Merge pull request #1465 from 0xProject/feature/contracts/dutchAuctionWrapper

Dutch Auction Wrapper

29 files changed, 1356 insertions, 140 deletions

diff --git a/contracts/extensions/CHANGELOG.json b/contracts/extensions/CHANGELOG.json
index 083ad33fb..40e25565e 100644
--- a/contracts/extensions/CHANGELOG.json
+++ b/contracts/extensions/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "1.2.0",
+        "changes": [
+            {
+                "note": "Added Dutch Auction Wrapper",
+                "pr": 1465
+            }
+        ]
+    },
+    {
         "version": "1.1.0",
         "changes": [
             {
diff --git a/contracts/extensions/package.json b/contracts/extensions/package.json
index 069b5d2d5..aee995645 100644
--- a/contracts/extensions/package.json
+++ b/contracts/extensions/package.json
@@ -45,6 +45,7 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
     "devDependencies": {
         "@0x/abi-gen": "^1.0.19",
+        "@0x/contract-wrappers": "^4.1.3",
         "@0x/contracts-test-utils": "^1.0.2",
         "@0x/dev-utils": "^1.0.21",
         "@0x/sol-compiler": "^1.1.16",
diff --git a/contracts/extensions/test/extensions/dutch_auction.ts b/contracts/extensions/test/extensions/dutch_auction.ts
index 6c3b2f0f3..22b3caa16 100644
--- a/contracts/extensions/test/extensions/dutch_auction.ts
+++ b/contracts/extensions/test/extensions/dutch_auction.ts
@@ -1,3 +1,4 @@
+import { DutchAuctionWrapper } from '@0x/contract-wrappers';
 import {
     artifacts as protocolArtifacts,
     ERC20Wrapper,
@@ -29,12 +30,11 @@ import { RevertReason, SignedOrder } from '@0x/types';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as chai from 'chai';
-import ethAbi = require('ethereumjs-abi');
-import * as ethUtil from 'ethereumjs-util';
 import * as _ from 'lodash';
 
 import { DutchAuctionContract } from '../../generated-wrappers/dutch_auction';
 import { artifacts } from '../../src/artifacts';
+import { DutchAuctionTestWrapper } from '../utils/dutch_auction_test_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -68,19 +68,8 @@ describe(ContractName.DutchAuction, () => {
     let erc721MakerAssetIds: BigNumber[];
     const tenMinutesInSeconds = 10 * 60;
 
-    function extendMakerAssetData(makerAssetData: string, beginTimeSeconds: BigNumber, beginAmount: BigNumber): string {
-        return ethUtil.bufferToHex(
-            Buffer.concat([
-                ethUtil.toBuffer(makerAssetData),
-                ethUtil.toBuffer(
-                    (ethAbi as any).rawEncode(
-                        ['uint256', 'uint256'],
-                        [beginTimeSeconds.toString(), beginAmount.toString()],
-                    ),
-                ),
-            ]),
-        );
-    }
+    let dutchAuctionTestWrapper: DutchAuctionTestWrapper;
+    let defaultERC20MakerAssetData: string;
 
     before(async () => {
         await blockchainLifecycle.startAsync();
@@ -136,6 +125,7 @@ describe(ContractName.DutchAuction, () => {
             dutchAuctionInstance.address,
             provider,
         );
+        dutchAuctionTestWrapper = new DutchAuctionTestWrapper(dutchAuctionInstance, provider);
 
         defaultMakerAssetAddress = erc20TokenA.address;
         const defaultTakerAssetAddress = wethContract.address;
@@ -174,7 +164,7 @@ describe(ContractName.DutchAuction, () => {
             feeRecipientAddress,
             // taker address or sender address should be set to the ducth auction contract
             takerAddress: dutchAuctionContract.address,
-            makerAssetData: extendMakerAssetData(
+            makerAssetData: DutchAuctionWrapper.encodeDutchAuctionAssetData(
                 assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
                 auctionBeginTimeSeconds,
                 auctionBeginAmount,
@@ -199,6 +189,7 @@ describe(ContractName.DutchAuction, () => {
         const takerPrivateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(takerAddress)];
         sellerOrderFactory = new OrderFactory(makerPrivateKey, sellerDefaultOrderParams);
         buyerOrderFactory = new OrderFactory(takerPrivateKey, buyerDefaultOrderParams);
+        defaultERC20MakerAssetData = assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress);
     });
     after(async () => {
         await blockchainLifecycle.revertAsync();
@@ -215,49 +206,41 @@ describe(ContractName.DutchAuction, () => {
     describe('matchOrders', () => {
         it('should be worth the begin price at the begining of the auction', async () => {
             auctionBeginTimeSeconds = new BigNumber(currentBlockTimestamp + 2);
-            sellOrder = await sellerOrderFactory.newSignedOrderAsync({
-                makerAssetData: extendMakerAssetData(
-                    assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
-                    auctionBeginTimeSeconds,
-                    auctionBeginAmount,
-                ),
-            });
-            const auctionDetails = await dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+                defaultERC20MakerAssetData,
+                auctionBeginTimeSeconds,
+                auctionBeginAmount,
+            );
+            sellOrder = await sellerOrderFactory.newSignedOrderAsync({ makerAssetData });
+            const auctionDetails = await dutchAuctionTestWrapper.getAuctionDetailsAsync(sellOrder);
+            expect(auctionDetails.currentTimeSeconds).to.be.bignumber.lte(auctionBeginTimeSeconds);
             expect(auctionDetails.currentAmount).to.be.bignumber.equal(auctionBeginAmount);
             expect(auctionDetails.beginAmount).to.be.bignumber.equal(auctionBeginAmount);
         });
         it('should be be worth the end price at the end of the auction', async () => {
             auctionBeginTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds * 2);
             auctionEndTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds);
+            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+                defaultERC20MakerAssetData,
+                auctionBeginTimeSeconds,
+                auctionBeginAmount,
+            );
             sellOrder = await sellerOrderFactory.newSignedOrderAsync({
-                makerAssetData: extendMakerAssetData(
-                    assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
-                    auctionBeginTimeSeconds,
-                    auctionBeginAmount,
-                ),
+                makerAssetData,
                 expirationTimeSeconds: auctionEndTimeSeconds,
             });
-            const auctionDetails = await dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+            const auctionDetails = await dutchAuctionTestWrapper.getAuctionDetailsAsync(sellOrder);
+            expect(auctionDetails.currentTimeSeconds).to.be.bignumber.gte(auctionEndTimeSeconds);
             expect(auctionDetails.currentAmount).to.be.bignumber.equal(auctionEndAmount);
             expect(auctionDetails.beginAmount).to.be.bignumber.equal(auctionBeginAmount);
         });
         it('should match orders at current amount and send excess to buyer', async () => {
-            const beforeAuctionDetails = await dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+            const beforeAuctionDetails = await dutchAuctionTestWrapper.getAuctionDetailsAsync(sellOrder);
             buyOrder = await buyerOrderFactory.newSignedOrderAsync({
                 makerAssetAmount: beforeAuctionDetails.currentAmount.times(2),
             });
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await dutchAuctionContract.matchOrders.sendTransactionAsync(
-                    buyOrder,
-                    sellOrder,
-                    buyOrder.signature,
-                    sellOrder.signature,
-                    {
-                        from: takerAddress,
-                    },
-                ),
-            );
-            const afterAuctionDetails = await dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+            await dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress);
+            const afterAuctionDetails = await dutchAuctionTestWrapper.getAuctionDetailsAsync(sellOrder);
             const newBalances = await erc20Wrapper.getBalancesAsync();
             expect(newBalances[dutchAuctionContract.address][wethContract.address]).to.be.bignumber.equal(
                 constants.ZERO_AMOUNT,
@@ -276,17 +259,8 @@ describe(ContractName.DutchAuction, () => {
             sellOrder = await sellerOrderFactory.newSignedOrderAsync({
                 makerFee: new BigNumber(1),
             });
-            const txHash = await dutchAuctionContract.matchOrders.sendTransactionAsync(
-                buyOrder,
-                sellOrder,
-                buyOrder.signature,
-                sellOrder.signature,
-                {
-                    from: takerAddress,
-                },
-            );
-            await web3Wrapper.awaitTransactionSuccessAsync(txHash);
-            const afterAuctionDetails = await dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+            await dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress);
+            const afterAuctionDetails = await dutchAuctionTestWrapper.getAuctionDetailsAsync(sellOrder);
             const newBalances = await erc20Wrapper.getBalancesAsync();
             expect(newBalances[makerAddress][wethContract.address]).to.be.bignumber.gte(
                 erc20Balances[makerAddress][wethContract.address].plus(afterAuctionDetails.currentAmount),
@@ -299,18 +273,9 @@ describe(ContractName.DutchAuction, () => {
             buyOrder = await buyerOrderFactory.newSignedOrderAsync({
                 makerFee: new BigNumber(1),
             });
-            const txHash = await dutchAuctionContract.matchOrders.sendTransactionAsync(
-                buyOrder,
-                sellOrder,
-                buyOrder.signature,
-                sellOrder.signature,
-                {
-                    from: takerAddress,
-                },
-            );
-            await web3Wrapper.awaitTransactionSuccessAsync(txHash);
+            await dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress);
             const newBalances = await erc20Wrapper.getBalancesAsync();
-            const afterAuctionDetails = await dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+            const afterAuctionDetails = await dutchAuctionTestWrapper.getAuctionDetailsAsync(sellOrder);
             expect(newBalances[makerAddress][wethContract.address]).to.be.bignumber.gte(
                 erc20Balances[makerAddress][wethContract.address].plus(afterAuctionDetails.currentAmount),
             );
@@ -321,24 +286,17 @@ describe(ContractName.DutchAuction, () => {
         it('should revert when auction expires', async () => {
             auctionBeginTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds * 2);
             auctionEndTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds);
+            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+                defaultERC20MakerAssetData,
+                auctionBeginTimeSeconds,
+                auctionBeginAmount,
+            );
             sellOrder = await sellerOrderFactory.newSignedOrderAsync({
                 expirationTimeSeconds: auctionEndTimeSeconds,
-                makerAssetData: extendMakerAssetData(
-                    assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
-                    auctionBeginTimeSeconds,
-                    auctionBeginAmount,
-                ),
+                makerAssetData,
             });
             return expectTransactionFailedAsync(
-                dutchAuctionContract.matchOrders.sendTransactionAsync(
-                    buyOrder,
-                    sellOrder,
-                    buyOrder.signature,
-                    sellOrder.signature,
-                    {
-                        from: takerAddress,
-                    },
-                ),
+                dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress),
                 RevertReason.AuctionExpired,
             );
         });
@@ -347,15 +305,7 @@ describe(ContractName.DutchAuction, () => {
                 makerAssetAmount: sellOrder.takerAssetAmount,
             });
             return expectTransactionFailedAsync(
-                dutchAuctionContract.matchOrders.sendTransactionAsync(
-                    buyOrder,
-                    sellOrder,
-                    buyOrder.signature,
-                    sellOrder.signature,
-                    {
-                        from: takerAddress,
-                    },
-                ),
+                dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress),
                 RevertReason.AuctionInvalidAmount,
             );
         });
@@ -364,38 +314,23 @@ describe(ContractName.DutchAuction, () => {
                 takerAssetAmount: auctionBeginAmount.plus(1),
             });
             return expectTransactionFailedAsync(
-                dutchAuctionContract.matchOrders.sendTransactionAsync(
-                    buyOrder,
-                    sellOrder,
-                    buyOrder.signature,
-                    sellOrder.signature,
-                    {
-                        from: takerAddress,
-                    },
-                ),
+                dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress),
                 RevertReason.AuctionInvalidAmount,
             );
         });
         it('begin time is less than end time', async () => {
             auctionBeginTimeSeconds = new BigNumber(auctionEndTimeSeconds).plus(tenMinutesInSeconds);
+            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+                defaultERC20MakerAssetData,
+                auctionBeginTimeSeconds,
+                auctionBeginAmount,
+            );
             sellOrder = await sellerOrderFactory.newSignedOrderAsync({
                 expirationTimeSeconds: auctionEndTimeSeconds,
-                makerAssetData: extendMakerAssetData(
-                    assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
-                    auctionBeginTimeSeconds,
-                    auctionBeginAmount,
-                ),
+                makerAssetData,
             });
             return expectTransactionFailedAsync(
-                dutchAuctionContract.matchOrders.sendTransactionAsync(
-                    buyOrder,
-                    sellOrder,
-                    buyOrder.signature,
-                    sellOrder.signature,
-                    {
-                        from: takerAddress,
-                    },
-                ),
+                dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress),
                 RevertReason.AuctionInvalidBeginTime,
             );
         });
@@ -404,45 +339,30 @@ describe(ContractName.DutchAuction, () => {
                 makerAssetData: assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
             });
             return expectTransactionFailedAsync(
-                dutchAuctionContract.matchOrders.sendTransactionAsync(
-                    buyOrder,
-                    sellOrder,
-                    buyOrder.signature,
-                    sellOrder.signature,
-                    {
-                        from: takerAddress,
-                    },
-                ),
+                dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress),
                 RevertReason.InvalidAssetData,
             );
         });
+
         describe('ERC721', () => {
             it('should match orders when ERC721', async () => {
                 const makerAssetId = erc721MakerAssetIds[0];
+                const erc721MakerAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId);
+                const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+                    erc721MakerAssetData,
+                    auctionBeginTimeSeconds,
+                    auctionBeginAmount,
+                );
                 sellOrder = await sellerOrderFactory.newSignedOrderAsync({
                     makerAssetAmount: new BigNumber(1),
-                    makerAssetData: extendMakerAssetData(
-                        assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId),
-                        auctionBeginTimeSeconds,
-                        auctionBeginAmount,
-                    ),
+                    makerAssetData,
                 });
                 buyOrder = await buyerOrderFactory.newSignedOrderAsync({
                     takerAssetAmount: new BigNumber(1),
                     takerAssetData: sellOrder.makerAssetData,
                 });
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await dutchAuctionContract.matchOrders.sendTransactionAsync(
-                        buyOrder,
-                        sellOrder,
-                        buyOrder.signature,
-                        sellOrder.signature,
-                        {
-                            from: takerAddress,
-                        },
-                    ),
-                );
-                const afterAuctionDetails = await dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+                await dutchAuctionTestWrapper.matchOrdersAsync(buyOrder, sellOrder, takerAddress);
+                const afterAuctionDetails = await dutchAuctionTestWrapper.getAuctionDetailsAsync(sellOrder);
                 const newBalances = await erc20Wrapper.getBalancesAsync();
                 // HACK gte used here due to a bug in ganache where the timestamp can change
                 // between multiple calls to the same block. Which can move the amount in our case
diff --git a/contracts/extensions/test/utils/dutch_auction_test_wrapper.ts b/contracts/extensions/test/utils/dutch_auction_test_wrapper.ts
new file mode 100644
index 000000000..c1e2f2070
--- /dev/null
+++ b/contracts/extensions/test/utils/dutch_auction_test_wrapper.ts
@@ -0,0 +1,62 @@
+import { artifacts as protocolArtifacts } from '@0x/contracts-protocol';
+import { LogDecoder } from '@0x/contracts-test-utils';
+import { artifacts as tokensArtifacts } from '@0x/contracts-tokens';
+import { DutchAuctionDetails, SignedOrder } from '@0x/types';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { DutchAuctionContract } from '../../generated-wrappers/dutch_auction';
+import { artifacts } from '../../src/artifacts';
+
+export class DutchAuctionTestWrapper {
+    private readonly _dutchAuctionContract: DutchAuctionContract;
+    private readonly _web3Wrapper: Web3Wrapper;
+    private readonly _logDecoder: LogDecoder;
+
+    constructor(contractInstance: DutchAuctionContract, provider: Provider) {
+        this._dutchAuctionContract = contractInstance;
+        this._web3Wrapper = new Web3Wrapper(provider);
+        this._logDecoder = new LogDecoder(this._web3Wrapper, {
+            ...artifacts,
+            ...tokensArtifacts,
+            ...protocolArtifacts,
+        });
+    }
+    /**
+     * Matches the buy and sell orders at an amount given the following: the current block time, the auction
+     * start time and the auction begin amount. The sell order is a an order at the lowest amount
+     * at the end of the auction. Excess from the match is transferred to the seller.
+     * Over time the price moves from beginAmount to endAmount given the current block.timestamp.
+     * @param buyOrder The Buyer's order. This order is for the current expected price of the auction.
+     * @param sellOrder The Seller's order. This order is for the lowest amount (at the end of the auction).
+     * @param from Address the transaction is being sent from.
+     * @return Transaction receipt with decoded logs.
+     */
+    public async matchOrdersAsync(
+        buyOrder: SignedOrder,
+        sellOrder: SignedOrder,
+        from: string,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
+        const txHash = await this._dutchAuctionContract.matchOrders.sendTransactionAsync(
+            buyOrder,
+            sellOrder,
+            buyOrder.signature,
+            sellOrder.signature,
+            {
+                from,
+            },
+        );
+        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
+        return tx;
+    }
+    /**
+     * Calculates the Auction Details for the given order
+     * @param sellOrder The Seller's order. This order is for the lowest amount (at the end of the auction).
+     * @return The dutch auction details.
+     */
+    public async getAuctionDetailsAsync(sellOrder: SignedOrder): Promise<DutchAuctionDetails> {
+        const auctionDetails = await this._dutchAuctionContract.getAuctionDetails.callAsync(sellOrder);
+        return auctionDetails;
+    }
+}
diff --git a/packages/0x.js/src/index.ts b/packages/0x.js/src/index.ts
index d21df0c01..006e4cf29 100644
--- a/packages/0x.js/src/index.ts
+++ b/packages/0x.js/src/index.ts
@@ -4,6 +4,7 @@ export { assetDataUtils, signatureUtils, generatePseudoRandomSalt, orderHashUtil
 
 export {
     ContractWrappers,
+    DutchAuctionWrapper,
     ERC20TokenWrapper,
     ERC721TokenWrapper,
     EtherTokenWrapper,
@@ -27,6 +28,7 @@ export {
     OrderAndTraderInfo,
     TraderInfo,
     ValidateOrderFillableOpts,
+    DutchAuctionData,
 } from '@0x/contract-wrappers';
 
 export {
@@ -79,6 +81,7 @@ export {
     OrderStateInvalid,
     OrderState,
     AssetProxyId,
+    AssetData,
     SingleAssetData,
     ERC20AssetData,
     ERC721AssetData,
@@ -88,6 +91,7 @@ export {
     ObjectMap,
     OrderRelevantState,
     Stats,
+    DutchAuctionDetails,
 } from '@0x/types';
 
 export {
diff --git a/packages/abi-gen-wrappers/CHANGELOG.json b/packages/abi-gen-wrappers/CHANGELOG.json
index d46e828f4..214920a08 100644
--- a/packages/abi-gen-wrappers/CHANGELOG.json
+++ b/packages/abi-gen-wrappers/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "2.1.0",
+        "changes": [
+            {
+                "note": "Added Dutch Auction Wrapper",
+                "pr": 1465
+            }
+        ]
+    },
+    {
         "version": "2.0.2",
         "changes": [
             {
diff --git a/packages/abi-gen-wrappers/package.json b/packages/abi-gen-wrappers/package.json
index 25ba3a6e0..38b5e9a9b 100644
--- a/packages/abi-gen-wrappers/package.json
+++ b/packages/abi-gen-wrappers/package.json
@@ -18,7 +18,7 @@
         "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output src/generated-wrappers --backend ethers"
     },
     "config": {
-        "abis": "../contract-artifacts/artifacts/@(AssetProxyOwner|DummyERC20Token|DummyERC721Token|ERC20Proxy|ERC20Token|ERC721Proxy|ERC721Token|Exchange|Forwarder|IValidator|IWallet|OrderValidator|WETH9|ZRXToken).json"
+        "abis": "../contract-artifacts/artifacts/@(AssetProxyOwner|DutchAuction|DummyERC20Token|DummyERC721Token|ERC20Proxy|ERC20Token|ERC721Proxy|ERC721Token|Exchange|Forwarder|IValidator|IWallet|OrderValidator|WETH9|ZRXToken).json"
     },
     "repository": {
         "type": "git",
diff --git a/packages/abi-gen-wrappers/src/generated-wrappers/dutch_auction.ts b/packages/abi-gen-wrappers/src/generated-wrappers/dutch_auction.ts
new file mode 100644
index 000000000..90e233756
--- /dev/null
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/dutch_auction.ts
@@ -0,0 +1,322 @@
+// tslint:disable:no-consecutive-blank-lines ordered-imports align trailing-comma whitespace class-name
+// tslint:disable:no-unused-variable
+// tslint:disable:no-unbound-method
+import { BaseContract } from '@0x/base-contract';
+import { BlockParam, BlockParamLiteral, CallData, ContractAbi, ContractArtifact, DecodedLogArgs, MethodAbi, Provider, TxData, TxDataPayable } from 'ethereum-types';
+import { BigNumber, classUtils, logUtils } from '@0x/utils';
+import { SimpleContractArtifact } from '@0x/types';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import * as ethers from 'ethers';
+import * as _ from 'lodash';
+// tslint:enable:no-unused-variable
+
+
+/* istanbul ignore next */
+// tslint:disable:no-parameter-reassignment
+// tslint:disable-next-line:class-name
+export class DutchAuctionContract extends BaseContract {
+    public getAuctionDetails = {
+        async sendTransactionAsync(
+            order: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            txData: Partial<TxData> = {},
+        ): Promise<string> {
+            const self = this as any as DutchAuctionContract;
+            const inputAbi = self._lookupAbi('getAuctionDetails({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes})').inputs;
+            [order
+    ] = BaseContract._formatABIDataItemList(inputAbi, [order
+    ], BaseContract._bigNumberToString.bind(self));
+            BaseContract.strictArgumentEncodingCheck(inputAbi, [order
+    ]);
+            const encodedData = self._lookupEthersInterface('getAuctionDetails({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes})').functions.getAuctionDetails.encode([order
+    ]);
+            const txDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
+                {
+                    to: self.address,
+                    ...txData,
+                    data: encodedData,
+                },
+                self._web3Wrapper.getContractDefaults(),
+                self.getAuctionDetails.estimateGasAsync.bind(
+                    self,
+                    order
+                ),
+            );
+            const txHash = await self._web3Wrapper.sendTransactionAsync(txDataWithDefaults);
+            return txHash;
+        },
+        async estimateGasAsync(
+            order: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            txData: Partial<TxData> = {},
+        ): Promise<number> {
+            const self = this as any as DutchAuctionContract;
+            const inputAbi = self._lookupAbi('getAuctionDetails({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes})').inputs;
+            [order
+    ] = BaseContract._formatABIDataItemList(inputAbi, [order
+    ], BaseContract._bigNumberToString);
+            const encodedData = self._lookupEthersInterface('getAuctionDetails({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes})').functions.getAuctionDetails.encode([order
+    ]);
+            const txDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
+                {
+                    to: self.address,
+                    ...txData,
+                    data: encodedData,
+                },
+                self._web3Wrapper.getContractDefaults(),
+            );
+            const gas = await self._web3Wrapper.estimateGasAsync(txDataWithDefaults);
+            return gas;
+        },
+        getABIEncodedTransactionData(
+            order: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+        ): string {
+            const self = this as any as DutchAuctionContract;
+            const inputAbi = self._lookupAbi('getAuctionDetails({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes})').inputs;
+            [order
+    ] = BaseContract._formatABIDataItemList(inputAbi, [order
+    ], BaseContract._bigNumberToString);
+            const abiEncodedTransactionData = self._lookupEthersInterface('getAuctionDetails({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes})').functions.getAuctionDetails.encode([order
+    ]);
+            return abiEncodedTransactionData;
+        },
+        async callAsync(
+            order: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            callData: Partial<CallData> = {},
+            defaultBlock?: BlockParam,
+        ): Promise<{beginTimeSeconds: BigNumber;endTimeSeconds: BigNumber;beginAmount: BigNumber;endAmount: BigNumber;currentAmount: BigNumber;currentTimeSeconds: BigNumber}
+        > {
+            const self = this as any as DutchAuctionContract;
+            const functionSignature = 'getAuctionDetails({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes})';
+            const inputAbi = self._lookupAbi(functionSignature).inputs;
+            [order
+        ] = BaseContract._formatABIDataItemList(inputAbi, [order
+        ], BaseContract._bigNumberToString.bind(self));
+            BaseContract.strictArgumentEncodingCheck(inputAbi, [order
+        ]);
+            const ethersFunction = self._lookupEthersInterface(functionSignature).functions.getAuctionDetails;
+            const encodedData = ethersFunction.encode([order
+        ]);
+            const callDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
+                {
+                    to: self.address,
+                    ...callData,
+                    data: encodedData,
+                },
+                self._web3Wrapper.getContractDefaults(),
+            );
+            const rawCallResult = await self._web3Wrapper.callAsync(callDataWithDefaults, defaultBlock);
+            BaseContract._throwIfRevertWithReasonCallResult(rawCallResult);
+            let resultArray = ethersFunction.decode(rawCallResult);
+            const outputAbi = (_.find(self.abi, {name: 'getAuctionDetails'}) as MethodAbi).outputs;
+            resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._lowercaseAddress.bind(this));
+            resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._bnToBigNumber.bind(this));
+            return resultArray[0];
+        },
+    };
+    public matchOrders = {
+        async sendTransactionAsync(
+            buyOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            sellOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            buySignature: string,
+            sellSignature: string,
+            txData: Partial<TxData> = {},
+        ): Promise<string> {
+            const self = this as any as DutchAuctionContract;
+            const inputAbi = self._lookupAbi('matchOrders({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},{address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},bytes,bytes)').inputs;
+            [buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ] = BaseContract._formatABIDataItemList(inputAbi, [buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ], BaseContract._bigNumberToString.bind(self));
+            BaseContract.strictArgumentEncodingCheck(inputAbi, [buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ]);
+            const encodedData = self._lookupEthersInterface('matchOrders({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},{address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},bytes,bytes)').functions.matchOrders.encode([buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ]);
+            const txDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
+                {
+                    to: self.address,
+                    ...txData,
+                    data: encodedData,
+                },
+                self._web3Wrapper.getContractDefaults(),
+                self.matchOrders.estimateGasAsync.bind(
+                    self,
+                    buyOrder,
+                    sellOrder,
+                    buySignature,
+                    sellSignature
+                ),
+            );
+            const txHash = await self._web3Wrapper.sendTransactionAsync(txDataWithDefaults);
+            return txHash;
+        },
+        async estimateGasAsync(
+            buyOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            sellOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            buySignature: string,
+            sellSignature: string,
+            txData: Partial<TxData> = {},
+        ): Promise<number> {
+            const self = this as any as DutchAuctionContract;
+            const inputAbi = self._lookupAbi('matchOrders({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},{address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},bytes,bytes)').inputs;
+            [buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ] = BaseContract._formatABIDataItemList(inputAbi, [buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ], BaseContract._bigNumberToString);
+            const encodedData = self._lookupEthersInterface('matchOrders({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},{address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},bytes,bytes)').functions.matchOrders.encode([buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ]);
+            const txDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
+                {
+                    to: self.address,
+                    ...txData,
+                    data: encodedData,
+                },
+                self._web3Wrapper.getContractDefaults(),
+            );
+            const gas = await self._web3Wrapper.estimateGasAsync(txDataWithDefaults);
+            return gas;
+        },
+        getABIEncodedTransactionData(
+            buyOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            sellOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            buySignature: string,
+            sellSignature: string,
+        ): string {
+            const self = this as any as DutchAuctionContract;
+            const inputAbi = self._lookupAbi('matchOrders({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},{address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},bytes,bytes)').inputs;
+            [buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ] = BaseContract._formatABIDataItemList(inputAbi, [buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ], BaseContract._bigNumberToString);
+            const abiEncodedTransactionData = self._lookupEthersInterface('matchOrders({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},{address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},bytes,bytes)').functions.matchOrders.encode([buyOrder,
+    sellOrder,
+    buySignature,
+    sellSignature
+    ]);
+            return abiEncodedTransactionData;
+        },
+        async callAsync(
+            buyOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            sellOrder: {makerAddress: string;takerAddress: string;feeRecipientAddress: string;senderAddress: string;makerAssetAmount: BigNumber;takerAssetAmount: BigNumber;makerFee: BigNumber;takerFee: BigNumber;expirationTimeSeconds: BigNumber;salt: BigNumber;makerAssetData: string;takerAssetData: string},
+            buySignature: string,
+            sellSignature: string,
+            callData: Partial<CallData> = {},
+            defaultBlock?: BlockParam,
+        ): Promise<{left: {makerAssetFilledAmount: BigNumber;takerAssetFilledAmount: BigNumber;makerFeePaid: BigNumber;takerFeePaid: BigNumber};right: {makerAssetFilledAmount: BigNumber;takerAssetFilledAmount: BigNumber;makerFeePaid: BigNumber;takerFeePaid: BigNumber};leftMakerAssetSpreadAmount: BigNumber}
+        > {
+            const self = this as any as DutchAuctionContract;
+            const functionSignature = 'matchOrders({address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},{address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes},bytes,bytes)';
+            const inputAbi = self._lookupAbi(functionSignature).inputs;
+            [buyOrder,
+        sellOrder,
+        buySignature,
+        sellSignature
+        ] = BaseContract._formatABIDataItemList(inputAbi, [buyOrder,
+        sellOrder,
+        buySignature,
+        sellSignature
+        ], BaseContract._bigNumberToString.bind(self));
+            BaseContract.strictArgumentEncodingCheck(inputAbi, [buyOrder,
+        sellOrder,
+        buySignature,
+        sellSignature
+        ]);
+            const ethersFunction = self._lookupEthersInterface(functionSignature).functions.matchOrders;
+            const encodedData = ethersFunction.encode([buyOrder,
+        sellOrder,
+        buySignature,
+        sellSignature
+        ]);
+            const callDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
+                {
+                    to: self.address,
+                    ...callData,
+                    data: encodedData,
+                },
+                self._web3Wrapper.getContractDefaults(),
+            );
+            const rawCallResult = await self._web3Wrapper.callAsync(callDataWithDefaults, defaultBlock);
+            BaseContract._throwIfRevertWithReasonCallResult(rawCallResult);
+            let resultArray = ethersFunction.decode(rawCallResult);
+            const outputAbi = (_.find(self.abi, {name: 'matchOrders'}) as MethodAbi).outputs;
+            resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._lowercaseAddress.bind(this));
+            resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._bnToBigNumber.bind(this));
+            return resultArray[0];
+        },
+    };
+    public static async deployFrom0xArtifactAsync(
+        artifact: ContractArtifact | SimpleContractArtifact,
+        provider: Provider,
+        txDefaults: Partial<TxData>,
+            _exchange: string,
+    ): Promise<DutchAuctionContract> {
+        if (_.isUndefined(artifact.compilerOutput)) {
+            throw new Error('Compiler output not found in the artifact file');
+        }
+        const bytecode = artifact.compilerOutput.evm.bytecode.object;
+        const abi = artifact.compilerOutput.abi;
+        return DutchAuctionContract.deployAsync(bytecode, abi, provider, txDefaults, _exchange
+);
+    }
+    public static async deployAsync(
+        bytecode: string,
+        abi: ContractAbi,
+        provider: Provider,
+        txDefaults: Partial<TxData>,
+            _exchange: string,
+    ): Promise<DutchAuctionContract> {
+        const constructorAbi = BaseContract._lookupConstructorAbi(abi);
+        [_exchange
+] = BaseContract._formatABIDataItemList(
+            constructorAbi.inputs,
+            [_exchange
+],
+            BaseContract._bigNumberToString,
+        );
+        const iface = new ethers.utils.Interface(abi);
+        const deployInfo = iface.deployFunction;
+        const txData = deployInfo.encode(bytecode, [_exchange
+]);
+        const web3Wrapper = new Web3Wrapper(provider);
+        const txDataWithDefaults = await BaseContract._applyDefaultsToTxDataAsync(
+            {data: txData},
+            txDefaults,
+            web3Wrapper.estimateGasAsync.bind(web3Wrapper),
+        );
+        const txHash = await web3Wrapper.sendTransactionAsync(txDataWithDefaults);
+        logUtils.log(`transactionHash: ${txHash}`);
+        const txReceipt = await web3Wrapper.awaitTransactionSuccessAsync(txHash);
+        logUtils.log(`DutchAuction successfully deployed at ${txReceipt.contractAddress}`);
+        const contractInstance = new DutchAuctionContract(abi, txReceipt.contractAddress as string, provider, txDefaults);
+        contractInstance.constructorArgs = [_exchange
+];
+        return contractInstance;
+    }
+    constructor(abi: ContractAbi, address: string, provider: Provider, txDefaults?: Partial<TxData>) {
+        super('DutchAuction', abi, address, provider, txDefaults);
+        classUtils.bindAll(this, ['_ethersInterfacesByFunctionSignature', 'address', 'abi', '_web3Wrapper']);
+    }
+} // tslint:disable:max-file-line-count
+// tslint:enable:no-unbound-method
diff --git a/packages/abi-gen-wrappers/src/index.ts b/packages/abi-gen-wrappers/src/index.ts
index de418214b..b5a7d0cfe 100644
--- a/packages/abi-gen-wrappers/src/index.ts
+++ b/packages/abi-gen-wrappers/src/index.ts
@@ -1,6 +1,7 @@
 export * from './generated-wrappers/asset_proxy_owner';
 export * from './generated-wrappers/dummy_erc20_token';
 export * from './generated-wrappers/dummy_erc721_token';
+export * from './generated-wrappers/dutch_auction';
 export * from './generated-wrappers/erc20_proxy';
 export * from './generated-wrappers/erc20_token';
 export * from './generated-wrappers/erc721_proxy';
diff --git a/packages/contract-addresses/CHANGELOG.json b/packages/contract-addresses/CHANGELOG.json
index 21ffaf510..ca79290da 100644
--- a/packages/contract-addresses/CHANGELOG.json
+++ b/packages/contract-addresses/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "2.1.0",
+        "changes": [
+            {
+                "note": "Added testnet entries for Dutch Auction contract (kovan,rinkeby,ropsten)",
+                "pr": 1465
+            }
+        ]
+    },
+    {
         "version": "2.0.0",
         "changes": [
             {
diff --git a/packages/contract-addresses/src/index.ts b/packages/contract-addresses/src/index.ts
index 7989631e3..d181a1bec 100644
--- a/packages/contract-addresses/src/index.ts
+++ b/packages/contract-addresses/src/index.ts
@@ -9,6 +9,7 @@ export interface ContractAddresses {
     assetProxyOwner: string;
     forwarder: string;
     orderValidator: string;
+    dutchAuction: string;
 }
 
 export enum NetworkId {
@@ -19,6 +20,8 @@ export enum NetworkId {
     Ganache = 50,
 }
 
+const NULL_ADDRESS = '0x0000000000000000000000000000000000000000';
+
 const networkToAddresses: { [networkId: number]: ContractAddresses } = {
     1: {
         erc20Proxy: '0x2240dab907db71e64d3e0dba4800c83b5c502d4e',
@@ -29,6 +32,8 @@ const networkToAddresses: { [networkId: number]: ContractAddresses } = {
         assetProxyOwner: '0x17992e4ffb22730138e4b62aaa6367fa9d3699a6',
         forwarder: '0x5468a1dc173652ee28d249c271fa9933144746b1',
         orderValidator: '0x9463e518dea6810309563c81d5266c1b1d149138',
+        // @todo hysz/dekz: Add mainnet address once deployed.
+        dutchAuction: NULL_ADDRESS,
     },
     3: {
         erc20Proxy: '0xb1408f4c245a23c31b98d2c626777d4c0d766caa',
@@ -39,6 +44,7 @@ const networkToAddresses: { [networkId: number]: ContractAddresses } = {
         assetProxyOwner: '0xf5fa5b5fed2727a0e44ac67f6772e97977aa358b',
         forwarder: '0x2240dab907db71e64d3e0dba4800c83b5c502d4e',
         orderValidator: '0x90431a90516ab49af23a0530e04e8c7836e7122f',
+        dutchAuction: '0x2df6b59309f35ada230ec7d61d7d97355017a1df',
     },
     4: {
         exchange: '0xbce0b5f6eb618c565c3e5f5cd69652bbc279f44e',
@@ -49,6 +55,7 @@ const networkToAddresses: { [networkId: number]: ContractAddresses } = {
         assetProxyOwner: '0xe1703da878afcebff5b7624a826902af475b9c03',
         forwarder: '0x2d40589abbdee84961f3a7656b9af7adb0ee5ab4',
         orderValidator: '0x0c5173a51e26b29d6126c686756fb9fbef71f762',
+        dutchAuction: '0xdd7bd6437e67c422879364740ab5855fe3dc41f7',
     },
     42: {
         erc20Proxy: '0xf1ec01d6236d3cd881a0bf0130ea25fe4234003e',
@@ -59,6 +66,7 @@ const networkToAddresses: { [networkId: number]: ContractAddresses } = {
         assetProxyOwner: '0x2c824d2882baa668e0d5202b1e7f2922278703f8',
         forwarder: '0x17992e4ffb22730138e4b62aaa6367fa9d3699a6',
         orderValidator: '0xb389da3d204b412df2f75c6afb3d0a7ce0bc283d',
+        dutchAuction: '0xe11667fb51f34c5367f40d7e379327ce32ee7150',
     },
     // NetworkId 50 represents our Ganache snapshot generated from migrations.
     50: {
@@ -70,6 +78,7 @@ const networkToAddresses: { [networkId: number]: ContractAddresses } = {
         assetProxyOwner: '0x34d402f14d58e001d8efbe6585051bf9706aa064',
         forwarder: '0xb69e673309512a9d726f87304c6984054f87a93b',
         orderValidator: '0xe86bb98fcf9bff3512c74589b78fb168200cc546',
+        dutchAuction: '0xdc688d29394a3f1e6f1e5100862776691afaf3d2',
     },
 };
 
diff --git a/packages/contract-artifacts/CHANGELOG.json b/packages/contract-artifacts/CHANGELOG.json
index 03c88e71a..b033943d2 100644
--- a/packages/contract-artifacts/CHANGELOG.json
+++ b/packages/contract-artifacts/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "1.2.0",
+        "changes": [
+            {
+                "pr": 1465,
+                "note": "Added artifact for Dutch Auction contract"
+            }
+        ]
+    },
+    {
         "version": "1.1.2",
         "changes": [
             {
diff --git a/packages/contract-artifacts/artifacts/DutchAuction.json b/packages/contract-artifacts/artifacts/DutchAuction.json
new file mode 100644
index 000000000..3c1cb8c4c
--- /dev/null
+++ b/packages/contract-artifacts/artifacts/DutchAuction.json
@@ -0,0 +1,310 @@
+{
+	"schemaVersion": "2.0.0",
+	"contractName": "DutchAuction",
+	"compilerOutput": {
+		"abi": [
+			{
+				"constant": false,
+				"inputs": [
+					{
+						"components": [
+							{
+								"name": "makerAddress",
+								"type": "address"
+							},
+							{
+								"name": "takerAddress",
+								"type": "address"
+							},
+							{
+								"name": "feeRecipientAddress",
+								"type": "address"
+							},
+							{
+								"name": "senderAddress",
+								"type": "address"
+							},
+							{
+								"name": "makerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "expirationTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "salt",
+								"type": "uint256"
+							},
+							{
+								"name": "makerAssetData",
+								"type": "bytes"
+							},
+							{
+								"name": "takerAssetData",
+								"type": "bytes"
+							}
+						],
+						"name": "order",
+						"type": "tuple"
+					}
+				],
+				"name": "getAuctionDetails",
+				"outputs": [
+					{
+						"components": [
+							{
+								"name": "beginTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "endTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "beginAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "endAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "currentAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "currentTimeSeconds",
+								"type": "uint256"
+							}
+						],
+						"name": "auctionDetails",
+						"type": "tuple"
+					}
+				],
+				"payable": false,
+				"stateMutability": "nonpayable",
+				"type": "function"
+			},
+			{
+				"constant": false,
+				"inputs": [
+					{
+						"components": [
+							{
+								"name": "makerAddress",
+								"type": "address"
+							},
+							{
+								"name": "takerAddress",
+								"type": "address"
+							},
+							{
+								"name": "feeRecipientAddress",
+								"type": "address"
+							},
+							{
+								"name": "senderAddress",
+								"type": "address"
+							},
+							{
+								"name": "makerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "expirationTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "salt",
+								"type": "uint256"
+							},
+							{
+								"name": "makerAssetData",
+								"type": "bytes"
+							},
+							{
+								"name": "takerAssetData",
+								"type": "bytes"
+							}
+						],
+						"name": "buyOrder",
+						"type": "tuple"
+					},
+					{
+						"components": [
+							{
+								"name": "makerAddress",
+								"type": "address"
+							},
+							{
+								"name": "takerAddress",
+								"type": "address"
+							},
+							{
+								"name": "feeRecipientAddress",
+								"type": "address"
+							},
+							{
+								"name": "senderAddress",
+								"type": "address"
+							},
+							{
+								"name": "makerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "expirationTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "salt",
+								"type": "uint256"
+							},
+							{
+								"name": "makerAssetData",
+								"type": "bytes"
+							},
+							{
+								"name": "takerAssetData",
+								"type": "bytes"
+							}
+						],
+						"name": "sellOrder",
+						"type": "tuple"
+					},
+					{
+						"name": "buySignature",
+						"type": "bytes"
+					},
+					{
+						"name": "sellSignature",
+						"type": "bytes"
+					}
+				],
+				"name": "matchOrders",
+				"outputs": [
+					{
+						"components": [
+							{
+								"components": [
+									{
+										"name": "makerAssetFilledAmount",
+										"type": "uint256"
+									},
+									{
+										"name": "takerAssetFilledAmount",
+										"type": "uint256"
+									},
+									{
+										"name": "makerFeePaid",
+										"type": "uint256"
+									},
+									{
+										"name": "takerFeePaid",
+										"type": "uint256"
+									}
+								],
+								"name": "left",
+								"type": "tuple"
+							},
+							{
+								"components": [
+									{
+										"name": "makerAssetFilledAmount",
+										"type": "uint256"
+									},
+									{
+										"name": "takerAssetFilledAmount",
+										"type": "uint256"
+									},
+									{
+										"name": "makerFeePaid",
+										"type": "uint256"
+									},
+									{
+										"name": "takerFeePaid",
+										"type": "uint256"
+									}
+								],
+								"name": "right",
+								"type": "tuple"
+							},
+							{
+								"name": "leftMakerAssetSpreadAmount",
+								"type": "uint256"
+							}
+						],
+						"name": "matchedFillResults",
+						"type": "tuple"
+					}
+				],
+				"payable": false,
+				"stateMutability": "nonpayable",
+				"type": "function"
+			},
+			{
+				"inputs": [
+					{
+						"name": "_exchange",
+						"type": "address"
+					}
+				],
+				"payable": false,
+				"stateMutability": "nonpayable",
+				"type": "constructor"
+			}
+		],
+		"evm": {
+			"bytecode": {
+				"linkReferences": {},
+				"object": 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PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10EA JUMP JUMPDEST PUSH1 0xA0 DUP7 ADD MLOAD PUSH2 0x100 DUP12 ADD MLOAD GT PUSH2 0x342 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10CA JUMP JUMPDEST PUSH1 0x80 DUP1 DUP8 ADD MLOAD SWAP1 DUP13 ADD MLOAD LT ISZERO PUSH2 0x384 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10FA JUMP JUMPDEST PUSH1 0x0 SLOAD PUSH1 0x40 MLOAD PUSH32 0x3C28D86100000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP1 SWAP2 AND SWAP1 PUSH4 0x3C28D861 SWAP1 PUSH2 0x3E0 SWAP1 DUP15 SWAP1 DUP15 SWAP1 DUP15 SWAP1 DUP15 SWAP1 PUSH1 0x4 ADD PUSH2 0x1127 JUMP JUMPDEST PUSH2 0x120 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x3FB JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x40F JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x433 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0xB06 JUMP JUMPDEST SWAP7 POP DUP7 PUSH1 0x40 ADD MLOAD SWAP5 POP PUSH1 0x0 DUP6 GT ISZERO PUSH2 0x5E4 JUMPI PUSH2 0x160 DUP11 ADD MLOAD SWAP4 POP PUSH2 0x45E DUP5 PUSH1 0x10 PUSH4 0xFFFFFFFF PUSH2 0x6C3 AND JUMP JUMPDEST SWAP3 POP PUSH2 0x472 DUP12 PUSH1 0x80 ADD MLOAD DUP8 PUSH1 0x80 ADD MLOAD PUSH2 0x724 JUMP JUMPDEST SWAP2 POP PUSH2 0x47E DUP6 DUP4 PUSH2 0x724 JUMP JUMPDEST SWAP1 POP PUSH1 0x0 DUP2 GT ISZERO PUSH2 0x532 JUMPI DUP10 MLOAD PUSH1 0x40 MLOAD PUSH32 0xA9059CBB00000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP6 AND SWAP2 PUSH4 0xA9059CBB SWAP2 PUSH2 0x4DE SWAP2 SWAP1 DUP6 SWAP1 PUSH1 0x4 ADD PUSH2 0x105F JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x4F8 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x50C JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x530 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0xAE0 JUMP JUMPDEST POP JUMPDEST PUSH1 0x0 DUP3 GT ISZERO PUSH2 0x5E4 JUMPI DUP11 MLOAD PUSH1 0x40 MLOAD PUSH32 0xA9059CBB00000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP6 AND SWAP2 PUSH4 0xA9059CBB SWAP2 PUSH2 0x590 SWAP2 SWAP1 DUP7 SWAP1 PUSH1 0x4 ADD PUSH2 0x105F JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x5AA JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x5BE JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x5E2 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0xAE0 JUMP JUMPDEST POP JUMPDEST POP POP POP POP POP POP SWAP5 SWAP4 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x5FE DUP4 DUP4 PUSH2 0x766 JUMP JUMPDEST SWAP1 POP JUMPDEST SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP4 ISZERO ISZERO PUSH2 0x61A JUMPI PUSH1 0x0 SWAP2 POP PUSH2 0x666 JUMP JUMPDEST POP DUP3 DUP3 MUL DUP3 DUP5 DUP3 DUP2 ISZERO ISZERO PUSH2 0x62A JUMPI INVALID JUMPDEST DIV EQ PUSH2 0x662 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x109A JUMP JUMPDEST DUP1 SWAP2 POP JUMPDEST POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP3 DUP5 DUP2 ISZERO ISZERO PUSH2 0x67B JUMPI INVALID JUMPDEST DIV SWAP5 SWAP4 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP3 DUP3 ADD DUP4 DUP2 LT ISZERO PUSH2 0x662 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x109A JUMP JUMPDEST PUSH1 0x0 DUP2 PUSH1 0x14 ADD DUP4 MLOAD LT ISZERO ISZERO ISZERO PUSH2 0x705 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10DA JUMP JUMPDEST POP ADD PUSH1 0x14 ADD MLOAD PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND SWAP1 JUMP JUMPDEST PUSH1 0x0 DUP3 DUP3 GT ISZERO PUSH2 0x760 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x107A JUMP JUMPDEST POP SWAP1 SUB SWAP1 JUMP JUMPDEST PUSH1 0x0 DUP2 PUSH1 0x20 ADD DUP4 MLOAD LT ISZERO ISZERO ISZERO PUSH2 0x7A8 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x108A JUMP JUMPDEST POP ADD PUSH1 0x20 ADD MLOAD SWAP1 JUMP JUMPDEST PUSH1 0xC0 PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE POP SWAP1 JUMP JUMPDEST PUSH2 0x120 PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 PUSH2 0x7FD PUSH2 0x817 JUMP JUMPDEST DUP2 MSTORE PUSH1 0x20 ADD PUSH2 0x80A PUSH2 0x817 JUMP JUMPDEST DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE POP SWAP1 JUMP JUMPDEST PUSH1 0x80 PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE POP SWAP1 JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 CALLDATALOAD PUSH2 0x11EF JUMP JUMPDEST SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 MLOAD PUSH2 0x120B JUMP JUMPDEST PUSH1 0x0 PUSH1 0x1F DUP3 ADD DUP4 SGT PUSH2 0x870 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP2 CALLDATALOAD PUSH2 0x883 PUSH2 0x87E DUP3 PUSH2 0x11A5 JUMP JUMPDEST PUSH2 0x117E JUMP JUMPDEST SWAP2 POP DUP1 DUP3 MSTORE PUSH1 0x20 DUP4 ADD PUSH1 0x20 DUP4 ADD DUP6 DUP4 DUP4 ADD GT ISZERO PUSH2 0x89F JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x8AA DUP4 DUP3 DUP5 PUSH2 0x1210 JUMP JUMPDEST POP POP POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x80 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x8C5 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x8CF PUSH1 0x80 PUSH2 0x117E JUMP JUMPDEST SWAP1 POP PUSH1 0x0 PUSH2 0x8DD DUP5 DUP5 PUSH2 0xAD4 JUMP JUMPDEST DUP3 MSTORE POP PUSH1 0x20 PUSH2 0x8EE DUP5 DUP5 DUP4 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x20 DUP4 ADD MSTORE POP PUSH1 0x40 PUSH2 0x902 DUP5 DUP3 DUP6 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x40 DUP4 ADD MSTORE POP PUSH1 0x60 PUSH2 0x916 DUP5 DUP3 DUP6 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x60 DUP4 ADD MSTORE POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x120 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x935 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x93F PUSH1 0x60 PUSH2 0x117E JUMP JUMPDEST SWAP1 POP PUSH1 0x0 PUSH2 0x94D DUP5 DUP5 PUSH2 0x8B3 JUMP JUMPDEST DUP3 MSTORE POP PUSH1 0x80 PUSH2 0x95E DUP5 DUP5 DUP4 ADD PUSH2 0x8B3 JUMP JUMPDEST PUSH1 0x20 DUP4 ADD MSTORE POP PUSH2 0x100 PUSH2 0x973 DUP5 DUP3 DUP6 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x40 DUP4 ADD MSTORE POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x180 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x992 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x99D PUSH2 0x180 PUSH2 0x117E JUMP JUMPDEST SWAP1 POP PUSH1 0x0 PUSH2 0x9AB DUP5 DUP5 PUSH2 0x840 JUMP JUMPDEST DUP3 MSTORE POP PUSH1 0x20 PUSH2 0x9BC DUP5 DUP5 DUP4 ADD PUSH2 0x840 JUMP JUMPDEST PUSH1 0x20 DUP4 ADD MSTORE POP PUSH1 0x40 PUSH2 0x9D0 DUP5 DUP3 DUP6 ADD PUSH2 0x840 JUMP JUMPDEST PUSH1 0x40 DUP4 ADD MSTORE POP PUSH1 0x60 PUSH2 0x9E4 DUP5 DUP3 DUP6 ADD PUSH2 0x840 JUMP JUMPDEST PUSH1 0x60 DUP4 ADD MSTORE POP PUSH1 0x80 PUSH2 0x9F8 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0x80 DUP4 ADD MSTORE POP PUSH1 0xA0 PUSH2 0xA0C DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0xA0 DUP4 ADD MSTORE POP PUSH1 0xC0 PUSH2 0xA20 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0xC0 DUP4 ADD MSTORE POP PUSH1 0xE0 PUSH2 0xA34 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0xE0 DUP4 ADD MSTORE POP PUSH2 0x100 PUSH2 0xA49 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH2 0x100 DUP4 ADD MSTORE POP PUSH2 0x120 PUSH2 0xA5F DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH2 0x120 DUP4 ADD MSTORE POP PUSH2 0x140 DUP3 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xA81 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xA8D DUP5 DUP3 DUP6 ADD PUSH2 0x85F JUMP JUMPDEST PUSH2 0x140 DUP4 ADD MSTORE POP PUSH2 0x160 DUP3 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xAAF JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xABB DUP5 DUP3 DUP6 ADD PUSH2 0x85F JUMP JUMPDEST PUSH2 0x160 DUP4 ADD MSTORE POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 CALLDATALOAD PUSH2 0x1208 JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 MLOAD PUSH2 0x1208 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP3 DUP5 SUB SLT ISZERO PUSH2 0xAF2 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH1 0x0 PUSH2 0xAFE DUP5 DUP5 PUSH2 0x853 JUMP JUMPDEST SWAP5 SWAP4 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x120 DUP3 DUP5 SUB SLT ISZERO PUSH2 0xB19 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH1 0x0 PUSH2 0xAFE DUP5 DUP5 PUSH2 0x922 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP3 DUP5 SUB SLT ISZERO PUSH2 0xB37 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP2 CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xB4E JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xAFE DUP5 DUP3 DUP6 ADD PUSH2 0x97F JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x0 DUP1 PUSH1 0x80 DUP6 DUP8 SUB SLT ISZERO PUSH2 0xB70 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP5 CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xB87 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xB93 DUP8 DUP3 DUP9 ADD PUSH2 0x97F JUMP JUMPDEST SWAP5 POP POP PUSH1 0x20 DUP6 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xBB0 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xBBC DUP8 DUP3 DUP9 ADD PUSH2 0x97F JUMP JUMPDEST SWAP4 POP POP PUSH1 0x40 DUP6 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xBD9 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xBE5 DUP8 DUP3 DUP9 ADD PUSH2 0x85F JUMP JUMPDEST SWAP3 POP POP PUSH1 0x60 DUP6 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xC02 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xC0E DUP8 DUP3 DUP9 ADD PUSH2 0x85F JUMP JUMPDEST SWAP2 POP POP SWAP3 SWAP6 SWAP2 SWAP5 POP SWAP3 POP JUMP JUMPDEST PUSH2 0xC23 DUP2 PUSH2 0x11EF JUMP JUMPDEST DUP3 MSTORE POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0xC34 DUP3 PUSH2 0x11EB JUMP JUMPDEST DUP1 DUP5 MSTORE PUSH2 0xC48 DUP2 PUSH1 0x20 DUP7 ADD PUSH1 0x20 DUP7 ADD PUSH2 0x121C JUMP JUMPDEST PUSH2 0xC51 DUP2 PUSH2 0x1248 JUMP JUMPDEST SWAP1 SWAP4 ADD PUSH1 0x20 ADD SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x11 DUP2 MSTORE PUSH32 0x55494E543235365F554E444552464C4F57000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x26 DUP2 MSTORE PUSH32 0x475245415445525F4F525F455155414C5F544F5F33325F4C454E4754485F5245 PUSH1 0x20 DUP3 ADD MSTORE PUSH32 0x5155495245440000000000000000000000000000000000000000000000000000 PUSH1 0x40 DUP3 ADD MSTORE PUSH1 0x60 ADD SWAP1 JUMP JUMPDEST PUSH1 0x10 DUP2 MSTORE PUSH32 0x55494E543235365F4F564552464C4F5700000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x12 DUP2 MSTORE PUSH32 0x494E56414C49445F41535345545F444154410000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x12 DUP2 MSTORE PUSH32 0x494E56414C49445F424547494E5F54494D450000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0xF DUP2 MSTORE PUSH32 0x41554354494F4E5F455850495245440000000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x26 DUP2 MSTORE PUSH32 0x475245415445525F4F525F455155414C5F544F5F32305F4C454E4754485F5245 PUSH1 0x20 DUP3 ADD MSTORE PUSH32 0x5155495245440000000000000000000000000000000000000000000000000000 PUSH1 0x40 DUP3 ADD MSTORE PUSH1 0x60 ADD SWAP1 JUMP JUMPDEST PUSH1 0x13 DUP2 MSTORE PUSH32 0x41554354494F4E5F4E4F545F5354415254454400000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0xE DUP2 MSTORE PUSH32 0x494E56414C49445F414D4F554E54000000000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST DUP1 MLOAD PUSH1 0xC0 DUP4 ADD SWAP1 PUSH2 0xE6B DUP5 DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x20 DUP3 ADD MLOAD PUSH2 0xE7E PUSH1 0x20 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x40 DUP3 ADD MLOAD PUSH2 0xE91 PUSH1 0x40 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x60 DUP3 ADD MLOAD PUSH2 0xEA4 PUSH1 0x60 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x80 DUP3 ADD MLOAD PUSH2 0xEB7 PUSH1 0x80 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xA0 DUP3 ADD MLOAD PUSH2 0xECA PUSH1 0xA0 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP POP POP POP JUMP JUMPDEST DUP1 MLOAD PUSH1 0x80 DUP4 ADD SWAP1 PUSH2 0xEE1 DUP5 DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x20 DUP3 ADD MLOAD PUSH2 0xEF4 PUSH1 0x20 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x40 DUP3 ADD MLOAD PUSH2 0xF07 PUSH1 0x40 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x60 DUP3 ADD MLOAD PUSH2 0xECA PUSH1 0x60 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST DUP1 MLOAD PUSH2 0x120 DUP4 ADD SWAP1 PUSH2 0xF2C DUP5 DUP3 PUSH2 0xED0 JUMP JUMPDEST POP PUSH1 0x20 DUP3 ADD MLOAD PUSH2 0xF3F PUSH1 0x80 DUP6 ADD DUP3 PUSH2 0xED0 JUMP JUMPDEST POP PUSH1 0x40 DUP3 ADD MLOAD PUSH2 0xECA PUSH2 0x100 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST DUP1 MLOAD PUSH1 0x0 SWAP1 PUSH2 0x180 DUP5 ADD SWAP1 PUSH2 0xF68 DUP6 DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x20 DUP4 ADD MLOAD PUSH2 0xF7B PUSH1 0x20 DUP7 ADD DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x40 DUP4 ADD MLOAD PUSH2 0xF8E PUSH1 0x40 DUP7 ADD DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x60 DUP4 ADD MLOAD PUSH2 0xFA1 PUSH1 0x60 DUP7 ADD DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x80 DUP4 ADD MLOAD PUSH2 0xFB4 PUSH1 0x80 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xA0 DUP4 ADD MLOAD PUSH2 0xFC7 PUSH1 0xA0 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xC0 DUP4 ADD MLOAD PUSH2 0xFDA PUSH1 0xC0 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xE0 DUP4 ADD MLOAD PUSH2 0xFED PUSH1 0xE0 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH2 0x100 DUP4 ADD MLOAD PUSH2 0x1002 PUSH2 0x100 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH2 0x120 DUP4 ADD MLOAD PUSH2 0x1017 PUSH2 0x120 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH2 0x140 DUP4 ADD MLOAD DUP5 DUP3 SUB PUSH2 0x140 DUP7 ADD MSTORE PUSH2 0x1031 DUP3 DUP3 PUSH2 0xC29 JUMP JUMPDEST SWAP2 POP POP PUSH2 0x160 DUP4 ADD MLOAD DUP5 DUP3 SUB PUSH2 0x160 DUP7 ADD MSTORE PUSH2 0x104D DUP3 DUP3 PUSH2 0xC29 JUMP JUMPDEST SWAP6 SWAP5 POP POP POP POP POP JUMP JUMPDEST PUSH2 0xC23 DUP2 PUSH2 0x1208 JUMP JUMPDEST PUSH1 0x40 DUP2 ADD PUSH2 0x106D DUP3 DUP6 PUSH2 0xC1A JUMP JUMPDEST PUSH2 0x84C PUSH1 0x20 DUP4 ADD DUP5 PUSH2 0x1056 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xC5E JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xC8E JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xCE4 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xD14 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xD44 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xD74 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xDA4 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xDFA JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xE2A JUMP JUMPDEST PUSH1 0xC0 DUP2 ADD PUSH2 0x601 DUP3 DUP5 PUSH2 0xE5A JUMP JUMPDEST PUSH2 0x120 DUP2 ADD PUSH2 0x601 DUP3 DUP5 PUSH2 0xF1A JUMP JUMPDEST PUSH1 0x80 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x1138 DUP2 DUP8 PUSH2 0xF53 JUMP JUMPDEST SWAP1 POP DUP2 DUP2 SUB PUSH1 0x20 DUP4 ADD MSTORE PUSH2 0x114C DUP2 DUP7 PUSH2 0xF53 JUMP JUMPDEST SWAP1 POP DUP2 DUP2 SUB PUSH1 0x40 DUP4 ADD MSTORE PUSH2 0x1160 DUP2 DUP6 PUSH2 0xC29 JUMP JUMPDEST SWAP1 POP DUP2 DUP2 SUB PUSH1 0x60 DUP4 ADD MSTORE PUSH2 0x1174 DUP2 DUP5 PUSH2 0xC29 JUMP JUMPDEST SWAP7 SWAP6 POP POP POP POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD DUP2 DUP2 ADD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT DUP3 DUP3 LT OR ISZERO PUSH2 0x119D JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH1 0x40 MSTORE SWAP2 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 PUSH8 0xFFFFFFFFFFFFFFFF DUP3 GT ISZERO PUSH2 0x11BC JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH1 0x20 PUSH1 0x1F SWAP2 SWAP1 SWAP2 ADD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 AND ADD SWAP1 JUMP JUMPDEST MLOAD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND SWAP1 JUMP JUMPDEST SWAP1 JUMP JUMPDEST ISZERO ISZERO SWAP1 JUMP JUMPDEST DUP3 DUP2 DUP4 CALLDATACOPY POP PUSH1 0x0 SWAP2 ADD MSTORE JUMP JUMPDEST PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0x1237 JUMPI DUP2 DUP2 ADD MLOAD DUP4 DUP3 ADD MSTORE PUSH1 0x20 ADD PUSH2 0x121F JUMP JUMPDEST DUP4 DUP2 GT ISZERO PUSH2 0xECA JUMPI POP POP PUSH1 0x0 SWAP2 ADD MSTORE JUMP JUMPDEST PUSH1 0x1F ADD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 AND SWAP1 JUMP STOP LOG2 PUSH6 0x627A7A723058 KECCAK256 SWAP13 0xf7 SIGNEXTEND DIV 0xb7 0x5f 0xc2 RETURNDATACOPY PUSH8 0x62AE4C6C8F25CCAD 0x25 0xdf 0xcb CODECOPY 0xcf SAR 0xd3 SWAP7 PUSH15 0xB27CE513DE036C6578706572696D65 PUSH15 0x74616CF50037000000000000000000 ",
+				"sourceMap": "986:9378:28:-;;;1673:99;8:9:-1;5:2;;;30:1;27;20:12;5:2;1673:99:28;;;;;;;;;;;;;;;;;;;;;;1734:8;:31;;-1:-1:-1;;;;;;1734:31:28;-1:-1:-1;;;;;1734:31:28;;;;;;;;;;986:9378;;5:122:-1;;83:39;114:6;108:13;83:39;;;74:48;68:59;-1:-1;;;68:59;134:263;;249:2;237:9;228:7;224:23;220:32;217:2;;;265:1;262;255:12;217:2;300:1;317:64;373:7;353:9;317:64;;;307:74;211:186;-1:-1;;;;211:186;404:128;-1:-1;;;;;473:54;;456:76;;986:9378:28;;;;;;"
+			},
+			"deployedBytecode": {
+				"linkReferences": {},
+				"object": 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+				"opcodes": "PUSH1 0x80 PUSH1 0x40 MSTORE PUSH1 0x4 CALLDATASIZE LT PUSH2 0x4B JUMPI PUSH4 0xFFFFFFFF PUSH29 0x100000000000000000000000000000000000000000000000000000000 PUSH1 0x0 CALLDATALOAD DIV AND PUSH4 0x2E9CD033 DUP2 EQ PUSH2 0x50 JUMPI DUP1 PUSH4 0x3C28D861 EQ PUSH2 0x86 JUMPI JUMPDEST PUSH1 0x0 DUP1 REVERT JUMPDEST CALLVALUE DUP1 ISZERO PUSH2 0x5C JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH2 0x70 PUSH2 0x6B CALLDATASIZE PUSH1 0x4 PUSH2 0xB25 JUMP JUMPDEST PUSH2 0xB3 JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH2 0x7D SWAP2 SWAP1 PUSH2 0x110A JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 RETURN JUMPDEST CALLVALUE DUP1 ISZERO PUSH2 0x92 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH2 0xA6 PUSH2 0xA1 CALLDATASIZE PUSH1 0x4 PUSH2 0xB5A JUMP JUMPDEST PUSH2 0x29C JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH2 0x7D SWAP2 SWAP1 PUSH2 0x1118 JUMP JUMPDEST PUSH2 0xBB PUSH2 0x7B1 JUMP JUMPDEST PUSH2 0x140 DUP3 ADD MLOAD MLOAD PUSH1 0x0 DUP1 DUP1 DUP1 DUP1 DUP1 DUP1 PUSH1 0x64 DUP9 LT ISZERO PUSH2 0x10E JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10AA JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 REVERT JUMPDEST PUSH2 0x140 DUP11 ADD MLOAD PUSH2 0x146 SWAP1 PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC0 DUP11 ADD PUSH4 0xFFFFFFFF PUSH2 0x5F2 AND JUMP JUMPDEST PUSH2 0x140 DUP12 ADD MLOAD SWAP1 SWAP8 POP PUSH2 0x181 SWAP1 PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 DUP11 ADD PUSH4 0xFFFFFFFF PUSH2 0x5F2 AND JUMP JUMPDEST SWAP6 POP DUP7 DUP11 PUSH2 0x100 ADD MLOAD GT ISZERO ISZERO PUSH2 0x1C3 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10BA JUMP JUMPDEST DUP7 DUP11 PUSH2 0x100 ADD MLOAD SUB SWAP5 POP DUP10 PUSH1 0xA0 ADD MLOAD SWAP4 POP DUP4 DUP7 GT ISZERO ISZERO PUSH2 0x20F JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10FA JUMP JUMPDEST POP POP POP DUP4 DUP7 MSTORE PUSH2 0x100 DUP8 ADD DUP1 MLOAD PUSH1 0x20 DUP9 ADD MSTORE PUSH1 0x40 DUP8 ADD DUP5 SWAP1 MSTORE PUSH1 0x60 DUP8 ADD DUP3 SWAP1 MSTORE TIMESTAMP PUSH1 0xA0 DUP9 ADD DUP2 SWAP1 MSTORE SWAP1 MLOAD DUP3 DUP6 SUB SWAP2 SWAP1 DUP2 SWAP1 SUB DUP7 DUP3 LT ISZERO PUSH2 0x255 JUMPI PUSH1 0x80 DUP10 ADD DUP7 SWAP1 MSTORE PUSH2 0x28F JUMP JUMPDEST PUSH2 0x100 DUP11 ADD MLOAD DUP3 LT PUSH2 0x26D JUMPI PUSH1 0x80 DUP10 ADD DUP5 SWAP1 MSTORE PUSH2 0x28F JUMP JUMPDEST PUSH2 0x289 DUP5 PUSH2 0x284 PUSH2 0x27E DUP5 DUP8 PUSH2 0x607 JUMP JUMPDEST DUP9 PUSH2 0x66D JUMP JUMPDEST PUSH2 0x684 JUMP JUMPDEST PUSH1 0x80 DUP11 ADD MSTORE JUMPDEST POP POP POP POP POP POP POP POP SWAP2 SWAP1 POP JUMP JUMPDEST PUSH2 0x2A4 PUSH2 0x7E8 JUMP JUMPDEST PUSH2 0x2AC PUSH2 0x7B1 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x60 PUSH1 0x0 DUP1 PUSH1 0x0 PUSH2 0x2BE DUP11 PUSH2 0xB3 JUMP JUMPDEST DUP1 MLOAD PUSH1 0xA0 DUP3 ADD MLOAD SWAP2 SWAP8 POP GT ISZERO PUSH2 0x300 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10EA JUMP JUMPDEST PUSH1 0xA0 DUP7 ADD MLOAD PUSH2 0x100 DUP12 ADD MLOAD GT PUSH2 0x342 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10CA JUMP JUMPDEST PUSH1 0x80 DUP1 DUP8 ADD MLOAD SWAP1 DUP13 ADD MLOAD LT ISZERO PUSH2 0x384 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10FA JUMP JUMPDEST PUSH1 0x0 SLOAD PUSH1 0x40 MLOAD PUSH32 0x3C28D86100000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP1 SWAP2 AND SWAP1 PUSH4 0x3C28D861 SWAP1 PUSH2 0x3E0 SWAP1 DUP15 SWAP1 DUP15 SWAP1 DUP15 SWAP1 DUP15 SWAP1 PUSH1 0x4 ADD PUSH2 0x1127 JUMP JUMPDEST PUSH2 0x120 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x3FB JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x40F JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x433 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0xB06 JUMP JUMPDEST SWAP7 POP DUP7 PUSH1 0x40 ADD MLOAD SWAP5 POP PUSH1 0x0 DUP6 GT ISZERO PUSH2 0x5E4 JUMPI PUSH2 0x160 DUP11 ADD MLOAD SWAP4 POP PUSH2 0x45E DUP5 PUSH1 0x10 PUSH4 0xFFFFFFFF PUSH2 0x6C3 AND JUMP JUMPDEST SWAP3 POP PUSH2 0x472 DUP12 PUSH1 0x80 ADD MLOAD DUP8 PUSH1 0x80 ADD MLOAD PUSH2 0x724 JUMP JUMPDEST SWAP2 POP PUSH2 0x47E DUP6 DUP4 PUSH2 0x724 JUMP JUMPDEST SWAP1 POP PUSH1 0x0 DUP2 GT ISZERO PUSH2 0x532 JUMPI DUP10 MLOAD PUSH1 0x40 MLOAD PUSH32 0xA9059CBB00000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP6 AND SWAP2 PUSH4 0xA9059CBB SWAP2 PUSH2 0x4DE SWAP2 SWAP1 DUP6 SWAP1 PUSH1 0x4 ADD PUSH2 0x105F JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x4F8 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x50C JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x530 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0xAE0 JUMP JUMPDEST POP JUMPDEST PUSH1 0x0 DUP3 GT ISZERO PUSH2 0x5E4 JUMPI DUP11 MLOAD PUSH1 0x40 MLOAD PUSH32 0xA9059CBB00000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP6 AND SWAP2 PUSH4 0xA9059CBB SWAP2 PUSH2 0x590 SWAP2 SWAP1 DUP7 SWAP1 PUSH1 0x4 ADD PUSH2 0x105F JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x5AA JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x5BE JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x5E2 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0xAE0 JUMP JUMPDEST POP JUMPDEST POP POP POP POP POP POP SWAP5 SWAP4 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x5FE DUP4 DUP4 PUSH2 0x766 JUMP JUMPDEST SWAP1 POP JUMPDEST SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP4 ISZERO ISZERO PUSH2 0x61A JUMPI PUSH1 0x0 SWAP2 POP PUSH2 0x666 JUMP JUMPDEST POP DUP3 DUP3 MUL DUP3 DUP5 DUP3 DUP2 ISZERO ISZERO PUSH2 0x62A JUMPI INVALID JUMPDEST DIV EQ PUSH2 0x662 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x109A JUMP JUMPDEST DUP1 SWAP2 POP JUMPDEST POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP3 DUP5 DUP2 ISZERO ISZERO PUSH2 0x67B JUMPI INVALID JUMPDEST DIV SWAP5 SWAP4 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP3 DUP3 ADD DUP4 DUP2 LT ISZERO PUSH2 0x662 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x109A JUMP JUMPDEST PUSH1 0x0 DUP2 PUSH1 0x14 ADD DUP4 MLOAD LT ISZERO ISZERO ISZERO PUSH2 0x705 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x10DA JUMP JUMPDEST POP ADD PUSH1 0x14 ADD MLOAD PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND SWAP1 JUMP JUMPDEST PUSH1 0x0 DUP3 DUP3 GT ISZERO PUSH2 0x760 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x107A JUMP JUMPDEST POP SWAP1 SUB SWAP1 JUMP JUMPDEST PUSH1 0x0 DUP2 PUSH1 0x20 ADD DUP4 MLOAD LT ISZERO ISZERO ISZERO PUSH2 0x7A8 JUMPI PUSH1 0x40 MLOAD PUSH32 0x8C379A000000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0x105 SWAP1 PUSH2 0x108A JUMP JUMPDEST POP ADD PUSH1 0x20 ADD MLOAD SWAP1 JUMP JUMPDEST PUSH1 0xC0 PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE POP SWAP1 JUMP JUMPDEST PUSH2 0x120 PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 PUSH2 0x7FD PUSH2 0x817 JUMP JUMPDEST DUP2 MSTORE PUSH1 0x20 ADD PUSH2 0x80A PUSH2 0x817 JUMP JUMPDEST DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE POP SWAP1 JUMP JUMPDEST PUSH1 0x80 PUSH1 0x40 MLOAD SWAP1 DUP2 ADD PUSH1 0x40 MSTORE DUP1 PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE PUSH1 0x20 ADD PUSH1 0x0 DUP2 MSTORE POP SWAP1 JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 CALLDATALOAD PUSH2 0x11EF JUMP JUMPDEST SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 MLOAD PUSH2 0x120B JUMP JUMPDEST PUSH1 0x0 PUSH1 0x1F DUP3 ADD DUP4 SGT PUSH2 0x870 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP2 CALLDATALOAD PUSH2 0x883 PUSH2 0x87E DUP3 PUSH2 0x11A5 JUMP JUMPDEST PUSH2 0x117E JUMP JUMPDEST SWAP2 POP DUP1 DUP3 MSTORE PUSH1 0x20 DUP4 ADD PUSH1 0x20 DUP4 ADD DUP6 DUP4 DUP4 ADD GT ISZERO PUSH2 0x89F JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x8AA DUP4 DUP3 DUP5 PUSH2 0x1210 JUMP JUMPDEST POP POP POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x80 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x8C5 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x8CF PUSH1 0x80 PUSH2 0x117E JUMP JUMPDEST SWAP1 POP PUSH1 0x0 PUSH2 0x8DD DUP5 DUP5 PUSH2 0xAD4 JUMP JUMPDEST DUP3 MSTORE POP PUSH1 0x20 PUSH2 0x8EE DUP5 DUP5 DUP4 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x20 DUP4 ADD MSTORE POP PUSH1 0x40 PUSH2 0x902 DUP5 DUP3 DUP6 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x40 DUP4 ADD MSTORE POP PUSH1 0x60 PUSH2 0x916 DUP5 DUP3 DUP6 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x60 DUP4 ADD MSTORE POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x120 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x935 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x93F PUSH1 0x60 PUSH2 0x117E JUMP JUMPDEST SWAP1 POP PUSH1 0x0 PUSH2 0x94D DUP5 DUP5 PUSH2 0x8B3 JUMP JUMPDEST DUP3 MSTORE POP PUSH1 0x80 PUSH2 0x95E DUP5 DUP5 DUP4 ADD PUSH2 0x8B3 JUMP JUMPDEST PUSH1 0x20 DUP4 ADD MSTORE POP PUSH2 0x100 PUSH2 0x973 DUP5 DUP3 DUP6 ADD PUSH2 0xAD4 JUMP JUMPDEST PUSH1 0x40 DUP4 ADD MSTORE POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x180 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x992 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x99D PUSH2 0x180 PUSH2 0x117E JUMP JUMPDEST SWAP1 POP PUSH1 0x0 PUSH2 0x9AB DUP5 DUP5 PUSH2 0x840 JUMP JUMPDEST DUP3 MSTORE POP PUSH1 0x20 PUSH2 0x9BC DUP5 DUP5 DUP4 ADD PUSH2 0x840 JUMP JUMPDEST PUSH1 0x20 DUP4 ADD MSTORE POP PUSH1 0x40 PUSH2 0x9D0 DUP5 DUP3 DUP6 ADD PUSH2 0x840 JUMP JUMPDEST PUSH1 0x40 DUP4 ADD MSTORE POP PUSH1 0x60 PUSH2 0x9E4 DUP5 DUP3 DUP6 ADD PUSH2 0x840 JUMP JUMPDEST PUSH1 0x60 DUP4 ADD MSTORE POP PUSH1 0x80 PUSH2 0x9F8 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0x80 DUP4 ADD MSTORE POP PUSH1 0xA0 PUSH2 0xA0C DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0xA0 DUP4 ADD MSTORE POP PUSH1 0xC0 PUSH2 0xA20 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0xC0 DUP4 ADD MSTORE POP PUSH1 0xE0 PUSH2 0xA34 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH1 0xE0 DUP4 ADD MSTORE POP PUSH2 0x100 PUSH2 0xA49 DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH2 0x100 DUP4 ADD MSTORE POP PUSH2 0x120 PUSH2 0xA5F DUP5 DUP3 DUP6 ADD PUSH2 0xAC8 JUMP JUMPDEST PUSH2 0x120 DUP4 ADD MSTORE POP PUSH2 0x140 DUP3 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xA81 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xA8D DUP5 DUP3 DUP6 ADD PUSH2 0x85F JUMP JUMPDEST PUSH2 0x140 DUP4 ADD MSTORE POP PUSH2 0x160 DUP3 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xAAF JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xABB DUP5 DUP3 DUP6 ADD PUSH2 0x85F JUMP JUMPDEST PUSH2 0x160 DUP4 ADD MSTORE POP SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 CALLDATALOAD PUSH2 0x1208 JUMP JUMPDEST PUSH1 0x0 PUSH2 0x84C DUP3 MLOAD PUSH2 0x1208 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP3 DUP5 SUB SLT ISZERO PUSH2 0xAF2 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH1 0x0 PUSH2 0xAFE DUP5 DUP5 PUSH2 0x853 JUMP JUMPDEST SWAP5 SWAP4 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x120 DUP3 DUP5 SUB SLT ISZERO PUSH2 0xB19 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH1 0x0 PUSH2 0xAFE DUP5 DUP5 PUSH2 0x922 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP3 DUP5 SUB SLT ISZERO PUSH2 0xB37 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP2 CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xB4E JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xAFE DUP5 DUP3 DUP6 ADD PUSH2 0x97F JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x0 DUP1 PUSH1 0x80 DUP6 DUP8 SUB SLT ISZERO PUSH2 0xB70 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST DUP5 CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xB87 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xB93 DUP8 DUP3 DUP9 ADD PUSH2 0x97F JUMP JUMPDEST SWAP5 POP POP PUSH1 0x20 DUP6 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xBB0 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xBBC DUP8 DUP3 DUP9 ADD PUSH2 0x97F JUMP JUMPDEST SWAP4 POP POP PUSH1 0x40 DUP6 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xBD9 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xBE5 DUP8 DUP3 DUP9 ADD PUSH2 0x85F JUMP JUMPDEST SWAP3 POP POP PUSH1 0x60 DUP6 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0xC02 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0xC0E DUP8 DUP3 DUP9 ADD PUSH2 0x85F JUMP JUMPDEST SWAP2 POP POP SWAP3 SWAP6 SWAP2 SWAP5 POP SWAP3 POP JUMP JUMPDEST PUSH2 0xC23 DUP2 PUSH2 0x11EF JUMP JUMPDEST DUP3 MSTORE POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0xC34 DUP3 PUSH2 0x11EB JUMP JUMPDEST DUP1 DUP5 MSTORE PUSH2 0xC48 DUP2 PUSH1 0x20 DUP7 ADD PUSH1 0x20 DUP7 ADD PUSH2 0x121C JUMP JUMPDEST PUSH2 0xC51 DUP2 PUSH2 0x1248 JUMP JUMPDEST SWAP1 SWAP4 ADD PUSH1 0x20 ADD SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x11 DUP2 MSTORE PUSH32 0x55494E543235365F554E444552464C4F57000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x26 DUP2 MSTORE PUSH32 0x475245415445525F4F525F455155414C5F544F5F33325F4C454E4754485F5245 PUSH1 0x20 DUP3 ADD MSTORE PUSH32 0x5155495245440000000000000000000000000000000000000000000000000000 PUSH1 0x40 DUP3 ADD MSTORE PUSH1 0x60 ADD SWAP1 JUMP JUMPDEST PUSH1 0x10 DUP2 MSTORE PUSH32 0x55494E543235365F4F564552464C4F5700000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x12 DUP2 MSTORE PUSH32 0x494E56414C49445F41535345545F444154410000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x12 DUP2 MSTORE PUSH32 0x494E56414C49445F424547494E5F54494D450000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0xF DUP2 MSTORE PUSH32 0x41554354494F4E5F455850495245440000000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0x26 DUP2 MSTORE PUSH32 0x475245415445525F4F525F455155414C5F544F5F32305F4C454E4754485F5245 PUSH1 0x20 DUP3 ADD MSTORE PUSH32 0x5155495245440000000000000000000000000000000000000000000000000000 PUSH1 0x40 DUP3 ADD MSTORE PUSH1 0x60 ADD SWAP1 JUMP JUMPDEST PUSH1 0x13 DUP2 MSTORE PUSH32 0x41554354494F4E5F4E4F545F5354415254454400000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH1 0xE DUP2 MSTORE PUSH32 0x494E56414C49445F414D4F554E54000000000000000000000000000000000000 PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST DUP1 MLOAD PUSH1 0xC0 DUP4 ADD SWAP1 PUSH2 0xE6B DUP5 DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x20 DUP3 ADD MLOAD PUSH2 0xE7E PUSH1 0x20 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x40 DUP3 ADD MLOAD PUSH2 0xE91 PUSH1 0x40 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x60 DUP3 ADD MLOAD PUSH2 0xEA4 PUSH1 0x60 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x80 DUP3 ADD MLOAD PUSH2 0xEB7 PUSH1 0x80 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xA0 DUP3 ADD MLOAD PUSH2 0xECA PUSH1 0xA0 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP POP POP POP JUMP JUMPDEST DUP1 MLOAD PUSH1 0x80 DUP4 ADD SWAP1 PUSH2 0xEE1 DUP5 DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x20 DUP3 ADD MLOAD PUSH2 0xEF4 PUSH1 0x20 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x40 DUP3 ADD MLOAD PUSH2 0xF07 PUSH1 0x40 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0x60 DUP3 ADD MLOAD PUSH2 0xECA PUSH1 0x60 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST DUP1 MLOAD PUSH2 0x120 DUP4 ADD SWAP1 PUSH2 0xF2C DUP5 DUP3 PUSH2 0xED0 JUMP JUMPDEST POP PUSH1 0x20 DUP3 ADD MLOAD PUSH2 0xF3F PUSH1 0x80 DUP6 ADD DUP3 PUSH2 0xED0 JUMP JUMPDEST POP PUSH1 0x40 DUP3 ADD MLOAD PUSH2 0xECA PUSH2 0x100 DUP6 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST DUP1 MLOAD PUSH1 0x0 SWAP1 PUSH2 0x180 DUP5 ADD SWAP1 PUSH2 0xF68 DUP6 DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x20 DUP4 ADD MLOAD PUSH2 0xF7B PUSH1 0x20 DUP7 ADD DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x40 DUP4 ADD MLOAD PUSH2 0xF8E PUSH1 0x40 DUP7 ADD DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x60 DUP4 ADD MLOAD PUSH2 0xFA1 PUSH1 0x60 DUP7 ADD DUP3 PUSH2 0xC1A JUMP JUMPDEST POP PUSH1 0x80 DUP4 ADD MLOAD PUSH2 0xFB4 PUSH1 0x80 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xA0 DUP4 ADD MLOAD PUSH2 0xFC7 PUSH1 0xA0 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xC0 DUP4 ADD MLOAD PUSH2 0xFDA PUSH1 0xC0 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH1 0xE0 DUP4 ADD MLOAD PUSH2 0xFED PUSH1 0xE0 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH2 0x100 DUP4 ADD MLOAD PUSH2 0x1002 PUSH2 0x100 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH2 0x120 DUP4 ADD MLOAD PUSH2 0x1017 PUSH2 0x120 DUP7 ADD DUP3 PUSH2 0x1056 JUMP JUMPDEST POP PUSH2 0x140 DUP4 ADD MLOAD DUP5 DUP3 SUB PUSH2 0x140 DUP7 ADD MSTORE PUSH2 0x1031 DUP3 DUP3 PUSH2 0xC29 JUMP JUMPDEST SWAP2 POP POP PUSH2 0x160 DUP4 ADD MLOAD DUP5 DUP3 SUB PUSH2 0x160 DUP7 ADD MSTORE PUSH2 0x104D DUP3 DUP3 PUSH2 0xC29 JUMP JUMPDEST SWAP6 SWAP5 POP POP POP POP POP JUMP JUMPDEST PUSH2 0xC23 DUP2 PUSH2 0x1208 JUMP JUMPDEST PUSH1 0x40 DUP2 ADD PUSH2 0x106D DUP3 DUP6 PUSH2 0xC1A JUMP JUMPDEST PUSH2 0x84C PUSH1 0x20 DUP4 ADD DUP5 PUSH2 0x1056 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xC5E JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xC8E JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xCE4 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xD14 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xD44 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xD74 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xDA4 JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xDFA JUMP JUMPDEST PUSH1 0x20 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x601 DUP2 PUSH2 0xE2A JUMP JUMPDEST PUSH1 0xC0 DUP2 ADD PUSH2 0x601 DUP3 DUP5 PUSH2 0xE5A JUMP JUMPDEST PUSH2 0x120 DUP2 ADD PUSH2 0x601 DUP3 DUP5 PUSH2 0xF1A JUMP JUMPDEST PUSH1 0x80 DUP1 DUP3 MSTORE DUP2 ADD PUSH2 0x1138 DUP2 DUP8 PUSH2 0xF53 JUMP JUMPDEST SWAP1 POP DUP2 DUP2 SUB PUSH1 0x20 DUP4 ADD MSTORE PUSH2 0x114C DUP2 DUP7 PUSH2 0xF53 JUMP JUMPDEST SWAP1 POP DUP2 DUP2 SUB PUSH1 0x40 DUP4 ADD MSTORE PUSH2 0x1160 DUP2 DUP6 PUSH2 0xC29 JUMP JUMPDEST SWAP1 POP DUP2 DUP2 SUB PUSH1 0x60 DUP4 ADD MSTORE PUSH2 0x1174 DUP2 DUP5 PUSH2 0xC29 JUMP JUMPDEST SWAP7 SWAP6 POP POP POP POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD DUP2 DUP2 ADD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT DUP3 DUP3 LT OR ISZERO PUSH2 0x119D JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH1 0x40 MSTORE SWAP2 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 PUSH8 0xFFFFFFFFFFFFFFFF DUP3 GT ISZERO PUSH2 0x11BC JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH1 0x20 PUSH1 0x1F SWAP2 SWAP1 SWAP2 ADD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 AND ADD SWAP1 JUMP JUMPDEST MLOAD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND SWAP1 JUMP JUMPDEST SWAP1 JUMP JUMPDEST ISZERO ISZERO SWAP1 JUMP JUMPDEST DUP3 DUP2 DUP4 CALLDATACOPY POP PUSH1 0x0 SWAP2 ADD MSTORE JUMP JUMPDEST PUSH1 0x0 JUMPDEST DUP4 DUP2 LT ISZERO PUSH2 0x1237 JUMPI DUP2 DUP2 ADD MLOAD DUP4 DUP3 ADD MSTORE PUSH1 0x20 ADD PUSH2 0x121F JUMP JUMPDEST DUP4 DUP2 GT ISZERO PUSH2 0xECA JUMPI POP POP PUSH1 0x0 SWAP2 ADD MSTORE JUMP JUMPDEST PUSH1 0x1F ADD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 AND SWAP1 JUMP STOP LOG2 PUSH6 0x627A7A723058 KECCAK256 SWAP13 0xf7 SIGNEXTEND DIV 0xb7 0x5f 0xc2 RETURNDATACOPY PUSH8 0x62AE4C6C8F25CCAD 0x25 0xdf 0xcb CODECOPY 0xcf SAR 0xd3 SWAP7 PUSH15 0xB27CE513DE036C6578706572696D65 PUSH15 0x74616CF50037000000000000000000 ",
+				"sourceMap": 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+			}
+		}
+	},
+    "networks": {}
+}
diff --git a/packages/contract-artifacts/src/index.ts b/packages/contract-artifacts/src/index.ts
index f30276dd9..bd5f8fee3 100644
--- a/packages/contract-artifacts/src/index.ts
+++ b/packages/contract-artifacts/src/index.ts
@@ -1,4 +1,5 @@
 import * as AssetProxyOwner from '../artifacts/AssetProxyOwner.json';
+import * as DutchAuction from '../artifacts/DutchAuction.json';
 import * as DummyERC20Token from '../artifacts/DummyERC20Token.json';
 import * as DummyERC721Token from '../artifacts/DummyERC721Token.json';
 import * as ERC20Proxy from '../artifacts/ERC20Proxy.json';
@@ -15,6 +16,7 @@ import * as ZRXToken from '../artifacts/ZRXToken.json';
 
 export {
     AssetProxyOwner,
+    DutchAuction,
     DummyERC20Token,
     DummyERC721Token,
     ERC20Proxy,
diff --git a/packages/contract-artifacts/tsconfig.json b/packages/contract-artifacts/tsconfig.json
index cce086209..59169fceb 100644
--- a/packages/contract-artifacts/tsconfig.json
+++ b/packages/contract-artifacts/tsconfig.json
@@ -8,6 +8,7 @@
     "include": ["./src/**/*"],
     "files": [
         "./artifacts/AssetProxyOwner.json",
+        "./artifacts/DutchAuction.json",
         "./artifacts/DummyERC20Token.json",
         "./artifacts/DummyERC721Token.json",
         "./artifacts/ERC20Proxy.json",
diff --git a/packages/contract-wrappers/CHANGELOG.json b/packages/contract-wrappers/CHANGELOG.json
index 581fbdee1..677292030 100644
--- a/packages/contract-wrappers/CHANGELOG.json
+++ b/packages/contract-wrappers/CHANGELOG.json
@@ -3,6 +3,15 @@
         "version": "4.2.0",
         "changes": [
             {
+                "note": "Added Dutch Auction wrapper",
+                "pr": 1465
+            }
+        ]
+    },
+    {
+        "version": "4.1.4",
+        "changes": [
+            {
                 "note": "Add support for Trust Wallet signature denial error"
             },
             {
diff --git a/packages/contract-wrappers/package.json b/packages/contract-wrappers/package.json
index f3f7301fd..e4de75ab2 100644
--- a/packages/contract-wrappers/package.json
+++ b/packages/contract-wrappers/package.json
@@ -69,6 +69,7 @@
         "@0x/assert": "^1.0.20",
         "@0x/contract-addresses": "^2.0.0",
         "@0x/contract-artifacts": "^1.1.2",
+        "@0x/contracts-test-utils": "^1.0.2",
         "@0x/fill-scenarios": "^1.0.16",
         "@0x/json-schemas": "^2.1.4",
         "@0x/order-utils": "^3.0.7",
@@ -76,6 +77,7 @@
         "@0x/typescript-typings": "^3.0.6",
         "@0x/utils": "^2.0.8",
         "@0x/web3-wrapper": "^3.2.1",
+        "ethereumjs-abi": "0.6.5",
         "ethereum-types": "^1.1.4",
         "ethereumjs-blockstream": "6.0.0",
         "ethereumjs-util": "^5.1.1",
diff --git a/packages/contract-wrappers/src/contract_wrappers.ts b/packages/contract-wrappers/src/contract_wrappers.ts
index 0c535bd5c..4e594593e 100644
--- a/packages/contract-wrappers/src/contract_wrappers.ts
+++ b/packages/contract-wrappers/src/contract_wrappers.ts
@@ -12,6 +12,7 @@ import { Web3Wrapper } from '@0x/web3-wrapper';
 import { Provider } from 'ethereum-types';
 import * as _ from 'lodash';
 
+import { DutchAuctionWrapper } from './contract_wrappers/dutch_auction_wrapper';
 import { ERC20ProxyWrapper } from './contract_wrappers/erc20_proxy_wrapper';
 import { ERC20TokenWrapper } from './contract_wrappers/erc20_token_wrapper';
 import { ERC721ProxyWrapper } from './contract_wrappers/erc721_proxy_wrapper';
@@ -65,6 +66,10 @@ export class ContractWrappers {
      * An instance of the OrderValidatorWrapper class containing methods for interacting with any OrderValidator smart contract.
      */
     public orderValidator: OrderValidatorWrapper;
+    /**
+     * An instance of the DutchAuctionWrapper class containing methods for interacting with any DutchAuction smart contract.
+     */
+    public dutchAuction: DutchAuctionWrapper;
 
     private readonly _web3Wrapper: Web3Wrapper;
     /**
@@ -141,6 +146,11 @@ export class ContractWrappers {
             config.networkId,
             contractAddresses.orderValidator,
         );
+        this.dutchAuction = new DutchAuctionWrapper(
+            this._web3Wrapper,
+            config.networkId,
+            contractAddresses.dutchAuction,
+        );
     }
     /**
      * Unsubscribes from all subscriptions for all contracts.
diff --git a/packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts
new file mode 100644
index 000000000..c1aceff47
--- /dev/null
+++ b/packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts
@@ -0,0 +1,182 @@
+import { DutchAuctionContract } from '@0x/abi-gen-wrappers';
+import { DutchAuction } from '@0x/contract-artifacts';
+import { schemas } from '@0x/json-schemas';
+import { assetDataUtils } from '@0x/order-utils';
+import { DutchAuctionDetails, SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import { ContractAbi } from 'ethereum-types';
+import * as ethAbi from 'ethereumjs-abi';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { orderTxOptsSchema } from '../schemas/order_tx_opts_schema';
+import { txOptsSchema } from '../schemas/tx_opts_schema';
+import { DutchAuctionData, DutchAuctionWrapperError, OrderTransactionOpts } from '../types';
+import { assert } from '../utils/assert';
+import { _getDefaultContractAddresses } from '../utils/contract_addresses';
+
+import { ContractWrapper } from './contract_wrapper';
+
+export class DutchAuctionWrapper extends ContractWrapper {
+    public abi: ContractAbi = DutchAuction.compilerOutput.abi;
+    public address: string;
+    private _dutchAuctionContractIfExists?: DutchAuctionContract;
+    /**
+     * Dutch auction details are encoded with the asset data for a 0x order. This function produces a hex
+     * encoded assetData string, containing information both about the asset being traded and the
+     * dutch auction; which is usable in the makerAssetData or takerAssetData fields in a 0x order.
+     * @param assetData Hex encoded assetData string for the asset being auctioned.
+     * @param beginTimeSeconds Begin time of the dutch auction.
+     * @param beginAmount Starting amount being sold in the dutch auction.
+     * @return The hex encoded assetData string.
+     */
+    public static encodeDutchAuctionAssetData(
+        assetData: string,
+        beginTimeSeconds: BigNumber,
+        beginAmount: BigNumber,
+    ): string {
+        const assetDataBuffer = ethUtil.toBuffer(assetData);
+        const abiEncodedAuctionData = (ethAbi as any).rawEncode(
+            ['uint256', 'uint256'],
+            [beginTimeSeconds.toString(), beginAmount.toString()],
+        );
+        const abiEncodedAuctionDataBuffer = ethUtil.toBuffer(abiEncodedAuctionData);
+        const dutchAuctionDataBuffer = Buffer.concat([assetDataBuffer, abiEncodedAuctionDataBuffer]);
+        const dutchAuctionData = ethUtil.bufferToHex(dutchAuctionDataBuffer);
+        return dutchAuctionData;
+    }
+    /**
+     * Dutch auction details are encoded with the asset data for a 0x order. This function decodes a hex
+     * encoded assetData string, containing information both about the asset being traded and the
+     * dutch auction.
+     * @param dutchAuctionData Hex encoded assetData string for the asset being auctioned.
+     * @return An object containing the auction asset, auction begin time and auction begin amount.
+     */
+    public static decodeDutchAuctionData(dutchAuctionData: string): DutchAuctionData {
+        const dutchAuctionDataBuffer = ethUtil.toBuffer(dutchAuctionData);
+        // Decode asset data
+        const dutchAuctionDataLengthInBytes = 64;
+        const assetDataBuffer = dutchAuctionDataBuffer.slice(
+            0,
+            dutchAuctionDataBuffer.byteLength - dutchAuctionDataLengthInBytes,
+        );
+        const assetDataHex = ethUtil.bufferToHex(assetDataBuffer);
+        const assetData = assetDataUtils.decodeAssetDataOrThrow(assetDataHex);
+        // Decode auction details
+        const dutchAuctionDetailsBuffer = dutchAuctionDataBuffer.slice(
+            dutchAuctionDataBuffer.byteLength - dutchAuctionDataLengthInBytes,
+        );
+        const [beginTimeSecondsAsBN, beginAmountAsBN] = ethAbi.rawDecode(
+            ['uint256', 'uint256'],
+            dutchAuctionDetailsBuffer,
+        );
+        const beginTimeSeconds = new BigNumber(`0x${beginTimeSecondsAsBN.toString()}`);
+        const beginAmount = new BigNumber(`0x${beginAmountAsBN.toString()}`);
+        return {
+            assetData,
+            beginTimeSeconds,
+            beginAmount,
+        };
+    }
+    /**
+     * Instantiate DutchAuctionWrapper
+     * @param web3Wrapper Web3Wrapper instance to use.
+     * @param networkId Desired networkId.
+     * @param address The address of the Dutch Auction contract. If undefined, will
+     * default to the known address corresponding to the networkId.
+     */
+    public constructor(web3Wrapper: Web3Wrapper, networkId: number, address?: string) {
+        super(web3Wrapper, networkId);
+        this.address = _.isUndefined(address) ? _getDefaultContractAddresses(networkId).dutchAuction : address;
+    }
+    /**
+     * Matches the buy and sell orders at an amount given the following: the current block time, the auction
+     * start time and the auction begin amount. The sell order is a an order at the lowest amount
+     * at the end of the auction. Excess from the match is transferred to the seller.
+     * Over time the price moves from beginAmount to endAmount given the current block.timestamp.
+     * @param buyOrder      The Buyer's order. This order is for the current expected price of the auction.
+     * @param sellOrder     The Seller's order. This order is for the lowest amount (at the end of the auction).
+     * @param takerAddress  The user Ethereum address who would like to fill this order. Must be available via the supplied
+     *                      Provider provided at instantiation.
+     * @return              Transaction hash.
+     */
+    public async matchOrdersAsync(
+        buyOrder: SignedOrder,
+        sellOrder: SignedOrder,
+        takerAddress: string,
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
+    ): Promise<string> {
+        // type assertions
+        assert.doesConformToSchema('buyOrder', buyOrder, schemas.signedOrderSchema);
+        assert.doesConformToSchema('sellOrder', sellOrder, schemas.signedOrderSchema);
+        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
+        assert.doesConformToSchema('orderTransactionOpts', orderTransactionOpts, orderTxOptsSchema, [txOptsSchema]);
+        const normalizedTakerAddress = takerAddress.toLowerCase();
+        // other assertions
+        if (
+            sellOrder.makerAssetData !== buyOrder.takerAssetData ||
+            sellOrder.takerAssetData !== buyOrder.makerAssetData
+        ) {
+            throw new Error(DutchAuctionWrapperError.AssetDataMismatch);
+        }
+        // get contract
+        const dutchAuctionInstance = await this._getDutchAuctionContractAsync();
+        // validate transaction
+        if (orderTransactionOpts.shouldValidate) {
+            await dutchAuctionInstance.matchOrders.callAsync(
+                buyOrder,
+                sellOrder,
+                buyOrder.signature,
+                sellOrder.signature,
+                {
+                    from: normalizedTakerAddress,
+                    gas: orderTransactionOpts.gasLimit,
+                    gasPrice: orderTransactionOpts.gasPrice,
+                    nonce: orderTransactionOpts.nonce,
+                },
+            );
+        }
+        // send transaction
+        const txHash = await dutchAuctionInstance.matchOrders.sendTransactionAsync(
+            buyOrder,
+            sellOrder,
+            buyOrder.signature,
+            sellOrder.signature,
+            {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+                nonce: orderTransactionOpts.nonce,
+            },
+        );
+        return txHash;
+    }
+    /**
+     * Fetches the Auction Details for the given order
+     * @param sellOrder The Seller's order. This order is for the lowest amount (at the end of the auction).
+     * @return The dutch auction details.
+     */
+    public async getAuctionDetailsAsync(sellOrder: SignedOrder): Promise<DutchAuctionDetails> {
+        // type assertions
+        assert.doesConformToSchema('sellOrder', sellOrder, schemas.signedOrderSchema);
+        // get contract
+        const dutchAuctionInstance = await this._getDutchAuctionContractAsync();
+        // call contract
+        const auctionDetails = await dutchAuctionInstance.getAuctionDetails.callAsync(sellOrder);
+        return auctionDetails;
+    }
+    private async _getDutchAuctionContractAsync(): Promise<DutchAuctionContract> {
+        if (!_.isUndefined(this._dutchAuctionContractIfExists)) {
+            return this._dutchAuctionContractIfExists;
+        }
+        const contractInstance = new DutchAuctionContract(
+            this.abi,
+            this.address,
+            this._web3Wrapper.getProvider(),
+            this._web3Wrapper.getContractDefaults(),
+        );
+        this._dutchAuctionContractIfExists = contractInstance;
+        return this._dutchAuctionContractIfExists;
+    }
+}
diff --git a/packages/contract-wrappers/src/index.ts b/packages/contract-wrappers/src/index.ts
index d66ff5c9c..69bbe3c91 100644
--- a/packages/contract-wrappers/src/index.ts
+++ b/packages/contract-wrappers/src/index.ts
@@ -34,6 +34,7 @@ export { ERC20ProxyWrapper } from './contract_wrappers/erc20_proxy_wrapper';
 export { ERC721ProxyWrapper } from './contract_wrappers/erc721_proxy_wrapper';
 export { ForwarderWrapper } from './contract_wrappers/forwarder_wrapper';
 export { OrderValidatorWrapper } from './contract_wrappers/order_validator_wrapper';
+export { DutchAuctionWrapper } from './contract_wrappers/dutch_auction_wrapper';
 
 export { TransactionEncoder } from './utils/transaction_encoder';
 
@@ -54,9 +55,21 @@ export {
     OrderAndTraderInfo,
     TraderInfo,
     ValidateOrderFillableOpts,
+    DutchAuctionData,
 } from './types';
 
-export { Order, SignedOrder, AssetProxyId } from '@0x/types';
+export {
+    AssetData,
+    ERC20AssetData,
+    ERC721AssetData,
+    SingleAssetData,
+    MultiAssetData,
+    MultiAssetDataWithRecursiveDecoding,
+    DutchAuctionDetails,
+    Order,
+    SignedOrder,
+    AssetProxyId,
+} from '@0x/types';
 
 export {
     BlockParamLiteral,
diff --git a/packages/contract-wrappers/src/types.ts b/packages/contract-wrappers/src/types.ts
index 14d4649ae..945ca88cd 100644
--- a/packages/contract-wrappers/src/types.ts
+++ b/packages/contract-wrappers/src/types.ts
@@ -9,7 +9,7 @@ import {
     WETH9Events,
 } from '@0x/abi-gen-wrappers';
 import { ContractAddresses } from '@0x/contract-addresses';
-import { OrderState, SignedOrder } from '@0x/types';
+import { AssetData, OrderState, SignedOrder } from '@0x/types';
 import { BigNumber } from '@0x/utils';
 
 import { BlockParam, ContractEventArg, DecodedLogArgs, LogEntryEvent, LogWithDecodedArgs } from 'ethereum-types';
@@ -206,3 +206,13 @@ export interface BalanceAndAllowance {
     balance: BigNumber;
     allowance: BigNumber;
 }
+
+export enum DutchAuctionWrapperError {
+    AssetDataMismatch = 'ASSET_DATA_MISMATCH',
+}
+
+export interface DutchAuctionData {
+    assetData: AssetData;
+    beginTimeSeconds: BigNumber;
+    beginAmount: BigNumber;
+}
diff --git a/packages/contract-wrappers/test/dutch_auction_wrapper_test.ts b/packages/contract-wrappers/test/dutch_auction_wrapper_test.ts
new file mode 100644
index 000000000..d7a6ca015
--- /dev/null
+++ b/packages/contract-wrappers/test/dutch_auction_wrapper_test.ts
@@ -0,0 +1,128 @@
+import { expectTransactionFailedAsync, getLatestBlockTimestampAsync } from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { assetDataUtils } from '@0x/order-utils';
+import { RevertReason, SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+import 'mocha';
+
+import { ContractWrappers } from '../src';
+
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { DutchAuctionUtils } from './utils/dutch_auction_utils';
+import { migrateOnceAsync } from './utils/migrate';
+import { tokenUtils } from './utils/token_utils';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+// tslint:disable:custom-no-magic-numbers
+describe('DutchAuctionWrapper', () => {
+    const makerAssetAmount = new BigNumber(5);
+    const auctionEndTakerAmount = new BigNumber(10);
+    const auctionBeginTakerAmount = auctionEndTakerAmount.times(2);
+    const tenMinutesInSeconds = 10 * 60;
+    let contractWrappers: ContractWrappers;
+    let exchangeContractAddress: string;
+    let userAddresses: string[];
+    let makerAddress: string;
+    let takerAddress: string;
+    let makerTokenAddress: string;
+    let takerTokenAddress: string;
+    let buyOrder: SignedOrder;
+    let sellOrder: SignedOrder;
+    let makerTokenAssetData: string;
+    let takerTokenAssetData: string;
+    let auctionBeginTimeSeconds: BigNumber;
+    let auctionEndTimeSeconds: BigNumber;
+    before(async () => {
+        // setup contract wrappers & addresses
+        const contractAddresses = await migrateOnceAsync();
+        await blockchainLifecycle.startAsync();
+        const config = {
+            networkId: constants.TESTRPC_NETWORK_ID,
+            contractAddresses,
+            blockPollingIntervalMs: 10,
+        };
+        contractWrappers = new ContractWrappers(provider, config);
+        exchangeContractAddress = contractWrappers.exchange.address;
+        userAddresses = await web3Wrapper.getAvailableAddressesAsync();
+        [, makerAddress, takerAddress] = userAddresses;
+        [makerTokenAddress, takerTokenAddress] = tokenUtils.getDummyERC20TokenAddresses();
+        // construct asset data for tokens being swapped
+        [makerTokenAssetData, takerTokenAssetData] = [
+            assetDataUtils.encodeERC20AssetData(makerTokenAddress),
+            assetDataUtils.encodeERC20AssetData(takerTokenAddress),
+        ];
+        // setup auction details in maker asset data
+        const currentBlockTimestamp: number = await getLatestBlockTimestampAsync();
+        auctionBeginTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds);
+        auctionEndTimeSeconds = new BigNumber(currentBlockTimestamp + tenMinutesInSeconds);
+        // create auction orders
+        const coinbase = userAddresses[0];
+        const dutchAuctionUtils = new DutchAuctionUtils(
+            web3Wrapper,
+            coinbase,
+            exchangeContractAddress,
+            contractWrappers.erc20Proxy.address,
+        );
+        sellOrder = await dutchAuctionUtils.createSignedSellOrderAsync(
+            auctionBeginTimeSeconds,
+            auctionEndTimeSeconds,
+            auctionBeginTakerAmount,
+            auctionEndTakerAmount,
+            makerAssetAmount,
+            makerTokenAssetData,
+            takerTokenAssetData,
+            makerAddress,
+            constants.NULL_ADDRESS,
+        );
+        buyOrder = await dutchAuctionUtils.createSignedBuyOrderAsync(sellOrder, takerAddress);
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('#matchOrdersAsync', () => {
+        it('should match two orders', async () => {
+            const txHash = await contractWrappers.dutchAuction.matchOrdersAsync(buyOrder, sellOrder, takerAddress);
+            await web3Wrapper.awaitTransactionSuccessAsync(txHash, constants.AWAIT_TRANSACTION_MINED_MS);
+        });
+        it('should throw when invalid transaction and shouldValidate is true', async () => {
+            // request match with bad buy/sell orders
+            const badSellOrder = buyOrder;
+            const badBuyOrder = sellOrder;
+            return expectTransactionFailedAsync(
+                contractWrappers.dutchAuction.matchOrdersAsync(badBuyOrder, badSellOrder, takerAddress, {
+                    shouldValidate: true,
+                }),
+                RevertReason.InvalidAssetData,
+            );
+        });
+    });
+
+    describe('#getAuctionDetailsAsync', () => {
+        it('should get auction details', async () => {
+            // get auction details
+            const auctionDetails = await contractWrappers.dutchAuction.getAuctionDetailsAsync(sellOrder);
+            // run some basic sanity checks on the return value
+            expect(auctionDetails.beginTimeSeconds, 'auctionDetails.beginTimeSeconds').to.be.bignumber.equal(
+                auctionBeginTimeSeconds,
+            );
+            expect(auctionDetails.beginAmount, 'auctionDetails.beginAmount').to.be.bignumber.equal(
+                auctionBeginTakerAmount,
+            );
+            expect(auctionDetails.endTimeSeconds, 'auctionDetails.endTimeSeconds').to.be.bignumber.equal(
+                auctionEndTimeSeconds,
+            );
+        });
+    });
+});
diff --git a/packages/contract-wrappers/test/utils/dutch_auction_utils.ts b/packages/contract-wrappers/test/utils/dutch_auction_utils.ts
new file mode 100644
index 000000000..8e2aef217
--- /dev/null
+++ b/packages/contract-wrappers/test/utils/dutch_auction_utils.ts
@@ -0,0 +1,153 @@
+import { DummyERC20TokenContract } from '@0x/abi-gen-wrappers';
+import * as artifacts from '@0x/contract-artifacts';
+import { assetDataUtils } from '@0x/order-utils';
+import { orderFactory } from '@0x/order-utils/lib/src/order_factory';
+import { SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+
+import { DutchAuctionWrapper } from '../../src/contract_wrappers/dutch_auction_wrapper';
+
+import { constants } from './constants';
+
+export class DutchAuctionUtils {
+    private readonly _web3Wrapper: Web3Wrapper;
+    private readonly _coinbase: string;
+    private readonly _exchangeAddress: string;
+    private readonly _erc20ProxyAddress: string;
+
+    constructor(web3Wrapper: Web3Wrapper, coinbase: string, exchangeAddress: string, erc20ProxyAddress: string) {
+        this._web3Wrapper = web3Wrapper;
+        this._coinbase = coinbase;
+        this._exchangeAddress = exchangeAddress;
+        this._erc20ProxyAddress = erc20ProxyAddress;
+    }
+    public async createSignedSellOrderAsync(
+        auctionBeginTimeSections: BigNumber,
+        acutionEndTimeSeconds: BigNumber,
+        auctionBeginTakerAssetAmount: BigNumber,
+        auctionEndTakerAssetAmount: BigNumber,
+        makerAssetAmount: BigNumber,
+        makerAssetData: string,
+        takerAssetData: string,
+        makerAddress: string,
+        takerAddress: string,
+        senderAddress?: string,
+        makerFee?: BigNumber,
+        takerFee?: BigNumber,
+        feeRecipientAddress?: string,
+    ): Promise<SignedOrder> {
+        // Notes on sell order:
+        // - The `takerAssetAmount` is set to the `auctionEndTakerAssetAmount`, which is the lowest amount the
+        //   the seller can expect to receive
+        // - The `makerAssetData` is overloaded to include the auction begin time and begin taker asset amount
+        const makerAssetDataWithAuctionDetails = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+            makerAssetData,
+            auctionBeginTimeSections,
+            auctionBeginTakerAssetAmount,
+        );
+        const signedOrder = await orderFactory.createSignedOrderAsync(
+            this._web3Wrapper.getProvider(),
+            makerAddress,
+            makerAssetAmount,
+            makerAssetDataWithAuctionDetails,
+            auctionEndTakerAssetAmount,
+            takerAssetData,
+            this._exchangeAddress,
+            {
+                takerAddress,
+                senderAddress,
+                makerFee,
+                takerFee,
+                feeRecipientAddress,
+                expirationTimeSeconds: acutionEndTimeSeconds,
+            },
+        );
+        const erc20AssetData = assetDataUtils.decodeERC20AssetData(makerAssetData);
+        await this._increaseERC20BalanceAndAllowanceAsync(erc20AssetData.tokenAddress, makerAddress, makerAssetAmount);
+        return signedOrder;
+    }
+    public async createSignedBuyOrderAsync(
+        sellOrder: SignedOrder,
+        buyerAddress: string,
+        senderAddress?: string,
+        makerFee?: BigNumber,
+        takerFee?: BigNumber,
+        feeRecipientAddress?: string,
+        expirationTimeSeconds?: BigNumber,
+    ): Promise<SignedOrder> {
+        const dutchAuctionData = DutchAuctionWrapper.decodeDutchAuctionData(sellOrder.makerAssetData);
+        // Notes on buy order:
+        // - The `makerAssetAmount` is set to `dutchAuctionData.beginAmount`, which is
+        //   the highest amount the buyer would have to pay out at any point during the auction.
+        // - The `takerAssetAmount` is set to the seller's `makerAssetAmount`, as the buyer
+        //   receives the entire amount being sold by the seller.
+        // - The `makerAssetData`/`takerAssetData` are reversed from the sell order
+        const signedOrder = await orderFactory.createSignedOrderAsync(
+            this._web3Wrapper.getProvider(),
+            buyerAddress,
+            dutchAuctionData.beginAmount,
+            sellOrder.takerAssetData,
+            sellOrder.makerAssetAmount,
+            sellOrder.makerAssetData,
+            sellOrder.exchangeAddress,
+            {
+                senderAddress,
+                makerFee,
+                takerFee,
+                feeRecipientAddress,
+                expirationTimeSeconds,
+            },
+        );
+        const buyerERC20AssetData = assetDataUtils.decodeERC20AssetData(sellOrder.takerAssetData);
+        await this._increaseERC20BalanceAndAllowanceAsync(
+            buyerERC20AssetData.tokenAddress,
+            buyerAddress,
+            dutchAuctionData.beginAmount,
+        );
+        return signedOrder;
+    }
+    private async _increaseERC20BalanceAndAllowanceAsync(
+        tokenAddress: string,
+        address: string,
+        amount: BigNumber,
+    ): Promise<void> {
+        if (amount.isZero() || address === constants.NULL_ADDRESS) {
+            return; // noop
+        }
+        await Promise.all([
+            this._increaseERC20BalanceAsync(tokenAddress, address, amount),
+            this._increaseERC20AllowanceAsync(tokenAddress, address, amount),
+        ]);
+    }
+    private async _increaseERC20BalanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
+        const erc20Token = new DummyERC20TokenContract(
+            artifacts.DummyERC20Token.compilerOutput.abi,
+            tokenAddress,
+            this._web3Wrapper.getProvider(),
+            this._web3Wrapper.getContractDefaults(),
+        );
+        const txHash = await erc20Token.transfer.sendTransactionAsync(address, amount, {
+            from: this._coinbase,
+        });
+        await this._web3Wrapper.awaitTransactionSuccessAsync(txHash, constants.AWAIT_TRANSACTION_MINED_MS);
+    }
+    private async _increaseERC20AllowanceAsync(
+        tokenAddress: string,
+        address: string,
+        amount: BigNumber,
+    ): Promise<void> {
+        const erc20Token = new DummyERC20TokenContract(
+            artifacts.DummyERC20Token.compilerOutput.abi,
+            tokenAddress,
+            this._web3Wrapper.getProvider(),
+            this._web3Wrapper.getContractDefaults(),
+        );
+        const oldMakerAllowance = await erc20Token.allowance.callAsync(address, this._erc20ProxyAddress);
+        const newMakerAllowance = oldMakerAllowance.plus(amount);
+        const txHash = await erc20Token.approve.sendTransactionAsync(this._erc20ProxyAddress, newMakerAllowance, {
+            from: address,
+        });
+        await this._web3Wrapper.awaitTransactionSuccessAsync(txHash, constants.AWAIT_TRANSACTION_MINED_MS);
+    }
+}
diff --git a/packages/migrations/CHANGELOG.json b/packages/migrations/CHANGELOG.json
index e7b18f12b..cee64a69f 100644
--- a/packages/migrations/CHANGELOG.json
+++ b/packages/migrations/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "2.3.0",
+        "changes": [
+            {
+                "note": "Added migrations for Dutch Auction contract",
+                "pr": 1465
+            }
+        ]
+    },
+    {
         "version": "2.2.2",
         "changes": [
             {
diff --git a/packages/migrations/src/migration.ts b/packages/migrations/src/migration.ts
index c684c4970..99d1719f1 100644
--- a/packages/migrations/src/migration.ts
+++ b/packages/migrations/src/migration.ts
@@ -141,6 +141,14 @@ export async function runMigrationsAsync(provider: Provider, txDefaults: Partial
         zrxAssetData,
     );
 
+    // DutchAuction
+    const dutchAuction = await wrappers.DutchAuctionContract.deployFrom0xArtifactAsync(
+        artifacts.DutchAuction,
+        provider,
+        txDefaults,
+        exchange.address,
+    );
+
     // Fund the Forwarder with ZRX
     const zrxDecimals = await zrxToken.decimals.callAsync();
     const zrxForwarderAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(5000), zrxDecimals);
@@ -157,6 +165,7 @@ export async function runMigrationsAsync(provider: Provider, txDefaults: Partial
         assetProxyOwner: assetProxyOwner.address,
         forwarder: forwarder.address,
         orderValidator: orderValidator.address,
+        dutchAuction: dutchAuction.address,
     };
 }
 
diff --git a/packages/monorepo-scripts/CHANGELOG.json b/packages/monorepo-scripts/CHANGELOG.json
index 428168437..cebe7ec72 100644
--- a/packages/monorepo-scripts/CHANGELOG.json
+++ b/packages/monorepo-scripts/CHANGELOG.json
@@ -17,6 +17,10 @@
             {
                 "note": "Fix a bug when hardcoded CHANGELOG paths cause fetching release notes to fail",
                 "pr": 1311
+            },
+            {
+                "note": "Added DutchAuctionWrapper to the CLASSES_WITH_HIDDEN_CONSTRUCTORS array",
+                "pr": 1465
             }
         ]
     },
diff --git a/packages/monorepo-scripts/src/doc_gen_configs.ts b/packages/monorepo-scripts/src/doc_gen_configs.ts
index 7a14f8664..dfbe98028 100644
--- a/packages/monorepo-scripts/src/doc_gen_configs.ts
+++ b/packages/monorepo-scripts/src/doc_gen_configs.ts
@@ -37,6 +37,7 @@ export const docGenConfigs: DocGenConfigs = {
     // and getting confused. Any class name in this list will not have it's constructor rendered in our docs.
     CLASSES_WITH_HIDDEN_CONSTRUCTORS: [
         'AssetBuyer',
+        'DutchAuctionWrapper',
         'ERC20ProxyWrapper',
         'ERC20TokenWrapper',
         'ERC721ProxyWrapper',
diff --git a/packages/types/CHANGELOG.json b/packages/types/CHANGELOG.json
index fdb421e79..7094953cb 100644
--- a/packages/types/CHANGELOG.json
+++ b/packages/types/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "1.5.0",
+        "changes": [
+            {
+                "note": "Added types for Dutch Auction contract",
+                "pr": 1465
+            }
+        ]
+    },
+    {
         "version": "1.4.1",
         "changes": [
             {
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 472b56dc2..49f788fb0 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -676,3 +676,12 @@ export interface SimpleEvmOutput {
 export interface SimpleEvmBytecodeOutput {
     object: string;
 }
+
+export interface DutchAuctionDetails {
+    beginTimeSeconds: BigNumber;
+    endTimeSeconds: BigNumber;
+    beginAmount: BigNumber;
+    endAmount: BigNumber;
+    currentAmount: BigNumber;
+    currentTimeSeconds: BigNumber;
+}