From 8dde5aa30259e810afd5fbd7de40912e82044ed1 Mon Sep 17 00:00:00 2001
From: Stan Runge <stan@stanrunge.dev>
Date: Sat, 24 Oct 2026 13:48:01 +0000
Subject: [PATCH] money: Revolut statement importer (CSV/Excel/PDF) with
 dedupe, dry run and start-balance removal

---
 scripts/revolut-import.ts                | 337 ++++++++++++++++++++++
 src/lib/server/revolut-statement.test.ts | 103 +++++++
 src/lib/server/revolut-statement.ts      | 343 +++++++++++++++++++++++
 3 files changed, 783 insertions(+)
 create mode 100644 scripts/revolut-import.ts
 create mode 100644 src/lib/server/revolut-statement.test.ts
 create mode 100644 src/lib/server/revolut-statement.ts

diff --git a/scripts/revolut-import.ts b/scripts/revolut-import.ts
new file mode 100644
index 0000000..bbd9389
--- /dev/null
+++ b/scripts/revolut-import.ts
@@ -0,0 +1,337 @@
+// Import a Revolut statement (all-time CSV, Excel or PDF export) into one tracker account,
+// deduped against what's already there (bank-sync rows, Daisy's earlier imports, hand entries).
+//
+//   bun --env-file=$HOME/.config/money-sync.env scripts/revolut-import.ts \
+//       --file statement.csv --account Joint [options]
+//     (default)             dry run: report new rows, duplicates, conflicts, resulting balances
+//     --product Current     Revolut sub-account to import (Savings/pockets are reported, skipped)
+//     --currency EUR        only this currency (other currency pockets are reported, skipped)
+//     --opening <euros>     PDF only: the statement's opening balance (default 0)
+//     --list                print every new row / conflict / tracker-only row
+//     --insert-conflicts    also insert rows that fall in the already-covered period but match nothing
+//     --insert-conflicts-until YYYY-MM-DD   same, but only conflicts up to that date (e.g. a row
+//                           the old "Start balance" had absorbed on its own date)
+//     --transfer-pattern <regex>   statement rows of type Transfer whose description matches get
+//                           category 'transfer' (e.g. Personal <-> Joint legs)
+//     --tag-matched-transfers      with --transfer-pattern: also set category 'transfer' on the
+//                           existing tracker rows those statement rows matched
+//     --apply               write (needs a money-schema backup in ~/backups from the last 2 hours)
+//     --drop-start-balance  with --apply: delete the account's "Start balance" row(s), only if the
+//                           statement opens at €0 and, after the import, the only difference
+//                           to the synced bank balance is the tracker-only rows (hand entries
+//                           the bank doesn't have). The sync's balance-adjustment row is then
+//                           set to that difference (removed when €0), so the total stays equal
+//                           to the bank balance.
+//
+// Matching: same amount, date within ±2 days (booking or started date), closest first,
+// description overlap as tie-breaker. Inserted rows get source 'csv' and a stable
+// external_id 'revolut-stmt:<hash>', so re-running never duplicates.
+import { createHash } from 'node:crypto';
+import { readFileSync, readdirSync, statSync } from 'node:fs';
+import { execFileSync } from 'node:child_process';
+import { homedir } from 'node:os';
+import postgres from 'postgres';
+import {
+	checkBalances,
+	parseRevolutCsv,
+	parseRevolutPdfLines,
+	planImport,
+	rowsFromTable,
+	selectRows,
+	statementExternalId,
+	type StatementRow,
+	type TrackerRow
+} from '../src/lib/server/revolut-statement';
+import { BALANCE_ADJUSTMENT_ID, isOpeningBalance } from '../src/lib/server/bank-sync';
+
+const args = process.argv.slice(2);
+const value = (name: string) => {
+	const i = args.indexOf(name);
+	return i >= 0 ? args[i + 1] : undefined;
+};
+const flag = (name: string) => args.includes(name);
+const file = value('--file');
+const accountName = value('--account');
+if (!file || !accountName)
+	throw new Error('usage: --file <statement> --account <tracker account name>');
+if (!process.env.DB_URL) throw new Error('DB_URL is not set');
+const apply = flag('--apply');
+const euro = (c: number | null | undefined) => (c == null ? '—' : `€${(c / 100).toFixed(2)}`);
+
+function xlsxTable(path: string): string[][] {
+	const read = (entry: string) => {
+		try {
+			return execFileSync('unzip', ['-p', path, entry], { maxBuffer: 1 << 28 }).toString('utf8');
+		} catch {
+			return '';
+		}
+	};
+	const unxml = (s: string) =>
+		s
+			.replace(/&lt;/g, '<')
+			.replace(/&gt;/g, '>')
+			.replace(/&quot;/g, '"')
+			.replace(/&apos;/g, "'")
+			.replace(/&amp;/g, '&');
+	const shared = [...read('xl/sharedStrings.xml').matchAll(/<si>([\s\S]*?)<\/si>/g)].map((m) =>
+		unxml([...m[1].matchAll(/<t[^>]*>([\s\S]*?)<\/t>/g)].map((t) => t[1]).join(''))
+	);
+	const sheet = read('xl/worksheets/sheet1.xml');
+	const colIndex = (ref: string) =>
+		[...ref.replace(/\d+/g, '')].reduce((n, ch) => n * 26 + ch.charCodeAt(0) - 64, 0) - 1;
+	return [...sheet.matchAll(/<row[^>]*>([\s\S]*?)<\/row>/g)].map((row) => {
+		const cells: string[] = [];
+		for (const c of row[1].matchAll(/<c r="([A-Z]+\d+)"([^>]*?)(?:\/>|>([\s\S]*?)<\/c>)/g)) {
+			const type = c[2].match(/t="(\w+)"/)?.[1];
+			const v =
+				c[3]?.match(/<v>([\s\S]*?)<\/v>/)?.[1] ?? c[3]?.match(/<t[^>]*>([\s\S]*?)<\/t>/)?.[1] ?? '';
+			cells[colIndex(c[1])] = type === 's' ? (shared[Number(v)] ?? '') : unxml(v);
+		}
+		return Array.from(cells, (x) => x ?? '');
+	});
+}
+
+async function pdfLines(path: string): Promise<string[]> {
+	const pdfjs = await import('pdfjs-dist/legacy/build/pdf.mjs');
+	const doc = await pdfjs.getDocument({ data: new Uint8Array(readFileSync(path)) }).promise;
+	const lines: string[] = [];
+	for (let p = 1; p <= doc.numPages; p++) {
+		const content = await (await doc.getPage(p)).getTextContent();
+		const byY = new Map<number, { x: number; s: string }[]>();
+		for (const item of content.items as { str: string; transform: number[] }[]) {
+			const y = Math.round(item.transform[5]);
+			byY.set(y, [...(byY.get(y) ?? []), { x: item.transform[4], s: item.str }]);
+		}
+		for (const y of [...byY.keys()].sort((a, b) => b - a))
+			lines.push(
+				byY
+					.get(y)!
+					.sort((a, b) => a.x - b.x)
+					.map((i) => i.s)
+					.join(' ')
+			);
+	}
+	return lines;
+}
+
+function loadStatement(path: string): StatementRow[] {
+	const lower = path.toLowerCase();
+	if (lower.endsWith('.xlsx')) return rowsFromTable(xlsxTable(path));
+	if (lower.endsWith('.csv') || lower.endsWith('.txt'))
+		return parseRevolutCsv(readFileSync(path, 'utf8'));
+	throw new Error('Use .csv, .xlsx or .pdf');
+}
+
+const all = file.toLowerCase().endsWith('.pdf')
+	? parseRevolutPdfLines(await pdfLines(file), Math.round(Number(value('--opening') ?? 0) * 100))
+	: loadStatement(file);
+const { kept, skipped } = selectRows(
+	all,
+	value('--product') ?? 'Current',
+	value('--currency') ?? 'EUR'
+);
+// Chronological by booking date; file order breaks ties (it follows the running balance).
+const rows = kept.slice().sort((a, b) => a.date.localeCompare(b.date) || a.line - b.line);
+const balances = checkBalances(kept);
+
+const sql = postgres(process.env.DB_URL, { max: 2, connect_timeout: 10, onnotice: () => {} });
+try {
+	const [account] = await sql<
+		{
+			id: number;
+			user_id: string;
+			name: string;
+			opening_balance_cents: number;
+			bank_balance_cents: number | null;
+			bank_balance_at: Date | null;
+		}[]
+	>`select id, user_id, name, opening_balance_cents, bank_balance_cents, bank_balance_at
+		from money.accounts where lower(name) = lower(${accountName})`;
+	if (!account) throw new Error(`No tracker account named ${accountName}`);
+	const existing = await sql<
+		{
+			id: number;
+			date: string;
+			amount_cents: number;
+			description: string;
+			source: string;
+			external_id: string | null;
+			text: string;
+		}[]
+	>`select id, date::text, amount_cents, description, source, external_id,
+			concat_ws(' ', description, counterparty, raw->'creditor'->>'name', raw->'debtor'->>'name',
+				raw->>'remittance_information', raw->'revolut'->>'description') as text
+		from money.transactions where account_id = ${account.id} order by date, id`;
+	const startRows = existing.filter(
+		(t) => isOpeningBalance(t.description) && t.source === 'manual'
+	);
+	const adjustment = existing.find((t) => t.external_id === BALANCE_ADJUSTMENT_ID);
+	const tracker: TrackerRow[] = existing
+		.filter((t) => !startRows.includes(t) && t !== adjustment)
+		.map((t) => ({
+			id: t.id,
+			date: t.date,
+			amountCents: t.amount_cents,
+			description: t.description,
+			text: t.text,
+			source: t.source,
+			externalId: t.external_id
+		}));
+	const plan = planImport(rows, tracker);
+	const conflictsUntil = value('--insert-conflicts-until');
+	const toInsert = flag('--insert-conflicts')
+		? [...plan.fresh, ...plan.conflicts]
+		: conflictsUntil
+			? [...plan.fresh, ...plan.conflicts.filter((r) => r.date <= conflictsUntil)]
+			: plan.fresh;
+	const transferRe = value('--transfer-pattern')
+		? new RegExp(value('--transfer-pattern')!, 'i')
+		: null;
+	const isTransfer = (r: StatementRow) =>
+		!!transferRe && /transfer/i.test(r.type) && transferRe.test(r.description);
+
+	const today = new Date().toISOString().slice(0, 10);
+	const sum = (xs: { amountCents: number; date: string }[]) =>
+		xs.filter((x) => x.date <= today).reduce((s, x) => s + x.amountCents, 0);
+	const trackedNow =
+		account.opening_balance_cents +
+		sum(tracker) +
+		sum(startRows.map((t) => ({ amountCents: t.amount_cents, date: t.date }))) +
+		(adjustment?.amount_cents ?? 0);
+	const afterNoStart = account.opening_balance_cents + sum(tracker) + sum(toInsert);
+	const bank = account.bank_balance_cents;
+	const residual = bank == null ? null : bank - afterNoStart;
+	const trackerOnlyCents = sum(plan.trackerOnly);
+	const dropOk = balances.openingCents === 0 && residual !== null && residual === -trackerOnlyCents;
+	const boundary = plan.coverageFrom
+		? (rows.filter((r) => r.date < plan.coverageFrom! && r.balanceCents != null).at(-1)
+				?.balanceCents ?? 0)
+		: null;
+
+	console.log(
+		`Statement ${file}: ${all.length} rows; importing ${account.name} = ${value('--product') ?? 'Current'} ${value('--currency') ?? 'EUR'}: ${kept.length} completed rows ${rows[0]?.date ?? ''}..${rows.at(-1)?.date ?? ''}`
+	);
+	const skippedBy = new Map<string, { n: number; cents: number }>();
+	for (const r of skipped) {
+		const key = `${r.product}/${r.currency}/${r.state}`;
+		const e = skippedBy.get(key) ?? { n: 0, cents: 0 };
+		skippedBy.set(key, { n: e.n + 1, cents: e.cents + r.amountCents });
+	}
+	for (const [k, v] of skippedBy) console.log(`  skipped ${k}: ${v.n} rows (net ${euro(v.cents)})`);
+	console.log(
+		`  statement opening ${euro(balances.openingCents)}, closing ${euro(balances.closingCents)}, running-balance breaks ${balances.breaks.length}`
+	);
+	console.log(
+		`Tracker ${account.name} (#${account.id}): ${tracker.length} rows from ${plan.coverageFrom ?? '-'}; start balance rows ${startRows.map((t) => `#${t.id} ${t.date} ${euro(t.amount_cents)}`).join(', ') || 'none'}; adjustment ${euro(adjustment?.amount_cents)}`
+	);
+	console.log(
+		`  statement balance just before ${plan.coverageFrom}: ${euro(boundary)} (tracker start + adjustment: ${euro(sum(startRows.map((t) => ({ amountCents: t.amount_cents, date: t.date }))) + (adjustment?.amount_cents ?? 0))})`
+	);
+	console.log(
+		`Plan: new ${plan.fresh.length} (${euro(sum(plan.fresh))}), duplicates ${plan.duplicates.length} (${plan.duplicates.filter((d) => !d.descMatch).length} with differing description), conflicts ${plan.conflicts.length} (${euro(sum(plan.conflicts))}), tracker-only ${plan.trackerOnly.length} (${euro(sum(plan.trackerOnly))})`
+	);
+	console.log(
+		`Balances: bank ${euro(bank)} (synced ${account.bank_balance_at?.toISOString() ?? 'never'}), tracker now ${euro(trackedNow)}, after import without start balance/adjustment ${euro(afterNoStart)}, gap ${euro(residual)}${residual !== null && residual === -trackerOnlyCents ? ' = tracker-only rows, OK to drop the start balance' : ` (tracker-only rows ${euro(trackerOnlyCents)}; start balance must stay)`}${transferRe ? `; transfers matching pattern: ${rows.filter(isTransfer).length}` : ''}`
+	);
+	if (flag('--list') || !apply) {
+		const show = (
+			label: string,
+			xs: {
+				date: string;
+				amountCents: number;
+				description: string;
+				id?: number;
+				source?: string;
+			}[],
+			limit: number
+		) => {
+			if (!xs.length) return;
+			console.log(`  ${label}:`);
+			for (const x of xs.slice(0, flag('--list') ? Infinity : limit))
+				console.log(
+					`    ${x.date} ${euro(x.amountCents).padStart(10)} ${x.description}${x.id ? ` (#${x.id} ${x.source})` : ''}`
+				);
+			if (!flag('--list') && xs.length > limit)
+				console.log(`    … ${xs.length - limit} more (--list)`);
+		};
+		show('conflicts (statement only, in covered period)', plan.conflicts, 30);
+		show('tracker-only rows (covered period, no statement row)', plan.trackerOnly, 30);
+		show(
+			'duplicates with differing description',
+			plan.duplicates
+				.filter((d) => !d.descMatch)
+				.map((d) => ({
+					...d.row,
+					description: `${d.row.description}  ==  ${d.match.description}`
+				})),
+			10
+		);
+		show('new rows', plan.fresh, 5);
+	}
+	if (!apply) {
+		console.log('Dry run: nothing written. Re-run with --apply (after a backup) to import.');
+	} else {
+		const dir = `${homedir()}/backups`;
+		const fresh = readdirSync(dir).some(
+			(f) =>
+				f.startsWith('money-before-') &&
+				f.endsWith('.dump') &&
+				Date.now() - statSync(`${dir}/${f}`).mtimeMs < 2 * 3600_000
+		);
+		if (!fresh)
+			throw new Error(`No money-before-*.dump in ${dir} from the last 2 hours; back up first`);
+		const drop = flag('--drop-start-balance');
+		if (drop && !dropOk)
+			throw new Error(
+				`Refusing --drop-start-balance: statement opening ${euro(balances.openingCents)}, gap ${euro(residual)} vs tracker-only rows ${euro(trackerOnlyCents)}`
+			);
+		const hash = (s: string) => createHash('sha256').update(s).digest('hex');
+		await sql.begin(async (q) => {
+			let inserted = 0;
+			for (const r of toInsert) {
+				const res = await q`
+					insert into money.transactions
+						(user_id, account_id, date, value_date, description, amount_cents, external_id, source, booking_status, category, raw)
+					values (${account.user_id}, ${account.id}, ${r.date}, ${r.startedDate}, ${r.description.slice(0, 500)},
+						${r.amountCents}, ${statementExternalId(r, hash)}, 'csv', 'BOOK', ${isTransfer(r) ? 'transfer' : null},
+						${q.json({ revolut: { type: r.type, product: r.product, started: r.startedDate, completed: r.completedAt, description: r.description, fee_cents: r.feeCents, currency: r.currency, balance_cents: r.balanceCents, file_line: r.line } })})
+					on conflict do nothing`;
+				inserted += res.count;
+			}
+			console.log(`Inserted ${inserted} rows into ${account.name}.`);
+			if (transferRe && flag('--tag-matched-transfers')) {
+				const ids = plan.duplicates.filter((d) => isTransfer(d.row)).map((d) => d.match.id);
+				const tagged = ids.length
+					? await q`update money.transactions set category = 'transfer'
+						where account_id = ${account.id} and id in ${q(ids)} and category is distinct from 'transfer'`
+					: { count: 0 };
+				console.log(`Tagged ${tagged.count} existing transfer rows.`);
+			}
+			if (drop) {
+				for (const t of startRows)
+					await q`delete from money.transactions where id = ${t.id} and account_id = ${account.id}`;
+				const needed = residual!;
+				if (adjustment && needed === 0)
+					await q`delete from money.transactions where id = ${adjustment.id}`;
+				else if (adjustment)
+					await q`update money.transactions set amount_cents = ${needed} where id = ${adjustment.id}`;
+				else if (needed !== 0)
+					await q`insert into money.transactions
+						(user_id, account_id, date, description, amount_cents, external_id, source, booking_status)
+						values (${account.user_id}, ${account.id}, ${plan.coverageFrom ?? rows[0].date}, 'Bank balance adjustment',
+							${needed}, ${BALANCE_ADJUSTMENT_ID}, 'enablebanking', 'ADJ')`;
+				const [check] = await q<{ total: number }[]>`
+					select (a.opening_balance_cents + coalesce(sum(t.amount_cents) filter (where t.date <= ${today}), 0))::int as total
+					from money.accounts a left join money.transactions t on t.account_id = a.id
+					where a.id = ${account.id} group by a.id`;
+				if (bank != null && check.total !== bank)
+					throw new Error(`Total would be ${euro(check.total)}, bank ${euro(bank)}; rolled back`);
+				console.log(
+					`Removed start balance ${startRows.map((t) => '#' + t.id).join(', ') || '-'}; adjustment ${euro(adjustment?.amount_cents)} -> ${euro(needed)}; total ${euro(check.total)} = bank.`
+				);
+			}
+		});
+	}
+} finally {
+	await sql.end();
+}
diff --git a/src/lib/server/revolut-statement.test.ts b/src/lib/server/revolut-statement.test.ts
new file mode 100644
index 0000000..3b9fc34
--- /dev/null
+++ b/src/lib/server/revolut-statement.test.ts
@@ -0,0 +1,103 @@
+import { describe, expect, it } from 'vitest';
+import {
+	checkBalances,
+	parseAmount,
+	parseRevolutCsv,
+	parseRevolutPdfLines,
+	planImport,
+	selectRows,
+	type TrackerRow
+} from './revolut-statement';
+
+const CSV = `Type,Product,Started Date,Completed Date,Description,Amount,Fee,Currency,State,Balance
+Transfer,Current,2024-06-30 15:09:04,2024-06-30 15:09:04,Transfer from STAN RUNGE,100.00,0.00,EUR,COMPLETED,100.00
+Card Payment,Current,2024-07-01 19:12:32,2024-07-02 13:57:17,"Wok, Baldakijn",-72.10,0.00,EUR,COMPLETED,27.90
+Card Payment,Current,2024-07-03 10:00:00,,Shop,-5.00,0.00,EUR,REVERTED,
+Exchange,Current,2024-07-04 10:00:00,2024-07-04 10:00:01,Exchanged to USD,-10.00,0.20,EUR,COMPLETED,17.70
+Exchange,Current,2024-07-04 10:00:00,2024-07-04 10:00:01,Exchanged from EUR,10.80,0.00,USD,COMPLETED,10.80
+CASHBACK,Savings,2024-08-09 18:56:54,2024-08-10 08:42:12,Plan Cashback,0.01,0.00,EUR,COMPLETED,0.01
+Card Payment,Current,2025-08-02 10:00:00,2025-08-03 09:00:00,Albert Heijn 1234,-12.34,0.00,EUR,COMPLETED,5.36
+Card Payment,Current,2025-08-05 10:00:00,2025-08-05 11:00:00,Kiosk,-3.50,0.00,EUR,COMPLETED,1.86
+`;
+
+describe('revolut statement', () => {
+	it('parses amounts in both notations', () => {
+		expect(parseAmount('1,234.56')).toBe(123456);
+		expect(parseAmount('-1.234,56')).toBe(-123456);
+		expect(parseAmount('€ 12,50')).toBe(1250);
+		expect(parseAmount('')).toBeNull();
+	});
+
+	it('parses the CSV export, nets fees and keeps only completed Current EUR rows', () => {
+		const rows = parseRevolutCsv(CSV);
+		expect(rows).toHaveLength(8);
+		expect(rows[1]).toMatchObject({
+			date: '2024-07-02',
+			startedDate: '2024-07-01',
+			description: 'Wok, Baldakijn',
+			amountCents: -7210
+		});
+		const { kept, skipped } = selectRows(rows);
+		expect(kept.map((r) => r.amountCents)).toEqual([10000, -7210, -1020, -1234, -350]);
+		expect(skipped.map((r) => `${r.product}/${r.currency}/${r.state}`)).toEqual([
+			'Current/EUR/REVERTED',
+			'Current/USD/COMPLETED',
+			'Savings/EUR/COMPLETED'
+		]);
+		expect(checkBalances(kept)).toMatchObject({ openingCents: 0, closingCents: 186, breaks: [] });
+	});
+
+	it('reads Dutch semicolon headers', () => {
+		const rows = parseRevolutCsv(
+			'Soort;Product;Begindatum;Datum voltooid;Beschrijving;Bedrag;Kosten;Valuta;Status;Saldo\nKaartbetaling;Current;2024-01-02 10:00:00;2024-01-03 10:00:00;Jumbo;-3,50;0,00;EUR;VOLTOOID;10,00\n'
+		);
+		expect(rows[0]).toMatchObject({ date: '2024-01-03', amountCents: -350, balanceCents: 1000 });
+	});
+
+	it('parses PDF statement lines using the running balance for direction', () => {
+		const rows = parseRevolutPdfLines([
+			'EUR Statement',
+			'30 Jun 2024 Transfer from STAN RUNGE €100.00 €100.00',
+			'Jul 2, 2024 Wok Van Baldakijn €72.10 €27.90',
+			'2 jul. 2024 Something €1.234,00 €1.261,90',
+			'Balance summary €0.00 €27.90'
+		]);
+		expect(rows.map((r) => [r.date, r.amountCents])).toEqual([
+			['2024-06-30', 10000],
+			['2024-07-02', -7210],
+			['2024-07-02', 123400]
+		]);
+	});
+
+	it('plans an import: duplicates within ±2 days, older unmatched rows are new, newer are conflicts', () => {
+		const { kept } = selectRows(parseRevolutCsv(CSV));
+		const tracker: TrackerRow[] = [
+			{
+				id: 1,
+				date: '2025-08-02',
+				amountCents: -1234,
+				description: 'Groceries',
+				text: 'Groceries ALBERT HEIJN 1234',
+				source: 'manual',
+				externalId: 'x'
+			},
+			{
+				id: 2,
+				date: '2025-08-04',
+				amountCents: -999,
+				description: 'Cash',
+				text: 'Cash',
+				source: 'manual',
+				externalId: null
+			}
+		];
+		const plan = planImport(kept, tracker);
+		expect(plan.coverageFrom).toBe('2025-08-02');
+		expect(plan.duplicates.map((d) => [d.row.amountCents, d.match.id, d.descMatch])).toEqual([
+			[-1234, 1, true]
+		]);
+		expect(plan.fresh.map((r) => r.amountCents)).toEqual([10000, -7210, -1020]);
+		expect(plan.conflicts.map((r) => r.amountCents)).toEqual([-350]);
+		expect(plan.trackerOnly.map((t) => t.id)).toEqual([2]);
+	});
+});
diff --git a/src/lib/server/revolut-statement.ts b/src/lib/server/revolut-statement.ts
new file mode 100644
index 0000000..702a90a
--- /dev/null
+++ b/src/lib/server/revolut-statement.ts
@@ -0,0 +1,343 @@
+// Revolut account statement parsing + import planning (pure; DB work is in scripts/revolut-import.ts).
+// Handles the app's CSV export (English or Dutch headers, , or ; separated), the Excel export
+// (rows passed in as a string table) and, defensively, the text of the PDF statement.
+
+export type StatementRow = {
+	/** Booking date (completed date, else started date), YYYY-MM-DD. */
+	date: string;
+	startedDate: string;
+	completedAt: string;
+	type: string;
+	product: string;
+	description: string;
+	/** Net balance change: amount minus fee. */
+	amountCents: number;
+	feeCents: number;
+	currency: string;
+	state: string;
+	balanceCents: number | null;
+	/** Position in the file, for stable ordering. */
+	line: number;
+};
+
+const HEADERS: Record<string, string[]> = {
+	type: ['type', 'soort'],
+	product: ['product'],
+	started: ['started date', 'begindatum', 'startdatum', 'datum gestart'],
+	completed: ['completed date', 'datum voltooid', 'voltooid', 'einddatum'],
+	description: ['description', 'beschrijving', 'omschrijving'],
+	amount: ['amount', 'bedrag'],
+	fee: ['fee', 'kosten', 'vergoeding'],
+	currency: ['currency', 'valuta'],
+	state: ['state', 'status'],
+	balance: ['balance', 'saldo']
+};
+
+/** Parses "1,234.56", "-1.234,56", "€ 12,50", "1234" into cents. */
+export function parseAmount(raw: string | undefined | null): number | null {
+	if (raw == null) return null;
+	let s = String(raw)
+		.replace(/[€$£\s\u00a0]|EUR|USD/g, '')
+		.replace(/^\((.*)\)$/, '-$1')
+		.replace(/[−–]/g, '-');
+	if (!s || s === '-') return null;
+	const lastComma = s.lastIndexOf(',');
+	const lastDot = s.lastIndexOf('.');
+	if (lastComma > lastDot) s = s.replace(/\./g, '').replace(',', '.');
+	else s = s.replace(/,/g, '');
+	if (!/^[-+]?\d+(\.\d+)?$/.test(s)) return null;
+	return Math.round(Number(s) * 100);
+}
+
+/** RFC 4180-ish CSV parser; detects , or ; from the header line. */
+export function parseCsv(text: string): string[][] {
+	text = text.replace(/^\uFEFF/, '');
+	const firstLine = text.slice(0, text.indexOf('\n') >= 0 ? text.indexOf('\n') : text.length);
+	const sep =
+		(firstLine.match(/;/g)?.length ?? 0) > (firstLine.match(/,/g)?.length ?? 0) ? ';' : ',';
+	const rows: string[][] = [];
+	let row: string[] = [];
+	let field = '';
+	let quoted = false;
+	for (let i = 0; i < text.length; i++) {
+		const c = text[i];
+		if (quoted) {
+			if (c === '"' && text[i + 1] === '"') {
+				field += '"';
+				i++;
+			} else if (c === '"') quoted = false;
+			else field += c;
+		} else if (c === '"') quoted = true;
+		else if (c === sep) {
+			row.push(field);
+			field = '';
+		} else if (c === '\n' || c === '\r') {
+			if (c === '\r' && text[i + 1] === '\n') i++;
+			row.push(field);
+			if (row.some((f) => f !== '')) rows.push(row);
+			row = [];
+			field = '';
+		} else field += c;
+	}
+	row.push(field);
+	if (row.some((f) => f !== '')) rows.push(row);
+	return rows;
+}
+
+function isoDay(value: string): string {
+	const v = value.trim();
+	let m = v.match(/^(\d{4})-(\d{2})-(\d{2})/);
+	if (m) return `${m[1]}-${m[2]}-${m[3]}`;
+	m = v.match(/^(\d{1,2})[-/.](\d{1,2})[-/.](\d{4})/);
+	if (m) return `${m[3]}-${m[2].padStart(2, '0')}-${m[1].padStart(2, '0')}`;
+	// Excel serial day number
+	if (/^\d{5}(\.\d+)?$/.test(v)) {
+		const d = new Date(Math.round((Number(v) - 25569) * 86400) * 1000);
+		return d.toISOString().slice(0, 10);
+	}
+	return '';
+}
+
+/** Turns a header + rows table (CSV or Excel) into statement rows. */
+export function rowsFromTable(table: string[][]): StatementRow[] {
+	const header = (table[0] ?? []).map((h) => h.trim().toLowerCase());
+	const col = (key: string) => header.findIndex((h) => HEADERS[key].includes(h));
+	const idx = Object.fromEntries(Object.keys(HEADERS).map((k) => [k, col(k)]));
+	for (const key of ['started', 'description', 'amount'])
+		if (idx[key] < 0) throw new Error(`Not a Revolut statement: no "${HEADERS[key][0]}" column`);
+	const get = (r: string[], key: string) => (idx[key] >= 0 ? (r[idx[key]] ?? '').trim() : '');
+	return table.slice(1).flatMap((r, i) => {
+		const amount = parseAmount(get(r, 'amount'));
+		const started = isoDay(get(r, 'started'));
+		if (amount == null || !started) return [];
+		const fee = parseAmount(get(r, 'fee')) ?? 0;
+		const completedAt = get(r, 'completed');
+		return [
+			{
+				date: isoDay(completedAt) || started,
+				startedDate: started,
+				completedAt,
+				type: get(r, 'type'),
+				product: get(r, 'product') || 'Current',
+				description: get(r, 'description'),
+				amountCents: amount - fee,
+				feeCents: fee,
+				currency: (get(r, 'currency') || 'EUR').toUpperCase(),
+				state: (get(r, 'state') || 'COMPLETED').toUpperCase(),
+				balanceCents: parseAmount(get(r, 'balance')),
+				line: i + 2
+			}
+		];
+	});
+}
+
+export function parseRevolutCsv(text: string): StatementRow[] {
+	return rowsFromTable(parseCsv(text));
+}
+
+const MONTHS: Record<string, number> = {
+	jan: 1,
+	feb: 2,
+	mar: 3,
+	mrt: 3,
+	apr: 4,
+	may: 5,
+	mei: 5,
+	jun: 6,
+	jul: 7,
+	aug: 8,
+	sep: 9,
+	oct: 10,
+	okt: 10,
+	nov: 11,
+	dec: 12
+};
+const PDF_DATE =
+	/^(?:(\d{1,2})\s+([a-z]{3})[a-z]*\.?\s+(\d{4})|([a-z]{3})[a-z]*\.?\s+(\d{1,2}),?\s+(\d{4}))\s+/i;
+const MONEY = /[-−]?€\s?[\d.,]+|[-−]?[\d.,]+\s?€/g;
+
+/**
+ * Best-effort parser for the text lines of a Revolut PDF statement ("Date Description
+ * Money out Money in Balance"). In/out is taken from the balance change, so every
+ * transaction line must end in its running balance; `openingCents` is the statement's
+ * opening balance (0 for an all-time statement).
+ */
+export function parseRevolutPdfLines(lines: string[], openingCents = 0): StatementRow[] {
+	const out: StatementRow[] = [];
+	let balance = openingCents;
+	lines.forEach((raw, i) => {
+		const line = raw.replace(/\s+/g, ' ').trim();
+		const m = line.match(PDF_DATE);
+		if (!m) return;
+		const day = Number(m[1] ?? m[5]);
+		const month = MONTHS[(m[2] ?? m[4]).toLowerCase()];
+		const year = Number(m[3] ?? m[6]);
+		if (!month || !day) return;
+		const rest = line.slice(m[0].length);
+		const money = rest.match(MONEY);
+		if (!money || money.length < 2) return;
+		const next = parseAmount(money.at(-1)!.replace('−', '-'));
+		const amount = parseAmount(money.at(-2)!.replace('−', '-'));
+		if (next == null || amount == null) return;
+		const description = rest.slice(0, rest.indexOf(money[0])).trim();
+		const delta = next - balance;
+		if (Math.abs(delta) !== Math.abs(amount)) return; // not a transaction line (or out of order)
+		const date = `${year}-${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}`;
+		out.push({
+			date,
+			startedDate: date,
+			completedAt: date,
+			type: '',
+			product: 'Current',
+			description,
+			amountCents: delta,
+			feeCents: 0,
+			currency: 'EUR',
+			state: 'COMPLETED',
+			balanceCents: next,
+			line: i + 1
+		});
+		balance = next;
+	});
+	return out;
+}
+
+/** Rows that move money in the selected sub-account (completed only, one product + currency). */
+export function selectRows(rows: StatementRow[], product = 'Current', currency = 'EUR') {
+	const kept = rows.filter(
+		(r) =>
+			r.state === 'COMPLETED' &&
+			r.product.toLowerCase() === product.toLowerCase() &&
+			r.currency === currency
+	);
+	const skipped = rows.filter((r) => !kept.includes(r));
+	return { kept, skipped };
+}
+
+/** Checks the running balance column; returns the balance before the first row. */
+export function checkBalances(rows: StatementRow[]) {
+	const breaks: StatementRow[] = [];
+	let prev: number | null = null;
+	for (const r of rows) {
+		if (r.balanceCents == null) continue;
+		if (prev != null && prev + r.amountCents !== r.balanceCents) breaks.push(r);
+		prev = r.balanceCents;
+	}
+	const first = rows.find((r) => r.balanceCents != null);
+	return {
+		openingCents: first ? first.balanceCents! - first.amountCents : null,
+		closingCents: prev,
+		breaks
+	};
+}
+
+export type TrackerRow = {
+	id: number;
+	date: string;
+	amountCents: number;
+	description: string;
+	/** Description, counterparty and raw bank names/remittance, for matching. */
+	text: string;
+	source: string;
+	externalId: string | null;
+};
+
+const STOP = new Set([
+	'transfer',
+	'from',
+	'to',
+	'payment',
+	'the',
+	'and',
+	'van',
+	'naar',
+	'aan',
+	'bv',
+	'b.v',
+	'eur'
+]);
+export function words(text: string) {
+	return new Set(
+		text
+			.toLowerCase()
+			.normalize('NFKD')
+			.replace(/[^a-z0-9 ]+/g, ' ')
+			.split(/\s+/)
+			.filter((w) => w.length > 2 && !STOP.has(w))
+	);
+}
+
+function days(a: string, b: string) {
+	return Math.abs(Date.parse(a + 'T00:00:00Z') - Date.parse(b + 'T00:00:00Z')) / 86_400_000;
+}
+
+export type ImportPlan = {
+	coverageFrom: string | null;
+	fresh: StatementRow[];
+	duplicates: { row: StatementRow; match: TrackerRow; descMatch: boolean }[];
+	/** In the period the tracker already covers, but no tracker row matches. */
+	conflicts: StatementRow[];
+	/** Tracker rows in the covered period that no statement row matched. */
+	trackerOnly: TrackerRow[];
+};
+
+/**
+ * Matches statement rows to tracker rows: same amount, booking or started date within
+ * `maxDays`, closest date first, description overlap breaking ties. Unmatched statement
+ * rows before the tracker's first real row are new; unmatched ones after it are conflicts.
+ */
+export function planImport(
+	rows: StatementRow[],
+	tracker: TrackerRow[],
+	{ maxDays = 2, coverageFrom }: { maxDays?: number; coverageFrom?: string | null } = {}
+): ImportPlan {
+	const from = coverageFrom ?? tracker.map((t) => t.date).sort()[0] ?? null;
+	const trackerWords = new Map(tracker.map((t) => [t.id, words(t.text)]));
+	const pairs: { r: number; t: TrackerRow; score: number; desc: boolean }[] = [];
+	const byAmount = new Map<number, TrackerRow[]>();
+	for (const t of tracker) byAmount.set(t.amountCents, [...(byAmount.get(t.amountCents) ?? []), t]);
+	rows.forEach((row, r) => {
+		const w = words(row.description);
+		for (const t of byAmount.get(row.amountCents) ?? []) {
+			const diff = Math.min(days(row.date, t.date), days(row.startedDate, t.date));
+			if (diff > maxDays) continue;
+			const tw = trackerWords.get(t.id)!;
+			const desc = [...w].some((x) => tw.has(x));
+			pairs.push({ r, t, score: diff * 10 - (desc ? 5 : 0) + days(row.date, t.date) * 0.1, desc });
+		}
+	});
+	pairs.sort((a, b) => a.score - b.score || a.r - b.r || a.t.id - b.t.id);
+	const usedRows = new Set<number>();
+	const usedTracker = new Set<number>();
+	const duplicates: ImportPlan['duplicates'] = [];
+	for (const p of pairs) {
+		if (usedRows.has(p.r) || usedTracker.has(p.t.id)) continue;
+		usedRows.add(p.r);
+		usedTracker.add(p.t.id);
+		duplicates.push({ row: rows[p.r], match: p.t, descMatch: p.desc });
+	}
+	const unmatched = rows.filter((_, i) => !usedRows.has(i));
+	return {
+		coverageFrom: from,
+		fresh: unmatched.filter((r) => !from || r.date < from),
+		duplicates,
+		conflicts: unmatched.filter((r) => from && r.date >= from),
+		trackerOnly: tracker.filter((t) => !usedTracker.has(t.id) && (!from || t.date >= from))
+	};
+}
+
+/** Stable id so re-running an import never inserts a row twice. */
+export function statementExternalId(row: StatementRow, hash: (s: string) => string) {
+	return (
+		'revolut-stmt:' +
+		hash(
+			[
+				row.completedAt || row.startedDate,
+				row.startedDate,
+				row.amountCents,
+				row.description,
+				row.balanceCents ?? ''
+			].join('|')
+		).slice(0, 24)
+	);
+}