Asset Balance Reconciliation Engine

[Kingsman-99]

Description

After batch invoice payments, the SDK's internal accounting of sent amounts can drift from on-chain balances due to failed operations, fee deductions, or claimable balance unclaims. A reconciliation engine should compare the SDK's internal PaymentRecord ledger against actual on-chain balances fetched from Horizon and surface any discrepancies as typed reconciliation findings.

Technical Context

Add src/reconciliationEngine.ts. Fetches actual balances via @stellar/stellar-sdk Server.loadAccount(). Reads PaymentRecord[] from src/recorder.ts. Computes expected vs actual balance deltas per asset per account. Adds ReconciliationFinding and ReconciliationReport to src/types.ts. Integrates with src/complianceExporter.ts to include reconciliation findings in compliance exports.

Acceptance Criteria

• ReconciliationEngine.reconcile(accountId, assetCode, dateRange): Promise<ReconciliationReport> compares internal records to Horizon for the given date range
• ReconciliationReport.findings lists each ReconciliationFinding with { expectedDelta, actualDelta, discrepancy, severity: 'info' | 'warning' | 'critical' }
• Discrepancies attributable to fees alone are tagged severity: 'info'; unexplained discrepancies above a configurable threshold are 'critical'
• ReconciliationReport.isBalanced is true only when all findings have zero discrepancy
• Unit tests fabricate payment records and mock Horizon balances to assert that a missing payment surfaces as a 'critical' finding
• All CI checks (npm test, npm run build, ESLint/TypeScript) pass and the branch has no merge conflicts

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[Dev-ElvisTobi]

@Dev-ElvisTobi has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Please assign

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[reactjay]

@Jay989810 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello maintainer i would love to work on fixing this issue as soon as it assigned to me

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[EA10-lite]

@EA10-lite has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi! I'd like to work on this issue. I have 3+ years of experience building TypeScript backend libraries and integrating with the Stellar SDK, including transaction processing, financial reconciliation, and comprehensive automated testing. I estimate this will take about 2-3 hours to implement, test, and document. I'll build the reconciliation engine, integrate it with the compliance exporter, add thorough unit tests covering the required scenarios, and ensure all CI checks (npm test, npm run build, and ESLint/TypeScript) pass before submitting a PR.

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[CHEF-SAVY]

@CHEF-SAVY has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I can work on this.
Please assign

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[GOE001]

@GOE001 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would like to work on this

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Congratulations, @CHEF-SAVY! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

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