packages/contract-wrappers/src/utils/contract_addresses.ts


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import { ContractAddresses, getContractAddressesForNetwork, NetworkId } from '@0xproject/contract-addresses';
import * as _ from 'lodash';

/**
 * Returns the default contract addresses for the given networkId or throws with
 * a context-specific error message if the networkId is not recognized.
 */
export function _getDefaultContractAddresses(networkId: number): ContractAddresses {
    if (!(networkId in NetworkId)) {
        throw new Error(
            `No default contract addresses found for the given network id (${networkId}). If you want to use ContractWrappers on this network, you must manually pass in the contract address(es) to the constructor.`,
        );
    }
    return getContractAddressesForNetwork(networkId);
}