What is an atomic swap between Bitcoin and Monero?

An atomic swap is a trustless, peer-to-peer exchange of one cryptocurrency for another without any intermediary (no exchange, no escrow agent). Either both parties receive their coins, or neither does — there is no way for one side to cheat. For BTC↔XMR swaps, this is achieved through cryptographic protocols (adaptor signatures, hash time-locked contracts) that enforce atomicity across two different blockchains. The swap completes in 10-60 minutes depending on confirmation times.

Which tools can I use for BTC↔XMR atomic swaps?

Three main options in 2026: (1) Farcaster — actively maintained, supports Lightning Network for faster swaps (10-15 min), GUI available, most user-friendly. (2) BasicSwapDEX — fully decentralized orderbook, supports BTC/LTC/DASH/FIRO/PIVX↔XMR, zero fees (only network tx fees), 30-60 min settlement. (3) COMIT (legacy) — the original BTC↔XMR protocol by CoBloX, community-maintained since the original team stopped. Use Farcaster for the best experience.

How long does a BTC to XMR atomic swap take?

Farcaster with Lightning: 10-15 minutes. Farcaster on-chain BTC: 30-60 minutes (depends on Bitcoin block confirmations). BasicSwapDEX: 30-60 minutes. COMIT: 30-60 minutes. The bottleneck is always Bitcoin confirmation time — Monero confirms in ~2 minutes, but Bitcoin needs 1-3 confirmations (10-30 min). Lightning Network swaps are fastest because BTC settlement is instant on Lightning.

Are atomic swaps truly trustless?

Yes. The cryptographic protocol guarantees that either both sides of the swap complete, or neither does. There is no point during the swap where one party holds both coins. The protocol uses adaptor signatures (not hash time-locked contracts like Lightning) — Alice locks BTC, Bob locks XMR, and the mathematical relationship between the locks ensures that claiming one side automatically reveals the key to claim the other. If either party abandons the swap, a time-lock refund returns the original coins after a timeout period (~24 hours for safety). No third party, no escrow, no trust required.

Why not just use an exchange to swap BTC for XMR?

Three reasons: (1) KYC — most exchanges require identity verification. Your BTC↔XMR swap is permanently linked to your real identity. (2) Delistings — many exchanges (Binance, OKX, Huobi) have delisted Monero. Fewer options each year. (3) Custody risk — while your coins are on the exchange, they can be frozen, seized, or stolen (FTX, Mt. Gox, Celsius). Atomic swaps eliminate all three risks: no identity, no delisting possible (it's a protocol, not a platform), and non-custodial (you hold your own keys throughout).

Monero Atomic Swaps (2026)

Swap BTC for XMR without exchanges — trustless, no KYC, no middleman

TL;DR: Atomic swaps let you trade BTC for XMR (and back) without any exchange or intermediary. Farcaster is the best tool (Lightning support, 10-15 min swaps). BasicSwapDEX for a fully decentralized orderbook. Zero fees (only network tx costs). No KYC, no custody risk, cryptographically trustless. If you need EUR ↔ XMR instead of BTC ↔ XMR, use Cash by Mail or face-to-face.

Swap Protocols Compared

Protocol	Pairs	Speed	Fees	Status (2026)
Farcaster	BTC ↔ XMR (+Lightning)	10-15 min (LN)	Network only	Active, maintained
BasicSwapDEX	BTC/LTC/DASH/FIRO ↔ XMR	30-60 min	Zero	Active
COMIT	BTC ↔ XMR	30-60 min	Network only	Community-maintained
Haveno (not atomic)	EUR/USD ↔ XMR	30 min - 2h	0.6-2%	Active (RetoSwap, DawnSwap)

Note: Atomic swaps are crypto-to-crypto only (BTC ↔ XMR). For fiat (EUR, USD) to XMR, use P2P trading, Cash by Mail, or face-to-face.

How Atomic Swaps Work

The core idea: either both sides of the trade complete, or neither does. No escrow, no trust, no third party.

1. Alice wants XMR, has BTC. Bob wants BTC, has XMR.

2. Alice locks her BTC in a special transaction with two spending conditions: (a) Bob can claim it with a secret key, or (b) Alice can refund after a timeout (~24h).

3. Bob locks his XMR in a similar transaction, linked to Alice's lock via adaptor signatures.

4. Bob claims Alice's BTC. The act of claiming reveals the secret key that allows Alice to claim Bob's XMR.

5. Alice claims Bob's XMR. Done. Both sides received their coins. If Bob never claims, both locks time out and coins are refunded.

The mathematical relationship between the locks (adaptor signatures) makes it cryptographically impossible for one side to cheat. This is fundamentally different from centralized exchanges where you must trust the operator.

Farcaster (Recommended)

Farcaster is the most actively maintained BTC ↔ XMR atomic swap implementation. Key features:

Lightning Network support: Swaps settle in 10-15 minutes instead of 30-60 minutes. BTC moves via Lightning (instant), XMR confirms on-chain (~2 min for 1 confirmation).

GUI available: Desktop application for Windows, macOS, Linux. No command line needed.

Actively developed: Regular releases, active Discord community.

Limitations: BTC ↔ XMR only (no LTC, DASH, etc.). Requires running a Monero node (or connecting to a remote one).

BasicSwapDEX

BasicSwapDEX is a fully decentralized exchange with its own orderbook. Multiple trading pairs:

BTC ↔ XMR, LTC ↔ XMR, DASH ↔ XMR, FIRO ↔ XMR, PIVX ↔ XMR.

Zero fees (only network transaction fees). Non-custodial throughout.

Limitations: Slower settlement (30-60 min). Lower liquidity than Farcaster. Requires running the BasicSwap daemon locally.

When to Use What

Scenario	Best Option
I have BTC, want XMR quickly	Farcaster (Lightning, 10-15 min)
I have LTC/DASH, want XMR	BasicSwapDEX (multi-pair)
I have EUR cash, want XMR	Cash by Mail or F2F
I have EUR in bank, want XMR	Haveno (RetoSwap/DawnSwap)
I have XMR, want BTC	Farcaster or BasicSwapDEX
I have XMR, want EUR cash	arnoldnakamura (Cash by Mail or F2F)

Atomic Swaps vs Exchanges

Feature	Atomic Swap	Centralized Exchange
KYC required	No	Yes (ID, selfie, proof of address)
Custody	Non-custodial	Exchange holds your coins
Can be delisted	No (it's a protocol)	Yes (Binance, OKX delisted XMR)
Can freeze funds	No	Yes (compliance, hack, insolvency)
Speed	10-60 min	Seconds (internal ledger)
Liquidity	Lower	Higher
Fiat support	No (crypto-to-crypto only)	Yes

The Future of Trading

Atomic swaps are the purest form of cryptocurrency exchange: two people, two blockchains, zero trust required. No company can be shut down. No government can delist a protocol. No hacker can steal from a decentralized swap.

For BTC ↔ XMR: use Farcaster. For EUR ↔ XMR: arnoldnakamura — 683 trades, 454 partners, 100% feedback. Cash by Mail (EU-wide) or face-to-face (SW Germany). Telegram