ICN Gateway API (OpenAPI directory)

The ICN Gateway provides a REST and WebSocket API for cooperative applications.

Quick Links

• OpenAPI Specification - Full API specification (use with Swagger UI or Redoc)
• Pilot Coordinator Guide - Deployment and operations guide

Base URL

http://localhost:8080/v1

Authentication

The Gateway uses DID-based challenge-response authentication with JWT tokens.

Getting a Token

# 1. Request challenge
curl -X POST http://localhost:8080/v1/auth/challenge \
  -H "Content-Type: application/json" \
  -d '{"did": "did:icn:YOUR_DID"}'

# Response: {"challenge": "abc123...", "expires_at": "..."}

# 2. Sign and verify (using icnctl)
TOKEN=$(icnctl auth token --coop my-coop)

# 3. Use token
curl -H "Authorization: Bearer $TOKEN" \
  http://localhost:8080/v1/coops/my-coop

Endpoints Overview

Health

Authentication

Cooperatives

Ledger

Governance

WebSocket

Common Examples

Create a Cooperative

curl -X POST http://localhost:8080/v1/coops \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "id": "food-coop",
    "name": "Downtown Food Cooperative",
    "description": "A community food buying club"
  }'

Make a Payment

curl -X POST http://localhost:8080/v1/ledger/food-coop/payment \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "did:icn:recipient",
    "amount": 2,
    "currency": "hours",
    "memo": "Garden help - 2 hours weeding"
  }'

Create a Governance Proposal

curl -X POST http://localhost:8080/v1/gov/domains/coop:food/proposals \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "title": "Approve new supplier contract",
    "description": "Vote to approve the contract with Green Valley Farms",
    "kind": "text"
  }'

Cast a Vote

curl -X POST http://localhost:8080/v1/gov/proposals/$PROPOSAL_ID/vote \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"choice": "for"}'

Connect to WebSocket

const ws = new WebSocket('ws://localhost:8080/v1/ws/food-coop');

ws.onopen = () => {
  ws.send(JSON.stringify({ type: 'Auth', token: TOKEN }));
};

ws.onmessage = (event) => {
  const msg = JSON.parse(event.data);
  if (msg.type === 'AuthOk') {
    console.log('Authenticated as', msg.did);
  } else if (msg.type === 'Event') {
    console.log('Event:', msg);
  }
};

Rate Limiting

All authenticated endpoints are rate-limited per DID:

• Burst capacity: 100 requests
• Refill rate: 10 tokens/second

When rate limited, the API returns HTTP 429 with a Retry-After header.

Error Responses

All errors return JSON with error and message fields:

{
  "error": "Forbidden",
  "message": "Missing required scope: ledger:write"
}

WebSocket Events

After authentication, you'll receive events as they occur:

Running Examples

Run the example script to test all API endpoints:

# Run health check only (no token needed)
./docs/api/examples.sh

# Run all examples with authentication
export TOKEN=$(icnctl auth token --coop my-coop)
./docs/api/examples.sh

The script demonstrates:

• Health checks
• Cooperative management
• Member management
• Ledger operations (balance, payments)
• Governance (domains, proposals, voting)

Viewing the OpenAPI Spec

You can view the interactive API documentation using:

Swagger UI

docker run -p 8081:8080 -e SWAGGER_JSON=/spec/openapi.yaml \
  -v $(pwd)/docs/api:/spec swaggerapi/swagger-ui

Then open http://localhost:8081

Redoc

docker run -p 8081:80 -e SPEC_URL=/spec/openapi.yaml \
  -v $(pwd)/docs/api:/usr/share/nginx/html/spec redocly/redoc

Then open http://localhost:8081

SDK Support

• TypeScript: See sdk/typescript/ for the official TypeScript client
• Python: Coming soon
• Rust: Use icn-gateway crate directly

License

MIT OR Apache-2.0