67 lines
1.9 KiB
JavaScript
67 lines
1.9 KiB
JavaScript
#!/usr/bin/env node
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const path = require('path')
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require('dotenv').config({ path: path.resolve(__dirname, '../.env') })
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const hdkey = require('ethereumjs-wallet/hdkey')
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const hkdf = require('futoin-hkdf')
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const db = require('../lib/db')
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const _ = require('lodash/fp')
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const mnemonicHelpers = require('../lib/mnemonic-helpers')
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const pify = require('pify')
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const fs = pify(require('fs'))
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const MNEMONIC_PATH = process.env.MNEMONIC_PATH
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const defaultPrefixPath = "m/44'/60'/1'/0'"
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const paymentPrefixPath = "m/44'/60'/0'/0'"
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const address = process.argv[2]
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if (!MNEMONIC_PATH) {
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console.error(`Unable to fetch mnemonic from your account!`)
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process.exit(1)
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}
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if (!address) {
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console.log('Usage: lamassu-eth-recovery <cash-out address>')
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process.exit(2)
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}
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function run (address) {
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Promise.all([fetchMnemonic(), searchForHdIndex(address)])
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.then(([mnemonic, hdIndex]) => {
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try {
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const prefix = !_.isNil(hdIndex) ? paymentPrefixPath : defaultPrefixPath
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console.log(`Private key: `, defaultHdNode(mnemonic, prefix).deriveChild(hdIndex).getWallet().getPrivateKeyString())
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process.exit(0)
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} catch (err) {
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console.error(`Error while retrieving private key!`)
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process.exit(3)
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}
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})
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}
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function searchForHdIndex (address) {
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const sql = `SELECT hd_index FROM cash_out_txs WHERE to_address = $1`
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return db.oneOrNone(sql, [address])
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.then(result => _.get('hd_index', result))
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}
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function fetchMnemonic () {
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return fs.readFile(MNEMONIC_PATH, 'utf8')
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.then(mnemonic => computeSeed(mnemonic))
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}
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function computeSeed (seed) {
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const masterSeed = mnemonicHelpers.toEntropyBuffer(seed)
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return hkdf(masterSeed, 32, { salt: 'lamassu-server-salt', info: 'wallet-seed' })
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}
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function defaultHdNode (masterSeed, prefix) {
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if (!masterSeed) throw new Error('No master seed!')
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const key = hdkey.fromMasterSeed(masterSeed)
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return key.derivePath(prefix)
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}
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run(address)
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