Satcomma Javascript Library

Small library that converts values either in Bitcoin, Satoshis or BIP-0176 Bits, into the proposed Satcomma Standard notation format.

Methods

Each method takes in a

• mandatory javascript number argument.
• optional options object which has the following structure:

{
    decimalDelimiter?: string, // default = ',' (comma). Delimiter can be whatever you want.
    integerDelimiter?: string, // default = '' (no delimiter). Delimiter can be whatever you want.
    validateBitcoinMaxSupply?: boolean //default = true
}

Methods include

satcomma.fromBitcoin(number, object?): string

satcomma.fromSats(number, object?): string

satcomma.fromBits(number, object?): string

Example use

const satcomma = require('satcomma');

satcomma.fromBitcoin(6.15000001) // => "6.15,000,001"

satcomma.fromSats(698000) // => "0.00,698,000"

satcomma.fromBits(698) // => "0.00,698,000"

satcomma.fromBitcoin(6.15000001, {decimalDelimiter: " "}) // => "6.15 000 001"

satcomma.fromSats(698000, {decimalDelimiter: "'"}) // => "0.00'698'000"

satcomma.fromBitcoin(698000000000000.15000001, {
    validateBitcoinMaxSupply: false, 
    integerDelimiter: ",",
    decimalDelimiter: " "
}) // => "210,000,000,000,000.00 000 000"

Validation

• For each method the number input is not larger than the maximum amount of satoshis allowed my the Bitcoin system aka (21000000 * 1e8). If so a TypeError will be raised.
• fromSats() will error if the satoshi input is an integer.
• fromBits() will error if a float is provided with a decimal precision of more than 2.

Dependancies

We only have one dependency which is with the small big.js library, which avoids floating point errors when formatting large numbers to satcomma.

Installation

npm install satcomma

Tests

Run tests using:

npm test

These tests use the Jest test framework.

LICENSE MIT