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AS4 Settlement Setup Guide

Date: 2026-01-19
Version: 1.0.0

Prerequisites

Node.js 18+
PostgreSQL 14+
Redis 7+ (for nonce tracking)
Prisma CLI
Access to DBIS database

Step 1: Database Migration

Run the Prisma migration to create the AS4 settlement tables:

cd dbis_core
npx prisma generate
npx prisma migrate deploy

Or for development:

npx prisma migrate dev --name add_as4_settlement_models

Step 2: Environment Variables

Add the following environment variables to your .env file:

# AS4 Gateway Configuration
AS4_BASE_URL=https://as4.dbis.org
AS4_GATEWAY_PORT=8443

# Certificate Configuration
AS4_TLS_CERT_PATH=/path/to/tls/cert.pem
AS4_TLS_KEY_PATH=/path/to/tls/key.pem
AS4_SIGNING_CERT_PATH=/path/to/signing/cert.pem
AS4_SIGNING_KEY_PATH=/path/to/signing/key.pem

# HSM Configuration (if using HSM)
HSM_ENABLED=true
HSM_PROVIDER=softhsm
HSM_SLOT=0
HSM_PIN=your-pin

# Redis Configuration (for nonce tracking)
REDIS_URL=redis://localhost:6379
AS4_NONCE_TTL=300  # 5 minutes in seconds

# ChainID 138 Configuration
CHAIN138_RPC_URL=http://192.168.11.250:8545
CHAIN138_ANCHOR_INTERVAL=3600  # 1 hour in seconds

# Compliance Configuration
SANCTIONS_SCREENING_ENABLED=true
AML_CHECKS_ENABLED=true

Step 3: Seed Marketplace Offering

Run the seed script to add the AS4 Settlement offering to the marketplace:

npx ts-node scripts/seed-as4-settlement-marketplace-offering.ts

Step 4: Verify Routes

The AS4 routes are automatically registered in src/integration/api-gateway/app.ts:

/api/v1/as4/gateway/* - AS4 Gateway endpoints
/api/v1/as4/directory/* - Member Directory endpoints
/api/v1/as4/settlement/* - Settlement endpoints

Step 5: Certificate Setup

For DBIS (Settlement Institution)

Generate TLS certificate:

openssl req -x509 -newkey rsa:2048 -keyout as4-tls-key.pem -out as4-tls-cert.pem -days 365 -nodes

Generate signing certificate:

openssl req -x509 -newkey rsa:2048 -keyout as4-signing-key.pem -out as4-signing-cert.pem -days 365 -nodes

Calculate fingerprints:

openssl x509 -fingerprint -sha256 -noout -in as4-tls-cert.pem
openssl x509 -fingerprint -sha256 -noout -in as4-signing-cert.pem

Store certificates securely (HSM recommended for production)

For Members

Members will register their certificates via the Member Directory API during onboarding.

Step 6: Testing

Health Check

curl http://localhost:3000/health

Register Test Member

curl -X POST http://localhost:3000/api/v1/as4/directory/members \
  -H "Content-Type: application/json" \
  -d '{
    "memberId": "TEST-MEMBER-001",
    "organizationName": "Test Bank",
    "as4EndpointUrl": "https://test-bank.example.com/as4",
    "tlsCertFingerprint": "AA:BB:CC:DD:EE:FF",
    "allowedMessageTypes": ["DBIS.SI.202", "DBIS.SI.202COV"]
  }'

Submit Test Instruction

curl -X POST http://localhost:3000/api/v1/as4/settlement/instructions \
  -H "Content-Type: application/json" \
  -d '{
    "fromMemberId": "TEST-MEMBER-001",
    "payloadHash": "abc123",
    "message": {
      "MessageId": "MSG-001",
      "BusinessType": "DBIS.SI.202",
      "CreatedAt": "2026-01-19T12:00:00Z",
      "FromMemberId": "TEST-MEMBER-001",
      "ToMemberId": "DBIS",
      "Instr": {
        "InstrId": "INSTR-001",
        "ValueDate": "2026-01-20",
        "Currency": "USD",
        "Amount": "1000.00",
        "DebtorAccount": "MSA:TEST-MEMBER-001:USD",
        "CreditorAccount": "MSA:TEST-MEMBER-002:USD"
      }
    }
  }'

Step 7: Production Deployment

High Availability

Deploy multiple AS4 gateway instances behind a load balancer
Use shared Redis cluster for nonce tracking
Configure database replication

Monitoring

Set up Prometheus metrics
Configure alerting for:
- Certificate expiration warnings
- Failed instruction rate
- System availability
- Message processing latency

Security

Enable HSM for key management
Configure firewall rules
Set up DDoS protection
Enable audit logging

Troubleshooting

Database Connection Issues

Check database connectivity:

psql -h 192.168.11.105 -U dbis_user -d dbis_core -c "SELECT 1"

Certificate Issues

Verify certificate format:

openssl x509 -in cert.pem -text -noout

Redis Connection Issues

Test Redis connectivity:

redis-cli -h localhost -p 6379 ping

Support

For issues or questions:

Documentation: /docs/settlement/as4/
Operational Runbooks: /docs/settlement/as4/OPERATIONAL_RUNBOOKS.md
Incident Response: /docs/settlement/as4/INCIDENT_RESPONSE.md

End of Setup Guide

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