blockstack

<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/wallet.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../prettify.css" /> <link rel="stylesheet" href="../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../index.html">All files</a> / <a href="index.html">src</a> wallet.ts </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 79.75% Statements 63/79 </div> <div class='fl pad1y space-right2'> 40% Branches 4/10 </div> <div class='fl pad1y space-right2'> 75% Functions 21/28 </div> <div class='fl pad1y space-right2'> 80.77% Lines 63/78 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. </div> <div class='status-line medium'></div> <pre><table class="coverage"> <tr><td 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} from 'crypto' import bitcoin, { ECPair } from 'bitcoinjs-lib' import bip39 from 'bip39' import bip32, { BIP32 } from 'bip32' import { ecPairToHexString } from './utils' import { encryptMnemonic, decryptMnemonic } from './encryption/wallet'   const APPS_NODE_INDEX = 0 const IDENTITY_KEYCHAIN = 888 const BLOCKSTACK_ON_BITCOIN = 0   const BITCOIN_BIP_44_PURPOSE = 44 const BITCOIN_COIN_TYPE = 0 const BITCOIN_ACCOUNT_INDEX = 0   const EXTERNAL_ADDRESS = 'EXTERNAL_ADDRESS' const CHANGE_ADDRESS = 'CHANGE_ADDRESS'   export type IdentityKeyPair = { key: string, keyID: string, address: string, appsNodeKey: string, salt: string }   function hashCode(string: string) { let hash = 0 Iif (string.length === 0) return hash for (let i = 0; i < string.length; i++) { const character = string.charCodeAt(i) hash = (hash << 5) - hash + character hash &= hash } return hash & 0x7fffffff }   function getNodePrivateKey(node: BIP32): string { return ecPairToHexString(ECPair.fromPrivateKey(node.privateKey)) }   function getNodePublicKey(node: BIP32): string { return node.publicKey.toString('hex') }   /** * The BlockstackWallet class manages the hierarchical derivation * paths for a standard blockstack client wallet. This includes paths * for bitcoin payment address, blockstack identity addresses, blockstack * application specific addresses. * @private */ export class BlockstackWallet { rootNode: BIP32   constructor(rootNode: BIP32) { this.rootNode = rootNode }   toBase58(): string { return this.rootNode.toBase58() }   /** * Initialize a blockstack wallet from a seed buffer * @param {Buffer} seed - the input seed for initializing the root node * of the hierarchical wallet * @return {BlockstackWallet} the constructed wallet */ static fromSeedBuffer(seed: Buffer): BlockstackWallet { return new BlockstackWallet(bip32.fromSeed(seed)) }   /** * Initialize a blockstack wallet from a base58 string * @param {string} keychain - the Base58 string used to initialize * the root node of the hierarchical wallet * @return {BlockstackWallet} the constructed wallet */ static fromBase58(keychain: string): BlockstackWallet { return new BlockstackWallet(bip32.fromBase58(keychain)) }   /** * Initialize a blockstack wallet from an encrypted phrase & password. Throws * if the password is incorrect. Supports all formats of Blockstack phrases. * @param {string} data - The encrypted phrase as a hex-encoded string * @param {string} password - The plain password * @return {Promise<BlockstackWallet>} the constructed wallet */ static fromEncryptedMnemonic(data: string, password: string) { return decryptMnemonic(data, password) .then((mnemonic) => { const seed = bip39.mnemonicToSeed(mnemonic) return new BlockstackWallet(bip32.fromSeed(seed)) }) .catch((err) => { if (err.message && err.message.startsWith('bad header;')) { throw new Error('Incorrect password') } else { throw err } }) }   /** * Generate a BIP-39 12 word mnemonic * @return {Promise<string>} space-separated 12 word phrase */ static generateMnemonic() { return bip39.generateMnemonic(128, randomBytes) }   /** * Encrypt a mnemonic phrase with a password * @param {string} mnemonic - Raw mnemonic phrase * @param {string} password - Password to encrypt mnemonic with * @return {Promise<string>} Hex-encoded encrypted mnemonic */ static async encryptMnemonic(mnemonic: string, password: string) { const encryptedBuffer = await encryptMnemonic(mnemonic, password) return encryptedBuffer.toString('hex') }   getIdentityPrivateKeychain(): BIP32 { return this.rootNode .deriveHardened(IDENTITY_KEYCHAIN) .deriveHardened(BLOCKSTACK_ON_BITCOIN) }   getBitcoinPrivateKeychain(): BIP32 { return this.rootNode .deriveHardened(BITCOIN_BIP_44_PURPOSE) .deriveHardened(BITCOIN_COIN_TYPE) .deriveHardened(BITCOIN_ACCOUNT_INDEX) }   getBitcoinNode(addressIndex: number, chainType: string = EXTERNAL_ADDRESS): BIP32 { return BlockstackWallet.getNodeFromBitcoinKeychain( this.getBitcoinPrivateKeychain().toBase58(), addressIndex, chainType ) }   getIdentityAddressNode(identityIndex: number): BIP32 { const identityPrivateKeychain = this.getIdentityPrivateKeychain() return identityPrivateKeychain.deriveHardened(identityIndex) }   static getAppsNode(identityNode: BIP32): BIP32 { return identityNode.deriveHardened(APPS_NODE_INDEX) }   /** * Get a salt for use with creating application specific addresses * @return {String} the salt */ getIdentitySalt(): string { const identityPrivateKeychain = this.getIdentityPrivateKeychain() const publicKeyHex = getNodePublicKey(identityPrivateKeychain) return crypto.createHash('sha256').update(publicKeyHex).digest('hex') }   /** * Get a bitcoin receive address at a given index * @param {number} addressIndex - the index of the address * @return {String} address */ getBitcoinAddress(addressIndex: number): string { return BlockstackWallet.getAddressFromBIP32Node(this.getBitcoinNode(addressIndex)) }   /** * Get the private key hex-string for a given bitcoin receive address * @param {number} addressIndex - the index of the address * @return {String} the hex-string. this will be either 64 * characters long to denote an uncompressed bitcoin address, or 66 * characters long for a compressed bitcoin address. */ getBitcoinPrivateKey(addressIndex: number): string { return getNodePrivateKey(this.getBitcoinNode(addressIndex)) }   /** * Get the root node for the bitcoin public keychain * @return {String} base58-encoding of the public node */ getBitcoinPublicKeychain(): BIP32 { return this.getBitcoinPrivateKeychain().neutered() }   /** * Get the root node for the identity public keychain * @return {String} base58-encoding of the public node */ getIdentityPublicKeychain(): BIP32 { return this.getIdentityPrivateKeychain().neutered() }   static getNodeFromBitcoinKeychain( keychainBase58: string, addressIndex: number, chainType: string = EXTERNAL_ADDRESS ): BIP32 { let chain if (chainType === EXTERNAL_ADDRESS) { chain = 0 } else if (chainType === CHANGE_ADDRESS) { chain = 1 } else { throw new Error('Invalid chain type') } const keychain = bip32.fromBase58(keychainBase58)   return keychain.derive(chain).derive(addressIndex) }   /** * Get a bitcoin address given a base-58 encoded bitcoin node * (usually called the account node) * @param {String} keychainBase58 - base58-encoding of the node * @param {number} addressIndex - index of the address to get * @param {String} chainType - either 'EXTERNAL_ADDRESS' (for a * "receive" address) or 'CHANGE_ADDRESS' * @return {String} the address */ static getAddressFromBitcoinKeychain(keychainBase58: string, addressIndex: number, chainType: string = EXTERNAL_ADDRESS): string { return BlockstackWallet.getAddressFromBIP32Node(BlockstackWallet .getNodeFromBitcoinKeychain(keychainBase58, addressIndex, chainType)) }   /** * Get a ECDSA private key hex-string for an application-specific * address. * @param {String} appsNodeKey - the base58-encoded private key for * applications node (the `appsNodeKey` return in getIdentityKeyPair()) * @param {String} salt - a string, used to salt the * application-specific addresses * @param {String} appDomain - the appDomain to generate a key for * @return {String} the private key hex-string. this will be a 64 * character string */ static getLegacyAppPrivateKey(appsNodeKey: string, salt: string, appDomain: string): string { const hash = crypto .createHash('sha256') .update(`${appDomain}${salt}`) .digest('hex') const appIndex = hashCode(hash) const appNode = bip32.fromBase58(appsNodeKey).deriveHardened(appIndex) return getNodePrivateKey(appNode).slice(0, 64) }   static getAddressFromBIP32Node(node: BIP32) { return bitcoin.payments.p2pkh({ pubkey: node.publicKey }).address }   /** * Get a ECDSA private key hex-string for an application-specific * address. * @param {String} appsNodeKey - the base58-encoded private key for * applications node (the `appsNodeKey` return in getIdentityKeyPair()) * @param {String} salt - a string, used to salt the * application-specific addresses * @param {String} appDomain - the appDomain to generate a key for * @return {String} the private key hex-string. this will be a 64 * character string */ static getAppPrivateKey(appsNodeKey: string, salt: string, appDomain: string): string { const hash = crypto .createHash('sha256') .update(`${appDomain}${salt}`) .digest('hex') const appIndexHexes: string[] = [] // note: there's hardcoded numbers here, precisely because I want this // code to be very specific to the derivation paths we expect. if (hash.length !== 64) { throw new Error(`Unexpected app-domain hash length of ${hash.length}`) } for (let i = 0; i < 11; i++) { // split the hash into 3-byte chunks // because child nodes can only be up to 2^31, // and we shouldn't deal in partial bytes. appIndexHexes.push(hash.slice(i * 6, i * 6 + 6)) } let appNode = bip32.fromBase58(appsNodeKey) appIndexHexes.forEach((hex) => { if (hex.length > 6) { throw new Error('Invalid hex string length') } appNode = appNode.deriveHardened(parseInt(hex, 16)) }) return getNodePrivateKey(appNode).slice(0, 64) }   /** * Get the keypair information for a given identity index. This * information is used to obtain the private key for an identity address * and derive application specific keys for that address. * @param {number} addressIndex - the identity index * @param {boolean} alwaysUncompressed - if true, always return a * private-key hex string corresponding to the uncompressed address * @return {Object} an IdentityKeyPair type object with keys: * .key {String} - the private key hex-string * .keyID {String} - the public key hex-string * .address {String} - the identity address * .appsNodeKey {String} - the base-58 encoding of the applications node * .salt {String} - the salt used for creating app-specific addresses */ getIdentityKeyPair(addressIndex: number, alwaysUncompressed: boolean = false): IdentityKeyPair { const identityNode = this.getIdentityAddressNode(addressIndex)   const address = BlockstackWallet.getAddressFromBIP32Node(identityNode) let identityKey = getNodePrivateKey(identityNode) if (alwaysUncompressed && identityKey.length === 66) { identityKey = identityKey.slice(0, 64) }   const identityKeyID = getNodePublicKey(identityNode) const appsNodeKey = BlockstackWallet.getAppsNode(identityNode).toBase58() const salt = this.getIdentitySalt() const keyPair = { key: identityKey, keyID: identityKeyID, address, appsNodeKey, salt } return keyPair } }  </pre></td></tr> </table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Fri Apr 12 2019 16:27:32 GMT-0400 (EDT) </div> </div> <script src="../prettify.js"></script> <script> window.onload = function () { if (typeof prettyPrint === 'function') { prettyPrint(); } }; </script> <script src="../sorter.js"></script> <script src="../block-navigation.js"></script> </body> </html>