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swapXFG is Fuego’s cross-chain atomic swap stack (SwapDaemon / suite binaries). A swap either completes for both sides or refunds — no custodial middleman.

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Guarantee

  • Complete: both parties receive agreed assets
  • Refund: both recover originals after timelock
No partial “exchange keeps your funds.”

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Mechanism

Fuego uses adaptor signatures (and chain-specific clients) rather than only classical HTLCs on every chain. High-level flow:
  1. Parties exchange adaptor / setup data
  2. Each locks or prepares chain-specific spend paths
  3. Completion reveals the secret material needed for the other leg
  4. Timeout → refund path
State is persisted by the swap daemon so restarts resume non-terminal swaps.

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Protocol swap fee (live)

Charged twice per completed swap: 1% on initiation + 1% on claim = 2% total (Alice and Bob each pay 1%). Initiated from the SwapXFG TUI or the DeXFG tab in the Fuego-Wallet GUI.

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Fee split (not 100% to CDs)

Counterparty chains charge only their own network/miner fees on top.

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vs Hearth

These are the only two protocol earnings streams. Mint premium is 0 bps (goes nowhere); the 0.1% CD creation fee is a donation to @fuegoxfg, not protocol revenue.

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Timeouts

If a counterparty stalls, wait for timelock then refund (refund / RPC). Watchdog logs are warnings only — you initiate refunds.