initial commit

lifo-conversion/index.js

@@ -0,0 +1,77 @@
+const csvToJson = require('convert-csv-to-json')
+const converter = require('json-2-csv')
+const fs = require('fs')
+const BN = require('bignumber.js')
+
+const coin = process.argv[2]
+
+const pre2022 = csvToJson.fieldDelimiter(',').getJsonFromCsv(`./${coin}.csv`)
+
+const utxos = []
+
+const handleBuy = (utxo) => {
+	utxo.Remaining = new BN(utxo.ReceivedQuantity)
+	utxos.push(utxo)
+}
+
+const handleTrade = (trade) => {
+	if (trade.ReceivedCurrency === coin) return handleBuy(trade)
+	consumeUtxos(new BN(trade.SentQuantity))
+}
+
+const consumeUtxos = (amount) => {
+	for (let i = utxos.length - 1; i >= 0; i--) {
+		const utxo = utxos[i]
+
+		if (!utxo.Remaining) continue
+
+		if (utxo.Remaining.gt(amount)) {
+			utxo.Remaining = utxo.Remaining.minus(amount)
+			return
+		} else {
+			amount = amount.minus(utxo.Remaining)
+			utxo.Remaining = 0
+			return consumeUtxos(amount)
+		}
+	}
+}
+
+pre2022.forEach(tx => {
+	if (tx.Ignored || tx.Margin) return
+
+	switch (tx.Type) {
+		case 'Buy':
+		case 'Receive':
+			handleBuy(tx)
+			break
+		case 'Sell':
+		case 'Send':
+			consumeUtxos(new BN(tx.SentQuantity))
+			break
+		case 'Trade':
+			handleTrade(tx)
+			break
+		case 'Transfer':
+			break
+	}
+
+	if (tx.FeeCurrency === coin) consumeUtxos(new BN(tx.FeeAmount))
+})
+
+const remaining = utxos
+	.filter(utxo => !!utxo.Remaining)
+	.map(utxo => {
+		return {
+			Date: utxo.Date,
+			Asset: coin,
+			Credit: utxo.Remaining.toFixed(8),
+			Debit: '',
+			Price: new BN(utxo['ReceivedCostBasis(USD)']).div(utxo.ReceivedQuantity).toFixed(4),
+			Original: utxo.ReceivedQuantity,
+		}
+	}
+)
+
+converter.json2csv(remaining).then(csv =>
+	fs.appendFileSync(`./${coin}-utxos.csv`, csv)
+);