auction.js

import promiseAllProps from 'promise-all-props'
import wallet from './wallet'
import mtn from './mtn'

const auction = {}

const toInt = str => parseInt(str, 10)

auction.getStatus = function() {
  const token = mtn.mtntoken.methods
  const auctions = mtn.auctions.methods

  return promiseAllProps({
    currentAuction: auctions.currentAuction().call(),
    currentPrice: auctions.currentPrice().call(),
    genesisTime: auctions
      .genesisTime()
      .call()
      .then(toInt),
    globalMtnSupply: auctions.globalMtnSupply().call(),
    lastPurchasePrice: auctions.lastPurchasePrice().call(),
    lastPurchaseTick: auctions
      .lastPurchaseTick()
      .call()
      .then(toInt),
    mintable: auctions.mintable().call(),
    nextAuction: auctions.nextAuction().call(),
    totalSupply: token.totalSupply().call()
  })
    .then(
      ({
        currentAuction,
        currentPrice,
        genesisTime,
        globalMtnSupply,
        lastPurchasePrice,
        lastPurchaseTick,
        mintable,
        nextAuction,
        totalSupply
      }) => {
        return {
          currentAuction,
          currentPrice,
          genesisTime,
          lastPurchasePrice,
          lastPurchaseTime: genesisTime + lastPurchaseTick * 60,
          nextAuctionStartTime: toInt(nextAuction._startTime),
          tokenCirculation: totalSupply,
          tokenRemaining: mintable,
          tokenSold:
            globalMtnSupply && mintable
              ? mtn.web3.utils
                  .toBN(globalMtnSupply)
                  .sub(mtn.web3.utils.toBN(mintable))
                  .toString()
              : '0'
        }
      }
    )
    .catch(err => {
      throw err
    })
}

auction.buy = function(amount) {
  const from = wallet.getAddress()
  const weiAmount = mtn.web3.utils.toWei(amount.replace(',', '.'))
  return wallet.sendTransaction(from, mtn.auctions.options.address, weiAmount)
}

export default auction