kernel-eth/src-build/build.ts

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2023-03-27 12:02:02 +00:00
// This is the standard build script for a kernel module.
import * as fs from "fs";
import read from "read";
import * as bip39 from "@scure/bip39";
import { wordlist } from "@scure/bip39/wordlists/english.js";
//@ts-ignore
import { SkynetClient } from "@skynetlabs/skynet-nodejs";
// Helper variables to make it easier to return empty values alongside errors.
const nu8 = new Uint8Array(0);
const nkp = {
publicKey: nu8,
secretKey: nu8,
};
// readFile is a wrapper for fs.readFileSync that handles the try-catch for the
// caller.
function readFile(fileName: string): [string, string | null] {
try {
let data = fs.readFileSync(fileName, "utf8");
return [data, null];
} catch (err) {
return ["", "unable to read file: " + JSON.stringify(err)];
}
}
// readFileBinary is a wrapper for fs.readFileSync that handles the try-catch
// for the caller.
function readFileBinary(fileName: string): [Uint8Array, string | null] {
try {
let data = fs.readFileSync(fileName, null);
return [data, null];
} catch (err) {
return [nu8, "unable to read file: " + JSON.stringify(err)];
}
}
// writeFile is a wrapper for fs.writeFileSync which handles the try-catch in a
// non-exception way.
function writeFile(fileName: string, fileData: string): string | null {
try {
fs.writeFileSync(fileName, fileData);
return null;
} catch (err) {
return "unable to write file: " + JSON.stringify(err);
}
}
// handlePass handles all portions of the script that occur after the password
// has been requested. If no password needs to be requested, handlePass will be
// called with a null input. We need to structure the code this way because the
// password reader is async and we can only access the password when using a
// callback.
function handlePass(password: string) {
try {
// If we are running prod and the seed file does not exist, we
// need to confirm the password and also warn the user to use a
// secure password.
if (!fs.existsSync(seedFile) && process.argv[2] === "prod") {
// The file does not exist, we need to confirm the
// password.
console.log();
console.log(
"No production entry found for module. Creating new production module..."
);
console.log(
"If someone can guess the password, they can push arbitrary changes to your module."
);
console.log("Please use a secure password.");
console.log();
read(
{ prompt: "Confirm Password: ", silent: true },
function (err: any, confirmPassword: string) {
if (err) {
console.error("unable to fetch password:", err);
process.exit(1);
}
if (password !== confirmPassword) {
console.error("passwords do not match");
process.exit(1);
}
handlePassConfirm(moduleSalt, password);
}
);
} else {
// If the seed file does exist, or if we are using dev,
// there's no need to confirm the password but we do
// need to pass the logic off to the handlePassConfirm
// callback.
handlePassConfirm(moduleSalt, password);
}
} catch (err) {
console.error("Unable to read seedFile:", err);
process.exit(1);
}
}
// handlePassConfirm handles the full script after the confirmation password
// has been provided. If not confirmation password is needed, this function
// will be called anyway using the unconfirmed password as input.
function handlePassConfirm(seed: string, password: string) {
// Create the seedFile if it does not exist. For dev we just save the
// seed to disk outright, because this is a dev build and therefore not
// security sensitive. Also the dev seed does not get pushed to the
// github repo.
//
// For prod, we use the seed to create a new seed (called the shield)
// which allows us to verify that the developer has provided the right
// password when deploying the module. The shield does get pushed to
// the github repo so that the production module is the same on all
// devices.
if (!fs.existsSync(seedFile) && process.argv[2] !== "prod") {
// Generate the seed phrase and write it to the file.
let seedPhrase = bip39.generateMnemonic(wordlist);
let errWF = writeFile(seedFile, seedPhrase);
if (errWF !== null) {
console.error("unable to write file:", errWF);
process.exit(1);
}
} else if (!fs.existsSync(seedFile) && process.argv[2] === "prod") {
// Generate the seed phrase.
let seedPhrase = bip39.generateMnemonic(wordlist);
// Write the registry link to the file.
}
// Load or verify the seed. If this is prod, the password is used to
// create and verify the seed. If this is dev, we just load the seed
// with no password.
let seedPhrase: string;
let registryLink: string;
if (process.argv[2] === "prod") {
// Generate the seed phrase from the password.
seedPhrase = bip39.generateMnemonic(wordlist);
} else {
let [sp, errRF] = readFile(seedFile);
if (errRF !== null) {
console.error("unable to read seed phrase for dev command from disk");
process.exit(1);
}
seedPhrase = sp;
}
let metadata = {
Filename: "index.js",
};
const client = new SkynetClient("https://web3portal.com");
client
.uploadFile("dist/index.js")
.then((result: any) => {
console.log("Immutable Link for module:", result);
})
.catch((err: any) => {
console.error("unable to upload file", err);
process.exit(1);
});
}
// Add a newline for readability.
console.log();
// Check for a 'dev' or 'prod' input to the script.
if (process.argv.length !== 3) {
console.error("need to provide either 'dev' or 'prod' as an input");
process.exit(1);
}
// Create the build folder if it does not exist.
if (!fs.existsSync("build")) {
fs.mkdirSync("build");
}
// Determine the seed file.
let seedFile: string;
if (process.argv[2] === "prod") {
seedFile = "module-skylink";
} else if (process.argv[2] === "dev") {
seedFile = "build/dev-seed";
} else {
console.error("need to provide either 'dev' or 'prod' as an input");
process.exit(1);
}
// If doing a prod deployment, check whether the salt file exists. If it does
// not, create it.
let moduleSalt: string;
if (!fs.existsSync(".module-salt")) {
moduleSalt = bip39.generateMnemonic(wordlist);
let errWF = writeFile(".module-salt", moduleSalt);
if (errWF !== null) {
console.error("unable to write module salt file:", errWF);
process.exit(1);
}
} else {
let [ms, errRF] = readFile(".module-salt");
if (errRF !== null) {
console.error("unable to read moduleSalt");
process.exit(1);
}
ms = ms.replace(/\n$/, "");
moduleSalt = ms;
}
// Need to get a password if this is a prod build.
if (process.argv[2] === "prod") {
read(
{ prompt: "Password: ", silent: true },
function (err: any, password: string) {
if (err) {
console.error("unable to fetch password:", err);
process.exit(1);
}
handlePass(password);
}
);
} else {
handlePass("");
}