bolt07

BOLT07

Utilities for working with Lightning Network BOLT 07

Examples

Sample code for working with bolt07 utility functions:

Formats

• Channel: x delimited format designed to be readable.
• Id: The raw channel id format specified by bolt07.
• Number: Interpreting the raw channel id format as a uint64.

Chan Format

const {chanFormat} = require('bolt07');

const id = '15fbe70000260000';
const number = '1584113681139367936';

try {
  const fromNumber = chanFormat({number}).channel;
  // fromNumber === '1440743x38x0'
} catch (err) {
  // valid channel, no error
}

try {
  const fromId = chanFormat({id}).channel;
  // fromId === '1440743x38x0'
} catch (err) {
  // valid id, no error
}

Chan Number

const {chanNumber} = require('bolt07');

const channel = '1440743x38x0';
const id = '15fbe70000260000';

try {
  const fromChannel = chanNumber({channel}).number;
  // fromChannel === '1584113681139367936'
} catch (err) {
  // valid channel, no error
}

try {
  const fromId = chanNumber({id}).number;
  // fromId === '1584113681139367936'
} catch (err) {
  // valid id, no error
}

Decode Chan Id

Returns components of a channel id or channel number.

const {decodeChanId} = require('bolt07');

const channel = '1440743x38x0';
const id = '15fbe70000260000';
const number = '1584113681139367936';

try {
  const fromChannel = decodeChanId({channel});
  // fromChannel.block_height === 1440743
  // fromChannel.block_index === 38
  // fromChannel.output_index === 0
} catch (err) {
  // valid channel, no error
}

try {
  const fromId = decodeChanId({id});
  // fromId.block_height === 1440743
  // fromId.block_index === 38
  // fromId.output_index === 0
} catch (err) {
  // valid id, no error
}

try {
  const fromNumber = decodeChanId({channel});
  // fromNumber.block_height === 1440743
  // fromNumber.block_index === 38
  // fromNumber.output_index === 0
} catch (err) {
  // valid number, no error
}

Encode Chan Id

Returns channel id when components are specified

const {encodeChanId} = require('bolt07');

try {
  const encoded = encodeChanId({
    block_height: 1440743,
    block_index: 38,
    output_index: 0,
  });

  // encoded.channel === '1440743x38x0'
  // encoded.id === '15fbe70000260000'
  // encoded.number === '1584113681139367936'
} catch (err) {
  // valid components, no error
}

Raw Chan Id

Returns a raw channel id in numeric format.

const {rawChanId} = require('bolt07');

const channel = '1440743x38x0';
const number = '1584113681139367936';

try {
  const idFromNumber = rawChanId({number}).id;
  // idFromNumber === '15fbe70000260000'
} catch (err) {
  // valid number, no error
}

try {
  const idFromChannel = rawChanId({channel}).id;
  // idFromChannel === '15fbe70000260000'
} catch (err) {
  // valid channel, no error
}