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import { Web3Wrapper } from '@0xproject/web3-wrapper';
import { ContractAbi } from 'ethereum-types';
import * as _ from 'lodash';
import { artifacts } from '../artifacts';
import { assert } from '../utils/assert';
import { ContractWrapper } from './contract_wrapper';
import { ERC20ProxyContract } from './generated/erc20_proxy';
/**
* This class includes the functionality related to interacting with the ERC20Proxy contract.
*/
export class ERC20ProxyWrapper extends ContractWrapper {
public abi: ContractAbi = artifacts.ERC20Proxy.compilerOutput.abi;
private _erc20ProxyContractIfExists?: ERC20ProxyContract;
private _contractAddressIfExists?: string;
constructor(web3Wrapper: Web3Wrapper, networkId: number, contractAddressIfExists?: string) {
super(web3Wrapper, networkId);
this._contractAddressIfExists = contractAddressIfExists;
}
/**
* Get the 4 bytes ID of this asset proxy
* @return Proxy id
*/
public async getProxyIdAsync(): Promise<string> {
const ERC20ProxyContractInstance = await this._getERC20ProxyContractAsync();
const proxyId = await ERC20ProxyContractInstance.getProxyId.callAsync();
return proxyId;
}
/**
* Check if the Exchange contract address is authorized by the ERC20Proxy contract.
* @param exchangeContractAddress The hex encoded address of the Exchange contract to call.
* @return Whether the exchangeContractAddress is authorized.
*/
public async isAuthorizedAsync(exchangeContractAddress: string): Promise<boolean> {
assert.isETHAddressHex('exchangeContractAddress', exchangeContractAddress);
const normalizedExchangeContractAddress = exchangeContractAddress.toLowerCase();
const ERC20ProxyContractInstance = await this._getERC20ProxyContractAsync();
const isAuthorized = await ERC20ProxyContractInstance.authorized.callAsync(normalizedExchangeContractAddress);
return isAuthorized;
}
/**
* Get the list of all Exchange contract addresses authorized by the ERC20Proxy contract.
* @return The list of authorized addresses.
*/
public async getAuthorizedAddressesAsync(): Promise<string[]> {
const ERC20ProxyContractInstance = await this._getERC20ProxyContractAsync();
const authorizedAddresses = await ERC20ProxyContractInstance.getAuthorizedAddresses.callAsync();
return authorizedAddresses;
}
/**
* Retrieves the Ethereum address of the ERC20Proxy contract deployed on the network
* that the user-passed web3 provider is connected to.
* @returns The Ethereum address of the ERC20Proxy contract being used.
*/
public getContractAddress(): string {
const contractAddress = this._getContractAddress(artifacts.ERC20Proxy, this._contractAddressIfExists);
return contractAddress;
}
// HACK: We don't want this method to be visible to the other units within that package but not to the end user.
// TS doesn't give that possibility and therefore we make it private and access it over an any cast. Because of that tslint sees it as unused.
// tslint:disable-next-line:no-unused-variable
private _invalidateContractInstance(): void {
delete this._erc20ProxyContractIfExists;
}
private async _getERC20ProxyContractAsync(): Promise<ERC20ProxyContract> {
if (!_.isUndefined(this._erc20ProxyContractIfExists)) {
return this._erc20ProxyContractIfExists;
}
const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
artifacts.ERC20Proxy,
this._contractAddressIfExists,
);
const contractInstance = new ERC20ProxyContract(
abi,
address,
this._web3Wrapper.getProvider(),
this._web3Wrapper.getContractDefaults(),
);
this._erc20ProxyContractIfExists = contractInstance;
return this._erc20ProxyContractIfExists;
}
}
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