rebased dev and merged

contracts/zero-ex/contracts/src/transformers/bridges/BridgeAdapter.sol

@@ -34,6 +34,7 @@ import "./mixins/MixinCurveV2.sol";
 import "./mixins/MixinCryptoCom.sol";
 import "./mixins/MixinDodo.sol";
 import "./mixins/MixinDodoV2.sol";
+import "./mixins/MixinGMX.sol";
 import "./mixins/MixinKyber.sol";
 import "./mixins/MixinKyberDmm.sol";
 import "./mixins/MixinLido.sol";
@@ -42,6 +43,7 @@ import "./mixins/MixinMooniswap.sol";
 import "./mixins/MixinMStable.sol";
 import "./mixins/MixinNerve.sol";
 import "./mixins/MixinOasis.sol";
+import "./mixins/MixinPlatypus.sol";
 import "./mixins/MixinShell.sol";
 import "./mixins/MixinUniswap.sol";
 import "./mixins/MixinUniswapV2.sol";
@@ -62,6 +64,7 @@ contract BridgeAdapter is
     MixinCryptoCom,
     MixinDodo,
     MixinDodoV2,
+    MixinGMX,
     MixinKyber,
     MixinKyberDmm,
     MixinLido,
@@ -70,6 +73,7 @@ contract BridgeAdapter is
     MixinMStable,
     MixinNerve,
     MixinOasis,
+    MixinPlatypus,
     MixinShell,
     MixinUniswap,
     MixinUniswapV2,
@@ -89,6 +93,7 @@ contract BridgeAdapter is
         MixinCryptoCom()
         MixinDodo()
         MixinDodoV2()
+        MixinGMX()
         MixinKyber(weth)
         MixinLido(weth)
         MixinMakerPSM()
@@ -96,6 +101,7 @@ contract BridgeAdapter is
         MixinMStable()
         MixinNerve()
         MixinOasis()
+        MixinPlatypus()
         MixinShell()
         MixinUniswap(weth)
         MixinUniswapV2()
@@ -272,6 +278,18 @@ contract BridgeAdapter is
                 sellAmount,
                 order.bridgeData
             );
+        } else if (protocolId == BridgeProtocols.GMX) {
+            boughtAmount = _tradeGMX(
+                buyToken,
+                sellAmount,
+                order.bridgeData
+            );
+        } else if (protocolId == BridgeProtocols.PLATYPUS) {
+            boughtAmount = _tradePlatypus(
+                buyToken,
+                sellAmount,
+                order.bridgeData
+            );
         } else {
             boughtAmount = _tradeZeroExBridge(
                 sellToken,

contracts/zero-ex/contracts/src/transformers/bridges/BridgeProtocols.sol

@@ -53,4 +53,6 @@ library BridgeProtocols {
     uint128 internal constant AAVEV2          = 23;
     uint128 internal constant COMPOUND        = 24;
     uint128 internal constant BALANCERV2BATCH = 25;
+    uint128 internal constant GMX             = 26;
+    uint128 internal constant PLATYPUS        = 27;
 }

contracts/zero-ex/contracts/src/transformers/bridges/mixins/MixinGMX.sol

@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: Apache-2.0
+
+/*
+  Copyright 2020 ZeroEx Intl.
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-erc20/contracts/src/v06/LibERC20TokenV06.sol";
+import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
+import "@0x/contracts-utils/contracts/src/v06/LibSafeMathV06.sol";
+import "../IBridgeAdapter.sol";
+
+/*
+    UniswapV2
+*/
+interface IGmxRouter {
+
+    // /// @dev Swaps an exact amount of input tokens for as many output tokens as possible, along the route determined by the path.
+    // ///      The first element of path is the input token, the last is the output token, and any intermediate elements represent
+    // ///      intermediate pairs to trade through (if, for example, a direct pair does not exist).
+    // /// @param _path An array of token addresses. path.length must be >= 2. Pools for each consecutive pair of addresses must exist and have liquidity.
+    // /// @param _amountIn The amount of input tokens to send.
+    // /// @param _minOut The minimum amount of output tokens that must be received for the transaction not to revert.
+    // /// @param _reciever Recipient of the output tokens.
+    function swap(
+       address[] calldata _path, uint256 _amountIn, uint256 _minOut, address _receiver
+    ) external;
+}
+
+contract MixinGMX {
+
+    using LibERC20TokenV06 for IERC20TokenV06;
+    using LibSafeMathV06 for uint256;
+
+    function _tradeGMX(
+        IERC20TokenV06 buyToken,
+        uint256 sellAmount,
+        bytes memory bridgeData
+    )
+        public
+        returns (uint256 boughtAmount)
+    {
+        address _router;
+        address reader;
+        address vault;
+        address[] memory _path;
+        IGmxRouter router;
+        IERC20TokenV06[] memory path;
+
+        {
+            //decode the bridge data
+            (_router, reader, vault, _path) = abi.decode(bridgeData, (address, address, address, address[]));
+            // To get around `abi.decode()` not supporting interface array types.
+            assembly { path := _path }
+        }
+
+        require(path.length >= 2, "MixinGMX/PATH_LENGTH_MUST_BE_AT_LEAST_TWO");
+        require(
+            path[path.length - 1] == buyToken,
+            "MixinGMX/LAST_ELEMENT_OF_PATH_MUST_MATCH_OUTPUT_TOKEN"
+        );
+
+        //connect to the GMX router
+        router = IGmxRouter(_router);
+
+        // Grant the GMX router an allowance to sell the first token.
+        path[0].approveIfBelow(address(router), sellAmount);
+
+        //track the balance to know how much we bought
+        uint256 beforeBalance = buyToken.balanceOf(address(this));
+        router.swap(
+            // Convert to `buyToken` along this path.
+            _path,
+             // Sell all tokens we hold.
+            sellAmount,
+             // Minimum buy amount.
+            0,
+            // Recipient is `this`.
+            address(this)
+        );
+
+        //calculate the difference in balance from preswap->postswap to find how many tokens out
+        boughtAmount = buyToken.balanceOf(address(this)).safeSub(beforeBalance);
+
+        return boughtAmount;
+    }
+}

contracts/zero-ex/contracts/src/transformers/bridges/mixins/MixinPlatypus.sol

@@ -0,0 +1,78 @@
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-erc20/contracts/src/v06/LibERC20TokenV06.sol";
+import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
+import "@0x/contracts-utils/contracts/src/v06/LibSafeMathV06.sol";
+import "../IBridgeAdapter.sol";
+
+
+interface IPlatypusRouter {
+
+    function swapTokensForTokens(
+        address[] calldata tokenPath,
+        address[] calldata poolPath,
+        uint256 fromAmount,
+        uint256 minimumToAmount,
+        address to,
+        uint256 deadline
+    ) external returns (uint256 amountOut, uint256 haircut);
+}
+
+contract MixinPlatypus {
+
+    using LibERC20TokenV06 for IERC20TokenV06;
+    using LibSafeMathV06 for uint256;
+
+    function _tradePlatypus(
+        IERC20TokenV06 buyToken,
+        uint256 sellAmount,
+        bytes memory bridgeData
+    )
+        public
+        returns (uint256 boughtAmount)
+    {
+        IPlatypusRouter router;
+        address _router;
+        address[] memory _pool;
+        IERC20TokenV06[] memory path;
+        address[] memory _path;
+
+        {
+            (_router, _pool, _path) = abi.decode(bridgeData, (address, address[], address[]));
+
+            // To get around `abi.decode()` not supporting interface array types.
+            assembly { path := _path }
+        }
+
+        router = IPlatypusRouter(_router);
+        //corresponding platypus asset pool for the ERC20's in the path
+
+        require(path.length >= 2, "MixinPlatypus/PATH_LENGTH_MUST_BE_AT_LEAST_TWO");
+        require(
+            path[path.length - 1] == buyToken,
+            "MixinPlatypus/LAST_ELEMENT_OF_PATH_MUST_MATCH_OUTPUT_TOKEN"
+        );
+        // Grant the Platypus router an allowance to sell the first token.
+        path[0].approveIfBelow(address(router), sellAmount);
+
+        uint256 beforeBalance = buyToken.balanceOf(address(this));
+
+        (uint256 amountOut, uint256 haircut) = router.swapTokensForTokens(
+            // Convert to `buyToken` along this path.
+            _path,
+            //
+            _pool,
+             // Sell all tokens we hold.
+            sellAmount,
+             // Minimum buy amount.
+            0,
+            // Recipient is `this`.
+            address(this),
+
+            block.timestamp + 10000
+        );
+        boughtAmount = buyToken.balanceOf(address(this)).safeSub(beforeBalance);
+        return boughtAmount;
+    }
+}

contracts/zero-ex/package.json

@@ -43,7 +43,7 @@
     "config": {
         "publicInterfaceContracts": "IZeroEx,ZeroEx,FullMigration,InitialMigration,IFlashWallet,IERC20Transformer,IOwnableFeature,ISimpleFunctionRegistryFeature,ITransformERC20Feature,FillQuoteTransformer,PayTakerTransformer,PositiveSlippageFeeTransformer,WethTransformer,OwnableFeature,SimpleFunctionRegistryFeature,TransformERC20Feature,AffiliateFeeTransformer,MetaTransactionsFeature,LogMetadataTransformer,BridgeAdapter,LiquidityProviderFeature,ILiquidityProviderFeature,NativeOrdersFeature,INativeOrdersFeature,FeeCollectorController,FeeCollector,CurveLiquidityProvider,BatchFillNativeOrdersFeature,IBatchFillNativeOrdersFeature,MultiplexFeature,IMultiplexFeature,OtcOrdersFeature,IOtcOrdersFeature",
         "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually.",
-        "abis": "./test/generated-artifacts/@(AffiliateFeeTransformer|BatchFillNativeOrdersFeature|BootstrapFeature|BridgeAdapter|BridgeProtocols|CurveLiquidityProvider|ERC1155OrdersFeature|ERC165Feature|ERC721OrdersFeature|FeeCollector|FeeCollectorController|FillQuoteTransformer|FixinCommon|FixinEIP712|FixinERC1155Spender|FixinERC721Spender|FixinProtocolFees|FixinReentrancyGuard|FixinTokenSpender|FlashWallet|FullMigration|FundRecoveryFeature|IBatchFillNativeOrdersFeature|IBootstrapFeature|IBridgeAdapter|IERC1155OrdersFeature|IERC1155Token|IERC165Feature|IERC20Bridge|IERC20Transformer|IERC721OrdersFeature|IERC721Token|IFeature|IFeeRecipient|IFlashWallet|IFundRecoveryFeature|ILiquidityProvider|ILiquidityProviderFeature|ILiquidityProviderSandbox|IMetaTransactionsFeature|IMooniswapPool|IMultiplexFeature|INativeOrdersEvents|INativeOrdersFeature|IOtcOrdersFeature|IOwnableFeature|IPancakeSwapFeature|IPropertyValidator|ISimpleFunctionRegistryFeature|IStaking|ITakerCallback|ITestSimpleFunctionRegistryFeature|ITokenSpenderFeature|ITransformERC20Feature|IUniswapFeature|IUniswapV2Pair|IUniswapV3Feature|IUniswapV3Pool|IZeroEx|InitialMigration|LibBootstrap|LibCommonRichErrors|LibERC1155OrdersStorage|LibERC20Transformer|LibERC721OrdersStorage|LibFeeCollector|LibLiquidityProviderRichErrors|LibMetaTransactionsRichErrors|LibMetaTransactionsStorage|LibMigrate|LibNFTOrder|LibNFTOrdersRichErrors|LibNativeOrder|LibNativeOrdersRichErrors|LibNativeOrdersStorage|LibOtcOrdersStorage|LibOwnableRichErrors|LibOwnableStorage|LibProxyRichErrors|LibProxyStorage|LibReentrancyGuardStorage|LibSignature|LibSignatureRichErrors|LibSimpleFunctionRegistryRichErrors|LibSimpleFunctionRegistryStorage|LibStorage|LibTransformERC20RichErrors|LibTransformERC20Storage|LibWalletRichErrors|LiquidityProviderFeature|LiquidityProviderSandbox|LogMetadataTransformer|MetaTransactionsFeature|MixinAaveV2|MixinBalancer|MixinBalancerV2|MixinBalancerV2Batch|MixinBancor|MixinCoFiX|MixinCompound|MixinCryptoCom|MixinCurve|MixinCurveV2|MixinDodo|MixinDodoV2|MixinKyber|MixinKyberDmm|MixinLido|MixinMStable|MixinMakerPSM|MixinMooniswap|MixinNerve|MixinOasis|MixinShell|MixinUniswap|MixinUniswapV2|MixinUniswapV3|MixinZeroExBridge|MooniswapLiquidityProvider|MultiplexFeature|MultiplexLiquidityProvider|MultiplexOtc|MultiplexRfq|MultiplexTransformERC20|MultiplexUniswapV2|MultiplexUniswapV3|NFTOrders|NativeOrdersCancellation|NativeOrdersFeature|NativeOrdersInfo|NativeOrdersProtocolFees|NativeOrdersSettlement|OtcOrdersFeature|OwnableFeature|PancakeSwapFeature|PayTakerTransformer|PermissionlessTransformerDeployer|PositiveSlippageFeeTransformer|SimpleFunctionRegistryFeature|TestBridge|TestCallTarget|TestCurve|TestDelegateCaller|TestFeeCollectorController|TestFeeRecipient|TestFillQuoteTransformerBridge|TestFillQuoteTransformerExchange|TestFillQuoteTransformerHost|TestFixinProtocolFees|TestFixinTokenSpender|TestFullMigration|TestInitialMigration|TestLibNativeOrder|TestLibSignature|TestLiquidityProvider|TestMetaTransactionsNativeOrdersFeature|TestMetaTransactionsTransformERC20Feature|TestMigrator|TestMintTokenERC20Transformer|TestMintableERC1155Token|TestMintableERC20Token|TestMintableERC721Token|TestMooniswap|TestNFTOrderPresigner|TestNativeOrdersFeature|TestNoEthRecipient|TestOrderSignerRegistryWithContractWallet|TestPermissionlessTransformerDeployerSuicidal|TestPermissionlessTransformerDeployerTransformer|TestPropertyValidator|TestRfqOriginRegistration|TestSimpleFunctionRegistryFeatureImpl1|TestSimpleFunctionRegistryFeatureImpl2|TestStaking|TestTokenSpenderERC20Token|TestTransformERC20|TestTransformerBase|TestTransformerDeployerTransformer|TestTransformerHost|TestUniswapV2Factory|TestUniswapV2Pool|TestUniswapV3Factory|TestUniswapV3Feature|TestUniswapV3Pool|TestWeth|TestWethTransformerHost|TestZeroExFeature|TransformERC20Feature|Transformer|TransformerDeployer|UniswapFeature|UniswapV3Feature|WethTransformer|ZeroEx|ZeroExOptimized).json"
+        "abis": "./test/generated-artifacts/@(AffiliateFeeTransformer|BatchFillNativeOrdersFeature|BootstrapFeature|BridgeAdapter|BridgeProtocols|CurveLiquidityProvider|ERC1155OrdersFeature|ERC165Feature|ERC721OrdersFeature|FeeCollector|FeeCollectorController|FillQuoteTransformer|FixinCommon|FixinEIP712|FixinERC1155Spender|FixinERC721Spender|FixinProtocolFees|FixinReentrancyGuard|FixinTokenSpender|FlashWallet|FullMigration|FundRecoveryFeature|IBatchFillNativeOrdersFeature|IBootstrapFeature|IBridgeAdapter|IERC1155OrdersFeature|IERC1155Token|IERC165Feature|IERC20Bridge|IERC20Transformer|IERC721OrdersFeature|IERC721Token|IFeature|IFeeRecipient|IFlashWallet|IFundRecoveryFeature|ILiquidityProvider|ILiquidityProviderFeature|ILiquidityProviderSandbox|IMetaTransactionsFeature|IMooniswapPool|IMultiplexFeature|INativeOrdersEvents|INativeOrdersFeature|IOtcOrdersFeature|IOwnableFeature|IPancakeSwapFeature|IPropertyValidator|ISimpleFunctionRegistryFeature|IStaking|ITakerCallback|ITestSimpleFunctionRegistryFeature|ITokenSpenderFeature|ITransformERC20Feature|IUniswapFeature|IUniswapV2Pair|IUniswapV3Feature|IUniswapV3Pool|IZeroEx|InitialMigration|LibBootstrap|LibCommonRichErrors|LibERC1155OrdersStorage|LibERC20Transformer|LibERC721OrdersStorage|LibFeeCollector|LibLiquidityProviderRichErrors|LibMetaTransactionsRichErrors|LibMetaTransactionsStorage|LibMigrate|LibNFTOrder|LibNFTOrdersRichErrors|LibNativeOrder|LibNativeOrdersRichErrors|LibNativeOrdersStorage|LibOtcOrdersStorage|LibOwnableRichErrors|LibOwnableStorage|LibProxyRichErrors|LibProxyStorage|LibReentrancyGuardStorage|LibSignature|LibSignatureRichErrors|LibSimpleFunctionRegistryRichErrors|LibSimpleFunctionRegistryStorage|LibStorage|LibTransformERC20RichErrors|LibTransformERC20Storage|LibWalletRichErrors|LiquidityProviderFeature|LiquidityProviderSandbox|LogMetadataTransformer|MetaTransactionsFeature|MixinAaveV2|MixinBalancer|MixinBalancerV2|MixinBalancerV2Batch|MixinBancor|MixinCoFiX|MixinCompound|MixinCryptoCom|MixinCurve|MixinCurveV2|MixinDodo|MixinDodoV2|MixinGMX|MixinKyber|MixinKyberDmm|MixinLido|MixinMStable|MixinMakerPSM|MixinMooniswap|MixinNerve|MixinOasis|MixinPlatypus|MixinShell|MixinUniswap|MixinUniswapV2|MixinUniswapV3|MixinZeroExBridge|MooniswapLiquidityProvider|MultiplexFeature|MultiplexLiquidityProvider|MultiplexOtc|MultiplexRfq|MultiplexTransformERC20|MultiplexUniswapV2|MultiplexUniswapV3|NFTOrders|NativeOrdersCancellation|NativeOrdersFeature|NativeOrdersInfo|NativeOrdersProtocolFees|NativeOrdersSettlement|OtcOrdersFeature|OwnableFeature|PancakeSwapFeature|PayTakerTransformer|PermissionlessTransformerDeployer|PositiveSlippageFeeTransformer|SimpleFunctionRegistryFeature|TestBridge|TestCallTarget|TestCurve|TestDelegateCaller|TestFeeCollectorController|TestFeeRecipient|TestFillQuoteTransformerBridge|TestFillQuoteTransformerExchange|TestFillQuoteTransformerHost|TestFixinProtocolFees|TestFixinTokenSpender|TestFullMigration|TestInitialMigration|TestLibNativeOrder|TestLibSignature|TestLiquidityProvider|TestMetaTransactionsNativeOrdersFeature|TestMetaTransactionsTransformERC20Feature|TestMigrator|TestMintTokenERC20Transformer|TestMintableERC1155Token|TestMintableERC20Token|TestMintableERC721Token|TestMooniswap|TestNFTOrderPresigner|TestNativeOrdersFeature|TestNoEthRecipient|TestOrderSignerRegistryWithContractWallet|TestPermissionlessTransformerDeployerSuicidal|TestPermissionlessTransformerDeployerTransformer|TestPropertyValidator|TestRfqOriginRegistration|TestSimpleFunctionRegistryFeatureImpl1|TestSimpleFunctionRegistryFeatureImpl2|TestStaking|TestTokenSpenderERC20Token|TestTransformERC20|TestTransformerBase|TestTransformerDeployerTransformer|TestTransformerHost|TestUniswapV2Factory|TestUniswapV2Pool|TestUniswapV3Factory|TestUniswapV3Feature|TestUniswapV3Pool|TestWeth|TestWethTransformerHost|TestZeroExFeature|TransformERC20Feature|Transformer|TransformerDeployer|UniswapFeature|UniswapV3Feature|WethTransformer|ZeroEx|ZeroExOptimized).json"
     },
     "repository": {
         "type": "git",

contracts/zero-ex/test/artifacts.ts

@@ -110,6 +110,7 @@ import * as MixinCurve from '../test/generated-artifacts/MixinCurve.json';
 import * as MixinCurveV2 from '../test/generated-artifacts/MixinCurveV2.json';
 import * as MixinDodo from '../test/generated-artifacts/MixinDodo.json';
 import * as MixinDodoV2 from '../test/generated-artifacts/MixinDodoV2.json';
+import * as MixinGMX from '../test/generated-artifacts/MixinGMX.json';
 import * as MixinKyber from '../test/generated-artifacts/MixinKyber.json';
 import * as MixinKyberDmm from '../test/generated-artifacts/MixinKyberDmm.json';
 import * as MixinLido from '../test/generated-artifacts/MixinLido.json';
@@ -118,6 +119,7 @@ import * as MixinMooniswap from '../test/generated-artifacts/MixinMooniswap.json
 import * as MixinMStable from '../test/generated-artifacts/MixinMStable.json';
 import * as MixinNerve from '../test/generated-artifacts/MixinNerve.json';
 import * as MixinOasis from '../test/generated-artifacts/MixinOasis.json';
+import * as MixinPlatypus from '../test/generated-artifacts/MixinPlatypus.json';
 import * as MixinShell from '../test/generated-artifacts/MixinShell.json';
 import * as MixinUniswap from '../test/generated-artifacts/MixinUniswap.json';
 import * as MixinUniswapV2 from '../test/generated-artifacts/MixinUniswapV2.json';
@@ -323,6 +325,7 @@ export const artifacts = {
     MixinCurveV2: MixinCurveV2 as ContractArtifact,
     MixinDodo: MixinDodo as ContractArtifact,
     MixinDodoV2: MixinDodoV2 as ContractArtifact,
+    MixinGMX: MixinGMX as ContractArtifact,
     MixinKyber: MixinKyber as ContractArtifact,
     MixinKyberDmm: MixinKyberDmm as ContractArtifact,
     MixinLido: MixinLido as ContractArtifact,
@@ -331,6 +334,7 @@ export const artifacts = {
     MixinMooniswap: MixinMooniswap as ContractArtifact,
     MixinNerve: MixinNerve as ContractArtifact,
     MixinOasis: MixinOasis as ContractArtifact,
+    MixinPlatypus: MixinPlatypus as ContractArtifact,
     MixinShell: MixinShell as ContractArtifact,
     MixinUniswap: MixinUniswap as ContractArtifact,
     MixinUniswapV2: MixinUniswapV2 as ContractArtifact,

contracts/zero-ex/test/wrappers.ts

@@ -108,6 +108,7 @@ export * from '../test/generated-wrappers/mixin_curve';
 export * from '../test/generated-wrappers/mixin_curve_v2';
 export * from '../test/generated-wrappers/mixin_dodo';
 export * from '../test/generated-wrappers/mixin_dodo_v2';
+export * from '../test/generated-wrappers/mixin_g_m_x';
 export * from '../test/generated-wrappers/mixin_kyber';
 export * from '../test/generated-wrappers/mixin_kyber_dmm';
 export * from '../test/generated-wrappers/mixin_lido';
@@ -116,6 +117,7 @@ export * from '../test/generated-wrappers/mixin_maker_p_s_m';
 export * from '../test/generated-wrappers/mixin_mooniswap';
 export * from '../test/generated-wrappers/mixin_nerve';
 export * from '../test/generated-wrappers/mixin_oasis';
+export * from '../test/generated-wrappers/mixin_platypus';
 export * from '../test/generated-wrappers/mixin_shell';
 export * from '../test/generated-wrappers/mixin_uniswap';
 export * from '../test/generated-wrappers/mixin_uniswap_v2';

contracts/zero-ex/tsconfig.json

@@ -141,6 +141,7 @@
         "test/generated-artifacts/MixinCurveV2.json",
         "test/generated-artifacts/MixinDodo.json",
         "test/generated-artifacts/MixinDodoV2.json",
+        "test/generated-artifacts/MixinGMX.json",
         "test/generated-artifacts/MixinKyber.json",
         "test/generated-artifacts/MixinKyberDmm.json",
         "test/generated-artifacts/MixinLido.json",
@@ -149,6 +150,7 @@
         "test/generated-artifacts/MixinMooniswap.json",
         "test/generated-artifacts/MixinNerve.json",
         "test/generated-artifacts/MixinOasis.json",
+        "test/generated-artifacts/MixinPlatypus.json",
         "test/generated-artifacts/MixinShell.json",
         "test/generated-artifacts/MixinUniswap.json",
         "test/generated-artifacts/MixinUniswapV2.json",

packages/asset-swapper/contracts/src/ERC20BridgeSampler.sol

@@ -28,6 +28,7 @@ import "./CompoundSampler.sol";
 import "./CurveSampler.sol";
 import "./DODOSampler.sol";
 import "./DODOV2Sampler.sol";
+import "./GMXSampler.sol";
 import "./KyberSampler.sol";
 import "./KyberDmmSampler.sol";
 import "./LidoSampler.sol";
@@ -36,6 +37,7 @@ import "./MakerPSMSampler.sol";
 import "./MStableSampler.sol";
 import "./MooniswapSampler.sol";
 import "./NativeOrderSampler.sol";
+import "./PlatypusSampler.sol";
 import "./ShellSampler.sol";
 import "./SmoothySampler.sol";
 import "./TwoHopSampler.sol";
@@ -54,6 +56,7 @@ contract ERC20BridgeSampler is
     CurveSampler,
     DODOSampler,
     DODOV2Sampler,
+    GMXSampler,
     KyberSampler,
     KyberDmmSampler,
     LidoSampler,
@@ -62,6 +65,7 @@ contract ERC20BridgeSampler is
     MStableSampler,
     MooniswapSampler,
     NativeOrderSampler,
+    PlatypusSampler,
     ShellSampler,
     SmoothySampler,
     TwoHopSampler,

packages/asset-swapper/contracts/src/GMXSampler.sol

@@ -0,0 +1,98 @@
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "./interfaces/IGMX.sol";
+import "./ApproximateBuys.sol";
+import "./SamplerUtils.sol";
+
+contract GMXSampler is
+    SamplerUtils,
+    ApproximateBuys
+{
+    struct GMXInfo {
+        address reader;
+        address vault;
+        address[] path;
+    }
+    // address immutable WAVAX = 0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7;
+    // address immutable AVAX = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
+
+    function sampleSellsFromGMX(
+        address reader,
+        address vault,
+        address[] memory path,
+        uint256[] memory takerTokenAmounts
+    )
+        public
+        view
+        returns (uint256[] memory makerTokenAmounts)
+    {
+        uint256 numSamples = takerTokenAmounts.length;
+        makerTokenAmounts = new uint256[](numSamples);
+        for (uint256 i = 0; i < numSamples; i++) {
+            try
+                IGMX(reader).getAmountOut(IVault(vault), path[0], path[1], takerTokenAmounts[i])
+                returns (uint256 amountAfterFees, uint256 feeAmount)
+            {
+                makerTokenAmounts[i] = amountAfterFees;
+                // Break early if there are 0 amounts
+                if (makerTokenAmounts[i] == 0) {
+                    break;
+                }
+            } catch (bytes memory) {
+                // Swallow failures, leaving all results as zero.
+                break;
+            }
+        }
+    }
+
+    function sampleBuysFromGMX(
+        address reader,
+        address vault,
+        address[] memory path,
+        uint256[] memory makerTokenAmounts
+    )
+        public
+        view
+        returns (uint256[] memory takerTokenAmounts)
+    {
+        address[] memory invertBuyPath = new address[](2);
+        invertBuyPath[0] = path[1];
+        invertBuyPath[1] = path[0];
+        return _sampleApproximateBuys(
+                ApproximateBuyQuoteOpts({
+                    makerTokenData: abi.encode(reader, vault, invertBuyPath),
+                    takerTokenData: abi.encode(reader, vault, path),
+                    getSellQuoteCallback: _sampleSellForApproximateBuyFromGMX
+                }),
+                makerTokenAmounts
+            );
+    }
+
+
+    function _sampleSellForApproximateBuyFromGMX(
+        bytes memory takerTokenData,
+        bytes memory makerTokenData,
+        uint256 sellAmount
+    )
+        private
+        view
+        returns (uint256 buyAmount)
+    {
+        (address _reader, address _vault, address[] memory _path ) = abi.decode(takerTokenData, (address, address, address[]));
+
+        (bool success, bytes memory resultData) = address(this).staticcall(abi.encodeWithSelector(
+            this.sampleSellsFromGMX.selector,
+            _reader,
+            _vault,
+            _path,
+            _toSingleValueArray(sellAmount)
+        ));
+        if(!success) {
+            return 0;
+        }
+        // solhint-disable-next-line indent
+        return abi.decode(resultData, (uint256[]))[0];
+    }
+
+}

packages/asset-swapper/contracts/src/PlatypusSampler.sol

@@ -0,0 +1,89 @@
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "./interfaces/IPlatypus.sol";
+import "./ApproximateBuys.sol";
+import "./SamplerUtils.sol";
+
+
+contract PlatypusSampler is
+    SamplerUtils,
+    ApproximateBuys
+{
+
+    function sampleSellsFromPlatypus(
+        address pool,
+        address[] memory path,
+        uint256[] memory takerTokenAmounts
+    )
+        public
+        view
+        returns (uint256[] memory makerTokenAmounts)
+    {
+
+        uint256 numSamples = takerTokenAmounts.length;
+        makerTokenAmounts = new uint256[](numSamples);
+        for (uint256 i = 0; i < numSamples; i++) {
+            try
+                IPlatypus(pool).quotePotentialSwap(path[0], path[1], takerTokenAmounts[i])
+                returns (uint256 amountAfterFees, uint256 feeAmount)
+            {
+                makerTokenAmounts[i] = amountAfterFees;
+                // Break early if there are 0 amounts
+                if (makerTokenAmounts[i] == 0) {
+                    break;
+                }
+            } catch (bytes memory result) {
+                // Swallow failures, leaving all results as zero.
+                break;
+            }
+        }
+    }
+
+    function sampleBuysFromPlatypus(
+        address pool,
+        address[] memory path,
+        uint256[] memory makerTokenAmounts
+    )
+        public
+        view
+        returns (uint256[] memory takerTokenAmounts)
+    {
+        address[] memory invertBuyPath = new address[](2);
+        invertBuyPath[0] = path[1];
+        invertBuyPath[1] = path[0];
+        return _sampleApproximateBuys(
+                ApproximateBuyQuoteOpts({
+                    makerTokenData: abi.encode(pool, invertBuyPath),
+                    takerTokenData: abi.encode(pool, path),
+                    getSellQuoteCallback: _sampleSellForApproximateBuyFromPlatypus
+                }),
+                makerTokenAmounts
+            );
+    }
+
+
+    function _sampleSellForApproximateBuyFromPlatypus(
+        bytes memory makerTokenData,
+        bytes memory takerTokenData,
+        uint256 sellAmount
+    )
+        private
+        view
+        returns (uint256 buyAmount)
+    {
+        (address _pool, address[] memory _path ) = abi.decode(makerTokenData, (address, address[]));
+
+        (bool success, bytes memory resultData) = address(this).staticcall(abi.encodeWithSelector(
+            this.sampleSellsFromPlatypus.selector,
+            _pool,
+            _path,
+            _toSingleValueArray(sellAmount)
+        ));
+        if(!success) {
+            return 0;
+        }
+        // solhint-disable-next-line indent
+        return abi.decode(resultData, (uint256[]))[0];
+    }
+}

packages/asset-swapper/contracts/src/interfaces/IGMX.sol

@@ -0,0 +1,23 @@
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+interface IGMX {
+    function getMaxAmountIn(IVault _vault, address _tokenIn, address _tokenOut)
+        external
+        view
+        returns (uint256);
+
+    function getAmountOut(IVault _vault, address _tokenIn, address _tokenOut, uint256 _amountIn)
+        external
+        view
+        returns (uint256, uint256);
+}
+
+interface IVault {
+    function getFeeBasisPoints(address _token, uint256 _usdgDelta, uint256 _feeBasisPoints, uint256 _taxBasisPoints, bool _increment) external view returns (uint256);
+    function stableSwapFeeBasisPoints() external view returns (uint256);
+    function stableTokens(address _token) external view returns (bool);
+    function tokenDecimals(address _token) external view returns (uint256);
+    function getMaxPrice(address _token) external view returns (uint256);
+    function getMinPrice(address _token) external view returns (uint256);
+}

packages/asset-swapper/contracts/src/interfaces/IPlatypus.sol

@@ -0,0 +1,11 @@
+pragma solidity ^0.6;
+
+interface IPlatypus {
+    function quotePotentialSwap(
+        address fromToken,
+        address toToken,
+        uint256 fromAmount
+    ) external view returns (uint256 potentialOutcome, uint256 haircut);
+
+    function assetOf(address token) external view returns (address);
+}

packages/asset-swapper/package.json

@@ -39,7 +39,7 @@
     "config": {
         "publicInterfaceContracts": "ERC20BridgeSampler,BalanceChecker,FakeTaker",
         "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually.",
-        "abis": "./test/generated-artifacts/@(ApproximateBuys|BalanceChecker|BalancerSampler|BalancerV2BatchSampler|BalancerV2Common|BalancerV2Sampler|BancorSampler|CompoundSampler|CurveSampler|DODOSampler|DODOV2Sampler|ERC20BridgeSampler|FakeTaker|IBalancer|IBalancerV2Vault|IBancor|ICurve|IKyberNetwork|IMStable|IMooniswap|IMultiBridge|IShell|ISmoothy|IUniswapExchangeQuotes|IUniswapV2Router01|KyberDmmSampler|KyberSampler|LidoSampler|LiquidityProviderSampler|MStableSampler|MakerPSMSampler|MooniswapSampler|NativeOrderSampler|SamplerUtils|ShellSampler|SmoothySampler|TestNativeOrderSampler|TwoHopSampler|UniswapSampler|UniswapV2Sampler|UniswapV3Sampler|UtilitySampler).json",
+        "abis": "./test/generated-artifacts/@(ApproximateBuys|BalanceChecker|BalancerSampler|BalancerV2BatchSampler|BalancerV2Common|BalancerV2Sampler|BancorSampler|CompoundSampler|CurveSampler|DODOSampler|DODOV2Sampler|ERC20BridgeSampler|FakeTaker|GMXSampler|IBalancer|IBalancerV2Vault|IBancor|ICurve|IGMX|IKyberNetwork|IMStable|IMooniswap|IMultiBridge|IPlatypus|IShell|ISmoothy|IUniswapExchangeQuotes|IUniswapV2Router01|KyberDmmSampler|KyberSampler|LidoSampler|LiquidityProviderSampler|MStableSampler|MakerPSMSampler|MooniswapSampler|NativeOrderSampler|PlatypusSampler|SamplerUtils|ShellSampler|SmoothySampler|TestNativeOrderSampler|TwoHopSampler|UniswapSampler|UniswapV2Sampler|UniswapV3Sampler|UtilitySampler).json",
         "postpublish": {
             "assets": []
         }

packages/asset-swapper/src/utils/market_operation_utils/bridge_source_utils.ts

@@ -40,6 +40,7 @@ import {
     PANCAKESWAP_ROUTER_BY_CHAIN_ID,
     PANCAKESWAPV2_ROUTER_BY_CHAIN_ID,
     PANGOLIN_ROUTER_BY_CHAIN_ID,
+    PLATYPUS_AVALANCHE_INFOS,
     POLYDEX_ROUTER_BY_CHAIN_ID,
     QUICKSWAP_ROUTER_BY_CHAIN_ID,
     SADDLE_MAINNET_INFOS,
@@ -62,7 +63,7 @@ import {
     WAULTSWAP_ROUTER_BY_CHAIN_ID,
     XSIGMA_MAINNET_INFOS,
 } from './constants';
-import { CurveInfo, ERC20BridgeSource } from './types';
+import { CurveInfo, ERC20BridgeSource, PlatypusInfo } from './types';
 
 /**
  * Filter Kyber reserves which should not be used (0xbb bridged reserves)
@@ -436,6 +437,15 @@ export function getMobiusMoneyInfoForPair(chainId: ChainId, takerToken: string,
     );
 }
 
+export function getPlatypusInfoForPair(chainId: ChainId, takerToken: string, makerToken: string): PlatypusInfo[] {
+    if (chainId !== ChainId.Avalanche) {
+        return [];
+    }
+    return Object.values(PLATYPUS_AVALANCHE_INFOS).filter(c =>
+        [makerToken, takerToken].every(t => c.tokens.includes(t)),
+    );
+}
+
 export function getShellLikeInfosForPair(
     chainId: ChainId,
     takerToken: string,

packages/asset-swapper/src/utils/market_operation_utils/constants.ts

@@ -28,6 +28,7 @@ import {
     LiquidityProviderRegistry,
     MakerPsmFillData,
     MultiHopFillData,
+    PlatypusInfo,
     PsmInfo,
     TokenAdjacencyGraph,
     UniswapV2FillData,
@@ -182,6 +183,8 @@ export const SELL_SOURCE_FILTER_BY_CHAIN_ID = valueByChainId<SourceFilters>(
             ERC20BridgeSource.KyberDmm,
             ERC20BridgeSource.AaveV2,
             ERC20BridgeSource.Synapse,
+            ERC20BridgeSource.GMX,
+            ERC20BridgeSource.Platypus,
         ]),
         [ChainId.Fantom]: new SourceFilters([
             ERC20BridgeSource.MultiHop,
@@ -326,6 +329,8 @@ export const BUY_SOURCE_FILTER_BY_CHAIN_ID = valueByChainId<SourceFilters>(
             ERC20BridgeSource.KyberDmm,
             ERC20BridgeSource.AaveV2,
             ERC20BridgeSource.Synapse,
+            ERC20BridgeSource.GMX,
+            ERC20BridgeSource.Platypus,
         ]),
         [ChainId.Fantom]: new SourceFilters([
             ERC20BridgeSource.MultiHop,
@@ -549,8 +554,10 @@ export const AVALANCHE_TOKENS = {
     DAI: '0xd586e7f844cea2f87f50152665bcbc2c279d8d70',
     // bridged USDC
     USDC: '0xa7d7079b0fead91f3e65f86e8915cb59c1a4c664',
-    // native USDC on Avalanche
+    // native USDC on Avalanche usdc.e
     nUSDC: '0xb97ef9ef8734c71904d8002f8b6bc66dd9c48a6e',
+    // usdt.e
+    USDt: '0x9702230a8ea53601f5cd2dc00fdbc13d4df4a8c7',
     USDT: '0xc7198437980c041c805a1edcba50c1ce5db95118',
     aDAI: '0x47afa96cdc9fab46904a55a6ad4bf6660b53c38a',
     aUSDC: '0x46a51127c3ce23fb7ab1de06226147f446e4a857',
@@ -560,6 +567,10 @@ export const AVALANCHE_TOKENS = {
     aWETH: '0x53f7c5869a859f0aec3d334ee8b4cf01e3492f21',
     MIM: '0x130966628846bfd36ff31a822705796e8cb8c18d',
     MAG: '0x1d60109178C48E4A937D8AB71699D8eBb6F7c5dE',
+    sAVAX: '0x2b2c81e08f1af8835a78bb2a90ae924ace0ea4be',
+    UST: '0xb599c3590f42f8f995ecfa0f85d2980b76862fc1',
+    FRAX: '0xd24c2ad096400b6fbcd2ad8b24e7acbc21a1da64',
+    YUSD: '0x111111111111ed1d73f860f57b2798b683f2d325',
 };
 
 export const CELO_TOKENS = {
@@ -822,6 +833,14 @@ export const ACRYPTOS_POOLS = {
     acs3btc: '0xbe7caa236544d1b9a0e7f91e94b9f5bfd3b5ca81',
 };
 
+export const PLATYPUS_AVALANCHE_POOLS = {
+    usd: '0x66357dcace80431aee0a7507e2e361b7e2402370',
+    yusd: '0xc828d995c686aaba78a4ac89dfc8ec0ff4c5be83',
+    frax: '0xb8e567fc23c39c94a1f6359509d7b43d1fbed824',
+    mim: '0x30c30d826be87cd0a4b90855c2f38f7fcfe4eaa7',
+    sAVAX: '0x4658ea7e9960d6158a261104aaa160cc953bb6ba',
+};
+
 export const DEFAULT_INTERMEDIATE_TOKENS_BY_CHAIN_ID = valueByChainId<string[]>(
     {
         [ChainId.Mainnet]: [
@@ -1792,6 +1811,40 @@ export const ACRYPTOS_BSC_INFOS: { [name: string]: CurveInfo } = {
     }),
 };
 
+export const PLATYPUS_AVALANCHE_INFOS: { [name: string]: PlatypusInfo } = {
+    [PLATYPUS_AVALANCHE_POOLS.usd]: {
+        poolAddress: PLATYPUS_AVALANCHE_POOLS.usd,
+        tokens: [
+            AVALANCHE_TOKENS.USDT,
+            AVALANCHE_TOKENS.USDC,
+            AVALANCHE_TOKENS.DAI,
+            AVALANCHE_TOKENS.nUSDC,
+            AVALANCHE_TOKENS.USDt,
+        ],
+        gasSchedule: 300e3,
+    },
+    [PLATYPUS_AVALANCHE_POOLS.yusd]: {
+        poolAddress: PLATYPUS_AVALANCHE_POOLS.yusd,
+        tokens: [AVALANCHE_TOKENS.YUSD, AVALANCHE_TOKENS.nUSDC],
+        gasSchedule: 300e3,
+    },
+    [PLATYPUS_AVALANCHE_POOLS.frax]: {
+        poolAddress: PLATYPUS_AVALANCHE_POOLS.frax,
+        tokens: [AVALANCHE_TOKENS.FRAX, AVALANCHE_TOKENS.nUSDC],
+        gasSchedule: 300e3,
+    },
+    [PLATYPUS_AVALANCHE_POOLS.mim]: {
+        poolAddress: PLATYPUS_AVALANCHE_POOLS.mim,
+        tokens: [AVALANCHE_TOKENS.MIM, AVALANCHE_TOKENS.nUSDC],
+        gasSchedule: 300e3,
+    },
+    [PLATYPUS_AVALANCHE_POOLS.sAVAX]: {
+        poolAddress: PLATYPUS_AVALANCHE_POOLS.sAVAX,
+        tokens: [AVALANCHE_TOKENS.WAVAX, AVALANCHE_TOKENS.sAVAX],
+        gasSchedule: 300e3,
+    },
+};
+
 /**
  * Kyber reserve prefixes
  * 0xff Fed price reserve
@@ -2324,6 +2377,34 @@ export const SPOOKYSWAP_ROUTER_BY_CHAIN_ID = valueByChainId<string>(
     NULL_ADDRESS,
 );
 
+export const GMX_ROUTER_BY_CHAIN_ID = valueByChainId<string>(
+    {
+        [ChainId.Avalanche]: '0x5f719c2f1095f7b9fc68a68e35b51194f4b6abe8',
+    },
+    NULL_ADDRESS,
+);
+
+export const GMX_READER_BY_CHAIN_ID = valueByChainId<string>(
+    {
+        [ChainId.Avalanche]: '0x67b789d48c926006f5132bfce4e976f0a7a63d5d',
+    },
+    NULL_ADDRESS,
+);
+
+export const GMX_VAULT_BY_CHAIN_ID = valueByChainId<string>(
+    {
+        [ChainId.Avalanche]: '0x9ab2de34a33fb459b538c43f251eb825645e8595',
+    },
+    NULL_ADDRESS,
+);
+
+export const PLATYPUS_ROUTER_BY_CHAIN_ID = valueByChainId<string>(
+    {
+        [ChainId.Avalanche]: '0x73256ec7575d999c360c1eec118ecbefd8da7d12',
+    },
+    NULL_ADDRESS,
+);
+
 export const VIP_ERC20_BRIDGE_SOURCES_BY_CHAIN_ID = valueByChainId<ERC20BridgeSource[]>(
     {
         [ChainId.Mainnet]: [
@@ -2526,6 +2607,8 @@ export const DEFAULT_GAS_SCHEDULE: Required<FeeSchedule> = {
     //
     [ERC20BridgeSource.Pangolin]: uniswapV2CloneGasSchedule,
     [ERC20BridgeSource.TraderJoe]: uniswapV2CloneGasSchedule,
+    [ERC20BridgeSource.GMX]: () => 450e3,
+    [ERC20BridgeSource.Platypus]: () => 450e3,
 
     //
     // Celo

packages/asset-swapper/src/utils/market_operation_utils/orders.ts

@@ -21,6 +21,7 @@ import {
     FinalUniswapV3FillData,
     GeistFillData,
     GenericRouterFillData,
+    GMXFillData,
     KyberDmmFillData,
     KyberFillData,
     LidoFillData,
@@ -35,6 +36,7 @@ import {
     OptimizedMarketOrder,
     OptimizedMarketOrderBase,
     OrderDomain,
+    PlatypusFillData,
     ShellFillData,
     UniswapV2FillData,
     UniswapV3FillData,
@@ -203,6 +205,10 @@ export function getErc20BridgeSourceToBridgeSource(source: ERC20BridgeSource): s
             return encodeBridgeSourceId(BridgeProtocol.Nerve, 'MobiusMoney');
         case ERC20BridgeSource.BiSwap:
             return encodeBridgeSourceId(BridgeProtocol.UniswapV2, 'BiSwap');
+        case ERC20BridgeSource.GMX:
+            return encodeBridgeSourceId(BridgeProtocol.GMX, 'GMX');
+        case ERC20BridgeSource.Platypus:
+            return encodeBridgeSourceId(BridgeProtocol.Platypus, 'Platypus');
         default:
             throw new Error(AggregationError.NoBridgeForSource);
     }
@@ -365,6 +371,23 @@ export function createBridgeDataForBridgeOrder(order: OptimizedMarketBridgeOrder
             const geistFillData = (order as OptimizedMarketBridgeOrder<GeistFillData>).fillData;
             bridgeData = encoder.encode([geistFillData.lendingPool, geistFillData.gToken]);
             break;
+        case ERC20BridgeSource.GMX:
+            const gmxFillData = (order as OptimizedMarketBridgeOrder<GMXFillData>).fillData;
+            bridgeData = encoder.encode([
+                gmxFillData.router,
+                gmxFillData.reader,
+                gmxFillData.vault,
+                gmxFillData.tokenAddressPath,
+            ]);
+            break;
+        case ERC20BridgeSource.Platypus:
+            const platypusFillData = (order as OptimizedMarketBridgeOrder<PlatypusFillData>).fillData;
+            bridgeData = encoder.encode([
+                platypusFillData.router,
+                platypusFillData.pool,
+                platypusFillData.tokenAddressPath,
+            ]);
+            break;
 
         default:
             throw new Error(AggregationError.NoBridgeForSource);
@@ -451,6 +474,8 @@ const balancerV2Encoder = AbiEncoder.create([
 ]);
 const routerAddressPathEncoder = AbiEncoder.create('(address,address[])');
 const tokenAddressEncoder = AbiEncoder.create([{ name: 'tokenAddress', type: 'address' }]);
+const gmxAddressPathEncoder = AbiEncoder.create('(address,address,address,address[])');
+const platypusAddressPathEncoder = AbiEncoder.create('(address,address[],address[])');
 
 export const BRIDGE_ENCODERS: {
     [key in Exclude<
@@ -501,6 +526,9 @@ export const BRIDGE_ENCODERS: {
     [ERC20BridgeSource.SpookySwap]: routerAddressPathEncoder,
     [ERC20BridgeSource.MorpheusSwap]: routerAddressPathEncoder,
     [ERC20BridgeSource.BiSwap]: routerAddressPathEncoder,
+     // Avalanche
+    [ERC20BridgeSource.GMX]: gmxAddressPathEncoder,
+    [ERC20BridgeSource.Platypus]: platypusAddressPathEncoder,
     // Celo
     [ERC20BridgeSource.UbeSwap]: routerAddressPathEncoder,
     // BSC

packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts

@@ -14,6 +14,7 @@ import {
     getCurveLikeInfosForPair,
     getDodoV2Offsets,
     getKyberOffsets,
+    getPlatypusInfoForPair,
     getShellLikeInfosForPair,
     isAllowedKyberReserveId,
     isBadTokenForSource,
@@ -30,6 +31,9 @@ import {
     COMPOUND_API_URL_BY_CHAIN_ID,
     DODOV1_CONFIG_BY_CHAIN_ID,
     DODOV2_FACTORIES_BY_CHAIN_ID,
+    GMX_READER_BY_CHAIN_ID,
+    GMX_ROUTER_BY_CHAIN_ID,
+    GMX_VAULT_BY_CHAIN_ID,
     KYBER_CONFIG_BY_CHAIN_ID,
     KYBER_DMM_ROUTER_BY_CHAIN_ID,
     LIDO_INFO_BY_CHAIN,
@@ -40,6 +44,7 @@ import {
     NATIVE_FEE_TOKEN_BY_CHAIN_ID,
     NULL_ADDRESS,
     NULL_BYTES,
+    PLATYPUS_ROUTER_BY_CHAIN_ID,
     SELL_SOURCE_FILTER_BY_CHAIN_ID,
     UNISWAPV1_ROUTER_BY_CHAIN_ID,
     UNISWAPV3_CONFIG_BY_CHAIN_ID,
@@ -72,6 +77,7 @@ import {
     GeistFillData,
     GeistInfo,
     GenericRouterFillData,
+    GMXFillData,
     HopInfo,
     KyberDmmFillData,
     KyberFillData,
@@ -83,6 +89,7 @@ import {
     MakerPsmFillData,
     MooniswapFillData,
     MultiHopFillData,
+    PlatypusFillData,
     PsmInfo,
     ShellFillData,
     SourceQuoteOperation,
@@ -1265,6 +1272,66 @@ export class SamplerOperations {
         });
     }
 
+    public getGMXSellQuotes(
+        router: string,
+        reader: string,
+        vault: string,
+        tokenAddressPath: string[],
+        takerFillAmounts: BigNumber[],
+    ): SourceQuoteOperation<GMXFillData> {
+        return new SamplerContractOperation({
+            source: ERC20BridgeSource.GMX,
+            fillData: { router, reader, vault, tokenAddressPath },
+            contract: this._samplerContract,
+            function: this._samplerContract.sampleSellsFromGMX,
+            params: [reader, vault, tokenAddressPath, takerFillAmounts],
+        });
+    }
+    public getGMXBuyQuotes(
+        router: string,
+        reader: string,
+        vault: string,
+        tokenAddressPath: string[],
+        makerFillAmounts: BigNumber[],
+    ): SourceQuoteOperation<GMXFillData> {
+        return new SamplerContractOperation({
+            source: ERC20BridgeSource.GMX,
+            fillData: { router, reader, vault, tokenAddressPath },
+            contract: this._samplerContract,
+            function: this._samplerContract.sampleBuysFromGMX,
+            params: [reader, vault, tokenAddressPath, makerFillAmounts],
+        });
+    }
+
+    public getPlatypusSellQuotes(
+        router: string,
+        pool: string[],
+        tokenAddressPath: string[],
+        takerFillAmounts: BigNumber[],
+    ): SourceQuoteOperation<PlatypusFillData> {
+        return new SamplerContractOperation({
+            source: ERC20BridgeSource.Platypus,
+            fillData: { router, pool, tokenAddressPath },
+            contract: this._samplerContract,
+            function: this._samplerContract.sampleSellsFromPlatypus,
+            params: [pool[0], tokenAddressPath, takerFillAmounts],
+        });
+    }
+    public getPlatypusBuyQuotes(
+        router: string,
+        pool: string[],
+        tokenAddressPath: string[],
+        makerFillAmounts: BigNumber[],
+    ): SourceQuoteOperation<PlatypusFillData> {
+        return new SamplerContractOperation({
+            source: ERC20BridgeSource.Platypus,
+            fillData: { router, pool, tokenAddressPath },
+            contract: this._samplerContract,
+            function: this._samplerContract.sampleBuysFromPlatypus,
+            params: [pool[0], tokenAddressPath, makerFillAmounts],
+        });
+    }
+
     public getMedianSellRate(
         sources: ERC20BridgeSource[],
         makerToken: string,
@@ -1649,6 +1716,32 @@ export class SamplerOperations {
                             takerFillAmounts,
                         );
                     }
+                    case ERC20BridgeSource.GMX: {
+                        // low liquidity mim pool dont quote
+                        if (
+                            takerToken === '0x130966628846bfd36ff31a822705796e8cb8c18d' ||
+                            makerToken === '0x130966628846bfd36ff31a822705796e8cb8c18d'
+                        ) {
+                            return [];
+                        }
+                        return this.getGMXSellQuotes(
+                            GMX_ROUTER_BY_CHAIN_ID[this.chainId],
+                            GMX_READER_BY_CHAIN_ID[this.chainId],
+                            GMX_VAULT_BY_CHAIN_ID[this.chainId],
+                            [takerToken, makerToken],
+                            takerFillAmounts,
+                        );
+                    }
+                    case ERC20BridgeSource.Platypus: {
+                        return getPlatypusInfoForPair(this.chainId, takerToken, makerToken).map(pool =>
+                            this.getPlatypusSellQuotes(
+                                PLATYPUS_ROUTER_BY_CHAIN_ID[this.chainId],
+                                [pool.poolAddress],
+                                [takerToken, makerToken],
+                                takerFillAmounts,
+                            ),
+                        );
+                    }
                     default:
                         throw new Error(`Unsupported sell sample source: ${source}`);
                 }
@@ -1951,6 +2044,32 @@ export class SamplerOperations {
                         }
                         return this.getCompoundBuyQuotes(cToken.tokenAddress, makerToken, takerToken, makerFillAmounts);
                     }
+                    case ERC20BridgeSource.GMX: {
+                        // bad mim pool dont quote
+                        if (
+                            takerToken === '0x130966628846bfd36ff31a822705796e8cb8c18d' ||
+                            makerToken === '0x130966628846bfd36ff31a822705796e8cb8c18d'
+                        ) {
+                            return [];
+                        }
+                        return this.getGMXBuyQuotes(
+                            GMX_ROUTER_BY_CHAIN_ID[this.chainId],
+                            GMX_READER_BY_CHAIN_ID[this.chainId],
+                            GMX_VAULT_BY_CHAIN_ID[this.chainId],
+                            [takerToken, makerToken],
+                            makerFillAmounts,
+                        );
+                    }
+                    case ERC20BridgeSource.Platypus: {
+                        return getPlatypusInfoForPair(this.chainId, takerToken, makerToken).map(pool =>
+                            this.getPlatypusBuyQuotes(
+                                PLATYPUS_ROUTER_BY_CHAIN_ID[this.chainId],
+                                [pool.poolAddress],
+                                [takerToken, makerToken],
+                                makerFillAmounts,
+                            ),
+                        );
+                    }
                     default:
                         throw new Error(`Unsupported buy sample source: ${source}`);
                 }

packages/asset-swapper/src/utils/market_operation_utils/types.ts

@@ -92,6 +92,8 @@ export enum ERC20BridgeSource {
     // Avalanche
     Pangolin = 'Pangolin',
     TraderJoe = 'TraderJoe',
+    Platypus = 'Platypus',
+    GMX = 'GMX',
     // Celo only
     UbeSwap = 'UbeSwap',
     MobiusMoney = 'MobiusMoney',
@@ -351,6 +353,24 @@ export interface GeistFillData extends FillData {
     takerToken: string;
 }
 
+export interface PlatypusInfo {
+    poolAddress: string;
+    tokens: string[];
+    gasSchedule: number;
+}
+
+export interface GMXFillData extends FillData {
+    router: string;
+    reader: string;
+    vault: string;
+    tokenAddressPath: string[];
+}
+
+export interface PlatypusFillData extends FillData {
+    router: string;
+    pool: string[];
+    tokenAddressPath: string[];
+}
 /**
  * Represents a node on a fill path.
  */

packages/asset-swapper/test/artifacts.ts

@@ -18,14 +18,17 @@ import * as DODOSampler from '../test/generated-artifacts/DODOSampler.json';
 import * as DODOV2Sampler from '../test/generated-artifacts/DODOV2Sampler.json';
 import * as ERC20BridgeSampler from '../test/generated-artifacts/ERC20BridgeSampler.json';
 import * as FakeTaker from '../test/generated-artifacts/FakeTaker.json';
+import * as GMXSampler from '../test/generated-artifacts/GMXSampler.json';
 import * as IBalancer from '../test/generated-artifacts/IBalancer.json';
 import * as IBalancerV2Vault from '../test/generated-artifacts/IBalancerV2Vault.json';
 import * as IBancor from '../test/generated-artifacts/IBancor.json';
 import * as ICurve from '../test/generated-artifacts/ICurve.json';
+import * as IGMX from '../test/generated-artifacts/IGMX.json';
 import * as IKyberNetwork from '../test/generated-artifacts/IKyberNetwork.json';
 import * as IMooniswap from '../test/generated-artifacts/IMooniswap.json';
 import * as IMStable from '../test/generated-artifacts/IMStable.json';
 import * as IMultiBridge from '../test/generated-artifacts/IMultiBridge.json';
+import * as IPlatypus from '../test/generated-artifacts/IPlatypus.json';
 import * as IShell from '../test/generated-artifacts/IShell.json';
 import * as ISmoothy from '../test/generated-artifacts/ISmoothy.json';
 import * as IUniswapExchangeQuotes from '../test/generated-artifacts/IUniswapExchangeQuotes.json';
@@ -38,6 +41,7 @@ import * as MakerPSMSampler from '../test/generated-artifacts/MakerPSMSampler.js
 import * as MooniswapSampler from '../test/generated-artifacts/MooniswapSampler.json';
 import * as MStableSampler from '../test/generated-artifacts/MStableSampler.json';
 import * as NativeOrderSampler from '../test/generated-artifacts/NativeOrderSampler.json';
+import * as PlatypusSampler from '../test/generated-artifacts/PlatypusSampler.json';
 import * as SamplerUtils from '../test/generated-artifacts/SamplerUtils.json';
 import * as ShellSampler from '../test/generated-artifacts/ShellSampler.json';
 import * as SmoothySampler from '../test/generated-artifacts/SmoothySampler.json';
@@ -61,6 +65,7 @@ export const artifacts = {
     DODOV2Sampler: DODOV2Sampler as ContractArtifact,
     ERC20BridgeSampler: ERC20BridgeSampler as ContractArtifact,
     FakeTaker: FakeTaker as ContractArtifact,
+    GMXSampler: GMXSampler as ContractArtifact,
     KyberDmmSampler: KyberDmmSampler as ContractArtifact,
     KyberSampler: KyberSampler as ContractArtifact,
     LidoSampler: LidoSampler as ContractArtifact,
@@ -69,6 +74,7 @@ export const artifacts = {
     MakerPSMSampler: MakerPSMSampler as ContractArtifact,
     MooniswapSampler: MooniswapSampler as ContractArtifact,
     NativeOrderSampler: NativeOrderSampler as ContractArtifact,
+    PlatypusSampler: PlatypusSampler as ContractArtifact,
     SamplerUtils: SamplerUtils as ContractArtifact,
     ShellSampler: ShellSampler as ContractArtifact,
     SmoothySampler: SmoothySampler as ContractArtifact,
@@ -81,10 +87,12 @@ export const artifacts = {
     IBalancerV2Vault: IBalancerV2Vault as ContractArtifact,
     IBancor: IBancor as ContractArtifact,
     ICurve: ICurve as ContractArtifact,
+    IGMX: IGMX as ContractArtifact,
     IKyberNetwork: IKyberNetwork as ContractArtifact,
     IMStable: IMStable as ContractArtifact,
     IMooniswap: IMooniswap as ContractArtifact,
     IMultiBridge: IMultiBridge as ContractArtifact,
+    IPlatypus: IPlatypus as ContractArtifact,
     IShell: IShell as ContractArtifact,
     ISmoothy: ISmoothy as ContractArtifact,
     IUniswapExchangeQuotes: IUniswapExchangeQuotes as ContractArtifact,

packages/asset-swapper/test/wrappers.ts

@@ -16,6 +16,7 @@ export * from '../test/generated-wrappers/d_o_d_o_sampler';
 export * from '../test/generated-wrappers/d_o_d_o_v2_sampler';
 export * from '../test/generated-wrappers/erc20_bridge_sampler';
 export * from '../test/generated-wrappers/fake_taker';
+export * from '../test/generated-wrappers/g_m_x_sampler';
 export * from '../test/generated-wrappers/i_balancer';
 export * from '../test/generated-wrappers/i_balancer_v2_vault';
 export * from '../test/generated-wrappers/i_bancor';
@@ -24,10 +25,12 @@ export * from '../test/generated-wrappers/i_kyber_network';
 export * from '../test/generated-wrappers/i_m_stable';
 export * from '../test/generated-wrappers/i_mooniswap';
 export * from '../test/generated-wrappers/i_multi_bridge';
+export * from '../test/generated-wrappers/i_platypus';
 export * from '../test/generated-wrappers/i_shell';
 export * from '../test/generated-wrappers/i_smoothy';
 export * from '../test/generated-wrappers/i_uniswap_exchange_quotes';
 export * from '../test/generated-wrappers/i_uniswap_v2_router01';
+export * from '../test/generated-wrappers/igmx';
 export * from '../test/generated-wrappers/kyber_dmm_sampler';
 export * from '../test/generated-wrappers/kyber_sampler';
 export * from '../test/generated-wrappers/lido_sampler';
@@ -36,6 +39,7 @@ export * from '../test/generated-wrappers/m_stable_sampler';
 export * from '../test/generated-wrappers/maker_p_s_m_sampler';
 export * from '../test/generated-wrappers/mooniswap_sampler';
 export * from '../test/generated-wrappers/native_order_sampler';
+export * from '../test/generated-wrappers/platypus_sampler';
 export * from '../test/generated-wrappers/sampler_utils';
 export * from '../test/generated-wrappers/shell_sampler';
 export * from '../test/generated-wrappers/smoothy_sampler';

packages/asset-swapper/tsconfig.json

@@ -19,14 +19,17 @@
         "test/generated-artifacts/DODOV2Sampler.json",
         "test/generated-artifacts/ERC20BridgeSampler.json",
         "test/generated-artifacts/FakeTaker.json",
+        "test/generated-artifacts/GMXSampler.json",
         "test/generated-artifacts/IBalancer.json",
         "test/generated-artifacts/IBalancerV2Vault.json",
         "test/generated-artifacts/IBancor.json",
         "test/generated-artifacts/ICurve.json",
+        "test/generated-artifacts/IGMX.json",
         "test/generated-artifacts/IKyberNetwork.json",
         "test/generated-artifacts/IMStable.json",
         "test/generated-artifacts/IMooniswap.json",
         "test/generated-artifacts/IMultiBridge.json",
+        "test/generated-artifacts/IPlatypus.json",
         "test/generated-artifacts/IShell.json",
         "test/generated-artifacts/ISmoothy.json",
         "test/generated-artifacts/IUniswapExchangeQuotes.json",
@@ -39,6 +42,7 @@
         "test/generated-artifacts/MakerPSMSampler.json",
         "test/generated-artifacts/MooniswapSampler.json",
         "test/generated-artifacts/NativeOrderSampler.json",
+        "test/generated-artifacts/PlatypusSampler.json",
         "test/generated-artifacts/SamplerUtils.json",
         "test/generated-artifacts/ShellSampler.json",
         "test/generated-artifacts/SmoothySampler.json",

packages/protocol-utils/CHANGELOG.json

@@ -1,4 +1,12 @@
 [
+    {
+        "version": "1.12.0",
+        "changes": [
+            {
+                "note": "Added Support for GMX and Platypus on Avalanche"
+            }
+        ]
+    },
     {
         "version": "11.12.0",
         "changes": [

packages/protocol-utils/src/transformer_utils.ts

@@ -135,6 +135,8 @@ export enum BridgeProtocol {
     AaveV2,
     Compound,
     BalancerV2Batch,
+    GMX,
+    Platypus,
 }
 // tslint:enable: enum-naming