caver-js/packages/caver-klay/caver-klay-accounts/src/accountKey/accountKeyMultiSig.js

caver-js is a JavaScript API library that allows developers to interact with a Klaytn node

/*
    Copyright 2019 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 AccountKeyEnum = require('./accountKeyEnum').AccountKeyEnum

const MAX_MULTISIG_KEY_LENGTH = 10

class AccountKeyMultiSig {
    constructor(keys) {
        if (keys instanceof AccountKeyMultiSig) keys = keys.keys

        if (!Array.isArray(keys)) throw new Error('To create AccountKeyMultiSig, an array of private key strings is required.')
        if (keys.length === 0) throw new Error('Empty array.')
        if (keys.length > MAX_MULTISIG_KEY_LENGTH) throw new Error(`The maximum number of keys is ${MAX_MULTISIG_KEY_LENGTH}.`)
        if (isDuple(keys)) throw new Error('There is a duplicate key.')

        this._keys = keys
        this.type = AccountKeyEnum.ACCOUNT_KEY_MULTISIG
    }

    get defaultKey() {
        return this._keys[0]
    }

    get keys() {
        return this._keys
    }

    get transactionKey() {
        return this._keys
    }

    get updateKey() {
        return this._keys
    }

    get feePayerKey() {
        return this._keys
    }

    toPublicKey(toPublicKeyFunc) {
        const keys = []

        for (let i = 0; i < this._keys.length; i++) {
            const key = this._keys[i]
            keys.push(toPublicKeyFunc(key))
        }

        return keys
    }

    update(keys) {
        this._keys = keys.keys
    }
}

function isDuple(keys) {
    const map = new Map()
    for (const key of keys) {
        if (map.get(key) !== undefined) return true
        map.set(key, true)
    }
    return false
}

module.exports = AccountKeyMultiSig