# sendToFx

sendToFx cross chain means that the contract deployed on other chains communicates with Pundi AIFX through cross chain bridge to realize cross chain with Pundi AIFX.

supported external chains:

* Ethereum
* Binance Smart Chain
* Polygon
* Tron
* Avalanche
* Optimism
* Arbitrum

## Bridge Contract

{% tabs %}
{% tab title="Mainnet" %}

| Chain               | Contract Address                                                                                                         |
| ------------------- | ------------------------------------------------------------------------------------------------------------------------ |
| Ethereum            | [0x6f1D09Fed11115d65E1071CD2109eDb300D80A27](https://etherscan.io/address/0x6f1D09Fed11115d65E1071CD2109eDb300D80A27)    |
| Binance Smart Chain | [0x84238c00c8313920826D798e3cF6793Ef4F610ad](https://bscscan.com/address/0x84238c00c8313920826D798e3cF6793Ef4F610ad)     |
| Polygon             | [0x4052eA614c5a96631C546d8B8d323a7C3D9ABb69](https://polygonscan.com/address/0x4052eA614c5a96631C546d8B8d323a7C3D9ABb69) |
| Tron                | [TKLDunqAynYcXRktcYHqncp3R6nJeEXLd5](https://tronscan.org/#/address/TKLDunqAynYcXRktcYHqncp3R6nJeEXLd5)                  |
| Avalanche           | [0xDc3706d164d2D88b85ed702079ab331e2476D475](https://snowtrace.io/address/0xDc3706d164d2D88b85ed702079ab331e2476D475)    |
| Base                | [0x7a986bA67227acfab86385FF33436a80E2BB4CC5](https://basescan.org/address/0x7a986bA67227acfab86385FF33436a80E2BB4CC5)    |
| {% endtab %}        |                                                                                                                          |

{% tab title="Testnet" %}

| Chain               | Contract Address                                                                                                                       |
| ------------------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| Ethereum            | [0xd384a8e8822Ea845e83eb5AA2877239150615C18](https://sepolia.etherscan.io/address/0xd384a8e8822ea845e83eb5aa2877239150615c18)          |
| Binance Smart Chain | [0x4C0974BC7e3911a0682a1E17F0faD59A2eF4A637](https://testnet.bscscan.com/address/0x4C0974BC7e3911a0682a1E17F0faD59A2eF4A637)           |
| Polygon             | [0xC975D6DE5dBE47C05FE42fea9565dd50dF345202](https://amoy.polygonscan.com/address/0xc975d6de5dbe47c05fe42fea9565dd50df345202)          |
| Tron                | [TAXdkUAde6ztmJyQqANL4jwDYab8D9shQs](https://nile.tronscan.org/#/address/TAXdkUAde6ztmJyQqANL4jwDYab8D9shQs)                           |
| Avalanche           | [0xe79893e4218a9d855Ef6beeA8366119b92007d64](https://testnet.snowtrace.io/address/0xe79893e4218a9d855Ef6beeA8366119b92007d64)          |
| Optimism            | [0xCA1c58AF317C88Cdb41d4AB17B50592771356E69](https://sepolia-optimism.etherscan.io/address/0xca1c58af317c88cdb41d4ab17b50592771356e69) |
| Arbitrum            | [0xCA1c58AF317C88Cdb41d4AB17B50592771356E69](https://sepolia.arbiscan.io/address/0xca1c58af317c88cdb41d4ab17b50592771356e69)           |
| Base                | [0x9164D153b8Af6D94d41E7876E814DD3Db1AEC320](https://sepolia.basescan.org/address/0x9164d153b8af6d94d41e7876e814dd3db1aec320)          |
| {% endtab %}        |                                                                                                                                        |
| {% endtabs %}       |                                                                                                                                        |

## Method

### sendToFx

send token from external chain to Pundi AIFX

{% hint style="info" %}
must be approved before calling this method
{% endhint %}

```solidity
function sendToFx(address _tokenContract, bytes32 _destination, bytes32 _targetIBC, uint256 _amount) external;
```

* `_tokenContract`: the contract address of the token on the external chain
* `_destination`: the destination address on the Pundi AIFX chain or other cosmos chain
* `_targetIBC`: the target of the token on the Pundi AIFX chain(more details see [Target](https://pundi.gitbook.io/pundi/pundi-aifx/developers/cross-chain/target))
  * \_targetIBC represents cross chain destination, such as `Pundi AIFX`, `Pundix`, `Marginx`
  * destination Pundi AIFX: \_targetIBC is empty
  * destination erc20 token: \_targetIBC is `erc20`
  * destination other cosmos chain(example Pundix): \_targetIBC is `ibc/{id}/{prefix}`.
    * `id` is the channel id of the target chain on Pundi AIFX(examples: Pundix: 0)
    * `prefix` is the address prefix of the target chain(examples: Pundix: px)
* `_amount`: the amount of the token to be cross chain

{% hint style="info" %}
\_destination convert address to bytes, if less than 32, fill in 0 in front, until 32 bytes
{% endhint %}

{% hint style="info" %}
\_targetIBC convert string to bytes, if less than 32, fill in 0 in behind, until 32 bytes
{% endhint %}

### getBridgeTokenList

get cross chain token list

```solidity
function getBridgeTokenList() external view returns (BridgeToken[] memory);
```

BridgeToken struct

```solidity
struct BridgeToken {
    address addr;
    string name;
    string symbol;
    uint8 decimals;
}
```

### checkAssetStatus

check if the token is supported cross chain

```solidity
function checkAssetStatus(address _tokenAddr) external view returns (bool status);
```

* `_tokenAddr`: the contract address of the token on the external chain
* `status`: true means good condition