import { ZeroEx } from '0x.js'; import { Provider } from '@0xproject/types'; import { BigNumber } from '@0xproject/utils'; import * as _ from 'lodash'; import { DummyERC721TokenContract } from '../contract_wrappers/generated/dummy_e_r_c721_token'; import { ERC721ProxyContract } from '../contract_wrappers/generated/e_r_c721_proxy'; import { artifacts } from './artifacts'; import { constants } from './constants'; import { ERC721TokenIdsByOwner } from './types'; import { txDefaults } from './web3_wrapper'; export class ERC721Wrapper { private _tokenOwnerAddresses: string[]; private _contractOwnerAddress: string; private _provider: Provider; private _dummyTokenContracts?: DummyERC721TokenContract[]; private _proxyContract?: ERC721ProxyContract; private _initialTokenIdsByOwner: ERC721TokenIdsByOwner = {}; constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) { this._provider = provider; this._tokenOwnerAddresses = tokenOwnerAddresses; this._contractOwnerAddress = contractOwnerAddress; } public async deployDummyTokensAsync(): Promise { this._dummyTokenContracts = await Promise.all( _.times(constants.NUM_DUMMY_ERC721_TO_DEPLOY, async () => DummyERC721TokenContract.deployFrom0xArtifactAsync( artifacts.DummyERC721Token, this._provider, txDefaults, constants.DUMMY_TOKEN_NAME, constants.DUMMY_TOKEN_SYMBOL, ), ), ); return this._dummyTokenContracts; } public async deployProxyAsync(): Promise { this._proxyContract = await ERC721ProxyContract.deployFrom0xArtifactAsync( artifacts.ERC721Proxy, this._provider, txDefaults, ); return this._proxyContract; } public async setBalancesAndAllowancesAsync(): Promise { this._validateDummyTokenContractsExistOrThrow(); this._validateProxyContractExistsOrThrow(); const setBalancePromises: Array> = []; const setAllowancePromises: Array> = []; this._initialTokenIdsByOwner = {}; _.forEach(this._dummyTokenContracts, dummyTokenContract => { _.forEach(this._tokenOwnerAddresses, tokenOwnerAddress => { _.forEach(_.range(constants.NUM_ERC721_TOKENS_TO_MINT), () => { const tokenId = ZeroEx.generatePseudoRandomSalt(); setBalancePromises.push( dummyTokenContract.mint.sendTransactionAsync(tokenOwnerAddress, tokenId, { from: this._contractOwnerAddress, }), ); if (_.isUndefined(this._initialTokenIdsByOwner[tokenOwnerAddress])) { this._initialTokenIdsByOwner[tokenOwnerAddress] = { [dummyTokenContract.address]: [], }; } if (_.isUndefined(this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address])) { this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address] = []; } this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address].push(tokenId); }); const shouldApprove = true; setAllowancePromises.push( dummyTokenContract.setApprovalForAll.sendTransactionAsync( (this._proxyContract as ERC721ProxyContract).address, shouldApprove, { from: tokenOwnerAddress }, ), ); }); }); await Promise.all([...setBalancePromises, ...setAllowancePromises]); } public async getBalancesAsync(): Promise { this._validateDummyTokenContractsExistOrThrow(); this._validateBalancesAndAllowancesSetOrThrow(); const tokenIdsByOwner: ERC721TokenIdsByOwner = {}; const tokenOwnerPromises: Array> = []; const tokenInfo: Array<{ tokenId: BigNumber; tokenAddress: string }> = []; _.forEach(this._dummyTokenContracts, dummyTokenContract => { _.forEach(this._tokenOwnerAddresses, tokenOwnerAddress => { const initialTokenOwnerIds = this._initialTokenIdsByOwner[tokenOwnerAddress][ dummyTokenContract.address ]; _.forEach(initialTokenOwnerIds, tokenId => { tokenOwnerPromises.push(dummyTokenContract.ownerOf.callAsync(tokenId)); tokenInfo.push({ tokenId, tokenAddress: dummyTokenContract.address, }); }); }); }); const tokenOwnerAddresses = await Promise.all(tokenOwnerPromises); _.forEach(tokenOwnerAddresses, (tokenOwnerAddress, ownerIndex) => { const tokenAddress = tokenInfo[ownerIndex].tokenAddress; const tokenId = tokenInfo[ownerIndex].tokenId; if (_.isUndefined(tokenIdsByOwner[tokenOwnerAddress])) { tokenIdsByOwner[tokenOwnerAddress] = { [tokenAddress]: [], }; } if (_.isUndefined(tokenIdsByOwner[tokenOwnerAddress][tokenAddress])) { tokenIdsByOwner[tokenOwnerAddress][tokenAddress] = []; } tokenIdsByOwner[tokenOwnerAddress][tokenAddress].push(tokenId); }); return tokenIdsByOwner; } public getTokenOwnerAddresses(): string[] { return this._tokenOwnerAddresses; } public getTokenAddresses(): string[] { const tokenAddresses = _.map(this._dummyTokenContracts, dummyTokenContract => dummyTokenContract.address); return tokenAddresses; } private _validateDummyTokenContractsExistOrThrow(): void { if (_.isUndefined(this._dummyTokenContracts)) { throw new Error('Dummy ERC721 tokens not yet deployed, please call "deployDummyTokensAsync"'); } } private _validateProxyContractExistsOrThrow(): void { if (_.isUndefined(this._proxyContract)) { throw new Error('ERC721 proxy contract not yet deployed, please call "deployProxyAsync"'); } } private _validateBalancesAndAllowancesSetOrThrow(): void { if (_.keys(this._initialTokenIdsByOwner).length === 0) { throw new Error( 'Dummy ERC721 balances and allowances not yet set, please call "setBalancesAndAllowancesAsync"', ); } } }