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2 changes: 1 addition & 1 deletion concepts/bridging/cross-domain.mdx
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title: Cross-Domain Overview
description: An overview of the lifecycle of an OP Stack cross-chain transaction, detailing the flow of transactions between Layer 2 and Layer 1.
---
This overview provides a detailed walkthrough of the lifecycle of cross-chain transactions, covering deposits, withdrawals, and transaction flows between L1 and L2. The diagram below illustrates the main components and steps involved.

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![Lifecycle of an OP Stack Crosschain Transaction.](/public/img/op-stack/protocol/op-cross-chain-txn.jpeg)
_Figure 1: The Lifecycle of an OP Stack Crosschain Transaction_
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The message is received by the OptimismPortal on L2. Here, the deposited assets are held securely until the transaction is finalized. The portal initiates the deposit transaction, updating the user's balance on L2.

4. **Finalization (L2 CrossDomain Messenger):**
The L2 CrossDomain Messenger processes the deposit by updating the user's account balance, and making the assets available for use on L2.
The L2 CrossDomain Messenger processes the deposit by updating the user's account balance and making the assets available for use on L2.

## Transaction (Tx) Flow

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