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node-btcpay

Install

npm i btcpay

Private key generation

  • Generate and save private key:
$ node -p "require('btcpay').crypto.generate_keypair().getPrivate('hex')"
XXXXXXXXXXXXXXXXXXXXX

Store the printed value in a safe place, e.g. environment variables

Pairing

After generating your private key, you have to pair your client with your BTCPay store:

  • On BTCPay Server > Stores > Settings > Access Tokens > Create a new token, (leave PublicKey blank) > Request pairing
  • Copy pairing code:
  • Pair client to server and save returned token:
# Replace the BTCPAY_XXX envirnoment variables with your values and run:

$ [space] BTCPAY_URL=https://mydomain.com/ BTCPAY_KEY=... BTCPAY_PAIRCODE=... node -e "const btcpay=require('btcpay'); new btcpay.BTCPayClient(process.env.BTCPAY_URL, btcpay.crypto.load_keypair(Buffer.from(process.env.BTCPAY_KEY, 'hex'))).pair_client(process.env.BTCPAY_PAIRCODE).then(console.log).catch(console.error)"

# (prepend the line with a space to prevent BTCPAY_KEY from being saved to your bash history)

>>> { merchant: 'XXXXXX' }

Store the value of "merchant" in a safe place, e.g. environment variables

Recreating a client

After pairing your client to the store, you can recreate the client as needed and use it in your code

const btcpay = require('btcpay')
const keypair = btcpay.crypto.load_keypair(new Buffer.from(<PRIVATEKEY>, 'hex'))

// Recreate client
const client = new btcpay.BTCPayClient(<BTCPAYURL>, keypair, {merchant: <MERCHANT>})

Get rates

Fetches current rates from BitcoinAverage (using your BTCPayServer)

client.get_rates(['BTC_USD'], <STOREID>)
  .then(rates => console.log(rates))
  .catch(err => console.log(err))

The first argument accepts a comma-separated list of currency pair.

Create invoice

See BitPay Invoice API documentation

client.create_invoice({price: 20, currency: 'USD'})
  .then(invoice => console.log(invoice.url))
  .catch(err => console.log(err))

Get invoice

client.get_invoice(<invoice-id>)
  .then(invoice => console.log(invoice.status))
  .catch(err => console.log(err))