BlockchainAdvanced#DEX#Interoperability
Atomic Swap
A
Definition
A protocol for conditionally exchanging assets across compatible systems, often using hashlocks and timelocks. Atomicity applies only to the protocol's specified settlement conditions; it does not eliminate implementation, market, privacy, or legal risk.
Source reviewed
- Ethereum EIP-2266: atomic swap standard opens in a new tab
Supports: Describes an atomic-swap contract using HTLCs, including the use of timed conditions for atomicity.
- IACR: On the optionality and fairness of Atomic Swaps opens in a new tab
Supports: Analyzes timing, confirmation, and fairness limitations in atomic-swap designs rather than treating atomicy as a complete risk solution.
Concept Diagram
Key Takeaways
1
Atomic swaps apply conditional settlement rules to a compatible asset pair; they are not universal cross-chain transfers
2
Hashlocks and timelocks can provide claim and refund paths, but require correct protocol parameters and active handling
3
Funds can be delayed or locked while confirmations, fees, or timeout conditions are unresolved
4
Atomicity does not guarantee liquidity, price, privacy, audit quality, or legal compliance
Practical Example
Before an atomic swap, a user verifies that both assets and wallets support the exact protocol, reads the timeout order and refund steps, keeps funds for network fees, and tests a small supported amount. If the other party disappears, the user follows the documented refund path after its timeout; they do not assume funds return automatically or that the market price is protected.
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Related Terms
Blockchain
Cross-Chain BridgeA system that transfers assets, messages, or state between blockchain environments. Its security depends on the verification model, contracts, operators, and the chains it connects.
Blockchain
DEX (Decentralized Exchange)An exchange design that uses blockchain transactions, smart contracts, or an onchain order book to match or execute trades. Custody, operator roles, access controls, fees, execution, and protections vary by protocol and jurisdiction.
Blockchain
Layer 2 (L2)A protocol layer that executes transactions outside an L1 while using that L1 for some combination of data availability, proofs, dispute resolution, or settlement. Fees, finality, bridges, and withdrawal paths depend on the specific L2 design.
Blockchain
Smart ContractA program and its state deployed at a blockchain address, which runs its defined functions when transactions call it.
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