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-rw-r--r--packages/contract-wrappers/CHANGELOG.json9
-rw-r--r--packages/contract-wrappers/package.json2
-rw-r--r--packages/contract-wrappers/src/contract_wrappers.ts10
-rw-r--r--packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts182
-rw-r--r--packages/contract-wrappers/src/index.ts15
-rw-r--r--packages/contract-wrappers/src/types.ts12
-rw-r--r--packages/contract-wrappers/test/dutch_auction_wrapper_test.ts128
-rw-r--r--packages/contract-wrappers/test/utils/dutch_auction_utils.ts153
8 files changed, 509 insertions, 2 deletions
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);
+ }
+}
generated by cgit (git 2.34.1) at 2024-11-20 19:58:02 +0800