@daostack/upgrades/lib/proxy/Proxy.js

Proxy upgadable contracts based on openzeppelin-sdk

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const web3_utils_1 = require("web3-utils");
const ZWeb3_1 = __importDefault(require("../artifacts/ZWeb3"));
const Contracts_1 = __importDefault(require("../artifacts/Contracts"));
const Addresses_1 = require("../utils/Addresses");
const Transactions_1 = __importDefault(require("../utils/Transactions"));
const Constants_1 = require("../utils/Constants");
class Proxy {
    constructor(contract, txParams = {}) {
        this.address = Addresses_1.toAddress(contract);
        this.contract = contract;
        this.txParams = txParams;
    }
    static at(contractOrAddress, txParams = {}) {
        const ProxyContract = Contracts_1.default.getFromLib('AdminUpgradeabilityProxy');
        const contract = ProxyContract.at(Addresses_1.toAddress(contractOrAddress));
        return new this(contract, txParams);
    }
    static async deploy(implementation, admin, initData, txParams = {}) {
        const ProxyContract = Contracts_1.default.getFromLib('AdminUpgradeabilityProxy');
        const contractParams = [Addresses_1.toAddress(implementation), Addresses_1.toAddress(admin), initData || Buffer.from('')];
        const contract = await Transactions_1.default.deployContract(ProxyContract, contractParams, txParams);
        return new this(contract, txParams);
    }
    async upgradeTo(address, migrateData) {
        await this.checkAdmin();
        return migrateData
            ? Transactions_1.default.sendTransaction(this.contract.methods.upgradeToAndCall, [Addresses_1.toAddress(address), migrateData], this.txParams)
            : Transactions_1.default.sendTransaction(this.contract.methods.upgradeTo, [Addresses_1.toAddress(address)], this.txParams);
    }
    async changeAdmin(newAdmin) {
        await this.checkAdmin();
        return Transactions_1.default.sendTransaction(this.contract.methods.changeAdmin, [newAdmin], this.txParams);
    }
    async implementation() {
        const hashedLabel = web3_utils_1.toHex(web3_utils_1.toBN(web3_utils_1.sha3(Constants_1.IMPLEMENTATION_LABEL)).sub(web3_utils_1.toBN(1)));
        let storage = await this.getStorageAt(hashedLabel);
        // TODO-v3: Remove deprecated 'zos' support
        if (storage === '0x0') {
            storage = await this.getStorageAt(web3_utils_1.sha3(Constants_1.DEPRECATED_IMPLEMENTATION_LABEL));
        }
        return Addresses_1.uint256ToAddress(storage);
    }
    async admin() {
        const hashedLabel = web3_utils_1.toHex(web3_utils_1.toBN(web3_utils_1.sha3(Constants_1.ADMIN_LABEL)).sub(web3_utils_1.toBN(1)));
        let storage = await this.getStorageAt(hashedLabel);
        // TODO-v3: Remove deprecated 'zos' support
        if (storage === '0x0') {
            storage = await this.getStorageAt(web3_utils_1.sha3(Constants_1.DEPRECATED_ADMIN_LABEL));
        }
        return Addresses_1.uint256ToAddress(storage);
    }
    async getStorageAt(position) {
        return ZWeb3_1.default.eth.getStorageAt(this.address, position);
    }
    async checkAdmin() {
        const currentAdmin = await this.admin();
        const { from } = this.txParams;
        // TODO: If no `from` is set, load which is the default account and use it to compare against the current admin
        if (from && currentAdmin !== from)
            throw new Error(`Cannot modify proxy from non-admin account: current admin is ${currentAdmin} and sender is ${from}`);
    }
}
exports.default = Proxy;
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