import { ActionWithL2 } from '../../ActionWithL2';
import { requireAddress } from '../../utils/general';
import { getAddr } from '../../addresses';
import { EthAddress, uint256 } from '../../types';

/**
 * Unwraps a specified amount of WETH from the proxy
 *
 * @category BasicActions
 */
export class UnwrapEthAction extends ActionWithL2 {
  /**
   * @param amount Amount to unwrap
   * @param to Transfer recipient
   */
  constructor(amount:uint256, to:EthAddress) {
    requireAddress(to);
    super(
      'UnwrapEth',
      getAddr('UnwrapEth'),
      [
        'uint256',
        'address',
      ],
      [amount, to],
    );
  }

  encodeInputs() {
    // executeActionDirectL2
    let encodedInput = '0x2895f3aa';
    // amount
    encodedInput = encodedInput.concat(this.numberToBytes32(this.args[0][0]));
    // to
    encodedInput = encodedInput.concat(this.addressToBytes20(this.args[0][1]));

    return encodedInput;
  }
}