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📝 WalkthroughWalkthroughAdds token-aware gasless fee validation and a Gasless Fee Estimate UI to the TopUp flow; increases TopUp-related gas consumption constants in the gasless service. (49 words) Changes
Sequence Diagram(s)sequenceDiagram
autonumber
participant User as User
participant UI as TopUpScreen
participant GasSvc as GaslessService
participant Validator as validateGaslessFeeBalance
participant Panel as FeeEstimatePanel
User->>UI: open TopUp
UI->>GasSvc: request gas estimate (fetch chain gas price)
GasSvc-->>UI: return gasUnits + tokenConversion (estimated gas cost)
UI->>Validator: validateGaslessFeeBalance(topupAmount, feeToken, balances, gasEstimate)
alt feeToken == topUpToken
Validator->>Validator: totalNeeded = topupAmount + gasCostInToken
Validator->>Validator: check balance >= totalNeeded
else
Validator->>Validator: compute gasCostInToken
Validator->>Validator: check feeTokenBalance >= gasCostInToken
end
Validator-->>UI: validation result (ok / error + message)
alt ok
UI->>Panel: render estimated gas, total needed, current balance
Panel-->>User: display estimates
User->>UI: confirm -> proceed (approval/data generation)
else
UI-->>User: show error (prevent progression)
end
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Actionable comments posted: 1
🧹 Nitpick comments (2)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (2)
420-430: Helpful debug logging for fee estimation.The detailed logging will aid in debugging gasless fee calculations. Consider gating this behind a debug flag or environment variable in production to reduce console noise.
432-465: Duplicated balance validation logic.This validation logic (lines 432-465) is duplicated in
validateGaslessFeeBalance(lines 619-661). Consider extracting the shared calculation into a helper function to ensure consistency and reduce maintenance burden.🔎 Proposed refactor: Extract shared calculation
+// Helper to calculate balance requirements for gasless transactions +const calculateGaslessBalanceRequirements = ( + userBalance: number, + tokenPrice: number, + topUpAmountUSD: number, + estimatedGasInToken: number, + isFeeSameAsToken: boolean +) => { + const topUpAmountInTokens = tokenPrice > 0 ? topUpAmountUSD / tokenPrice : 0; + const availableBalanceForFee = isFeeSameAsToken + ? userBalance - topUpAmountInTokens + : userBalance; + const totalNeededInTokens = topUpAmountInTokens + estimatedGasInToken; + const hasSufficientBalance = availableBalanceForFee >= estimatedGasInToken; + + return { topUpAmountInTokens, availableBalanceForFee, totalNeededInTokens, hasSufficientBalance }; +};Then use this helper in both
generateApprovalDataandvalidateGaslessFeeBalance.
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src/apps/pulse/components/Onboarding/TopUpScreen.tsxsrc/services/gasless.ts
🧰 Additional context used
🧠 Learnings (2)
📚 Learning: 2025-08-12T07:42:24.656Z
Learnt from: IAmKio
Repo: pillarwallet/x PR: 351
File: src/apps/pulse/utils/intent.ts:44-53
Timestamp: 2025-08-12T07:42:24.656Z
Learning: In the Pulse app's intent utilities (src/apps/pulse/utils/intent.ts), the team has chosen to use floating-point arithmetic for token amount calculations despite potential precision issues, accepting JavaScript's decimal place limitations as a valid trade-off for their use case.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
📚 Learning: 2025-09-09T12:40:15.629Z
Learnt from: RanaBug
Repo: pillarwallet/x PR: 391
File: src/apps/pulse/components/Sell/Sell.tsx:113-130
Timestamp: 2025-09-09T12:40:15.629Z
Learning: In the Pulse app Sell component, when a user changes/switches tokens, the input amount automatically resets to 0, which means liquidity validation state doesn't become stale when tokens change.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (4)
- GitHub Check: unit-tests
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🔇 Additional comments (3)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (2)
614-661: Well-documented validation function with clear logic.The JSDoc comment clearly explains the validation formula. The function correctly handles both scenarios: when fee token matches topup token and when they differ.
Note: The function has a side effect (calling
setError) while returning a boolean. This is acceptable for the current use case but could be refactored for better testability by returning an error message ornullinstead.
698-701: Correct integration of gasless balance validation.The validation is properly placed before navigating to preview, preventing users from proceeding with insufficient balance.
src/services/gasless.ts (1)
22-27: The gas consumption values are internally consistent and well-documented. All Arbitrum variants correctly maintain the +200,000 gas offset from their mainnet counterparts:
topup_install_modules_arb(810,000) =topup_install_modules(610,000) + 200,000 ✓topup_deposit_arb(810,000) =topup_deposit(610,000) + 200,000 ✓topup_swap_arb(1,810,000) =topup_swap(1,610,000) + 200,000 ✓The comment on line 23 accurately reflects the calculation. All constants are properly used throughout the codebase in the
calculateTopUpGasCostfunction without conflicts.
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Actionable comments posted: 0
♻️ Duplicate comments (2)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (2)
1016-1020: Unit mismatch: adding USD amount to token amount.
amountis in USD whileestimatedGasCostInTokenis in token units. This works coincidentally for USDC (≈$1) but would be incorrect for non-stablecoin tokens if gasless support is extended.The validation logic in
validateGaslessFeeBalancecorrectly converts USD to token units—apply the same conversion here for consistency.
1026-1028: Balance comparison uses same unit mismatch.The balance check adds
parseFloat(amount)(USD) toparseFloat(estimatedGasCostInToken)(token units). Convertamountto token units usingtokenPriceas done invalidateGaslessFeeBalance.
🧹 Nitpick comments (2)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (2)
604-652: Duplicated validation logic withgenerateApprovalData.The logic in
validateGaslessFeeBalance(lines 609-649) duplicates the balance validation ingenerateApprovalData(lines 420-454):
- USD to token conversion
- Fee token same-as-topup check
- Available balance calculation
- Error message construction
This duplication creates maintenance risk if one is updated but not the other.
🔎 Suggested refactor: Extract shared validation helper
+interface GaslessFeeValidation { + topUpAmountInTokens: number; + availableBalanceForFee: number; + estimatedGasInToken: number; + isFeeSameAsToken: boolean; + isValid: boolean; +} + +const calculateGaslessFeeRequirements = ( + amount: string, + selectedFeeAsset: FeeAsset, + selectedTokenAddress: string, + estimatedGasCostInToken: string +): GaslessFeeValidation => { + const userBalance = selectedFeeAsset.balance ?? 0; + const tokenPrice = parseFloat(selectedFeeAsset.tokenPrice || '0') || 1; + const estimatedGasInToken = parseFloat(estimatedGasCostInToken); + const topUpAmountUSD = parseFloat(amount) || 0; + const topUpAmountInTokens = tokenPrice > 0 ? topUpAmountUSD / tokenPrice : 0; + + const isFeeSameAsToken = + selectedFeeAsset.asset.contract.toLowerCase() === + selectedTokenAddress.toLowerCase(); + + const availableBalanceForFee = isFeeSameAsToken + ? userBalance - topUpAmountInTokens + : userBalance; + + return { + topUpAmountInTokens, + availableBalanceForFee, + estimatedGasInToken, + isFeeSameAsToken, + isValid: availableBalanceForFee >= estimatedGasInToken, + }; +};Then use this helper in both
generateApprovalDataandvalidateGaslessFeeBalance.
504-506: HardcodedneedsModuleInstallflag.The comment notes this should come from parent props. If module installation status is known at runtime, consider passing it down to avoid overestimating gas costs.
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🧰 Additional context used
🧠 Learnings (2)
📚 Learning: 2025-09-09T12:40:15.629Z
Learnt from: RanaBug
Repo: pillarwallet/x PR: 391
File: src/apps/pulse/components/Sell/Sell.tsx:113-130
Timestamp: 2025-09-09T12:40:15.629Z
Learning: In the Pulse app Sell component, when a user changes/switches tokens, the input amount automatically resets to 0, which means liquidity validation state doesn't become stale when tokens change.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
📚 Learning: 2025-08-12T07:42:24.656Z
Learnt from: IAmKio
Repo: pillarwallet/x PR: 351
File: src/apps/pulse/utils/intent.ts:44-53
Timestamp: 2025-08-12T07:42:24.656Z
Learning: In the Pulse app's intent utilities (src/apps/pulse/utils/intent.ts), the team has chosen to use floating-point arithmetic for token amount calculations despite potential precision issues, accepting JavaScript's decimal place limitations as a valid trade-off for their use case.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (3)
- GitHub Check: unit-tests
- GitHub Check: build
- GitHub Check: Cloudflare Pages: pillarx-debug
🔇 Additional comments (2)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (2)
420-454: Validation logic is sound, but consider extracting to avoid duplication.The balance validation correctly:
- Converts USD to token units using
tokenPrice- Handles the case when fee token equals topup token
- Provides clear, actionable error messages
This same logic is duplicated in
validateGaslessFeeBalance(lines 609-649). See earlier comment about extracting a shared helper.
689-692: Validation gate before preview is appropriate.Calling
validateGaslessFeeBalancebefore proceeding to preview ensures users see balance errors early. The early return pattern is clean.
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Actionable comments posted: 1
Fix all issues with AI Agents 🤖
In @src/apps/pulse/components/Onboarding/TopUpScreen.tsx:
- Around line 1001-1048: The UI can display "NaN" when amount is an empty
string; update the calculations inside the Onboarding TopUpScreen JSX (the IIFE
that computes tokenPrice, topUpAmountInTokens, gasInTokens, totalNeededInTokens,
hasEnoughBalance) to guard parseFloat(amount) and
parseFloat(estimatedGasCostInToken) by treating NaN as 0 (e.g., use
(parseFloat(amount) || 0) and (parseFloat(estimatedGasCostInToken) || 0)), keep
the existing tokenPrice fallback, and ensure hasEnoughBalance compares against
the sanitized totalNeededInTokens so the displayed values never render NaN.
🧹 Nitpick comments (2)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (2)
420-455: Unit conversion is now correct, but consider extracting duplicate validation logic.The balance validation properly converts USD to token units before comparison, which resolves the unit mismatch issue. However, this validation logic is duplicated in the
validateGaslessFeeBalancefunction (lines 609-652).💡 Consider extracting shared validation logic
The balance validation logic appears in both
generateApprovalDataandvalidateGaslessFeeBalance. Consider extracting it into a shared helper function to reduce duplication and improve maintainability:const calculateBalanceRequirements = ( topUpAmountUSD: number, tokenPrice: number, gasEstimate: number, isFeeSameAsToken: boolean, userBalance: number ) => { const topUpInTokens = tokenPrice > 0 ? topUpAmountUSD / tokenPrice : 0; const availableForFee = isFeeSameAsToken ? userBalance - topUpInTokens : userBalance; const totalNeeded = topUpInTokens + gasEstimate; const isInsufficient = availableForFee < gasEstimate; return { topUpInTokens, availableForFee, totalNeeded, isInsufficient }; };Then both functions can use this helper for consistency.
506-506: HardcodedneedsModuleInstallshould be made dynamic.The TODO comment indicates this value should come from parent props to accurately reflect whether module installation is needed. Currently hardcoding
truemay result in overestimated gas costs for users who already have modules installed.Do you want me to open a new issue to track passing the actual module installation state from the parent component? This would improve gas estimation accuracy for returning users.
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Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
🧰 Additional context used
🧠 Learnings (2)
📚 Learning: 2025-08-12T07:42:24.656Z
Learnt from: IAmKio
Repo: pillarwallet/x PR: 351
File: src/apps/pulse/utils/intent.ts:44-53
Timestamp: 2025-08-12T07:42:24.656Z
Learning: In the Pulse app's intent utilities (src/apps/pulse/utils/intent.ts), the team has chosen to use floating-point arithmetic for token amount calculations despite potential precision issues, accepting JavaScript's decimal place limitations as a valid trade-off for their use case.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
📚 Learning: 2025-09-09T12:40:15.629Z
Learnt from: RanaBug
Repo: pillarwallet/x PR: 391
File: src/apps/pulse/components/Sell/Sell.tsx:113-130
Timestamp: 2025-09-09T12:40:15.629Z
Learning: In the Pulse app Sell component, when a user changes/switches tokens, the input amount automatically resets to 0, which means liquidity validation state doesn't become stale when tokens change.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (4)
- GitHub Check: lint
- GitHub Check: Cloudflare Pages: pillarx-debug
- GitHub Check: unit-tests
- GitHub Check: build
🔇 Additional comments (3)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (3)
327-327: Good documentation improvement.The updated comment clarifies that actual chain gas prices are being fetched for accurate fee estimation, which aligns well with the PR's goal of improving MTS fee calculation accuracy.
604-652: Well-structured validation function.The
validateGaslessFeeBalancefunction correctly:
- Converts USD amounts to token units for accurate comparison
- Handles the case where the fee token is the same as the top-up token
- Provides clear, informative error messages distinguishing between scenarios
- Returns early if gasless is not supported
The implementation properly addresses the unit mismatch issue and provides good defensive validation before transaction submission.
689-692: Excellent defensive validation before proceeding.The validation check ensures users cannot proceed to the preview screen without sufficient balance for both the top-up and gas fees, providing good UX by catching issues early.
There was a problem hiding this comment.
Actionable comments posted: 1
🤖 Fix all issues with AI agents
In @src/apps/pulse/components/Onboarding/TopUpScreen.tsx:
- Around line 1005-1048: The UI always sums top-up + gas into
totalNeededInTokens which is incorrect when the fee token differs from the
top-up token; update the TopUpScreen display logic to mirror
validateGaslessFeeBalance by computing isFeeSameAsToken (compare
selectedFeeAsset.asset.address or symbol with the top-up token identifier) and
set totalNeededInTokens = gasInTokens + (isFeeSameAsToken ? topUpAmountInTokens
: 0); then compute hasEnoughBalance = selectedFeeAsset.balance >=
totalNeededInTokens, ensure parseFloat fallbacks (already used for tokenPrice,
amount, estimatedGasCostInToken) to avoid NaN, and update the displayed "Total
needed" and balance color logic accordingly.
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src/apps/pillarx-app/components/TokenMarketDataRow/tests/__snapshots__/LeftColumnTokenMarketDataRow.test.tsx.snapis excluded by!**/*.snapsrc/apps/pillarx-app/components/TokensWithMarketDataTile/test/__snapshots__/TokensWithMarketDataTile.test.tsx.snapis excluded by!**/*.snap
📒 Files selected for processing (1)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
🧰 Additional context used
🧠 Learnings (2)
📚 Learning: 2025-08-12T07:42:24.656Z
Learnt from: IAmKio
Repo: pillarwallet/x PR: 351
File: src/apps/pulse/utils/intent.ts:44-53
Timestamp: 2025-08-12T07:42:24.656Z
Learning: In the Pulse app's intent utilities (src/apps/pulse/utils/intent.ts), the team has chosen to use floating-point arithmetic for token amount calculations despite potential precision issues, accepting JavaScript's decimal place limitations as a valid trade-off for their use case.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
📚 Learning: 2025-09-09T12:40:15.629Z
Learnt from: RanaBug
Repo: pillarwallet/x PR: 391
File: src/apps/pulse/components/Sell/Sell.tsx:113-130
Timestamp: 2025-09-09T12:40:15.629Z
Learning: In the Pulse app Sell component, when a user changes/switches tokens, the input amount automatically resets to 0, which means liquidity validation state doesn't become stale when tokens change.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (4)
- GitHub Check: unit-tests
- GitHub Check: lint
- GitHub Check: build
- GitHub Check: Cloudflare Pages: pillarx-debug
🔇 Additional comments (3)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (3)
327-327: LGTM - Clearer comment.The updated comment better describes the purpose of fetching the gas price for accurate fee estimation.
604-652: Guard against NaN when amount is empty.If
amountis an empty string,parseFloat(amount)at line 620 returnsNaN, which would flow through the calculations. While this might not cause immediate errors (NaN comparisons typically return false, so validation would fail gracefully), it's cleaner to explicitly handle this case.🛡️ Proposed fix for NaN handling
// Convert topup amount (USD) to token units const topUpAmountUSD = parseFloat(amount) || 0; const topUpAmountInTokens = - tokenPrice > 0 ? topUpAmountUSD / tokenPrice : 0; + tokenPrice > 0 ? topUpAmountUSD / tokenPrice : 0;Actually, the current code already handles this reasonably at line 620 with
|| 0. No change needed here—the validation logic is safe.
689-691: LGTM - Proper validation before proceeding.The gasless fee balance validation is correctly placed before showing the preview screen, ensuring users cannot proceed without sufficient balance.
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Actionable comments posted: 1
🤖 Fix all issues with AI agents
In @src/apps/pulse/components/Onboarding/TopUpScreen.tsx:
- Around line 1005-1049: The UI always adds topUpAmountInTokens to gasInTokens
when computing totalNeededInTokens and hasEnoughBalance, but that only applies
when the fee token equals the top-up token; mirror the validation logic (see
validateGaslessFeeBalance and generateApprovalData which use isFeeSameAsToken).
Fix by computing totalNeededInTokens = (isFeeSameAsToken ? topUpAmountInTokens +
gasInTokens : gasInTokens) and use that value for the displayed "Total needed"
and for hasEnoughBalance (selectedFeeAsset.balance >= totalNeededInTokens), so
the displayed amount and balance color match the actual validation logic.
🧹 Nitpick comments (1)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (1)
420-455: Consider extracting duplicated balance validation logic.The balance validation logic here (lines 420-455) is nearly identical to the logic in
validateGaslessFeeBalance(lines 615-649). Both functions:
- Calculate
topUpAmountInTokensfrom USD amount- Check
isFeeSameAsToken- Calculate
availableBalanceForFee- Validate balance and set identical error messages
This duplication makes maintenance harder and increases the risk of the two implementations diverging.
♻️ Suggested refactor to eliminate duplication
Extract the common logic into a helper function that both can use:
// Helper to calculate balance requirements for gasless transactions const calculateGaslessBalanceRequirements = ( selectedFeeAsset: FeeAsset, selectedToken: SelectedToken | null, amount: string, estimatedGasCostInToken: string ) => { const userBalance = selectedFeeAsset.balance ?? 0; const tokenPrice = parseFloat(selectedFeeAsset.tokenPrice || '0') || 1; const estimatedGasInToken = parseFloat(estimatedGasCostInToken) || 0; const topUpAmountUSD = parseFloat(amount) || 0; const topUpAmountInTokens = tokenPrice > 0 ? topUpAmountUSD / tokenPrice : 0; const isFeeSameAsToken = selectedFeeAsset.asset.contract.toLowerCase() === selectedToken?.address.toLowerCase(); let availableBalanceForFee = userBalance; if (isFeeSameAsToken) { availableBalanceForFee = userBalance - topUpAmountInTokens; } const totalNeededInTokens = topUpAmountInTokens + estimatedGasInToken; const hasSufficientBalance = availableBalanceForFee >= estimatedGasInToken; return { userBalance, topUpAmountInTokens, estimatedGasInToken, totalNeededInTokens, isFeeSameAsToken, hasSufficientBalance }; };Then both
generateApprovalDataandvalidateGaslessFeeBalancecan call this helper and format their error messages accordingly.
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Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
🧰 Additional context used
🧠 Learnings (2)
📚 Learning: 2025-08-12T07:42:24.656Z
Learnt from: IAmKio
Repo: pillarwallet/x PR: 351
File: src/apps/pulse/utils/intent.ts:44-53
Timestamp: 2025-08-12T07:42:24.656Z
Learning: In the Pulse app's intent utilities (src/apps/pulse/utils/intent.ts), the team has chosen to use floating-point arithmetic for token amount calculations despite potential precision issues, accepting JavaScript's decimal place limitations as a valid trade-off for their use case.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
📚 Learning: 2025-09-09T12:40:15.629Z
Learnt from: RanaBug
Repo: pillarwallet/x PR: 391
File: src/apps/pulse/components/Sell/Sell.tsx:113-130
Timestamp: 2025-09-09T12:40:15.629Z
Learning: In the Pulse app Sell component, when a user changes/switches tokens, the input amount automatically resets to 0, which means liquidity validation state doesn't become stale when tokens change.
Applied to files:
src/apps/pulse/components/Onboarding/TopUpScreen.tsx
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (4)
- GitHub Check: unit-tests
- GitHub Check: lint
- GitHub Check: Cloudflare Pages: pillarx-debug
- GitHub Check: build
🔇 Additional comments (3)
src/apps/pulse/components/Onboarding/TopUpScreen.tsx (3)
327-327: LGTM: Clear comment for gas price fetching.The comment accurately describes the purpose of fetching the gas price from the chain for fee estimation.
604-652: Good centralization of validation logic.The
validateGaslessFeeBalancefunction properly centralizes the gasless balance validation with correct logic for handling the case when fee token equals topup token (lines 625-633). The JSDoc is clear and the function signature is clean.Note: The duplication between this function and
generateApprovalDatais addressed in the previous comment.
689-692: LGTM: Proper validation before proceeding with topup.The call to
validateGaslessFeeBalancecorrectly validates the balance before proceeding, with appropriate early return if validation fails.
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