# Cross-chain Interfaces

## Token Transfer

#### Function

```solidity
function sendFrom(
  address _from, 
  uint16 _dstChainId, 
  bytes calldata _toAddress, 
  uint _amount, 
  address payable _refundAddress, 
  address _zroPaymentAddress, 
  bytes calldata _adapterParams
) public
```

#### ABI

```json
{
  "inputs": [
    {
      "internalType": "address",
      "name": "_from",
      "type": "address"
    },
    {
      "internalType": "uint16",
      "name": "_dstChainId",
      "type": "uint16"
    },
    {
      "internalType": "bytes",
      "name": "_toAddress",
      "type": "bytes"
    },
    {
      "internalType": "uint256",
      "name": "_amount",
      "type": "uint256"
    },
    {
      "internalType": "address payable",
      "name": "_refundAddress",
      "type": "address"
    },
    {
      "internalType": "address",
      "name": "_zroPaymentAddress",
      "type": "address"
    },
    {
      "internalType": "bytes",
      "name": "_adapterParams",
      "type": "bytes"
    }
  ],
  "name": "sendFrom",
  "outputs": [],
  "stateMutability": "payable",
  "type": "function"
}
```

\`\_dstChainId\` list could find here: <https://layerzero.gitbook.io/docs/technical-reference/mainnet/supported-chain-ids>&#x20;

## Fetch STONE Price

#### Function

```solidity
function tokenPrice() public returns (uint256 price)
```

#### ABI

```solidity
{
  "inputs": [],
  "name": "tokenPrice",
  "outputs": [
    {
      "internalType": "uint256",
      "name": "price",
      "type": "uint256"
    }
  ],
  "stateMutability": "nonpayable",
  "type": "function"
}
```

## Price Feeding

#### Function

```solidity
function updatePrice(
    uint16 _dstChainId,
    bytes memory _toAddress
) public payable returns (uint256 price) 
```

#### ABI

```solidity
{
  "inputs": [
    {
      "internalType": "uint16",
      "name": "_dstChainId",
      "type": "uint16"
    },
    {
      "internalType": "bytes",
      "name": "_toAddress",
      "type": "bytes"
    }
  ],
  "name": "updatePrice",
  "outputs": [
    {
      "internalType": "uint256",
      "name": "price",
      "type": "uint256"
    }
  ],
  "stateMutability": "payable",
  "type": "function"
}
```


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