n8n-nodes-interledger

[Velocity BPA Licensing Notice]

This n8n node is licensed under the Business Source License 1.1 (BSL 1.1).

Use of this node by for-profit organizations in production environments requires a commercial license from Velocity BPA.

For licensing information, visit https://velobpa.com/licensing or contact licensing@velobpa.com.

A comprehensive n8n community node for the Interledger Protocol (ILP), providing 21 resources and 150+ operations for Open Payments, STREAM protocol, SPSP, Rafiki integration, Web Monetization, connectors, and cross-currency payments.

Features

• Open Payments API: Full support for wallet addresses, incoming/outgoing payments, quotes, and grants
• STREAM Protocol: Streaming payments with money and data streams
• SPSP (Simple Payment Setup Protocol): Payment pointer resolution and SPSP payments
• Rafiki Integration: Admin API for Rafiki open-source implementation
• Web Monetization: Monetization links, payment streams, and receipt verification
• ILP Packet Handling: Create, parse, serialize, and validate ILP packets
• Connector Operations: Manage peers, routes, accounts, and liquidity
• Cross-Currency Payments: Exchange rates, FX quotes, and multi-asset support
• HTTP Signatures: Ed25519 request signing per Open Payments specification
• Trigger Node: Real-time webhooks for 30+ event types

Installation

Community Nodes (Recommended)

1. Open your n8n instance
2. Go to Settings > Community Nodes
3. Click Install a community node
4. Enter n8n-nodes-interledger
5. Click Install

Manual Installation

# Navigate to your n8n installation directory
cd ~/.n8n

# Install the package
npm install n8n-nodes-interledger

Development Installation

# Clone or extract the package
cd n8n-nodes-interledger

# Install dependencies
npm install

# Build the project
npm run build

# Create symlink to n8n custom nodes
mkdir -p ~/.n8n/custom
ln -s $(pwd) ~/.n8n/custom/n8n-nodes-interledger

# Restart n8n
n8n start

Credentials Setup

Interledger Credentials

Multi-purpose credentials for ILP operations.

Field	Description	Required
Configuration Type	Rafiki, Connector, STREAM, or Custom	Yes
Wallet Address	Payment pointer (e.g., $wallet.example.com/alice)	Yes
Private Key	Ed25519 private key (base64)	Yes
Public Key	Ed25519 public key (base64)	Yes
Key ID	Unique key identifier URL	Yes
ILP Address	Your ILP address (for connector mode)	No
Asset Code	Currency code (USD, EUR, XRP, etc.)	No
Asset Scale	Decimal places for amounts	No
Shared Secret	Base64 shared secret for STREAM	No

Open Payments Credentials

For Open Payments API operations.

Field	Description	Required
Wallet Address URL	Full URL of wallet address	Yes
Client Private Key	Ed25519 private key for signing	Yes
Client Public Key	Ed25519 public key	Yes
Key ID	Key identifier for HTTP signatures	Yes
Authorization Server URL	GNAP auth server URL	No
Incoming Payment Token	Pre-authorized access token	No
Outgoing Payment Token	Pre-authorized access token	No

Rafiki Admin Credentials

For Rafiki administrative operations.

Field	Description	Required
Admin URL	Rafiki Admin API URL	Yes
API Key	Admin API authentication key	No
Auth Method	None, API Key, or Bearer Token	Yes

SPSP Credentials

For Simple Payment Setup Protocol operations.

Field	Description	Required
Payment Pointer	Receiver payment pointer	Yes
Receiver Endpoint	SPSP endpoint URL	No
Shared Secret	Shared secret for STREAM setup	No

Resources & Operations

Wallet Address

• Get Wallet Address, Get Keys, Create, Update
• Get by URL, Resolve Payment Pointer
• Get Supported Assets, Get Balance

Incoming Payment

• Create, Get, List, Complete
• Get by URL, Get Received Amount
• Get Expiration, Cancel

Outgoing Payment

• Create, Get, List, Get by URL
• Get Sent Amount, Get Failed Amount
• Cancel, Get Quote

Quote

• Create, Get, Get by ID
• Get Expiration, Calculate Exchange Rate
• Get Fee Estimate, Get Path Payment Quote

Grant

• Request, Get, Continue, Cancel
• Revoke, Get Status, List
• Get Access Token

Payment Pointer

• Resolve, Get Metadata, Validate
• Get SPSP Endpoint, Get Receiver Info

STREAM

• Create Connection, Send Payment, Receive Payment
• Get Connection ID, Get Shared Secret
• Close Connection, Get State
• Get Money Received/Sent

SPSP

• Query Endpoint, Send Payment
• Get Response, Get Destination Details
• Get Shared Secret, Get Destination Account

ILP Packet

• Create Prepare/Fulfill/Reject Packets
• Parse, Validate, Get Type, Get Data
• Serialize, Deserialize

Connector

• Get Info, Get Routes, Get Peers
• Add/Remove Peer, Get/Add/Remove Liquidity
• Get Balance, Get Rate, Get Supported Protocols

Account

• Create, Get, Update, Delete, List
• Get Balance, Get Settings
• Send To, Receive From

Peer

• Add, Get, Update, Remove, List
• Get Status, Get Balance
• Configure, Test Connection

Route

• Add, Get, Update, Delete, List
• Get Best Route, Get Route Table
• Configure Routing, Get Cost

Asset

• Get, List, Create, Update
• Get Scale, Get Code, Get Exchange Rate
• Convert Amount, Get Supported Assets

Liquidity

• Add, Remove, Get Balance
• Get for Asset, Get by Peer
• Deposit, Withdraw, Get Events

Rafiki Admin

• Create/Get/Update Wallet Address
• Create/Get Asset
• Create/Get/Update/Delete Peer
• Get Health, Get Stats

Web Monetization

• Create Link, Verify, Get Status
• Get Payment Stream, Get Receipt
• Verify Receipt, Get WMRI

Payment (High-Level)

• Send, Receive, Get, List
• Get Status, Cancel, Retry
• Get Proof

Exchange

• Get Rate, Get FX Quote, Execute
• Get Supported Pairs, Get Rate History
• Calculate Conversion

Webhook

• Create, Get, Update, Delete, List
• Get Events, Verify Signature

Utility

• Validate/Parse Payment Pointer
• Format/Validate ILP Address
• Convert Amount, Generate Key Pair
• Sign/Verify Data, Get Protocol Version

Trigger Node

The Interledger Trigger node monitors events via webhooks:

Incoming Payment Events: Created, Completed, Expired, Received, Partial

Outgoing Payment Events: Created, Completed, Failed, Sent, Cancelled

Quote Events: Created, Expired, Accepted

Grant Events: Requested, Approved, Denied, Revoked

STREAM Events: Connection Opened/Closed, Money Received/Sent, Error

Connector Events: Peer Connected/Disconnected, Route Added/Removed, Liquidity/Balance Changed

Wallet Events: Created, Updated, Balance Changed

Web Monetization Events: Started, Stopped, Payment Stream, Receipt Verified

Usage Examples

Sending a Payment via Open Payments

// 1. Create an outgoing payment
{
  "resource": "outgoingPayment",
  "operation": "create",
  "walletAddressUrl": "https://wallet.example.com/alice",
  "quoteId": "https://wallet.example.com/quotes/abc123",
  "metadata": {
    "description": "Payment for services"
  }
}

Receiving Payments with Incoming Payment

// 1. Create an incoming payment
{
  "resource": "incomingPayment",
  "operation": "create",
  "walletAddressUrl": "https://wallet.example.com/alice",
  "incomingAmount": {
    "value": "1000",
    "assetCode": "USD",
    "assetScale": 2
  },
  "expiresAt": "2024-12-31T23:59:59Z"
}

SPSP Payment

// 1. Query SPSP endpoint
{
  "resource": "spsp",
  "operation": "queryEndpoint",
  "paymentPointer": "$wallet.example.com/alice"
}

// 2. Send payment
{
  "resource": "spsp",
  "operation": "sendPayment",
  "paymentPointer": "$wallet.example.com/alice",
  "amount": "500",
  "assetCode": "USD",
  "assetScale": 2
}

STREAM Protocol Payment

// 1. Create STREAM connection
{
  "resource": "stream",
  "operation": "createConnection",
  "destinationAccount": "g.example.alice",
  "sharedSecret": "base64-shared-secret"
}

// 2. Send money via STREAM
{
  "resource": "stream",
  "operation": "sendPayment",
  "amount": "10000",
  "connectionId": "conn-123"
}

Web Monetization Integration

// 1. Create monetization link
{
  "resource": "webMonetization",
  "operation": "createLink",
  "paymentPointer": "$wallet.example.com/creator",
  "rel": "monetization"
}

// 2. Verify receipt
{
  "resource": "webMonetization",
  "operation": "verifyReceipt",
  "receipt": "base64-encoded-receipt"
}

Connector Operations

// 1. Get connector info
{
  "resource": "connector",
  "operation": "getInfo"
}

// 2. Add peer
{
  "resource": "peer",
  "operation": "add",
  "ilpAddress": "g.peer.example",
  "endpoint": "http://peer.example.com/ilp",
  "authToken": "peer-auth-token"
}

// 3. Add liquidity
{
  "resource": "liquidity",
  "operation": "add",
  "assetCode": "USD",
  "amount": "100000"
}

Grant Management

// 1. Request a grant
{
  "resource": "grant",
  "operation": "request",
  "walletAddressUrl": "https://wallet.example.com/alice",
  "accessType": "outgoing-payment",
  "actions": ["create", "read"],
  "limits": {
    "debitAmount": {
      "value": "10000",
      "assetCode": "USD",
      "assetScale": 2
    }
  }
}

// 2. Continue interactive grant
{
  "resource": "grant",
  "operation": "continue",
  "continueUri": "https://auth.example.com/continue/abc",
  "continueToken": "continue-token-xyz"
}

Cross-Currency Payment

// 1. Get exchange rate
{
  "resource": "exchange",
  "operation": "getRate",
  "sourceAsset": "USD",
  "destinationAsset": "EUR"
}

// 2. Create cross-currency quote
{
  "resource": "quote",
  "operation": "create",
  "walletAddressUrl": "https://wallet.example.com/alice",
  "receiver": "https://wallet.eu.example.com/bob",
  "debitAmount": {
    "value": "1000",
    "assetCode": "USD",
    "assetScale": 2
  }
}

Rafiki Admin Operations

// 1. Create asset
{
  "resource": "rafikiAdmin",
  "operation": "createAsset",
  "code": "USD",
  "scale": 2
}

// 2. Create wallet address
{
  "resource": "rafikiAdmin",
  "operation": "createWalletAddress",
  "url": "https://wallet.example.com/alice",
  "publicName": "Alice's Wallet",
  "assetId": "asset-uuid-here"
}

Payment Verification

// 1. Get payment proof
{
  "resource": "payment",
  "operation": "getProof",
  "paymentId": "payment-uuid"
}

// 2. Verify webhook signature
{
  "resource": "webhook",
  "operation": "verifySignature",
  "payload": "webhook-body",
  "signature": "signature-header",
  "secret": "webhook-secret"
}

Interledger Protocol Concepts

ILP Address

A hierarchical identifier for accounts on the Interledger network.

• Format: allocation.connector.account
• Example: g.rafiki.alice (global allocation, rafiki connector, alice account)
• Allocations: g. (global), test. (testnet), private. (private networks)

Payment Pointer

Human-readable identifier that resolves to a wallet address.

• Format: $host/path
• Example: $wallet.example.com/alice
• Resolves to: https://wallet.example.com/.well-known/pay/alice

Asset Scale

The number of decimal places for an asset's smallest unit.

• USD: scale 2 (cents) - 100 = $1.00
• XRP: scale 6 - 1000000 = 1 XRP
• BTC: scale 8 (satoshis) - 100000000 = 1 BTC

STREAM Protocol

Multiplexed transport protocol for streaming payments over ILP.

• Supports money streams (payments) and data streams
• Uses encryption (AES-256-GCM) for privacy
• Provides reliable delivery with packet framing

SPSP (Simple Payment Setup Protocol)

Protocol for setting up payments using payment pointers.

• Query endpoint returns destination account and shared secret
• Used to initiate STREAM connections

Open Payments

REST API standard for interacting with ILP wallets.

• Wallet Addresses: Account identifiers
• Incoming Payments: Receive funds
• Outgoing Payments: Send funds
• Quotes: Cost estimates for payments
• Grants: Authorization via GNAP

Condition/Fulfillment

Cryptographic mechanism ensuring atomic payments.

• Condition: SHA-256 hash of fulfillment (32 bytes)
• Fulfillment: Pre-image that satisfies condition
• Ensures payment only completes if condition is met

ILP Packet Types

• Prepare: Initiates a payment with amount, expiry, condition
• Fulfill: Completes payment with fulfillment proof
• Reject: Declines payment with error code and message

Networks

Network	Prefix	Description
Global	g.	Main production network
Test	test.	Public testnet for development
Private	private.	Private/internal networks
Local	local.	Local development
Example	example.	Documentation examples
Peer	peer.	Peer-specific addresses
Self	self.	Local connector

Error Handling

The node provides structured error handling with ILP-specific error codes:

Final Errors (F00-F99): Unrecoverable

• F00: Bad Request
• F01: Invalid Packet
• F02: Unreachable
• F03: Invalid Amount
• F04: Insufficient Destination Amount
• F05: Wrong Condition
• F06: Unexpected Payment
• F07: Cannot Receive
• F08: Amount Too Large
• F99: Application Error

Temporary Errors (T00-T99): Retryable

• T00: Internal Error
• T01: Peer Unreachable
• T02: Peer Busy
• T03: Connector Busy
• T04: Insufficient Liquidity
• T99: Application Error

Relative Errors (R00-R99): Path-specific

• R00: Transfer Timed Out
• R01: Insufficient Source Amount
• R02: Insufficient Timeout
• R99: Application Error

Security Best Practices

1. Protect Private Keys: Never expose Ed25519 private keys in logs or responses
2. Verify Signatures: Always verify HTTP signatures on incoming requests
3. Validate Payment Pointers: Ensure payment pointers resolve to legitimate endpoints
4. Check Grant Permissions: Verify grants have appropriate access rights
5. Verify Fulfillments: Always validate fulfillments against conditions
6. Secure Shared Secrets: Treat STREAM shared secrets as sensitive
7. Use HTTPS: Always use TLS for ILP communications
8. Verify Webhook Signatures: Authenticate incoming webhook events
9. Handle Rate Limits: Implement backoff for rate-limited requests
10. Validate Amounts: Check amounts against expected scales and limits

Development

# Install dependencies
npm install

# Build the project
npm run build

# Run tests
npm test

# Run tests with coverage
npm run test:coverage

# Run linting
npm run lint

# Fix linting issues
npm run lint:fix

# Watch mode for development
npm run dev

Author

Velocity BPA

• Website: velobpa.com
• GitHub: Velocity-BPA

Licensing

This n8n community node is licensed under the Business Source License 1.1.

Free Use

Permitted for personal, educational, research, and internal business use.

Commercial Use

Use of this node within any SaaS, PaaS, hosted platform, managed service, or paid automation offering requires a commercial license.

For licensing inquiries:
licensing@velobpa.com

See LICENSE, COMMERCIAL_LICENSE.md, and LICENSING_FAQ.md for details.

Contributing

Contributions are welcome! Please ensure:

1. Code follows existing style (run npm run lint)
2. Tests pass (npm test)
3. Add tests for new functionality
4. Update documentation as needed

Support

• Issues: GitHub Issues
• Documentation: Interledger.org
• Open Payments Spec: openpayments.guide
• Rafiki: github.com/interledger/rafiki

Acknowledgments

• Interledger Foundation for the ILP specification
• Open Payments for the REST API standard
• Rafiki for the open-source implementation
• n8n for the workflow automation platform