btcr-did-tools-js: A JavaScript repository from artk42

Install

git clone https://github.com/WebOfTrustInfo/btcr-did-tools-js.git
npm install

Resolve a BTCR DID

resolveFromTxref("did:btcr:xkyt-fzgq-qq87-xnhn").then(ddo => {
  console.log(JSON.stringify(ddo, null, 4));
}, error => {
  console.error(error)
});

Create BTCR DID

This is a prototype-only script to create BTCR DIDs.

Preparation

We recommend starting in testnet mode. You will need testnet addresses for the input address and the change address.

If you are new to this, please start with the instructions in "Getting started with Bitcoin and testnet", at the end

Ensure your private key WIF is available as an environment variable

export WIF=<privateKeyWif>

Create BTCR DID with DDO/1 ref

node createBtcrDidCmd.js -i <inputAddress> -c <changeAddress> -d <link-to-ddo.jsonld>

Create BTCR DID without DDO/1 ref

node createBtcrDidCmd.js -i <inputAddress> -c <changeAddress>

Output

The output indicates the (to-be-confirmed) txid. You need to wait for confirmations until the txref is known.

You can check the transaction status at a site like https://live.blockcypher.com/btc-testnet/

transaction details:{
  "status" : "success",
  "data" : {
    "network" : "BTCTEST",
    "txid" : "67c0ee676221d9e0e08b98a55a8bf8add9cba854f13dda393e38ffa1b982b833"
  }
}

Usage

The default node is testnet; call --help for more options

node createBtcrDid.js --help

Browserify this library

Run the following command if you make changes to this library

npm run build

That creates a browserified version, called btcrDidUtils.js, which you should copy into the BTCR playground (overwrite the existing one).

Utilities

This library exposes a variety of utilities. Some examples are below

Get hex-encoded public key from txref

node utilCmd.js -n <mainnet|testnet> -t <txref>

Get hex-encoded public key from wif

Assuming process.env.WIF contains the WIF

node utilCmd.js -n <mainnet|testnet>

Getting started with Bitcoin and testnet

How to generate testnet addresses

If you don't have a testnet address yet, and don't know how to create one, you can start with this client-side address generator: https://www.bitaddress.org/?testnet=true.

As this is a client-side address generator, and will be passing private keys, go ahead and disconnect your internet connection. Even though this is testnet mode, it's a good practice to start following.

Once you've disconnected from the internet and generated a testnet address, record the Bitcoin address (what you can share with the public) and the Private Key (always keep this private). The private key is in Wallet Import Format (WIF).

How to get testnet funds

Lastly, you'll need some funds in your input (funding) address before creating the Bitcoin testnet transaction in the following steps.

To get some testnet funds, search for a testnet faucet and send to your input address.

Be sure to hold onto your private keys. Even in testnet mode, you'll want to send your testnet coins back to the faucet provider when you are finished. This tool only uses a small amount of money, and many testnet faucets will send you much more than you need.

artk42/btcr-did-tools-js