# ExchangeUpgradability.sol

## Events

### FundsMigrated()

This event is emitted when funds are migrated to the new exchange, specified by the address 'newExchange'.

```
event FundsMigrated(address indexed user, address indexed newExchange);
```

| parameter   | type    |
| ----------- | ------- |
| user        | address |
| newExchange | address |

## Functions

### setNewExchangeAddress()

With this function the owner can set the address of the new version of the exchange contract.

```
function setNewExchangeAddress(address exchange) external onlyOwner
```

| parameter | type    |
| --------- | ------- |
| exchange  | address |

### allowOrRestrictMigrations()

This function is used to **enable or disable the migrations**. Can be called only by the **owner**.

```
function allowOrRestrictMigrations() external onlyOwner
```

### migrateFunds()

This function is used to **migrate** assets of the caller to the **new exchange contract**.

```
function migrateFunds(address[] calldata tokens) external
```

| parameter | type               |
| --------- | ------------------ |
| tokens    | array of addresses |

### importEthers()

This is a helper function used to migrate users' Ethers. It should be called only from the new exchange contract.

```
function importEthers(address user) external payable
```

| parameter | type    |
| --------- | ------- |
| user      | address |

### importTokens()

This is a helper function used to migrate users' Tokens. It should be called only from the new exchange contract.

```
function importTokens(address token, uint256 amount,
address user) external
```

| parameter | type    |
| --------- | ------- |
| token     | address |
| amount    | uint256 |
| user      | address |