[LBCron]

🐞 Bug Fix Pull Request

📌 Related Issue

Closes #2450

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🛠️ Description of the Fix

• Bug description: verifyEdOnDestinationInternal subtracted destFee from the transferred asset even when destFeeAsset was a separate feeAsset, skipped calculateTotalXcmFee for PolkadotXcm.execute (method === 'execute') transfers, and omitted originFee when usesOriginFeeAsset was true.
• Fix summary:
  • Destructure fee: originFee and asset: originFeeAsset from xcmFeeResult.origin and subtract originFee when usesOriginFeeAsset(api, origin, currency, destAsset, resolvedFeeAsset, originFeeAsset) is true.
  • Gate xcmFeeToSubtract on paysDestFee, use calculateTotalXcmFee(destAsset, xcmFeeResult) when isTypeAndThenMethod || method === 'execute', and check isAssetEqual(destFeeAsset, destAsset) before subtracting destFee for other methods.
  • Add 3 unit tests in packages/sdk-core/src/transfer/verify-ed/verifyEdOnDestinationInternal.test.ts covering separate feeAsset destination fee, execute hop + destination fee deduction, and usesOriginFeeAsset origin fee deduction (13/13 passing in verifyEdOnDestinationInternal.test.ts, 1439/1439 passing across @paraspell/sdk-core).

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✅ Contributor Eligibility

• My GitHub account's commit history is at least 6 months old.
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• I disclose any AI tools used to help write this fix (or confirm none were used), and I understand and can explain/defend the resulting code myself.
• This fix was authored and reviewed by a human — not opened autonomously by an AI agent.
• I will respond to maintainer review questions with specific, on-topic answers within 5 days.
• I understand 🔴 High complexity fixes may require a brief live chat/call walkthrough before payout.
• This is the only bug bounty issue I currently have reserved.

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✅ Checklist

• My code follows the project's code style.
• I have added tests that prove my fix is effective (if applicable).
• I have updated the documentation where necessary.
• I have verified the fix does not introduce new issues.