fix: handle widgetCustomTokens parameter - #7999
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WalkthroughThe change adds shared HTTP/HTTPS URL validation for safe links. It excludes virtual-list sources from token-list URLs. It merges chain-matching virtual-list tokens with user-added tokens, removes duplicates, and sorts the result. ChangesHTTP URL validation
Virtual-list token aggregation
Estimated code review effort: 3 (Moderate) | ~20 minutes Mergeability Score: 🔵 Low · up to The change prevents the internal widgetCustomTokens key from being sent as a URL and tracks those tokens separately for balance requests. The remaining bounded risk is that the non-HTTP source tests omit the IPNS variant, so a follow-up test is warranted; the PR is otherwise mergeable with owner awareness. Possibly related PRs
Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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…l/cowswap into fix/filter-widgetCustomTokens
limitofzero
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Actionable comments posted: 1
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Verify each finding against current code. Fix only still-valid issues, skip the
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Inline comments:
In `@libs/balances-and-allowances/src/hooks/useCustomTokensForChain.ts`:
- Around line 16-34: Sort the merged address keys before returning them from the
useCustomTokensForChain memo, while preserving EMPTY_CUSTOM_TOKENS for an empty
set; update libs/balances-and-allowances/src/hooks/useCustomTokensForChain.ts
lines 16-34 accordingly. Update
libs/balances-and-allowances/src/hooks/useCustomTokensForChain.test.tsx lines
86-98 to expect deterministic sorted key order and retain coverage of the merged
result.
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📒 Files selected for processing (8)
apps/cow-fi/util/markdownHtmlImages.tsapps/cowswap-frontend/src/modules/notifications/utils/getTrustedNotificationLink.tslibs/balances-and-allowances/src/hooks/useCustomTokensForChain.test.tsxlibs/balances-and-allowances/src/hooks/useCustomTokensForChain.tslibs/balances-and-allowances/src/hooks/useEnabledTokensListsUrls.test.tslibs/balances-and-allowances/src/hooks/useEnabledTokensListsUrls.tslibs/common-utils/package.jsonlibs/common-utils/src/safeLink.ts
| () => | ||
| Object.entries(enabledState) | ||
| .filter(([, enabled]) => enabled === true) | ||
| .filter(([source, enabled]) => enabled === true && isHttpUrl(source)) |
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Are you sure about that? It looks like lists with non-http source become always disabled
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thank you, replace by filtering all virtualList sources
| "require": "./src/json-utils.ts", | ||
| "default": "./src/json-utils.ts" | ||
| }, | ||
| "./safeLink": { |
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Great solution!
I think we should do that more often to control bundles better
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Actionable comments posted: 1
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Inline comments:
In `@libs/balances-and-allowances/src/hooks/useEnabledTokensListsUrls.test.ts`:
- Around line 65-74: Update the test case in useEnabledTokensListsUrls to
include an ipns:// source in mockEnabledState and assert that it appears in
result.current alongside the existing IPFS and ENS entries, keeping the test
name accurate.
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libs/balances-and-allowances/src/hooks/useEnabledTokensListsUrls.test.tslibs/balances-and-allowances/src/hooks/useEnabledTokensListsUrls.ts
3 participants
Summary
Fixes a Sentry error:
BalancesWatcherApiError: "Bad request: Token list url not allowed: widgetCustomTokens (invalid url: relative URL without a base)", link.linear issue
Widget integrators can pass a
customTokensparam (a rawTokenInfo[]array), which is stored internally as a virtual token list keyed by the literal stringwidgetCustomTokens. That key was leaking intotokensListsUrlssent to the BalancesWatcher session POST — it isn't a real URL, so the API rejected the whole session.To Test
widget-configuratorpreview deployment for this PR.cowswap-frontendpreview (label "Preview"). If it doesn't auto-resolve, override it vialocalStorage.setItem('WIDGET_BASE_URL', '<this PR's cowswap-frontend preview URL>')and refresh.customTokensparam (a rawTokenInfo[]array, NOT a token list URL — this is what creates thewidgetCustomTokensvirtual list). Easiest way: open the Advanced section in the sidebar and paste into Raw JSON params:{ "customTokens": [ { "chainId": 1, "address": "0x69D29F1b0cC37d8d3B61583c99Ad0ab926142069", "name": "test", "decimals": 9, "symbol": "TEST" } ] }sessions(hostbalances-watcher.barn.cow.fi)./{chainId}/sessions/{account}succeeds (not a 400).tokensListsUrlsarray does not contain"widgetCustomTokens".customTokensarray does contain the custom token's address (lowercased/checksummed pergetAddressKey).Background
widgetCustomTokensis a fixed key used internally to represent widget-integrator-provided custom tokens as a "virtual" token list (seeWidgetVirtualListUpdater). It's always enabled and merged into token list state, but it isn't a fetchable URL — it was never meant to reach the BalancesWatcher session request'stokensListsUrlsfield, which only accepts real list URLs. Its tokens are now tracked the same way user-imported custom tokens are: by address, via the session'scustomTokensfield.Summary by CodeRabbit