feat(bank): add Relio Payment Platform API integration #2952
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Add new bank integration for Relio AG (Swiss fintech bank) with support for: - Ed25519 request signing authentication - Account and wallet management - Payment order creation - Foreign exchange quotes and execution New files: - relio.service.ts: Main service with Ed25519 signing - relio.dto.ts: TypeScript interfaces for Relio API Configuration via environment variables: - RELIO_BASE_URL - RELIO_API_KEY - RELIO_PRIVATE_KEY - RELIO_ORGANIZATION_ID
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- Change body sorting from recursive to top-level only
- Add query parameter sorting (alphabetical)
- Fix empty object handling (now produces '{}' instead of '')
- Add detailed comments explaining canonical string format
- Use originalUrl (path + query AS-IS) instead of separate params - Sort only top-level body keys (not recursive) - Remove query param sorting (not in NodeJS example)
- Empty object {} returns '' (not '{}') matching NodeJS example
- Arrays are stringified as-is without sorting
- Added complete NodeJS example code in documentation
BREAKING FIX: Empty object {} now returns '{}' not ''
The previous implementation incorrectly assumed the NodeJS example
had a check for Object.keys(request.body).length > 0, but reviewing
the actual code on page 4 of the documentation shows:
- if (request.body) is a truthy check, not a length check
- Empty object {} is truthy, so it enters the block
- JSON.stringify({}) returns '{}'
Also added proper string handling to match the NodeJS example's
'else if (typeof request.body === "string")' branch.
- Add standalone integration test for Relio API - Document Relio environment variables in .env.example - Test covers auth context, accounts, and wallets endpoints
![github-advanced-security[bot]](https://avatars.githubusercontent.com/in/57789?s=60&v=4){kind=small}
Use Promise.all instead of sequential for-loop to fetch wallet details in parallel, improving performance ~3x for multiple wallets.
- Move standalone integration test from __tests__/ to scripts/test-relio.ts (matches existing pattern like test-delegation.ts) - Add unit tests for Relio signing logic and amount conversion (27 test cases covering buildCanonicalBody, createCanonicalString, convertRelioAmount, toRelioAmount)
The script now reads configuration from .env automatically, eliminating the need to set environment variables manually.
Replace partial API key logging with simple "Loaded" indicator to address clear-text logging of sensitive information warning.
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Summary
Changes
src/integration/bank/services/relio.service.ts- Main service with Ed25519 signingsrc/integration/bank/dto/relio.dto.ts- TypeScript interfaces for Relio APIsrc/config/config.ts- Added Relio configurationsrc/integration/bank/bank.module.ts- Registered RelioServiceFeatures
getAuthContext()getAccounts(),getAccount(id)getWallets(),getWallet(id),getBalances()sendPayment(),createPaymentOrder(),cancelScheduledPayment()getFxQuote(),executeFxPayment()Configuration
Test plan
getAuthContext()to verify authenticationgetBalances()to verify wallet retrieval