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import { Web3Wrapper } from '@0xproject/web3-wrapper';
import * as _ from 'lodash';
import { artifacts } from '../artifacts';
import { assert } from '../utils/assert';
import { ContractWrapper } from './contract_wrapper';
import { TokenTransferProxyContract } from './generated/token_transfer_proxy';
/**
* 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, networkId: number, contractAddressIfExists?: string) {
super(web3Wrapper, networkId);
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 normalizedExchangeContractAddress = exchangeContractAddress.toLowerCase();
assert.isETHAddressHex('exchangeContractAddress', normalizedExchangeContractAddress);
const tokenTransferProxyContractInstance = await this._getTokenTransferProxyContractAsync();
const isAuthorized = await tokenTransferProxyContractInstance.authorized.callAsync(
normalizedExchangeContractAddress,
);
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 contractAddress = this._getContractAddress(
artifacts.TokenTransferProxyArtifact,
this._contractAddressIfExists,
);
return contractAddress;
}
private _invalidateContractInstance(): void {
delete this._tokenTransferProxyContractIfExists;
}
private async _getTokenTransferProxyContractAsync(): Promise<TokenTransferProxyContract> {
if (!_.isUndefined(this._tokenTransferProxyContractIfExists)) {
return this._tokenTransferProxyContractIfExists;
}
const web3ContractInstance = await this._instantiateContractIfExistsAsync(
artifacts.TokenTransferProxyArtifact,
this._contractAddressIfExists,
);
const contractInstance = new TokenTransferProxyContract(
web3ContractInstance,
this._web3Wrapper.getContractDefaults(),
);
this._tokenTransferProxyContractIfExists = contractInstance;
return this._tokenTransferProxyContractIfExists;
}
}
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