Function createSrc20FeeCalculator

createSrc20FeeCalculator(
customRules?: Partial<Src20FeeRules>,
src20Options?: SRC20BuilderOptions,
): Src20FeeCalculator
Create an SRC-20 fee calculator with customizable rules for token transactions
Parameters
- OptionalcustomRules: Partial<Src20FeeRules>
  Optional partial fee rules to override defaults
- Optionalsrc20Options: SRC20BuilderOptions
  Optional SRC-20 specific configuration
Returns Src20FeeCalculator
A configured Src20FeeCalculator instance
Example: Basic SRC-20 fee calculation
```
const calculator = createSrc20FeeCalculator();
const fee = calculator.calculateTransferFee(utxos, feeRate);
```
Example: With custom rules
```
const calculator = createSrc20FeeCalculator({
  baseMultiplier: 1.5,
  minFeeMultiplier: 2
});
```
- Defined in utils/src20-fee-calculator.ts:488