Function formatNumber

formatNumber(
    input: Nullish<number>,
    type?: NumberType,
    placeholder?: string,
): string
Formats a numeric value according to the specified number type formatting rules.

This function serves as the main entry point for number formatting throughout the application. It applies consistent formatting based on the context where the number is displayed (e.g., token amounts, fiat prices, portfolio balances) using predefined formatter rules.
Parameters
- input: Nullish<number>
  The numeric value to format (can be null or undefined)
- Optionaltype: NumberType = NumberType.TokenNonTx
  The formatting type to apply
- Optionalplaceholder: string = '-'
  Value to return if input is null or undefined
Returns string
The formatted number as a string
Example
```
// Format a token balance
formatNumber(0.0005, NumberType.TokenNonTx);
// Returns: '<0.001'
```
Example
```
// Format a fiat price with default parameters
formatNumber(1234.567, NumberType.FiatTokenPrice);
// Returns: '$1,234.57'
```
Example
```
// Format a token amount for a transaction with custom placeholder
formatNumber(null, NumberType.TokenTx, 'N/A');
// Returns: 'N/A'
```
Example
```
// Format a gas price
formatNumber(0.0099, NumberType.FiatGasPrice);
// Returns: '<$0.01'
```
- Defined in src/utils/numberFormat.ts:384