs platform-fee configuration into a single word.
@@ -60,6 +63,10 @@ contract SWAP2Deployer is
      * @param basisPoints One-hundredths of a percentage point of swap consideration to charge as a platform fee.
      */
     function setPlatformFee(address payable recipient, uint16 basisPoints) external onlyOwner {
+        _setPlatformFee(recipient, basisPoints);
+    }
+
+    function _setPlatformFee(address payable recipient, uint16 basisPoints) private {
         feeConfig = PlatformFeeConfig({recipient: recipient, basisPoints: basisPoints});
     }
 
@@ -103,7 +110,9 @@ contract SWAP2Proposer is SWAP2ProposerBase {
 
 /// @notice A combined SWAP2{Deployer,Proposer}.
 contract SWAP2 is SWAP2Deployer, SWAP2ProposerBase {
-    constructor(address initialOwner, Escrow escrow) SWAP2Deployer(initialOwner, escrow) {}
+    constructor(address initialOwner, Escrow escrow, address payable feeRecipient, uint16 feeBasisPoints)
+        SWAP2Deployer(initialOwner, escrow, feeRecipient, feeBasisPoints)
+    {}
 
     /// @dev The current contract is the swapper deployer for all types.
     function _swapperDeployer() internal view override returns (address) {

test/Owner.t.sol

@@ -15,7 +15,7 @@ contract OwnerTest is Test {
         vm.assume(initial != address(0));
         vm.assume(newOwner != address(0));
 
-        SWAP2 s = new SWAP2(initial, new Escrow());
+        SWAP2 s = new SWAP2(initial, new Escrow(), payable(0), 0);
 
         vm.prank(initial);
         s.transferOwnership(newOwner);
@@ -34,7 +34,7 @@ contract OwnerTest is Test {
         vm.assume(owner != address(0));
         vm.assume(owner != vandal);
 
-        SWAP2 s = new SWAP2(owner, new Escrow());
+        SWAP2 s = new SWAP2(owner, new Escrow(), payable(0), 0);
 
         vm.expectRevert(abi.encodeWithSelector(Ownable.OwnableUnauthorizedAccount.selector, vandal));
         vm.prank(vandal);

test/SwapperTestBase.t.sol

@@ -70,7 +70,7 @@ abstract contract SwapperTestBase is Test, ITestEvents {
     address immutable owner = makeAddr("owner");
 
     function setUp() public virtual {
-        factory = new SWAP2(owner, new Escrow());
+        factory = new SWAP2(owner, new Escrow(), payable(0), 0);
         vm.label(address(factory), "SWAP2");
         token = new Token();
         vm.label(address(token), "FakeERC721");