diff options
Diffstat (limited to 'packages/contract-wrappers/src')
| -rw-r--r-- | packages/contract-wrappers/src/contract_wrappers.ts | 10 | ||||
| -rw-r--r-- | packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts | 182 | ||||
| -rw-r--r-- | packages/contract-wrappers/src/index.ts | 15 | ||||
| -rw-r--r-- | packages/contract-wrappers/src/types.ts | 12 |
4 files changed, 217 insertions, 2 deletions
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; +} |