text: /*
      Copyright 2020 The caver-js Authors
      This file is part of the caver-js library.
  
      The caver-js library is free software: you can redistribute it and/or modify
      it under the terms of the GNU Lesser General Public License as published by
      the Free Software Foundation, either version 3 of the License, or
      (at your option) any later version.
  
      The caver-js library is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      GNU Lesser General Public License for more details.
  
      You should have received a copy of the GNU Lesser General Public License
      along with the caver-js. If not, see <http://www.gnu.org/licenses/>.
  */
  
  const RLP = require('eth-lib/lib/rlp')
  const Bytes = require('eth-lib/lib/bytes')
  const _ = require('lodash')
  const AbstractFeeDelegatedTransaction = require('../abstractFeeDelegatedTransaction')
  const { TX_TYPE_STRING, TX_TYPE_TAG } = require('../../transactionHelper/transactionHelper')
  const utils = require('../../../../caver-utils/src')
  
  function _decode(rlpEncoded) {
      rlpEncoded = utils.addHexPrefix(rlpEncoded)
      if (!rlpEncoded.startsWith(TX_TYPE_TAG.TxTypeFeeDelegatedCancel))
          throw new Error(`Cannot decode to FeeDelegatedCancel. The prefix must be ${TX_TYPE_TAG.TxTypeFeeDelegatedCancel}: ${rlpEncoded}`)
  
      const typeDettached = `0x${rlpEncoded.slice(4)}`
      const [nonce, gasPrice, gas, from, signatures, feePayer, feePayerSignatures] = RLP.decode(typeDettached)
      return {
          nonce: utils.trimLeadingZero(nonce),
          gasPrice: utils.trimLeadingZero(gasPrice),
          gas: utils.trimLeadingZero(gas),
          from,
          signatures,
          feePayer,
          feePayerSignatures,
      }
  }
  
  /**
   * Represents a fee delegated cancel transaction.
   * Please refer to https://docs.klaytn.com/klaytn/design/transactions/fee-delegation#txtypefeedelegatedcancel to see more detail.
   * @class
   */
  class FeeDelegatedCancel extends AbstractFeeDelegatedTransaction {
      /**
       * decodes the RLP-encoded string and returns a FeeDelegatedCancel transaction instance.
       *
       * @param {string} rlpEncoded The RLP-encoded fee delegated cancel transaction.
       * @return {FeeDelegatedCancel}
       */
      static decode(rlpEncoded) {
          return new FeeDelegatedCancel(_decode(rlpEncoded))
      }
  
      /**
       * Creates a fee delegated cancel transaction.
       * @constructor
       * @param {object|string} createTxObj - The parameters to create a FeeDelegatedCancel transaction. This can be an object defining transaction information, or it can be an RLP-encoded string.
       *                                      If it is an RLP-encoded string, decode it to create a transaction instance.
       *                               The object can define `from`, `to`, `value`, `nonce`, `gas`, `gasPrice`, `signatures`, `feePayer`, `feePayerSignatures` and `chainId`.
       */
      constructor(createTxObj) {
          if (_.isString(createTxObj)) createTxObj = _decode(createTxObj)
          super(TX_TYPE_STRING.TxTypeFeeDelegatedCancel, createTxObj)
      }
  
      /**
       * Returns the RLP-encoded string of this transaction (i.e., rawTransaction).
       * @return {string}
       */
      getRLPEncoding() {
          this.validateOptionalValues()
          const signatures = this.signatures.map(sig => sig.encode())
          const feePayerSignatures = this.feePayerSignatures.map(sig => sig.encode())
  
          return (
              TX_TYPE_TAG.TxTypeFeeDelegatedCancel +
              RLP.encode([
                  Bytes.fromNat(this.nonce),
                  Bytes.fromNat(this.gasPrice),
                  Bytes.fromNat(this.gas),
                  this.from.toLowerCase(),
                  signatures,
                  this.feePayer.toLowerCase(),
                  feePayerSignatures,
              ]).slice(2)
          )
      }
  
      /**
       * Returns the RLP-encoded string to make the signature of this transaction.
       * @return {string}
       */
      getCommonRLPEncodingForSignature() {
          this.validateOptionalValues()
  
          return RLP.encode([
              TX_TYPE_TAG.TxTypeFeeDelegatedCancel,
              Bytes.fromNat(this.nonce),
              Bytes.fromNat(this.gasPrice),
              Bytes.fromNat(this.gas),
              this.from.toLowerCase(),
          ])
      }
  }
  
  module.exports = FeeDelegatedCancel
  