# How to create a bank

You can create a new custom Bank using the BankFactory contract. This process involves calling the `createBank` function and specifying various parameters to configure the initial settings of the Bank.

### Function Signature

```solidity
function createBank(
    IERC20 asset,
    string memory name,
    string memory symbol,
    uint256 initialFee,
    address initialFeeRecipient,
    uint256 minDelay,
    IBank.BankType bankType
) external returns (Bank)
```

### Parameters

<table><thead><tr><th width="188">Parameter</th><th width="153">Type</th><th>Description</th></tr></thead><tbody><tr><td>asset</td><td>IERC20</td><td>The address of the base asset (token) to be used in the Bank</td></tr><tr><td>name</td><td>string</td><td>The name of the Bank</td></tr><tr><td>symbol</td><td>string</td><td>The symbol of the Bank</td></tr><tr><td>initialFee</td><td>uint256</td><td>Initial fee setting (max 1000, which represents 10%)</td></tr><tr><td>initialFeeRecipient</td><td>address</td><td>The initial address to receive fees</td></tr><tr><td>minDelay</td><td>uint256</td><td>Minimum delay for timelock operations (in seconds)</td></tr><tr><td>bankType</td><td>IBank.BankType</td><td>Type of the Bank (Public or Private)</td></tr></tbody></table>

### Returns

* `Bank`: The address of the newly created Bank contract

### Usage Example (using ethers.js)

```typescript
const BankFactory = // Initialize BankFactory contract instance

// Prepare parameters
const asset = "0x..."; // Base asset token address
const name = "My Bank";
const symbol = "MBNK";
const initialFee = 100; // 1% fee
const initialFeeRecipient = "0x..."; // Fee recipient address
const minDelay = 86400; // 1 day
const bankType = 0; // 0: Public, 1: Private

// Create Bank
const tx = await BankFactory.createBank(
    asset,
    name,
    symbol,
    initialFee,
    initialFeeRecipient,
    minDelay,
    bankType
);

const receipt = await tx.wait();

// Extract new Bank address from event
const bankCreatedEvent = receipt.events.find(e => e.event === 'BankCreated');
const newBankAddress = bankCreatedEvent.args.bank;
console.log(`New Bank created at: ${newBankAddress}`);
```

### Important Notes

* `initialFee` should be a value between 0 and 1000 (0% - 10%).
* `minDelay` should be set carefully. Too short may pose security risks, while too long may cause operational inconvenience. (minimum: 600 seconds)
* If creating a Private Bank (type: 1), subsequent whitelist management will be necessary.
* After creating the Bank, you need to add the required Markets and set allocations.

### Event

A `BankCreated` event is emitted when a Bank is created:

```solidity
event BankCreated(
    address indexed bank,
    address indexed asset,
    string name,
    string symbol
);
```

You can monitor this event to track the creation of new Banks.

After creating a Bank, you can use its address to perform additional setup and management operations.