🛠 Refactor to use commands

commands/stack.js

@@ -0,0 +1,31 @@
+module.exports = async (kraken, validate, getEnv) => {
+  const [fiat, amount] = getEnv('KRAKEN_API_FIAT', 'KRAKEN_BUY_AMOUNT')
+
+  // https://www.kraken.com/features/api
+  const crypto = 'XBT'
+  const pair = `X${crypto}Z${fiat}`
+
+  // Fetch and display information
+  const { result: { [`Z${fiat}`]: fiatBalance, [`X${crypto}`]: cryptoBalance } } = await kraken.api('Balance')
+  const { result: { [pair]: { a: [a], b: [b] } } } = await kraken.api('Ticker', { pair })
+
+  const ask = parseFloat(a)
+  const bid = parseFloat(b)
+  const price = bid
+
+  // Calculate volume and adjust precision
+  const volume = (amount / price).toFixed(8)
+
+  console.log('💰  Balance:', fiatBalance, fiat, '/', cryptoBalance, crypto, '\n')
+  console.log('📈  Ask:', ask, fiat)
+  console.log('📉  Bid:', bid, fiat, '\n')
+
+  // Place order
+  const details = { pair, type: 'buy', ordertype: 'limit', price, volume }
+  if (validate) details.validate = true
+
+  const { result: { descr: { order }, txid } } = await kraken.api('AddOrder', details)
+
+  console.log('💸  Order:', order)
+  if (txid) console.log('📎  Transaction ID:', txid.join(', '))
+}

commands/withdraw.js

@@ -0,0 +1,25 @@
+module.exports = async (kraken, validate, getEnv) => {
+  const [maxFee, key] = getEnv('KRAKEN_MAX_REL_FEE', 'KRAKEN_WITHDRAW_KEY')
+
+  // https://api.kraken.com/0/private/WithdrawInfo
+  const asset = 'XBT'
+  const withdrawdetails = { asset, key, amount: 0 }
+
+  // Get withdrawal information
+  const { result: { limit, fee } } = await kraken.api('WithdrawInfo', withdrawdetails)
+  const relFee = 1/parseFloat(limit)*parseFloat(fee)
+
+  console.log(`💡  Relative fee of withdrawal amount: ${(relFee*100).toFixed(2)}%`)
+
+  // Place withdrawal when fee is low enough (relatively)
+  if (relFee < maxFee/100) {
+    console.log(`💰  Withdraw ${limit} ${asset} now.`)
+    const withdraw = { asset, key, amount: limit }
+    if (!validate) {
+      const { result: { refid } } = await kraken.api('Withdraw', withdraw)
+      if (refid) console.log(`📎  Withdrawal reference ID: ${refid}`)
+    }
+  } else {
+    console.log(`❌  Fee is too high - max rel. fee: ${parseFloat(maxFee).toFixed(2)}%`)
+  }
+}