bug: Missing BASE Chain ID in SAFE_TRANSACTION_SERVICE_URL Mapping

[vnaysngh]

The TypeScript error occurs because SAFE_TRANSACTION_SERVICE_URL is defined as a Record<SupportedChainId, string>, but it does not include an entry for SupportedChainId.BASE. The SupportedChainId enum from @cowprotocol/cow-sdk likely includes BASE, making its presence mandatory in the Record.

Steps to reproduce:
The compiler throws an error right after you build the CRA example app.

Expected Behavior:

The mapping should include an entry for SupportedChainId.BASE to satisfy the Record<SupportedChainId, string> type requirement.

Suggested Fix:

Add an entry for SupportedChainId.BASE in SAFE_TRANSACTION_SERVICE_URL, specifying the correct transaction service URL for Base network:

[SupportedChainId.BASE]: 'https://safe-transaction-base.safe.global'

cow-sdk/examples/cra/src/pages/smartContractWallet/const.ts

Line 8 in bb8acf2

export const SAFE_TRANSACTION_SERVICE_URL: Record<SupportedChainId, string> = {