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import * as _ from 'lodash';
import {artifacts} from '../artifacts';
import {TokenTransferProxyContract, ZeroExError} from '../types';
import {Web3Wrapper} from '../web3_wrapper';
import {ContractWrapper} from './contract_wrapper';
/**
* This class includes the functionality related to interacting with the TokenTransferProxy contract.
*/
export class TokenTransferProxyWrapper extends ContractWrapper {
private _tokenTransferProxyContractIfExists?: TokenTransferProxyContract;
private _contractAddressIfExists?: string;
constructor(web3Wrapper: Web3Wrapper, contractAddressIfExists?: string) {
super(web3Wrapper);
this._contractAddressIfExists = contractAddressIfExists;
}
/**
* Check if the Exchange contract address is authorized by the TokenTransferProxy 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> {
const tokenTransferProxyContractInstance = await this._getTokenTransferProxyContractAsync();
const isAuthorized = await tokenTransferProxyContractInstance.authorized.callAsync(exchangeContractAddress);
return isAuthorized;
}
/**
* Get the list of all Exchange contract addresses authorized by the TokenTransferProxy contract.
* @return The list of authorized addresses.
*/
public async getAuthorizedAddressesAsync(): Promise<string[]> {
const tokenTransferProxyContractInstance = await this._getTokenTransferProxyContractAsync();
const authorizedAddresses = await tokenTransferProxyContractInstance.getAuthorizedAddresses.callAsync();
return authorizedAddresses;
}
/**
* Retrieves the Ethereum address of the TokenTransferProxy contract deployed on the network
* that the user-passed web3 provider is connected to.
* @returns The Ethereum address of the TokenTransferProxy contract being used.
*/
public getContractAddress(): string {
const networkId = this._web3Wrapper.getNetworkId();
if (_.isUndefined(this._contractAddressIfExists)) {
const contractAddress = artifacts.TokenTransferProxyArtifact.networks[networkId].address;
if (_.isUndefined(contractAddress)) {
throw new Error(ZeroExError.ExchangeContractDoesNotExist);
}
return contractAddress;
} else {
return this._contractAddressIfExists;
}
}
private _invalidateContractInstance(): void {
delete this._tokenTransferProxyContractIfExists;
}
private async _getTokenTransferProxyContractAsync(): Promise<TokenTransferProxyContract> {
if (!_.isUndefined(this._tokenTransferProxyContractIfExists)) {
return this._tokenTransferProxyContractIfExists;
}
const contractInstance = await this._instantiateContractIfExistsAsync<TokenTransferProxyContract>(
artifacts.TokenTransferProxyArtifact, this._contractAddressIfExists,
);
this._tokenTransferProxyContractIfExists = contractInstance;
return this._tokenTransferProxyContractIfExists;
}
}
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