bch-dex/src/entities/offer.js

/*
  Offer Entity
  An Offer Entity is nearly the same as an Order. But while an Order is generated
  by a webhook from P2WDB, the Offer Entity is created internally. It is used
  to track an Order generated by this application.

  The Offer tracks the hdIndex address used to hold tokens or BCH for sale.
*/
class Offer {
  validate (data) {
    const {
      messageType,
      messageClass,
      tokenId,
      buyOrSell,
      rateInSats,
      minSatsToExchange,
      numTokens
    } = data

    // Input Validation
    if (!messageType || typeof messageType !== 'number') {
      throw new Error("Property 'messageType' must be an integer number.")
    }
    if (!messageClass || typeof messageClass !== 'number') {
      throw new Error("Property 'messageClass' must be an integer number.")
    }
    if (!tokenId || typeof tokenId !== 'string') {
      throw new Error("Property 'tokenId' must be a string.")
    }
    if (!buyOrSell || typeof buyOrSell !== 'string') {
      throw new Error("Property 'buyOrSell' must be a string.")
    }
    if (!rateInSats || typeof rateInSats !== 'number') {
      throw new Error("Property 'rateInSats' must be an integer number.")
    }
    if (!minSatsToExchange || typeof minSatsToExchange !== 'number') {
      throw new Error("Property 'minSatsToExchange' must be an integer number.")
    }
    if (!numTokens || typeof numTokens !== 'number') {
      throw new Error("Property 'numTokens' must be a number.")
    }

    const offerData = {
      messageType,
      messageClass,
      tokenId,
      buyOrSell,
      rateInSats,
      minSatsToExchange,
      numTokens
    }

    return offerData
  }
}

module.exports = Offer