78 lines
3.5 KiB
TypeScript
78 lines
3.5 KiB
TypeScript
import { ERC20ProxyContract } from '@0x/abi-gen-wrappers';
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import { ERC20Proxy } from '@0x/contract-artifacts';
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import { AssetProxyId } from '@0x/types';
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import { Web3Wrapper } from '@0x/web3-wrapper';
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import { ContractAbi } from 'ethereum-types';
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import * as _ from 'lodash';
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import { assert } from '../utils/assert';
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import { _getDefaultContractAddresses } from '../utils/contract_addresses';
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import { ContractWrapper } from './contract_wrapper';
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/**
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* This class includes the functionality related to interacting with the ERC20Proxy contract.
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*/
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export class ERC20ProxyWrapper extends ContractWrapper {
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public abi: ContractAbi = ERC20Proxy.compilerOutput.abi;
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public address: string;
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private _erc20ProxyContractIfExists?: ERC20ProxyContract;
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/**
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* Instantiate ERC20ProxyWrapper
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* @param web3Wrapper Web3Wrapper instance to use
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* @param networkId Desired networkId
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* @param address The address of the ERC20Proxy contract. If undefined, will
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* default to the known address corresponding to the networkId.
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*/
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constructor(web3Wrapper: Web3Wrapper, networkId: number, address?: string) {
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super(web3Wrapper, networkId);
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this.address = _.isUndefined(address) ? _getDefaultContractAddresses(networkId).erc20Proxy : address;
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}
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/**
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* Get the 4 bytes ID of this asset proxy
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* @return Proxy id
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*/
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public async getProxyIdAsync(): Promise<AssetProxyId> {
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const ERC20ProxyContractInstance = this._getERC20ProxyContract();
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// Note(albrow): Below is a TSLint false positive. Code won't compile if
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// you remove the type assertion.
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/* tslint:disable-next-line:no-unnecessary-type-assertion */
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const proxyId = (await ERC20ProxyContractInstance.getProxyId.callAsync()) as AssetProxyId;
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return proxyId;
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}
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/**
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* Check if the Exchange contract address is authorized by the ERC20Proxy contract.
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* @param exchangeContractAddress The hex encoded address of the Exchange contract to call.
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* @return Whether the exchangeContractAddress is authorized.
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*/
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public async isAuthorizedAsync(exchangeContractAddress: string): Promise<boolean> {
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assert.isETHAddressHex('exchangeContractAddress', exchangeContractAddress);
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const normalizedExchangeContractAddress = exchangeContractAddress.toLowerCase();
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const ERC20ProxyContractInstance = this._getERC20ProxyContract();
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const isAuthorized = await ERC20ProxyContractInstance.authorized.callAsync(normalizedExchangeContractAddress);
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return isAuthorized;
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}
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/**
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* Get the list of all Exchange contract addresses authorized by the ERC20Proxy contract.
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* @return The list of authorized addresses.
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*/
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public async getAuthorizedAddressesAsync(): Promise<string[]> {
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const ERC20ProxyContractInstance = this._getERC20ProxyContract();
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const authorizedAddresses = await ERC20ProxyContractInstance.getAuthorizedAddresses.callAsync();
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return authorizedAddresses;
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}
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private _getERC20ProxyContract(): ERC20ProxyContract {
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if (!_.isUndefined(this._erc20ProxyContractIfExists)) {
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return this._erc20ProxyContractIfExists;
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}
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const contractInstance = new ERC20ProxyContract(
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this.abi,
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this.address,
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this._web3Wrapper.getProvider(),
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this._web3Wrapper.getContractDefaults(),
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);
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this._erc20ProxyContractIfExists = contractInstance;
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return this._erc20ProxyContractIfExists;
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}
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}
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