> For the complete documentation index, see [llms.txt](https://docs.nucleusearn.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/base/roles/cross-chain/cross-chain-op-teller-with-multi-asset-support/crosschainoptellerwithmultiassetsupport.md).

# CrossChainOPTellerWithMultiAssetSupport

[Git Source](https://github.com/Ion-Protocol/nucleus-boring-vault/blob/cc0b494b83e17b9b169a73b96050d2810b690477/src/base/Roles/CrossChain/CrossChainOPTellerWithMultiAssetSupport.sol)

**Inherits:** CrossChainTellerBase

LayerZero implementation of CrossChainTeller

## State Variables

### messenger

```solidity
ICrossDomainMessenger public immutable messenger;
```

### peer

```solidity
address public peer;
```

### maxMessageGas

```solidity
uint32 public maxMessageGas;
```

### minMessageGas

```solidity
uint32 public minMessageGas;
```

### nonce

```solidity
uint128 public nonce;
```

## Functions

### constructor

```solidity
constructor(
    address _owner,
    address _vault,
    address _accountant,
    address _messenger
)
    CrossChainTellerBase(_owner, _vault, _accountant);
```

### setPeer

Callable by OWNER\_ROLE.

```solidity
function setPeer(address _peer) external requiresAuth;
```

**Parameters**

| Name    | Type      | Description     |
| ------- | --------- | --------------- |
| `_peer` | `address` | new peer to set |

### setGasBounds

*Callable by OWNER\_ROLE.*

```solidity
function setGasBounds(uint32 newMinMessageGas, uint32 newMaxMessageGas) external requiresAuth;
```

**Parameters**

| Name               | Type     | Description                 |
| ------------------ | -------- | --------------------------- |
| `newMinMessageGas` | `uint32` | the new minMessageGas bound |
| `newMaxMessageGas` | `uint32` | the new maxMessageGas bound |

### receiveBridgeMessage

Function for OP Messenger to call to receive a message and mint the shares on this chain

```solidity
function receiveBridgeMessage(address receiver, uint256 shareMintAmount, bytes32 messageId) external;
```

**Parameters**

| Name              | Type      | Description              |
| ----------------- | --------- | ------------------------ |
| `receiver`        | `address` | to receive the shares    |
| `shareMintAmount` | `uint256` | amount of shares to mint |
| `messageId`       | `bytes32` |                          |

### \_bridge

the virtual bridge function to execute Optimism messenger sendMessage()

```solidity
function _bridge(uint256 shareAmount, BridgeData calldata data) internal override returns (bytes32 messageId);
```

**Parameters**

| Name          | Type         | Description |
| ------------- | ------------ | ----------- |
| `shareAmount` | `uint256`    |             |
| `data`        | `BridgeData` | bridge data |

**Returns**

| Name        | Type      | Description |
| ----------- | --------- | ----------- |
| `messageId` | `bytes32` | messageId   |

### \_beforeBridge

before bridge hook to check gas bound and revert if someone's paying a fee

```solidity
function _beforeBridge(BridgeData calldata data) internal override;
```

**Parameters**

| Name   | Type         | Description |
| ------ | ------------ | ----------- |
| `data` | `BridgeData` | bridge data |

### \_quote

the virtual function to override to get bridge fees, always zero for OP

```solidity
function _quote(uint256 shareAmount, BridgeData calldata data) internal view override returns (uint256);
```

**Parameters**

| Name          | Type         | Description |
| ------------- | ------------ | ----------- |
| `shareAmount` | `uint256`    | to send     |
| `data`        | `BridgeData` | bridge data |

## Errors

### CrossChainOPTellerWithMultiAssetSupport\_OnlyMessenger

```solidity
error CrossChainOPTellerWithMultiAssetSupport_OnlyMessenger();
```

### CrossChainOPTellerWithMultiAssetSupport\_OnlyPeerAsSender

```solidity
error CrossChainOPTellerWithMultiAssetSupport_OnlyPeerAsSender();
```

### CrossChainOPTellerWithMultiAssetSupport\_NoFee

```solidity
error CrossChainOPTellerWithMultiAssetSupport_NoFee();
```

### CrossChainOPTellerWithMultiAssetSupport\_GasOutOfBounds

```solidity
error CrossChainOPTellerWithMultiAssetSupport_GasOutOfBounds(uint32);
```


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