CreateSessionToken RPC

Overview

The CreateSessionToken RPC creates a session token for payment processing. This token maintains state across multiple payment operations, enabling secure tracking and improved security for multi-step payment flows.

Business Use Case: When processing payments that require multiple steps (3DS authentication, redirect flows, wallet payments), you need to maintain session state between requests. This RPC creates a session token that carries context through the entire payment journey.

Purpose

Why use session tokens?

Scenario	Session Token Benefit
3DS authentication	Maintain context through challenge flow
Redirect payments	Preserve state during bank redirects
Multi-step checkout	Track progress across pages
Security	Bind payment to specific session

Key outcomes:

• Session-scoped payment context
• Secure state management
• Cross-request continuity
• Enhanced fraud protection

Request Fields

Field	Type	Required	Description
merchant_session_id	string	Yes	Your unique session reference
amount	Money	Yes	Payment amount for this session
metadata	SecretString	No	Additional metadata for the connector
connector_feature_data	SecretString	No	Connector-specific metadata
state	ConnectorState	No	Existing state to continue session
browser_info	BrowserInformation	No	Browser details for fraud detection
test_mode	bool	No	Use test/sandbox environment

Response Fields

Field	Type	Description
error	ErrorInfo	Error details if creation failed
status_code	uint32	HTTP-style status code
session_token	string	Session token for subsequent operations

Example

Request (grpcurl)

grpcurl -H "x-connector: stripe" \
  -H "x-connector-config: {\"config\":{\"Stripe\":{\"api_key\":\"$STRIPE_API_KEY\"}}}" \
  -d '{
    "merchant_session_id": "session_001",
    "amount": {
      "minor_amount": 10000,
      "currency": "USD"
    },
    "browser_info": {
      "accept_header": "text/html",
      "user_agent": "Mozilla/5.0..."
    },
    "test_mode": true
  }' \
  localhost:8080 \
  types.MerchantAuthenticationService/CreateSessionToken

Response

{
  "session_token": "sess_1234567890abcdef",
  "status_code": 200
}

Next Steps

• CreateAccessToken - Generate API access tokens
• CreateSdkSessionToken - Initialize wallet sessions
• Payment Service - Process payments using session