Blockchain & Cryptocurrency Glossary

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Cross Order

1 min read
Pronunciation
[kraws awr-der]
Analogy
Like arranging a simultaneous trade between two stock exchanges so you buy in one market and sell in another at the same time.
Definition
An order type that matches buy and sell orders across different trading venues or chains, executing an atomic swap without requiring on‑chain bridging by the user.
Key Points Intro
Cross orders enable seamless multi‑venue execution with atomic settlement.
Key Points

Atomicity: Ensures both legs execute or neither does.

Smart routing: Finds counterparties across DEXs or chains.

Settlement layer: Uses escrow contracts or HTLCs.

Fee optimization: Splits fees across venues for best net cost.

Example
A trader places a cross order to buy BTC on Ethereum DEX and sell USDC on Solana DEX, with an aggregator smart contract coordinating both legs.
Technical Deep Dive
Aggregator contract locks user funds, initiates `swap()` on venue A, then `swap()` on venue B. If second leg fails, first is reverted via revert logic in a single tx on both chains using CCIP or flash execution.
Security Warning
Complex atomic transactions can fail partially if gas or liquidity is insufficient; include slippage and timeout safeguards.
Caveat
Cross‑chain atomicity depends on reliable messaging; network issues can cause stalled orders.
Related Terms
Atomic Swap
Bridge Router

Cross Order - Related Articles

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