docs: add session handover document for ABDM M1, M2, and M3 HIU fixes
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ABDM_M1_M2_M3_SESSION_HANDOVER.md
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ABDM_M1_M2_M3_SESSION_HANDOVER.md
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# ABDM M1, M2 & M3 Integration Session Handover
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**Session Name:** `ABDM M1 Search, M2 User-Initiated Linking & M3 HIU Consent Fixes`
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**Antigravity Conversation ID:** `227da3ab-2456-4a5d-a2ab-c74059c3178b`
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**Last Updated:** September 10, 2026 (Server Local Time: 00:56)
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**Git Branch:** `main` | **Latest Commit:** `b89bace`
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---
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## 🚀 Quick Resume Instructions for Tomorrow
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### 1. In Antigravity IDE
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1. Open Antigravity IDE with workspace `HMS_CI4_OLD`.
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2. In the Chat panel, click the **Chat History / Clock icon** (left drawer).
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3. Select this session: **`ABDM M1 Search, M2 User-Initiated Linking & M3 HIU Consent Fixes`** (ID: `227da3ab-2456-4a5d-a2ab-c74059c3178b`).
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4. Type your next request or question to continue seamlessly!
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*Tip: If opening a new chat, mention `@ABDM_M1_M2_M3_SESSION_HANDOVER.md` to instantly restore all session context.*
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---
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## 📌 Summary of Completed Work
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### 1. ABDM M1: "Find ABHA by Mobile" Complete Profile Flow
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- **Challenge:** Previously, after searching linked ABHA numbers via mobile OTP in Step 1, selecting an ABHA ID required a redundant "Verify ABHA ID" step to retrieve the patient's full demographic profile (name, gender, DOB, address, photo, etc.).
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- **Solution:**
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- Integrated direct verification API flow upon ABHA profile selection.
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- Automatically loads and populates the complete KYC details (full name, gender, DOB, mobile, address, ABHA address, profile photo base64) directly into the patient registration form.
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- Fixed multi-step wizard state indicators in the registration modal.
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---
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### 2. ABDM M2: User-Initiated Linking Architecture & Implementation
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- **Context & Observation from ABDM Team:**
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> *"M2: User initiated linking: There is understanding gap in user initiated linking flow.*
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> *FLOW: Patient must be registered without ABHA details in your system -> Records will be created in your system -> User will link them on their own end using PHR app."*
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- **Network Topology Architecture:**
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- `HMS (behind NAT on premise/VPN)` $\longleftrightarrow$ `ABDM Bridge (Live in Cloud)` $\longleftrightarrow$ `ABDM Gateway` $\longleftrightarrow$ `PHR App (e.g. ABHA App, Aarogya Setu)`
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- Each HMS has a unique domain/subdomain reachable by the Bridge via VPN or cloud tunnel.
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- **HMS Implementation:**
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- **Database Migration:** `2026-09-09-000003_CreateAbdmLinkTransactions.php` creates table `abdm_link_transactions` (tracks `transaction_id`, `patient_reference`, `care_context_reference`, `auth_mode`, `otp_hash`, `expiry_at`, `status`).
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- **Discovery Endpoint:** Handles `/v3/hip/patient/care-context/discover` from the Bridge:
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- Matches patient by demographic data (Mobile number, Name, Gender, Year of Birth).
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- Returns patient UHID (`p_code`) and all unlinked care contexts (OPD visits, IPD admissions, Lab investigations, Pharmacy dispense records).
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- **Linking Initiation (`/v3/hip/link/init`):**
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- Generates authentication OTP or confirms direct link.
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- **Linking Confirmation (`/v3/hip/link/confirm`):**
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- Verifies OTP and permanently registers link in `abdm_link_transactions` and updates `patient_master.abdm_linked_at`.
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- **Bridge Walkthrough Verified:** Analyzed and approved the ABDM Bridge Walkthrough specification (`ABDM_BridgeSide_M2_workthrouh.txt`).
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---
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### 3. M3 HIU Consent Requests List: Live Server 500 Error Resolution
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- **Issue:** On the live server (`https://demo.e-atria.net`), opening **"ABHA Patient Request List"** triggered:
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`Failed to load: Unable to load consent requests.`
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HAR log showed: `GET https://demo.e-atria.net/AbdmHiu/patient_request_list_data?q=&status=` returning `500 Internal Server Error` with empty response body `""`.
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- **Root Cause Analysis:**
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1. **Memory Exhaustion on Decrypted FHIR Bundles:** `abdm_hiu_workflows` stores multi-megabyte decrypted base64 bundles in `response_json` for `data_fetch` and `hi_data_push_callback`. Querying 2000 rows exhausted PHP memory (`128M`), triggering a fatal memory limit error.
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2. **Hardcoded Column Selection:** The query hardcoded 17 columns in `SELECT` without checking table fields. Any schema difference on the remote database caused a fatal `DatabaseException` (`Unknown column in field list`).
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3. **Array-to-String Cast Warnings:** In PHP 8.2+, accessing nested payload objects (`requester`, `purpose`, `expiry`, `hi_types`) that arrived as associative arrays triggered `Array to string conversion` warnings, which CodeIgniter converted to fatal `ErrorException`s.
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4. **Missing Exception Handling:** `AbdmHiu::patientRequestListData()` lacked a `try ... catch` block, causing CI in production to respond with HTTP 500 and empty content.
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5. **Column Mismatch on `patient_master`:** Looked for `p_mobile` instead of actual columns `mphone1` and `mphone2`.
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- **Changes Applied & Tested:**
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- `app/Controllers/AbdmHiu.php`: Wrapped in `try ... catch (\Throwable $e)`, added error logging, and guaranteed clean JSON response.
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- `app/Libraries/Abdm/ConsentSessionListService.php`:
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- Dynamically queries only existing columns in `abdm_hiu_workflows`.
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- Masks large JSON fields at the SQL level (`CASE WHEN operation IN ('data_fetch', 'hi_data_push_callback') THEN NULL ELSE response_json END`).
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- Added `extractScalarString()` and safe array parsing.
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- Updated phone resolution (`mphone1`, `mphone2`) and cleaned full names.
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- Adopted stable session correlation algorithm matching `Patient.php`.
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- `app/Views/abdm/patient_request_list.php`: Enhanced fetch error handling to display HTTP status codes cleanly.
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- **Git Commit:** `b89bace` pushed to `origin/main`.
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---
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## ⚙️ Live Server Deployment Step
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When deploying to `demo.e-atria.net`:
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```bash
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git pull origin main
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php spark cache:clear
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```
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---
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## 📂 Key Files & References
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| File | Purpose |
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| :--- | :--- |
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| `app/Controllers/AbdmHiu.php` | Controller for HIU Consent Request List & Document fetch |
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| `app/Libraries/Abdm/ConsentSessionListService.php` | Core service computing global consent sessions and status |
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| `app/Views/abdm/patient_request_list.php` | UI view for ABHA Patient Request List table and modal |
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| `app/Database/Migrations/2026-09-09-000003_CreateAbdmLinkTransactions.php` | M2 user-initiated linking database table migration |
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| `ABDM_BridgeSide_M2_workthrouh.txt` | Detailed specification for ABDM Bridge user-initiated linking |
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| `app/Controllers/Patient.php` | Per-patient OPD profile ABDM consent and linking management |
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---
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## 📋 Open Items / Next Steps for Tomorrow
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1. **Live Verification on `demo.e-atria.net`:**
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- Verify that **ABHA Patient Request List** loads all historical requests smoothly without error.
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2. **M2 User-Initiated Linking End-to-End Test:**
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- Create an unlinked patient in HMS.
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- Add an OPD visit and a prescription/document.
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- Use ABHA/PHR App on Sandbox to discover records using mobile number and complete linking with OTP.
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- Verify care context shows as linked on both Bridge and HMS.
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3. **M2 Pull & Push Sync Verification:**
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- Verify automatic push of newly created OPD prescriptions and diagnostic reports for linked care contexts.
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