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added xDomainMessageSender to the-scroll-messenger.mdx #344

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added xDomainMessageSender to the-scroll-messenger.mdx #344

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9 changes: 9 additions & 0 deletions src/content/docs/en/developers/l1-and-l2-bridging/the-scroll-messenger.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -146,3 +146,12 @@ Relay a L2 => L1 message with message proof.
| nonce | The nonce of the message to avoid replay attack. |
| message | The content of the message. |
| proof | The proof used to verify the correctness of the transaction. |

### xDomainMessageSender
`xDomainMessageSender` contains the address of the `msg.sender` that called `sendMessage` on the other chain.
```solidity
address public override xDomainMessageSender;
```
Note: `xDomainMessageSender` resets after the `relayMessageWithProof` function ends.
Make sure that only the `scrollMessenger` contract can call functions that use `xDomainMessageSender`.
See the [scroll contracts](/developers/scroll-contracts/#advanced-bridge-contracts) page to see the scrollMessenger contract addresses.