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import { assetProxyUtils, generatePseudoRandomSalt } from '@0xproject/order-utils';
import { BigNumber } from '@0xproject/utils';
import { Web3Wrapper } from '@0xproject/web3-wrapper';
import { Provider } from 'ethereum-types';
import * as _ from 'lodash';
import { DummyERC721TokenContract } from '../generated_contract_wrappers/dummy_e_r_c721_token';
import { ERC721ProxyContract } from '../generated_contract_wrappers/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 _web3Wrapper: Web3Wrapper;
private _provider: Provider;
private _dummyTokenContracts: DummyERC721TokenContract[];
private _proxyContract?: ERC721ProxyContract;
private _proxyIdIfExists?: number;
private _initialTokenIdsByOwner: ERC721TokenIdsByOwner = {};
constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
this._web3Wrapper = new Web3Wrapper(provider);
this._provider = provider;
this._dummyTokenContracts = [];
this._tokenOwnerAddresses = tokenOwnerAddresses;
this._contractOwnerAddress = contractOwnerAddress;
}
public async deployDummyTokensAsync(): Promise<DummyERC721TokenContract[]> {
for (let i = 0; i < constants.NUM_DUMMY_ERC721_TO_DEPLOY; i++) {
this._dummyTokenContracts.push(
await DummyERC721TokenContract.deployFrom0xArtifactAsync(
artifacts.DummyERC721Token,
this._provider,
txDefaults,
constants.DUMMY_TOKEN_NAME,
constants.DUMMY_TOKEN_SYMBOL,
),
);
}
return this._dummyTokenContracts;
}
public async deployProxyAsync(): Promise<ERC721ProxyContract> {
this._proxyContract = await ERC721ProxyContract.deployFrom0xArtifactAsync(
artifacts.ERC721Proxy,
this._provider,
txDefaults,
);
this._proxyIdIfExists = await this._proxyContract.getProxyId.callAsync();
return this._proxyContract;
}
public getProxyId(): number {
this._validateProxyContractExistsOrThrow();
return this._proxyIdIfExists as number;
}
public async setBalancesAndAllowancesAsync(): Promise<void> {
this._validateDummyTokenContractsExistOrThrow();
this._validateProxyContractExistsOrThrow();
this._initialTokenIdsByOwner = {};
for (const dummyTokenContract of this._dummyTokenContracts) {
for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
for (let i = 0; i < constants.NUM_ERC721_TOKENS_TO_MINT; i++) {
const tokenId = generatePseudoRandomSalt();
await this._web3Wrapper.awaitTransactionSuccessAsync(
await dummyTokenContract.mint.sendTransactionAsync(tokenOwnerAddress, tokenId, {
from: this._contractOwnerAddress,
}),
constants.AWAIT_TRANSACTION_MINED_MS,
);
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;
await this._web3Wrapper.awaitTransactionSuccessAsync(
await dummyTokenContract.setApprovalForAll.sendTransactionAsync(
(this._proxyContract as ERC721ProxyContract).address,
shouldApprove,
{ from: tokenOwnerAddress },
),
constants.AWAIT_TRANSACTION_MINED_MS,
);
}
}
}
public async getBalanceAsync(owner: string, assetData: string): Promise<BigNumber> {
const erc721ProxyData = assetProxyUtils.decodeERC721AssetData(assetData);
const tokenAddress = erc721ProxyData.tokenAddress;
const tokenContractIfExists = _.find(this._dummyTokenContracts, c => c.address === tokenAddress);
if (_.isUndefined(tokenContractIfExists)) {
throw new Error(`Token: ${tokenAddress} was not deployed through ERC20Wrapper`);
}
const tokenId = erc721ProxyData.tokenId;
const tokenOwner = await tokenContractIfExists.ownerOf.callAsync(tokenId);
const balance = tokenOwner === owner ? new BigNumber(1) : new BigNumber(0);
return balance;
}
public async getProxyAllowanceAsync(owner: string, assetData: string): Promise<BigNumber> {
const erc721ProxyData = assetProxyUtils.decodeERC721AssetData(assetData);
const tokenAddress = erc721ProxyData.tokenAddress;
this._validateProxyContractExistsOrThrow();
const tokenContractIfExists = _.find(this._dummyTokenContracts, c => c.address === tokenAddress);
if (_.isUndefined(tokenContractIfExists)) {
throw new Error(`Token: ${tokenAddress} was not deployed through ERC20Wrapper`);
}
const operator = (this._proxyContract as ERC721ProxyContract).address;
const didApproveAll = await tokenContractIfExists.isApprovedForAll.callAsync(owner, operator);
const tokenId = erc721ProxyData.tokenId;
const allowedAddress = await tokenContractIfExists.getApproved.callAsync(tokenId);
const allowance = allowedAddress === operator || didApproveAll ? new BigNumber(1) : new BigNumber(0);
return allowance;
}
public async getBalancesAsync(): Promise<ERC721TokenIdsByOwner> {
this._validateDummyTokenContractsExistOrThrow();
this._validateBalancesAndAllowancesSetOrThrow();
const tokenIdsByOwner: ERC721TokenIdsByOwner = {};
const tokenOwnerAddresses: string[] = [];
const tokenInfo: Array<{ tokenId: BigNumber; tokenAddress: string }> = [];
for (const dummyTokenContract of this._dummyTokenContracts) {
for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
const initialTokenOwnerIds = this._initialTokenIdsByOwner[tokenOwnerAddress][
dummyTokenContract.address
];
for (const tokenId of initialTokenOwnerIds) {
tokenOwnerAddresses.push(await dummyTokenContract.ownerOf.callAsync(tokenId));
tokenInfo.push({
tokenId,
tokenAddress: dummyTokenContract.address,
});
}
}
}
_.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"',
);
}
}
}
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