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Matt Hill
228
hifo/index.js
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228
hifo/index.js
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const csvToJson = require('convert-csv-to-json')
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const converter = require('json-2-csv')
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const fs = require('fs')
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const BN = require('bignumber.js')
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const { PDFDocument } = require('pdf-lib')
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const txs = csvToJson.fieldDelimiter(',').getJsonFromCsv(`../Ledger.csv`)
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let utxos = []
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let dispositions = []
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const handleBuy = (tx, i) => {
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const { Date: date, Asset, Received, Price } = tx
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utxos.push({
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Date: date,
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Id: i,
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Asset,
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Amount: Received,
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Price,
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Remaining: new BN(Received),
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})
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}
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const createDisposition = (tx, utxo, amount, st) => {
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const costBasis = amount.times(utxo.Price)
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const proceeds = amount.times(tx.Price)
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const gainLoss = proceeds.minus(costBasis)
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return {
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Date: tx.Date,
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Asset: tx.Asset,
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Utxo: utxo.Id,
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Amount: amount.toFixed(8),
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PurchasePrice: utxo.Price,
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DateAcquired: utxo.Date,
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SalePrice: tx.Price,
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CostBasis: costBasis.toFixed(2),
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Proceeds: proceeds.toFixed(2),
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GainLoss: gainLoss.toFixed(2),
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ShortTerm: st ? 'true' : '',
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Tax: gainLoss.gt(0) ? gainLoss.times(st ? .24 : .15).toFixed(2) : 0
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}
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}
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const consumeUtxos = (tx) => {
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const copy = []
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for (i = 0; i < utxos.length; i++) {
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copy[i] = utxos[i];
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}
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const sorted = copy
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.filter(utxo => utxo.Asset === tx.Asset && !utxo.Remaining.isZero())
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.sort((a, b) => new BN(b.Price).minus(a.Price).toNumber())
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const txDate = new Date(tx.Date).valueOf()
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const stUtxo = sorted.find(utxo => txDate - new Date(utxo.Date).valueOf() < 31556926000)
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const ltUtxo = sorted.find(utxo => txDate - new Date(utxo.Date).valueOf() >= 31556926000)
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// find the best utxo
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let utxo
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// decide st vs lt
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let st
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if (!stUtxo && !ltUtxo) {
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console.error(`WARNING: No utxo available! Assuming $0 cost basis:\n-Date:${tx.Date}\n-Asset: ${tx.Asset}\n-Sent: ${tx.Sent}\n-Remaining: ${tx.Remaining.toFixed(8)}\n`)
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utxo = {
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Date: '2017-01-01T12:00:00',
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Id: -1,
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Asset: tx.Asset,
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Amount: tx.Remaining.toFixed(8),
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Price: '0',
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Remaining: tx.Remaining,
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}
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} else if (!stUtxo) {
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utxo = utxos.find(u => u.Id === ltUtxo.Id)
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st = false
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} else if (!ltUtxo) {
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utxo = utxos.find(u => u.Id === stUtxo.Id)
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st = true
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} else {
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const { Tax: stTax } = getProvisional(tx, stUtxo, true)
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const { Tax: ltTax } = getProvisional(tx, ltUtxo, false)
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if (new BN(stTax).lt(ltTax)) {
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utxo = utxos.find(u => u.Id === stUtxo.Id)
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st = true
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} else {
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utxo = utxos.find(u => u.Id === ltUtxo.Id)
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st = false
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}
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}
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if (utxo.Remaining.gte(tx.Remaining)) {
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const disposition = createDisposition(tx, utxo, tx.Remaining, st)
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dispositions.push(disposition)
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utxo.Remaining = utxo.Remaining.minus(tx.Remaining)
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} else {
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const disposition = createDisposition(tx, utxo, utxo.Remaining, st)
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dispositions.push(disposition)
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tx.Remaining = tx.Remaining.minus(utxo.Remaining)
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utxo.Remaining = new BN(0)
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consumeUtxos(tx)
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}
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}
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const getProvisional = (tx, utxo, st) => {
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if (utxo.Remaining.gte(tx.Remaining)) {
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return createDisposition(tx, utxo, tx.Remaining, st)
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} else {
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return createDisposition(tx, utxo, utxo.Remaining, st)
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}
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}
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txs.forEach((tx, i) => {
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if (tx.Received) return handleBuy(tx, i)
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tx.Remaining = new BN(tx.Sent)
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return consumeUtxos(tx)
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})
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let balances = utxos.reduce((prev, curr) => {
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const asset = curr.Asset
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if (prev[asset]) {
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prev[asset] = prev[asset].plus(curr.Remaining)
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} else {
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prev[asset] = curr.Remaining
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}
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return prev
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}, {})
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utxos = utxos.map(u => ({
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...u,
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Remaining: u.Remaining.toFixed(8),
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}))
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balances = Object.keys(balances)
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.filter(asset => !balances[asset].isZero())
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.map(asset => ({
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Asset: asset,
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balance: balances[asset].toFixed(8)
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}))
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converter.json2csv(dispositions).then(csv =>
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fs.appendFileSync(`./dispositions.csv`, csv)
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)
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converter.json2csv(balances).then(csv =>
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fs.appendFileSync(`./balances.csv`, csv)
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)
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converter.json2csv(utxos).then(csv =>
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fs.appendFileSync(`./utxos.csv`, csv)
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)
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// **** 8949 ****
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const getDate = (date) => {
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const dateObj = new Date(date)
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const month = dateObj.getMonth() + 1
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const day = dateObj.getDate()
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const year = dateObj.getFullYear()
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return month + "/" + day + "/" + year;
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}
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const fillFormRows = (form, page, disposition, i) => {
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const dateAcquired = getDate(disposition.DateAcquired)
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const dateSold = getDate(disposition.Date)
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const name = `topmostSubform[0].Page${page}[0].Table_Line1[0].Row${i + 1}[0].f${page}_`
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form.getTextField(`${name}${i * 8 + 3}[0]`).setText(disposition.Asset)
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form.getTextField(`${name}${i * 8 + 4}[0]`).setText(dateAcquired)
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form.getTextField(`${name}${i * 8 + 5}[0]`).setText(dateSold)
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form.getTextField(`${name}${i * 8 + 6}[0]`).setText(disposition.Proceeds.toString())
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form.getTextField(`${name}${i * 8 + 7}[0]`).setText(disposition.CostBasis.toString())
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form.getTextField(`${name}${i * 8 + 10}[0]`).setText(disposition.GainLoss.toString())
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}
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const fillFormTotals = (form, page, proceeds, basis) => {
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form.getTextField(`topmostSubform[0].Page${page}[0].f${page}_115[0]`).setText(proceeds.toFixed(2))
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form.getTextField(`topmostSubform[0].Page${page}[0].f${page}_116[0]`).setText(basis.toFixed(2))
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form.getTextField(`topmostSubform[0].Page${page}[0].f${page}_119[0]`).setText(proceeds.minus(basis).toFixed(2))
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}
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const createPDF = async () => {
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const pdfDoc = await PDFDocument.create()
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const stDispositions = dispositions.filter(d => d.ShortTerm)
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const ltDispositions = dispositions.filter(d => !d.ShortTerm)
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const maxTxs = Math.max(stDispositions.length, ltDispositions.length)
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const numPages = Math.ceil(maxTxs / 14)
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for (let i = 0; i < numPages; i++) {
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const blank8949Bytes = fs.readFileSync('../2022-8949.pdf')
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const blank8949 = await PDFDocument.load(blank8949Bytes)
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const form = blank8949.getForm()
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const start = i * 14
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// short term
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const st = stDispositions.slice(start, start + 14)
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const stTotals = st.reduce((totals, d, i) => {
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fillFormRows(form, 1, d, i)
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totals.proceeds = totals.proceeds.plus(d.Proceeds)
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totals.basis = totals.basis.plus(d.CostBasis)
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return totals
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}, { proceeds: new BN(0), basis: new BN(0) })
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fillFormTotals(form, 1, stTotals.proceeds, stTotals.basis)
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// long term
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const lt = ltDispositions.slice(start, start + 14)
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const ltTotals = lt.reduce((totals, d, i) => {
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fillFormRows(form, 2, d, i)
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totals.proceeds = totals.proceeds.plus(d.Proceeds)
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totals.basis = totals.basis.plus(d.CostBasis)
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return totals
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}, { proceeds: new BN(0), basis: new BN(0) })
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fillFormTotals(form, 2, ltTotals.proceeds, ltTotals.basis)
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await blank8949.save()
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const [page1, page2] = await pdfDoc.copyPages(blank8949, [0,1])
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pdfDoc.addPage(page1)
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pdfDoc.addPage(page2)
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}
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const pdfBytes = await pdfDoc.save()
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fs.writeFileSync(`./8949.pdf`, pdfBytes)
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}
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createPDF()
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