@dazaar/payment-eth

dazaar-payment-eth

Ethereum payment api for Dazaar stream services

Usage

const PaymentETH = require('dazaar-payment-eth')
const market = require('dazaar/market')
const Index = require('@hyperdivision/eth-transaction-indexer')
const hypercore = require('hypercore')

const index = new Index(hypercore('./tmp/db'), {
  endpoint: 'https://infura...'
})

const m = market('./tmp')
const feed = hypercore('./tmp/data')

const paymentCard = {
  id: 'dazaartest22',
  payment: [{
    method: 'ETH',
    payToPubKey: '0x50c7d91e74b0e42bd8bce8ad6d199e4a23c0b193',
    currency: 'microether',
    amount: 1,
    unit: 'seconds',
    interval: 1
  }]
}

let payment

// instantiate a seller for a feed and equip it
// with a validate function
const seller = m.sell(feed, {
  validate (remoteKey, cb) {
    payee.validate(remoteKey, cb)
  }
})

seller.ready(function (err) {
  // payment now set up. dazaar logic follows ...
  payment = new PaymentETH(seller, paymentCard, index)
})

Buyer

// instantiate a buyer for a specific feed
const buyer = m.buy(seller.key)

// generate the ethereum adress to pay to for a given stream
const payTo = PaymentETH.tweak(buyer.key, dazaarCard, 'microether')

// pay the desired amount to the address generated

API

const payment = PaymentETH(seller, payment, index)

Create a new eth payment instance associated to a seller. seller should be a dazaar seller instance, payment may either be a dazaar payment card, or a string specifying the per second rate in either ETH, such as 0.0002 ETH/s. index should be a transaction indexer

payment.validate(buyerKey, cb)

A seller can validate the time left for a given buyer. Returns error if there is no time left on the subscription. The method shall check whether the given buyer has a subscription set-up and instantiate one not already present.

const payTo = PaymentETH.tweak(buyerKey, dazaarCard, [paymentType])

Static method to generate the ETH address to pay to for a given stream. buyerKey is the buyer's dazaar key and dazaarCard give the relevant stream details.

License

MIT