nicolasburtey/invoices

Library for parsing Lightning Network BOLT11 payment requests and encoding invoices into requests

Invoices

Utility methods for parsing Lightning Network BOLT 11 payment requests, as well as encoding unsigned requests and signing payment requests.

Methods

byteDecodeRequest

Derive a payment request from request data.

{
  encoded: <Payment Request Details Hex String>
  [mtokens]: <Millitokens Number String>
  network: <Network Name String>
  words: <Words Count Number>
}

@throws
<Error>

@returns
{
  request: <BOLT 11 Encoded Payment Request String>
}

Example:

const {byteDecodeRequest} = require('invoices');

// Get a BOLT 11 payment request for this invoice data
const {request} = byteDecodeRequest({
  encoded: paymentRequestDetailsHexString,
  mtokens: '0',
  network: 'bitcoin',
});

byteEncodeRequest

Derive bytes for payment request details

{
  request: <BOLT 11 Encoded Payment Request String>
}

@throws
<Error>

@returns
{
  encoded: <Payment Request Details Hex String>
  mtokens: <Millitokens Number String>
  network: <Network Name String>
  words: <Word Length Number>
}

Example:

const {byteEncodeRequest} = require('invoices');

// Get the bytes for a payment request
const {encoded, mtokens, network} = byteEncodeRequest({
  request: bolt11EncodedPaymentRequestString,
});

createSignedRequest

Assemble a signed payment request

{
  destination: <Destination Public Key Hex String>
  hrp: <Request Human Readable Part String>
  signature: <Request Hash Signature Hex String>
  tags: [<Request Tag Word Number>]
}

@throws
<Error>

@returns
{
  request: <BOLT 11 Encoded Payment Request String>
}

Example:

const {createSignedRequest} = require('invoices');

// Get hrp and signature from createUnsignedRequest
// Get signature via standard private key signing, or LND signBytes
const {request} = createSignedRequest({
  destination: nodePublicKey,
  hrp: amountAndNetworkHrp,
  signature: signedPreimageHash,
  tags: paymentRequestTags,
});

createUnsignedRequest

Create an unsigned payment request

{
  [chain_addresses]: [<Chain Address String>]
  [cltv_delta]: <CLTV Delta Number>
  [created_at]: <Invoice Creation Date ISO 8601 String>
  [description]: <Description String>
  [description_hash]: <Description Hash Hex String>
  destination: <Public Key String>
  [expires_at]: <ISO 8601 Date String>
  features: [{
    bit: <BOLT 09 Feature Bit Number>
  }]
  id: <Preimage SHA256 Hash Hex String>
  [mtokens]: <Requested Milli-Tokens Value String> (can exceed Number limit)
  network: <Network Name String>
  [payment]: <Payment Identifier Hex String>
  [routes]: [[{
    [base_fee_mtokens]: <Base Fee Millitokens String>
    [channel]: <Standard Format Channel Id String>
    [cltv_delta]: <Final CLTV Expiration Blocks Delta Number>
    [fee_rate]: <Fee Rate Millitokens Per Million Number>
    public_key: <Forward Edge Public Key Hex String>
  }]]
  [tokens]: <Requested Chain Tokens Number> (note: can differ from mtokens)
}

@returns
{
  hash: <Payment Request Signature Hash Hex String>
  hrp: <Human Readable Part of Payment Request String>
  preimage: <Signature Hash Preimage Hex String>
  tags: [<Data Tag Number>]
}

Example:

const {createUnsignedRequest} = require('invoices');

const unsignedComponents = createUnsignedRequest({
  destination: nodePublicKey,
  id: rHashHexString,
  network: 'bitcoin',
});
// Use createSignedRequest and a signature to create a complete request

parsePaymentRequest

Parse a BOLT 11 payment request into its component data

Note: either description or description_hash will be returned

{
  request: <BOLT 11 Payment Request String>
}

@throws
<Error>

@returns
{
  [chain_addresses]: [<Chain Address String>]
  cltv_delta: <CLTV Delta Number>
  created_at: <Invoice Creation Date ISO 8601 String>
  [description]: <Description String>
  [description_hash]: <Description Hash Hex String>
  destination: <Public Key String>
  expires_at: <ISO 8601 Date String>
  features: [{
    bit: <BOLT 09 Feature Bit Number>
    is_required: <Feature Support is Required To Pay Bool>
    type: <Feature Type String>
  }]
  id: <Payment Request Hash String>
  is_expired: <Invoice is Expired Bool>
  [mtokens]: <Requested Milli-Tokens Value String> (can exceed Number limit)
  network: <Network Name String>
  [payment]: <Payment Identifier Hex Encoded String>
  [routes]: [[{
    [base_fee_mtokens]: <Base Fee Millitokens String>
    [channel]: <Standard Format Channel Id String>
    [cltv_delta]: <Final CLTV Expiration Blocks Delta Number>
    [fee_rate]: <Fee Rate Millitokens Per Million Number>
    public_key: <Forward Edge Public Key Hex String>
  }]]
  [safe_tokens]: <Requested Chain Tokens Rounded Up Number>
  [tokens]: <Requested Chain Tokens Number> (note: can differ from mtokens)
}

const {parsePaymentRequest} = require('invoices');

// Decoded details of the payment request
const requestDetails = parsePaymentRequest({request: 'paymentRequestString'});