Auction - ETHEREUM:undefined

[vsthakur1quytech]

` const ethCurrency: EthErc20AssetType = {
"@type": "ERC20",
contract: toContractAddress(
"ETHEREUM:0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6"
),
};

const price: number = Number(bid);
const amount: number = 1;

const orderRequest: PrepareOrderRequest = {
itemId: toItemId(tokenUnionAddress),
};

const bidResponse = await sdk?.order.bid(orderRequest);

const response = await bidResponse?.submit({
amount,
price,
currency: ethCurrency,
});`

Can anyone let me know what contract address I can use for goerli testnet and mumbai testnet since I am getting "ETHEREUM:undefined" issue.

Earlier I was working with RINKEBY TESTNET so I have used above addres but now I have switched to GOERLI testnet so what address can I use.