Best XMR Atomic Swaps and Community Services in 2026

Core Mechanics of BTC-XMR Atomic Swaps

XMR atomic swaps secure atomicity by pairing adaptor signatures on Bitcoin with combined spend keys on Monero. The Bitcoin leg employs adaptor signatures so that one party’s partial signature reveals a secret value that lets the counterparty complete their transaction. On the Monero side, the two participants derive a joint spend key; once the secret is known, either party can spend the locked funds without exposing private keys.

Because Monero lacks native support for hash time-locked contracts, the protocol avoids HTLCs entirely and instead relies on the combined-key construction to enforce the same conditional release. The sequence begins with the Bitcoin lock, which requires approximately ten minutes for confirmation. Only after that confirmation does the Monero lock occur, typically finalizing within two minutes. Timelocks then protect the swap: a cancel path opens after roughly twenty-four Bitcoin confirmations, while a punish path activates after one hundred forty-four blocks. This ordering and timing, documented in eigenwallet materials as of August 2026, ensures both chains reach a consistent state before either side can claim funds.

Eigenwallet as the Maintained Desktop Implementation

Eigenwallet, formerly UnstoppableSwap, functions as the primary maintained desktop application and protocol implementation for peer-to-peer BTC-to-XMR atomic swaps. Release 4.13.3, published on 2026-08-05, introduced a Tauri-based GUI after the project rename and repository shifts.

The software runs exclusively as the taker, allowing BTC holders to initiate swaps against offers from makers. Tor remains enabled by default for all peer connections. Project records indicate live operation in some form for more than three years as of mid-2026, with older related repositories having become dormant.

Documentation lists a practical minimum swap size of 0.0003 BTC. Sample maker configurations apply a 2% spread over the mean price. Timelock parameters set the cancel period at 24 Bitcoin confirmations and the punish period at 144 blocks. An anti-spam deposit of 2% is required, which permits a 98% refund on the refund path and becomes reclaimable after approximately three Bitcoin blocks.

These parameters position eigenwallet as the compatible option for users seeking maintained BTC-XMR atomic swap tooling.

Haveno for Monero-Native Multisig P2P Trades

Haveno functions as the leading open-source Monero-native P2P DEX. It relies on non-custodial multisignature escrow held on the Monero blockchain rather than pure cryptographic atomic swaps. Trades can include BTC, additional cryptocurrencies, and fiat pairs through the marketplace format.

Optional arbitrators stand ready to intervene in disputes when participants pre-select this route. All peer communications travel over Tor, and the core project neither operates nor endorses any specific network instances, leaving those to independent third-party deployments.

This escrow model provides a distinct path from adaptor-signature protocols. Users retain control of funds until both parties meet the multisig conditions or an arbitrator intervenes. The design supports mainnet activity through community-run networks while keeping the protocol itself separate from any single operator.

Because Haveno centers on Monero’s native multisig capabilities, it avoids the need for separate HTLC or adaptor infrastructure on the Monero side. Traders therefore access a broader set of pairs within one interface while still benefiting from the chain’s privacy features and the registration-free nature of the underlying P2P structure.

Platform Comparison Table

The table above summarizes distinctions between eigenwallet and Haveno for users evaluating BTC-XMR options in 2026. Eigenwallet emphasizes cryptographic atomicity without HTLCs on the Monero side, while Haveno centers on multisig escrow for a wider range of assets. Confirmation and timelock details apply specifically to eigenwallet's Bitcoin-side mechanics and are tied to block times rather than fixed clock durations. Maintenance status reflects that eigenwallet directs users away from dormant repositories such as certain Farcaster or COMIT forks, positioning it as the ongoing desktop choice. Haveno continues to be noted for its Tor-routed communications and third-party network flexibility. Traders weighing the platforms should review current maker availability and escrow parameters directly, as aggregate liquidity figures remain unverified across sources.

Liquidity Models, Risks and Practical Considerations

Eigenwallet makers draw liquidity through six distinct replenishment paths identified in a September 2026 analysis. These paths include Lightning Network channels, cross-chain bridges, centralized exchanges, decentralized exchanges, and privacy-focused tools, allowing providers to refill XMR inventories without relying on a single source.

The primary ETH-XMR atomic swap repository maintained by AthanorLabs was archived on September 1, 2026, narrowing options for users seeking that specific pair outside eigenwallet’s BTC-XMR focus.

Key risks include maker-specific spreads that can reach 2 percent above the mean price, minimum swap sizes near 0.0003 BTC, and timelock windows of roughly 4 hours for cancellation and 24 hours for punishment. Liquidity can vary by maker availability, and transactions flagged during compliance screening may trigger identity verification even on otherwise registration-free platforms.

Best practices for users:

• Verify current maker spreads and anti-spam deposit terms before committing.
• Enable Tor for all peer connections to preserve privacy.
• Confirm the exact timelock parameters in the chosen client version.
• Start with smaller test swaps to assess execution speed and refund paths.
• Monitor project repositories for maintenance status before relying on any protocol.

FAQ

What is the practical minimum swap size on eigenwallet?

Documentation lists a practical minimum around 0.0003 BTC as of August 2026. Smaller amounts may fail due to fee and anti-spam deposit requirements.

Do BTC-XMR atomic swaps require KYC?

These tools operate registration-free and require no KYC for most swaps. Identity verification may be requested in specific compliance situations.

Is mobile support available for eigenwallet or Haveno?

Both projects focus on desktop implementations. No verified mobile clients are documented for native atomic swap or multisig flows.

How do I choose between eigenwallet and Haveno?

Use eigenwallet for pure cryptographic BTC-XMR atomic swaps. Choose Haveno when you need Monero multisig escrow for broader pairs including fiat.

Are other protocols like COMIT or Farcaster still viable?

Primary sources from mid-2026 list related repositories as dormant. Eigenwallet is positioned as the sole maintained BTC-XMR option.

How long does a typical swap take?

Bitcoin lock requires roughly 10 minutes and Monero lock follows in about 2 minutes, with timelocks extending up to 24 hours for dispute resolution.