WIP: BalancerV3

CHANGELOG.md

@@ -45,8 +45,9 @@ Master list of UniV3 forks:
   * `UNISWAPV4`, `UNISWAPV4_VIP`, and `METATXN_UNISWAPV4_VIP`
   * See comments in [UniswapV4.sol](src/core/UniswapV4.sol) regarding how to
     encode `fills`
-  * See comments in [UniswapV4.sol](src/core/UniswapV4.sol) regarding how to
-    compute a perfect token hash function
+  * See comments in
+    [FlashAccountingCommon.sol](src/core/FlashAccountingCommon.sol) regarding
+    how to compute a perfect token hash function
 * Add `msgSender()(address)` accessor on Base to retrieve the current taker
 * Improve accuracy, gas, and convergence region coverage in SolidlyV1/VelodromeV2 action (`VELODROME`)
 * Add DodoV1 actions to more chains
@@ -59,6 +60,13 @@ Master list of UniV3 forks:
 * Add `rebateClaimer()(address)` function on Mainnet Settlers for gas rebate program
 * Add SolidlyV3 UniV3 fork to Sonic
 * Add Wagmi UniV3 fork to Sonic
+* Add actions for BalancerV3
+  * `BALANCERV3`, `BALANCERV3_VIP`, and `METATXN_BALANCERV3_VIP`
+  * See comments in [BalancerV3.sol](src/core/BalancerV3.sol) regarding how to
+    encode `fills`
+  * See comments in
+    [FlashAccountingCommon.sol](src/core/FlashAccountingCommon.sol) regarding
+    how to compute a perfect token hash function
 
 ## 2024-12-18
 

src/ISettlerActions.sol

@@ -74,6 +74,36 @@ interface ISettlerActions {
         uint256 amountOutMin
     ) external;
 
+    function BALANCERV3(
+        address recipient,
+        address sellToken,
+        uint256 bps,
+        bool feeOnTransfer,
+        uint256 hashMul,
+        uint256 hashMod,
+        bytes memory fills,
+        uint256 amountOutMin
+    ) external;
+    function BALANCERV3_VIP(
+        address recipient,
+        bool feeOnTransfer,
+        uint256 hashMul,
+        uint256 hashMod,
+        bytes memory fills,
+        ISignatureTransfer.PermitTransferFrom memory permit,
+        bytes memory sig,
+        uint256 amountOutMin
+    ) external;
+    function METATXN_BALANCERV3_VIP(
+        address recipient,
+        bool feeOnTransfer,
+        uint256 hashMul,
+        uint256 hashMod,
+        bytes memory fills,
+        ISignatureTransfer.PermitTransferFrom memory permit,
+        uint256 amountOutMin
+    ) external;
+
     /// @dev Trades against UniswapV3 using the contracts balance for funding
     // Pre-req: Funded
     // Post-req: Payout

src/chains/Mainnet/Common.sol

@@ -10,6 +10,7 @@ import {CurveTricrypto} from "../../core/CurveTricrypto.sol";
 import {DodoV1, IDodoV1} from "../../core/DodoV1.sol";
 import {DodoV2, IDodoV2} from "../../core/DodoV2.sol";
 import {UniswapV4} from "../../core/UniswapV4.sol";
+import {BalancerV3} from "../../core/BalancerV3.sol";
 import {FreeMemory} from "../../utils/FreeMemory.sol";
 
 import {ISettlerActions} from "../../ISettlerActions.sol";
@@ -50,7 +51,8 @@ abstract contract MainnetMixin is
     CurveTricrypto,
     DodoV1,
     DodoV2,
-    UniswapV4
+    UniswapV4,
+    BalancerV3
 {
     constructor() {
         assert(block.chainid == 1 || block.chainid == 31337);
@@ -83,6 +85,19 @@ abstract contract MainnetMixin is
                 abi.decode(data, (address, uint256, bool, uint256));
 
             sellToMakerPsm(recipient, bps, buyGem, amountOutMin);
+        } else if (action == uint32(ISettlerActions.BALANCERV3.selector)) {
+            (
+                address recipient,
+                IERC20 sellToken,
+                uint256 bps,
+                bool feeOnTransfer,
+                uint256 hashMul,
+                uint256 hashMod,
+                bytes memory fills,
+                uint256 amountOutMin
+            ) = abi.decode(data, (address, IERC20, uint256, bool, uint256, uint256, bytes, uint256));
+
+            sellToBalancerV3(recipient, sellToken, bps, feeOnTransfer, hashMul, hashMod, fills, amountOutMin);
         } else if (action == uint32(ISettlerActions.MAVERICKV2.selector)) {
             (
                 address recipient,

src/chains/Mainnet/MetaTxn.sol

@@ -25,7 +25,7 @@ contract MainnetSettlerMetaTxn is SettlerMetaTxn, MainnetMixin {
     {
         if (super._dispatchVIP(action, data, sig)) {
             return true;
-        } else if (action == uint32(ISettlerActions.UNISWAPV4_VIP.selector)) {
+        } else if (action == uint32(ISettlerActions.METATXN_UNISWAPV4_VIP.selector)) {
             (
                 address recipient,
                 bool feeOnTransfer,
@@ -39,6 +39,20 @@ contract MainnetSettlerMetaTxn is SettlerMetaTxn, MainnetMixin {
             );
 
             sellToUniswapV4VIP(recipient, feeOnTransfer, hashMul, hashMod, fills, permit, sig, amountOutMin);
+        } else if (action == uint32(ISettlerActions.METATXN_BALANCERV3_VIP.selector)) {
+            (
+                address recipient,
+                bool feeOnTransfer,
+                uint256 hashMul,
+                uint256 hashMod,
+                bytes memory fills,
+                ISignatureTransfer.PermitTransferFrom memory permit,
+                uint256 amountOutMin
+            ) = abi.decode(
+                data, (address, bool, uint256, uint256, bytes, ISignatureTransfer.PermitTransferFrom, uint256)
+            );
+
+            sellToBalancerV3VIP(recipient, feeOnTransfer, hashMul, hashMod, fills, permit, sig, amountOutMin);
         } else if (action == uint32(ISettlerActions.METATXN_MAVERICKV2_VIP.selector)) {
             (
                 address recipient,

src/chains/Mainnet/TakerSubmitted.sol

@@ -36,6 +36,21 @@ contract MainnetSettler is Settler, MainnetMixin {
             );
 
             sellToUniswapV4VIP(recipient, feeOnTransfer, hashMul, hashMod, fills, permit, sig, amountOutMin);
+        } else if (action == uint32(ISettlerActions.BALANCERV3_VIP.selector)) {
+            (
+                address recipient,
+                bool feeOnTransfer,
+                uint256 hashMul,
+                uint256 hashMod,
+                bytes memory fills,
+                ISignatureTransfer.PermitTransferFrom memory permit,
+                bytes memory sig,
+                uint256 amountOutMin
+            ) = abi.decode(
+                data, (address, bool, uint256, uint256, bytes, ISignatureTransfer.PermitTransferFrom, bytes, uint256)
+            );
+
+            sellToBalancerV3VIP(recipient, feeOnTransfer, hashMul, hashMod, fills, permit, sig, amountOutMin);
         } else if (action == uint32(ISettlerActions.MAVERICKV2_VIP.selector)) {
             (
                 address recipient,