defi-arbitrage/docs/settlement/as4/EXTERNAL_CONNECTION_RESOLUTION.md

# AS4 Settlement - External Connection Resolution

**Date**: 2026-01-19  
**Status**: ⚠️ **CONFIGURATION COMPLETE - AUTHENTICATION PENDING**

---

## Summary

External database connection configuration has been updated. PostgreSQL Docker container is configured to accept external connections. Authentication needs to be verified/reset.

---

## Configuration Changes Completed

### ✅ 1. Docker Compose Configuration

**File**: `docker/docker-compose.as4.yml`

**Changes Applied**:
- ✅ Added `POSTGRES_HOST_AUTH_METHOD: md5` environment variable
- ✅ Added PostgreSQL command: `listen_addresses=*` to listen on all addresses
- ✅ Added init script volume mount: `./postgres-init:/docker-entrypoint-initdb.d`
- ✅ Added PostgreSQL command parameters for connection settings

**Status**: ✅ **COMPLETE**

### ✅ 2. PostgreSQL pg_hba.conf Configuration

**Changes Applied**:
- ✅ Added host-based authentication rules:
  - `host all all 127.0.0.1/32 md5` (IPv4 localhost)
  - `host all all ::1/128 md5` (IPv6 localhost)
  - `host all all 0.0.0.0/0 md5` (All IPv4 hosts)
  - `host all all ::/0 md5` (All IPv6 hosts)

**Verification**:
```bash
docker compose -f docker/docker-compose.as4.yml exec -T postgres cat /var/lib/postgresql/data/pg_hba.conf | tail -5
```

**Status**: ✅ **COMPLETE**

### ✅ 3. Init Script Created

**File**: `docker/postgres-init/01-init-hba.sh`

**Purpose**: Automatically configure pg_hba.conf on container initialization

**Status**: ✅ **CREATED**

---

## Remaining Issue

### ⚠️ Password Authentication

**Issue**: External connections from localhost fail with:
```
FATAL: password authentication failed for user "dbis_user"
```

**Root Cause**:
- PostgreSQL container was initialized before password configuration
- `POSTGRES_PASSWORD` environment variable only affects initial database setup
- Password may need to be reset or container recreated

---

## Resolution Steps

### Option 1: Reset Password (Recommended)

```bash
# 1. Connect to container and reset password
docker compose -f docker/docker-compose.as4.yml exec -T postgres \
  psql -U dbis_user -d postgres -c "ALTER USER dbis_user WITH PASSWORD 'dbis_password';"

# 2. Reload PostgreSQL configuration
docker compose -f docker/docker-compose.as4.yml exec -T postgres \
  psql -U dbis_user -d postgres -c "SELECT pg_reload_conf();"

# 3. Test connection
psql postgresql://dbis_user:dbis_password@localhost:5432/dbis_core -c "SELECT version();"
```

### Option 2: Recreate Container (Clean Setup)

```bash
# 1. Stop and remove container (keeps data volume)
cd docker
docker compose -f docker-compose.as4.yml stop postgres
docker compose -f docker-compose.as4.yml rm -f postgres

# 2. Remove volume (if starting fresh - WARNING: deletes all data)
docker volume rm docker_postgres_data

# 3. Start fresh container
docker compose -f docker-compose.as4.yml up -d postgres

# 4. Wait for initialization
sleep 10

# 5. Test connection
psql postgresql://dbis_user:dbis_password@localhost:5432/dbis_core -c "SELECT version();"
```

### Option 3: Check for Port Conflict

```bash
# Check what's using port 5432
sudo lsof -i :5432

# If local PostgreSQL is running, stop it
sudo systemctl stop postgresql
# or
sudo service postgresql stop

# Restart Docker PostgreSQL
cd docker
docker compose -f docker-compose.as4.yml restart postgres
```

---

## Verification Steps

### Step 1: Verify Container is Running
```bash
docker compose -f docker/docker-compose.as4.yml ps postgres
```

**Expected**: Status should show "Up" and healthy

### Step 2: Test Internal Connection
```bash
docker compose -f docker/docker-compose.as4.yml exec -T postgres \
  psql -U dbis_user -d dbis_core -c "SELECT version();"
```

**Expected**: PostgreSQL version output

### Step 3: Test External Connection
```bash
psql postgresql://dbis_user:dbis_password@localhost:5432/dbis_core -c "SELECT version();"
```

**Expected**: PostgreSQL version output (may need password reset first)

### Step 4: Run Migration
```bash
export DATABASE_URL=postgresql://dbis_user:dbis_password@localhost:5432/dbis_core
npx prisma migrate deploy
```

**Expected**: Migration applied successfully

### Step 5: Verify Tables
```bash
docker compose -f docker/docker-compose.as4.yml exec -T postgres \
  psql -U dbis_user -d dbis_core -c "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public' AND table_name LIKE 'as4_%' ORDER BY table_name;"
```

**Expected**: 6 AS4 tables listed

### Step 6: Seed Marketplace
```bash
export DATABASE_URL=postgresql://dbis_user:dbis_password@localhost:5432/dbis_core
npx ts-node --transpile-only scripts/seed-as4-settlement-marketplace-offering.ts
```

**Expected**: "AS4 Settlement Marketplace Offering created"

---

## Alternative: Use Docker Internal Connection

If external connection continues to have issues, you can use Docker's internal networking:

```bash
# Use Docker exec for all database operations
docker compose -f docker/docker-compose.as4.yml exec -T postgres \
  psql -U dbis_user -d dbis_core

# Or run scripts inside Docker network
docker compose -f docker/docker-compose.as4.yml run --rm -e DATABASE_URL=postgresql://dbis_user:dbis_password@postgres:5432/dbis_core \
  dbis-core npx prisma migrate deploy
```

---

## Configuration Summary

### Files Modified
1. ✅ `docker/docker-compose.as4.yml` - Updated with connection settings
2. ✅ `docker/postgres-init/01-init-hba.sh` - Created init script
3. ✅ PostgreSQL `pg_hba.conf` - Updated with host authentication rules

### Configuration Applied
- ✅ `POSTGRES_HOST_AUTH_METHOD: md5` - Password authentication enabled
- ✅ `listen_addresses=*` - Listening on all addresses
- ✅ Host-based authentication rules added to pg_hba.conf

### Status
- ✅ **Configuration**: Complete
- ✅ **pg_hba.conf**: Updated
- ✅ **Docker Compose**: Updated
- ⚠️ **Authentication**: Needs verification/reset
- ⏳ **Migration**: Waiting for connection fix
- ⏳ **Seeding**: Waiting for connection fix

---

## Next Steps

1. **Reset password** using Option 1 above
2. **Verify external connection** works
3. **Run migration**: `npx prisma migrate deploy`
4. **Seed marketplace**: `npx ts-node --transpile-only scripts/seed-as4-settlement-marketplace-offering.ts`
5. **Start server**: `npm run dev`
6. **Test endpoints**: `./scripts/test-as4-api.sh`

---

**Configuration Status**: ✅ **COMPLETE**  
**Connection Status**: ⚠️ **NEEDS PASSWORD RESET**

All configuration files are updated and ready. Once the password is reset and connection verified, the system will be fully operational.

---

**End of Document**