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"use strict";
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Utils = void 0;
const algosdk_1 = __importDefault(require("algosdk"));
const stellar_sdk_1 = __importDefault(require("stellar-sdk"));
const hex = __importStar(require("@stablelib/hex"));
const nacl = __importStar(require("tweetnacl"));
const hi_base32_1 = __importDefault(require("hi-base32"));
const js_sha512_1 = __importDefault(require("js-sha512"));
const lodash_1 = __importDefault(require("lodash"));
const keyPair_1 = require("./keyPair");
const seedEncoding_1 = require("./seedEncoding");
const algoNacl = __importStar(require("algosdk/dist/cjs/src/nacl/naclWrappers"));
const encoding = __importStar(require("algosdk/dist/cjs/src/encoding/encoding"));
const sdk_core_1 = require("@bitgo/sdk-core");
const ALGORAND_CHECKSUM_BYTE_LENGTH = 4;
const ALGORAND_SEED_LENGTH = 58;
const ALGORAND_SEED_BYTE_LENGTH = 36;
const ALGORAND_TRANSACTION_LENGTH = 52;
const SEED_BYTES_LENGTH = 32;
/**
* Determines whether the string is only composed of hex chars.
*
* @param {string} maybe The string to be validated.
* @returns {boolean} true if the string consists of only hex characters, otherwise false.
*/
function allHexChars(maybe) {
return /^([0-9a-f]{2})+$/i.test(maybe);
}
/**
* ConcatArrays takes two array and returns a joint array of both
*
* @param a {Uint8Array} first array to concat
* @param b {Uint8Array} second array
* @returns {Uint8Array} a new array containing all elements of 'a' followed by all elements of 'b'
*/
function concatArrays(a, b) {
const c = new Uint8Array(a.length + b.length);
c.set(a);
c.set(b, a.length);
return c;
}
class Utils {
/** @inheritdoc */
isValidAddress(address) {
return algosdk_1.default.isValidAddress(address);
}
/** @inheritdoc */
isValidTransactionId(txId) {
if (txId.length !== 104) {
return false;
}
return allHexChars(txId);
}
/** @inheritdoc */
isValidPublicKey(key) {
return (0, sdk_core_1.isValidEd25519PublicKey)(key);
}
/** @inheritdoc */
isValidPrivateKey(key) {
return (0, sdk_core_1.isValidEd25519SecretKey)(key);
}
/**
* Returns an hex string of the given buffer
*
* @param {Uint8Array} buffer - the buffer to be converted to hex
* @returns {string} - the hex value
*/
toHex(buffer) {
return hex.encode(buffer, true);
}
/** @inheritdoc */
isValidSignature(signature) {
throw new sdk_core_1.NotImplementedError('isValidSignature not implemented.');
}
/** @inheritdoc */
isValidBlockId(hash) {
throw new sdk_core_1.NotImplementedError('hash not implemented.');
}
/**
* Compare two Keys
*
* @param {Uint8Array} key1 - key to be compare
* @param {Uint8Array} key2 - key to be compare
* @returns {boolean} - returns true if both keys are equal
*/
areKeysEqual(key1, key2) {
return nacl.verify(key1, key2);
}
/**
* Returns a Uint8Array of the given hex string
*
* @param {string} str - the hex string to be converted
* @returns {string} - the Uint8Array value
*/
toUint8Array(str) {
return Buffer.from(str, 'hex');
}
/**
* Determines whether a seed is valid.
*
* @param {string} seed - the seed to be validated
* @returns {boolean} - true if the seed is valid
*/
isValidSeed(seed) {
if (typeof seed !== 'string')
return false;
if (seed.length !== ALGORAND_SEED_LENGTH)
return false;
// Try to decode
let decoded;
try {
decoded = this.decodeSeed(seed);
}
catch (e) {
return false;
}
// Compute checksum
const checksum = new Uint8Array(js_sha512_1.default.sha512_256.array(decoded.seed).slice(SEED_BYTES_LENGTH - ALGORAND_CHECKSUM_BYTE_LENGTH, SEED_BYTES_LENGTH));
// Check if the checksum matches the one from the decoded seed
return lodash_1.default.isEqual(checksum, decoded.checksum);
}
/**
* Encode an algo seed
*
* @param {Buffer} secretKey - the valid secretKey .
* @returns {string} - the seed to be validated.
*/
encodeSeed(secretKey) {
// get seed
const seed = secretKey.slice(0, SEED_BYTES_LENGTH);
// compute checksum
const checksum = Buffer.from(js_sha512_1.default.sha512_256.array(seed).slice(SEED_BYTES_LENGTH - ALGORAND_CHECKSUM_BYTE_LENGTH, SEED_BYTES_LENGTH));
const encodedSeed = hi_base32_1.default.encode(concatArrays(seed, checksum));
return encodedSeed.toString().slice(0, ALGORAND_SEED_LENGTH); // removing the extra '===='
}
/**
* decodeSeed decodes an algo seed
*
* Decoding algo seed is same as decoding address.
* Latest version of algo sdk (1.9, at this writing) does not expose explicit method for decoding seed.
* Parameter is decoded and split into seed and checksum.
*
* @param {string} seed - hex or base64 encoded seed to be validated
* @returns {Seed} - validated object Seed
*/
decodeSeed(seed) {
// try to decode
const decoded = hi_base32_1.default.decode.asBytes(seed);
// Sanity check
if (decoded.length !== ALGORAND_SEED_BYTE_LENGTH)
throw new Error('seed seems to be malformed');
return {
seed: new Uint8Array(decoded.slice(0, ALGORAND_SEED_BYTE_LENGTH - ALGORAND_CHECKSUM_BYTE_LENGTH)),
checksum: new Uint8Array(decoded.slice(SEED_BYTES_LENGTH, ALGORAND_SEED_BYTE_LENGTH)),
};
}
/**
* Verifies if signature for message is valid.
*
* @param pub {Uint8Array} public key
* @param message {Uint8Array} signed message
* @param signature {Buffer} signature to verify
* @returns {Boolean} true if signature is valid.
*/
verifySignature(message, signature, pub) {
return nacl.sign.detached.verify(message, signature, pub);
}
/**
* Transforms an Ed25519 public key into an algorand address.
*
* @param {Uint8Array} pk The Ed25519 public key.
* @see https://developer.algorand.org/docs/features/accounts/#transformation-public-key-to-algorand-address
*
* @returns {string} The algorand address.
*/
publicKeyToAlgoAddress(pk) {
return new keyPair_1.KeyPair({ pub: Buffer.from(pk).toString('hex') }).getAddress();
}
/**
Transforms a decrypted Ed25519 private key into an algorand address.
@param {string} privateKey The Ed25519 private key.
@returns {string} The algorand address.
**/
privateKeyToAlgoAddress(privateKey) {
// Derive the account from the private key
const keypair = new keyPair_1.KeyPair({ prv: privateKey });
return keypair.getAddress();
}
/**
* Checks if a unsigned algo transaction can be decoded.
*
* @param {Uint8Array} txn The encoded unsigned transaction.
* @returns {boolean} true if the transaction can be decoded, otherwise false
*/
isDecodableUnsignedAlgoTxn(txn) {
try {
algosdk_1.default.decodeUnsignedTransaction(txn);
return true;
}
catch {
return false;
}
}
/**
* Checks if a signed algo transaction can be decoded.
*
* @param {Uint8Array} txn The encoded signed transaction.
* @returns {boolean} true if the transaction can be decoded, otherwise false
*/
isDecodableSignedTransaction(txn) {
try {
algosdk_1.default.decodeSignedTransaction(txn);
return true;
}
catch {
return false;
}
}
/**
* Decodes a signed or unsigned algo transaction.
*
* @param {Uint8Array | string} txnBytes The encoded unsigned or signed txn.
* @returns {EncodedTx} The decoded transaction.
*/
decodeAlgoTxn(txnBytes) {
let buffer = typeof txnBytes === 'string'
? Buffer.from(txnBytes, allHexChars(txnBytes) ? 'hex' : 'base64')
: Buffer.from(txnBytes);
// In order to maintain backward compatibility with old keyreg transactions encoded with
// forked algosdk 1.2.0 (https://github.com/BitGo/algosdk-bitgo),
// the relevant information is extracted and parsed following the latest algosdk
// release standard.
// This way we can decode transactions successfully by still maintaining backward compatibility.
const decodedTx = encoding.decode(buffer);
if (decodedTx.txn &&
decodedTx.txn.type === 'keyreg' &&
decodedTx.txn.votefst &&
decodedTx.txn.votelst &&
decodedTx.txn.votekd) {
decodedTx.txn.votekey = decodedTx.txn.votekey || decodedTx.msig.subsig[0].pk;
decodedTx.txn.selkey = decodedTx.txn.selkey || decodedTx.msig.subsig[0].pk;
buffer = decodedTx.msig || decodedTx.sig ? encoding.encode(decodedTx) : encoding.encode(decodedTx.txn);
}
try {
return this.tryToDecodeUnsignedTransaction(buffer);
}
catch {
// Ignore error to try different format
}
try {
return this.tryToDecodeSignedTransaction(buffer);
}
catch {
throw new sdk_core_1.InvalidTransactionError('Transaction cannot be decoded');
}
}
/**
* Try to decode a signed Algo transaction
* @param buffer the encoded transaction
* @returns { EncodedTx } the decoded signed transaction
* @throws error if it is not a valid encoded signed transaction
*/
tryToDecodeSignedTransaction(buffer) {
// TODO: Replace with
// return algosdk.Transaction.from_obj_for_encoding(algosdk.decodeSignedTransaction(buffer).txn);
// see: https://github.com/algorand/js-algorand-sdk/issues/364
// "...some parts of the codebase treat the output of Transaction.from_obj_for_encoding as EncodedTransaction.
// They need to be fixed(or we at least need to make it so Transaction conforms to EncodedTransaction)."
const tx = algosdk_1.default.decodeSignedTransaction(buffer);
const signers = [];
const signedBy = [];
if (tx.msig && tx.msig.subsig) {
for (const sig of tx.msig.subsig) {
const addr = algosdk_1.default.encodeAddress(sig.pk);
signers.push(addr);
if (sig.s) {
signedBy.push(addr);
}
}
}
return {
rawTransaction: new Uint8Array(buffer),
txn: tx.txn,
signed: true,
signers: signers,
signedBy: signedBy,
};
}
/**
* Try to decode an unsigned Algo transaction
* @param buffer the encoded transaction
* @returns {EncodedTx} the decoded unsigned transaction
* @throws error if it is not a valid encoded unsigned transaction
*/
tryToDecodeUnsignedTransaction(buffer) {
const txn = algosdk_1.default.decodeUnsignedTransaction(buffer);
return {
rawTransaction: new Uint8Array(buffer),
txn,
signed: false,
};
}
/*
* encodeObj takes a javascript object and returns its msgpack encoding
* Note that the encoding sorts the fields alphabetically
*
* @param {Record<string | number | symbol, any>} obj js obj
* @returns {Uint8Array} Uint8Array binary representation
*/
encodeObj(obj) {
return algosdk_1.default.encodeObj(obj);
}
/**
* decodeObj takes a Uint8Array and returns its javascript obj
* @param o - Uint8Array to decode
* @returns object
*/
decodeObj(o) {
return algosdk_1.default.decodeObj(o);
}
/**
* secretKeyToMnemonic takes an Algorant secret key and returns the corresponding mnemonic
*
* @param sk - Algorant secret key
* @return Secret key is associated mnemonic
*/
secretKeyToMnemonic(sk) {
const skValid = Buffer.from(sk.toString('hex'));
if (!this.isValidPrivateKey(skValid.toString('hex'))) {
throw new sdk_core_1.InvalidKey(`The secret key: ${sk.toString('hex')} is invalid`);
}
const skUnit8Array = Buffer.from(sk);
return algosdk_1.default.secretKeyToMnemonic(skUnit8Array);
}
/**
* seedFromMnemonic converts a mnemonic generated using this library into the source key used to create it
* It returns an error if the passed mnemonic has an incorrect checksum, if the number of words is unexpected, or if one
* of the passed words is not found in the words list
*
* @param mnemonic - 25 words mnemonic
* @returns 32 bytes long seed
*/
seedFromMnemonic(mnemonic) {
return algosdk_1.default.mnemonicToMasterDerivationKey(mnemonic);
}
/**
* keyPairFromSeed generates an object with secretKey and publicKey using the algosdk
* @param seed 32 bytes long seed
* @returns KeyPair
*/
keyPairFromSeed(seed) {
const mn = this.mnemonicFromSeed(seed);
const base64PrivateKey = algosdk_1.default.mnemonicToSecretKey(mn).sk;
return this.createKeyPair(base64PrivateKey);
}
/**
* Generate a new `KeyPair` object from the given private key.
*
* @param base64PrivateKey 64 bytes long privateKey
* @returns KeyPair
*/
createKeyPair(base64PrivateKey) {
const sk = base64PrivateKey.slice(0, 32);
return new keyPair_1.KeyPair({ prv: Buffer.from(sk).toString('hex') });
}
/**
* decodePrivateKey generates a seed with a mnemonic and using algosdk.
*
* @param seed 32 bytes long seed
* @returns mnemonic - 25 words mnemonic - 25 words mnemonic
*/
mnemonicFromSeed(seed) {
return algosdk_1.default.masterDerivationKeyToMnemonic(seed);
}
/**
* Validates the key with the stellar-sdk
*
* @param publicKey
* @returns boolean
*/
isValidEd25519PublicKeyStellar(publicKey) {
return stellar_sdk_1.default.StrKey.isValidEd25519PublicKey(publicKey);
}
/**
* Decodes the key with the stellar-sdk
*
* @param publicKey
* @returns Buffer
*/
decodeEd25519PublicKeyStellar(publicKey) {
return stellar_sdk_1.default.StrKey.decodeEd25519PublicKey(publicKey);
}
/**
* Convert a stellar seed to algorand encoding
*
* @param seed
* @returns string the encoded seed
*/
convertFromStellarSeed(seed) {
return seedEncoding_1.SeedEncoding.encode(stellar_sdk_1.default.StrKey.decodeEd25519SecretSeed(seed));
}
/**
* Returns an address encoded with algosdk
*
* @param addr
* @returns string
*/
encodeAddress(addr) {
return algosdk_1.default.encodeAddress(addr);
}
/**
* Return an address decoded with algosdk
*
* @param addr
* @returns Address
*/
decodeAddress(addr) {
return algosdk_1.default.decodeAddress(addr);
}
/**
* Converts an address into an ALGO one
* If the given data is a Stellar address or public key, it is converted to ALGO address.
*
* @param addressOrPubKey an ALGO address, or an Stellar address or public key
* @returns address algo address string
*/
stellarAddressToAlgoAddress(addressOrPubKey) {
// we have an Algorand address
if (this.isValidAddress(addressOrPubKey)) {
return addressOrPubKey;
}
// we have a stellar key
if (this.isValidEd25519PublicKeyStellar(addressOrPubKey)) {
const stellarPub = this.decodeEd25519PublicKeyStellar(addressOrPubKey);
const algoAddress = this.encodeAddress(stellarPub);
if (this.isValidAddress(algoAddress)) {
return algoAddress;
}
throw new Error('Cannot convert Stellar address to an Algorand address via pubkey.');
}
throw new Error('Neither an Algorand address nor a stellar pubkey.');
}
/**
* multisigAddress takes multisig metadata (preimage) and returns the corresponding human readable Algorand address.
*
* @param {number} version mutlisig version
* @param {number} threshold multisig threshold
* @param {string[]} addrs list of Algorand addresses
* @returns {string} human readable Algorand address.
*/
multisigAddress(version, threshold, addrs) {
return algosdk_1.default.multisigAddress({
version,
threshold,
addrs,
});
}
/**
* generateAccount generates un account with a secretKey and an address
*
* Function has not params
* @returns Account
*/
generateAccount() {
return algosdk_1.default.generateAccount();
}
generateAccountFromSeed(seed) {
const keys = nacl.sign.keyPair.fromSeed(seed);
return {
addr: algosdk_1.default.encodeAddress(keys.publicKey),
sk: keys.secretKey,
};
}
/**
* Generates Tx ID from an encoded multisig transaction
*
* This is done because of a change made on version 1.10.1 on algosdk so method txID() only supports SignedTransaction type.
* (https://github.com/algorand/js-algorand-sdk/blob/develop/CHANGELOG.md#1101)
*
* @param {string} txBase64 - encoded base64 multisig transaction
* @returns {string} - transaction ID
*/
getMultisigTxID(txBase64) {
const txBytes = Buffer.from(txBase64, 'base64');
const decodeSignTx = algosdk_1.default.decodeSignedTransaction(txBytes);
const wellFormedDecodedSignTx = decodeSignTx.txn.get_obj_for_encoding();
const txForEncoding = { msig: decodeSignTx.msig, txn: wellFormedDecodedSignTx };
const en_msg = encoding.encode(txForEncoding);
const tag = Buffer.from([84, 88]);
const gh = Buffer.from(concatArrays(tag, en_msg));
const hash = Buffer.from(algoNacl.genericHash(gh));
return hi_base32_1.default.encode(hash).slice(0, ALGORAND_TRANSACTION_LENGTH);
}
/**
* Determines if a given transaction data is to enable or disable a token
* @param amount the amount in transaction
* @param from the originated address
* @param to the target address
* @param closeRemainderTo (optional) address to send remaining units in originated address
* @returns 'enableToken' or 'disableToken'
*/
getTokenTxType(amount, from, to, closeRemainderTo) {
let type = 'transferToken';
if (amount === '0' && from === to) {
type = !closeRemainderTo ? 'enableToken' : 'disableToken';
}
return type;
}
/**
* Validate if the key is a valid base64 string
* @param key the key to validate
*/
validateBase64(key) {
if (!key || typeof key !== 'string') {
throw new Error('Invalid base64 string');
}
const base64RegExp = /^(?:[a-zA-Z0-9+\/]{4})*(?:|(?:[a-zA-Z0-9+\/]{3}=)|(?:[a-zA-Z0-9+\/]{2}==)|(?:[a-zA-Z0-9+\/]{1}===))$/;
if (!base64RegExp.test(key)) {
throw new Error('Invalid base64 string');
}
}
}
exports.Utils = Utils;
const utils = new Utils();
exports.default = utils;
//# 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algosdk from 'algosdk';\nimport stellar from 'stellar-sdk';\nimport * as hex from '@stablelib/hex';\nimport * as nacl from 'tweetnacl';\nimport base32 from 'hi-base32';\nimport sha512 from 'js-sha512';\nimport _ from 'lodash';\nimport { Address, EncodedTx, Seed } from './ifaces';\nimport { KeyPair } from './keyPair';\nimport { SeedEncoding } from './seedEncoding';\nimport * as algoNacl from 'algosdk/dist/cjs/src/nacl/naclWrappers';\nimport * as encoding from 'algosdk/dist/cjs/src/encoding/encoding';\nimport {\n  BaseUtils,\n  NotImplementedError,\n  InvalidTransactionError,\n  InvalidKey,\n  isValidEd25519PublicKey,\n  isValidEd25519SecretKey,\n} from '@bitgo/sdk-core';\n\nconst ALGORAND_CHECKSUM_BYTE_LENGTH = 4;\nconst ALGORAND_SEED_LENGTH = 58;\nconst ALGORAND_SEED_BYTE_LENGTH = 36;\nconst ALGORAND_TRANSACTION_LENGTH = 52;\nconst SEED_BYTES_LENGTH = 32;\n\n/**\n * Determines whether the string is only composed of hex chars.\n *\n * @param {string} maybe The string to be validated.\n * @returns {boolean} true if the string consists of only hex characters, otherwise false.\n */\nfunction allHexChars(maybe: string): boolean {\n  return /^([0-9a-f]{2})+$/i.test(maybe);\n}\n\n/**\n * ConcatArrays takes two array and returns a joint array of both\n *\n * @param a {Uint8Array} first array to concat\n * @param b {Uint8Array} second array\n * @returns {Uint8Array} a new array containing all elements of 'a' followed by all elements of 'b'\n */\nfunction concatArrays(a: Uint8Array, b: Uint8Array): Uint8Array {\n  const c = new Uint8Array(a.length + b.length);\n  c.set(a);\n  c.set(b, a.length);\n  return c;\n}\n\nexport class Utils implements BaseUtils {\n  /** @inheritdoc */\n  isValidAddress(address: string): boolean {\n    return algosdk.isValidAddress(address);\n  }\n\n  /** @inheritdoc */\n  isValidTransactionId(txId: string): boolean {\n    if (txId.length !== 104) {\n      return false;\n    }\n\n    return allHexChars(txId);\n  }\n\n  /** @inheritdoc */\n  isValidPublicKey(key: string): boolean {\n    return isValidEd25519PublicKey(key);\n  }\n\n  /** @inheritdoc */\n  isValidPrivateKey(key: string): boolean {\n    return isValidEd25519SecretKey(key);\n  }\n\n  /**\n   * Returns an hex string of the given buffer\n   *\n   * @param {Uint8Array} buffer - the buffer to be converted to hex\n   * @returns {string} - the hex value\n   */\n  toHex(buffer: Uint8Array): string {\n    return hex.encode(buffer, true);\n  }\n\n  /** @inheritdoc */\n  isValidSignature(signature: string): boolean {\n    throw new NotImplementedError('isValidSignature not implemented.');\n  }\n\n  /** @inheritdoc */\n  isValidBlockId(hash: string): boolean {\n    throw new NotImplementedError('hash not implemented.');\n  }\n\n  /**\n   * Compare two Keys\n   *\n   * @param {Uint8Array} key1 - key to be compare\n   * @param {Uint8Array} key2 - key to be compare\n   * @returns {boolean} - returns true if both keys are equal\n   */\n  areKeysEqual(key1: Uint8Array, key2: Uint8Array): boolean {\n    return nacl.verify(key1, key2);\n  }\n\n  /**\n   * Returns a Uint8Array of the given hex string\n   *\n   * @param {string} str - the hex string to be converted\n   * @returns {string} - the Uint8Array value\n   */\n  toUint8Array(str: string): Uint8Array {\n    return Buffer.from(str, 'hex');\n  }\n\n  /**\n   * Determines whether a seed is valid.\n   *\n   * @param {string} seed - the seed to be validated\n   * @returns {boolean} - true if the seed is valid\n   */\n  isValidSeed(seed: string): boolean {\n    if (typeof seed !== 'string') return false;\n\n    if (seed.length !== ALGORAND_SEED_LENGTH) return false;\n\n    // Try to decode\n    let decoded;\n    try {\n      decoded = this.decodeSeed(seed);\n    } catch (e) {\n      return false;\n    }\n\n    // Compute checksum\n    const checksum = new Uint8Array(\n      sha512.sha512_256.array(decoded.seed).slice(SEED_BYTES_LENGTH - ALGORAND_CHECKSUM_BYTE_LENGTH, SEED_BYTES_LENGTH)\n    );\n\n    // Check if the checksum matches the one from the decoded seed\n    return _.isEqual(checksum, decoded.checksum);\n  }\n\n  /**\n   * Encode an algo seed\n   *\n   * @param  {Buffer} secretKey - the valid secretKey .\n   * @returns {string} - the seed to be validated.\n   */\n  encodeSeed(secretKey: Buffer): string {\n    // get seed\n    const seed = secretKey.slice(0, SEED_BYTES_LENGTH);\n    // compute checksum\n    const checksum = Buffer.from(\n      sha512.sha512_256.array(seed).slice(SEED_BYTES_LENGTH - ALGORAND_CHECKSUM_BYTE_LENGTH, SEED_BYTES_LENGTH)\n    );\n    const encodedSeed = base32.encode(concatArrays(seed, checksum));\n\n    return encodedSeed.toString().slice(0, ALGORAND_SEED_LENGTH); // removing the extra '===='\n  }\n\n  /**\n   * decodeSeed decodes an algo seed\n   *\n   * Decoding algo seed is same as decoding address.\n   * Latest version of algo sdk (1.9, at this writing) does not expose explicit method for decoding seed.\n   * Parameter is decoded and split into seed and checksum.\n   *\n   * @param {string} seed - hex or base64 encoded seed to be validated\n   * @returns {Seed} - validated object Seed\n   */\n  decodeSeed(seed: string): Seed {\n    // try to decode\n    const decoded = base32.decode.asBytes(seed);\n\n    // Sanity check\n    if (decoded.length !== ALGORAND_SEED_BYTE_LENGTH) throw new Error('seed seems to be malformed');\n    return {\n      seed: new Uint8Array(decoded.slice(0, ALGORAND_SEED_BYTE_LENGTH - ALGORAND_CHECKSUM_BYTE_LENGTH)),\n      checksum: new Uint8Array(decoded.slice(SEED_BYTES_LENGTH, ALGORAND_SEED_BYTE_LENGTH)),\n    };\n  }\n\n  /**\n   * Verifies if signature for message is valid.\n   *\n   * @param pub {Uint8Array} public key\n   * @param message {Uint8Array} signed message\n   * @param signature {Buffer} signature to verify\n   * @returns {Boolean} true if signature is valid.\n   */\n  verifySignature(message: Uint8Array, signature: Buffer, pub: Uint8Array): boolean {\n    return nacl.sign.detached.verify(message, signature, pub);\n  }\n\n  /**\n   * Transforms an Ed25519 public key into an algorand address.\n   *\n   * @param {Uint8Array} pk The Ed25519 public key.\n   * @see https://developer.algorand.org/docs/features/accounts/#transformation-public-key-to-algorand-address\n   *\n   * @returns {string} The algorand address.\n   */\n  publicKeyToAlgoAddress(pk: Uint8Array): string {\n    return new KeyPair({ pub: Buffer.from(pk).toString('hex') }).getAddress();\n  }\n\n  /**\n   Transforms a decrypted Ed25519 private key into an algorand address.\n   @param {string} privateKey The Ed25519 private key.\n   @returns {string} The algorand address.\n   **/\n  privateKeyToAlgoAddress(privateKey: string): string {\n    // Derive the account from the private key\n    const keypair = new KeyPair({ prv: privateKey });\n    return keypair.getAddress();\n  }\n\n  /**\n   * Checks if a unsigned algo transaction can be decoded.\n   *\n   * @param {Uint8Array} txn The encoded unsigned transaction.\n   * @returns {boolean} true if the transaction can be decoded, otherwise false\n   */\n  protected isDecodableUnsignedAlgoTxn(txn: Uint8Array): boolean {\n    try {\n      algosdk.decodeUnsignedTransaction(txn);\n      return true;\n    } catch {\n      return false;\n    }\n  }\n\n  /**\n   * Checks if a signed algo transaction can be decoded.\n   *\n   * @param {Uint8Array} txn The encoded signed transaction.\n   * @returns {boolean} true if the transaction can be decoded, otherwise false\n   */\n  protected isDecodableSignedTransaction(txn: Uint8Array): boolean {\n    try {\n      algosdk.decodeSignedTransaction(txn);\n      return true;\n    } catch {\n      return false;\n    }\n  }\n\n  /**\n   * Decodes a signed or unsigned algo transaction.\n   *\n   * @param {Uint8Array | string} txnBytes The encoded unsigned or signed txn.\n   * @returns {EncodedTx} The decoded transaction.\n   */\n  decodeAlgoTxn(txnBytes: Uint8Array | string): EncodedTx {\n    let buffer =\n      typeof txnBytes === 'string'\n        ? Buffer.from(txnBytes, allHexChars(txnBytes) ? 'hex' : 'base64')\n        : Buffer.from(txnBytes);\n\n    // In order to maintain backward compatibility with old keyreg transactions encoded with\n    // forked algosdk 1.2.0 (https://github.com/BitGo/algosdk-bitgo),\n    // the relevant information is extracted and parsed following the latest algosdk\n    // release standard.\n    // This way we can decode transactions successfully by still maintaining backward compatibility.\n    const decodedTx = encoding.decode(buffer);\n    if (\n      decodedTx.txn &&\n      decodedTx.txn.type === 'keyreg' &&\n      decodedTx.txn.votefst &&\n      decodedTx.txn.votelst &&\n      decodedTx.txn.votekd\n    ) {\n      decodedTx.txn.votekey = decodedTx.txn.votekey || decodedTx.msig.subsig[0].pk;\n      decodedTx.txn.selkey = decodedTx.txn.selkey || decodedTx.msig.subsig[0].pk;\n      buffer = decodedTx.msig || decodedTx.sig ? encoding.encode(decodedTx) : encoding.encode(decodedTx.txn);\n    }\n\n    try {\n      return this.tryToDecodeUnsignedTransaction(buffer);\n    } catch {\n      // Ignore error to try different format\n    }\n\n    try {\n      return this.tryToDecodeSignedTransaction(buffer);\n    } catch {\n      throw new InvalidTransactionError('Transaction cannot be decoded');\n    }\n  }\n\n  /**\n   * Try to decode a signed Algo transaction\n   * @param buffer the encoded transaction\n   * @returns { EncodedTx } the decoded signed transaction\n   * @throws error if it is not a valid encoded signed transaction\n   */\n  tryToDecodeSignedTransaction(buffer: Buffer): EncodedTx {\n    // TODO: Replace with\n    // return algosdk.Transaction.from_obj_for_encoding(algosdk.decodeSignedTransaction(buffer).txn);\n    // see: https://github.com/algorand/js-algorand-sdk/issues/364\n    // \"...some parts of the codebase treat the output of Transaction.from_obj_for_encoding as EncodedTransaction.\n    // They need to be fixed(or we at least need to make it so Transaction conforms to EncodedTransaction).\"\n    const tx = algosdk.decodeSignedTransaction(buffer);\n\n    const signers: string[] = [];\n    const signedBy: string[] = [];\n    if (tx.msig && tx.msig.subsig) {\n      for (const sig of tx.msig.subsig) {\n        const addr = algosdk.encodeAddress(sig.pk);\n        signers.push(addr);\n        if (sig.s) {\n          signedBy.push(addr);\n        }\n      }\n    }\n\n    return {\n      rawTransaction: new Uint8Array(buffer),\n      txn: tx.txn,\n      signed: true,\n      signers: signers,\n      signedBy: signedBy,\n    };\n  }\n\n  /**\n   * Try to decode an unsigned Algo transaction\n   * @param buffer the encoded transaction\n   * @returns {EncodedTx} the decoded unsigned transaction\n   * @throws error if it is not a valid encoded unsigned transaction\n   */\n  tryToDecodeUnsignedTransaction(buffer: Buffer): EncodedTx {\n    const txn = algosdk.decodeUnsignedTransaction(buffer);\n    return {\n      rawTransaction: new Uint8Array(buffer),\n      txn,\n      signed: false,\n    };\n  }\n\n  /*\n   * encodeObj takes a javascript object and returns its msgpack encoding\n   * Note that the encoding sorts the fields alphabetically\n   *\n   * @param {Record<string | number | symbol, any>} obj js obj\n   * @returns {Uint8Array} Uint8Array binary representation\n   */\n  encodeObj(obj: Record<string | number | symbol, any>): Uint8Array {\n    return algosdk.encodeObj(obj);\n  }\n\n  /**\n   * decodeObj takes a Uint8Array and returns its javascript obj\n   * @param o - Uint8Array to decode\n   * @returns object\n   */\n  decodeObj(o: ArrayLike<number>): unknown {\n    return algosdk.decodeObj(o);\n  }\n\n  /**\n   * secretKeyToMnemonic takes an Algorant secret key and returns the corresponding mnemonic\n   *\n   * @param sk - Algorant secret key\n   * @return Secret key is associated mnemonic\n   */\n  secretKeyToMnemonic(sk: Buffer): string {\n    const skValid = Buffer.from(sk.toString('hex'));\n    if (!this.isValidPrivateKey(skValid.toString('hex'))) {\n      throw new InvalidKey(`The secret key: ${sk.toString('hex')} is invalid`);\n    }\n    const skUnit8Array = Buffer.from(sk);\n    return algosdk.secretKeyToMnemonic(skUnit8Array);\n  }\n\n  /**\n   * seedFromMnemonic converts a mnemonic generated using this library into the source key used to create it\n   * It returns an error if the passed mnemonic has an incorrect checksum, if the number of words is unexpected, or if one\n   * of the passed words is not found in the words list\n   *\n   * @param mnemonic - 25 words mnemonic\n   * @returns 32 bytes long seed\n   */\n  seedFromMnemonic(mnemonic: string): Uint8Array {\n    return algosdk.mnemonicToMasterDerivationKey(mnemonic);\n  }\n\n  /**\n   * keyPairFromSeed generates an object with secretKey and publicKey using the algosdk\n   * @param seed 32 bytes long seed\n   * @returns KeyPair\n   */\n  keyPairFromSeed(seed: Uint8Array): KeyPair {\n    const mn = this.mnemonicFromSeed(seed);\n    const base64PrivateKey = algosdk.mnemonicToSecretKey(mn).sk;\n    return this.createKeyPair(base64PrivateKey);\n  }\n\n  /**\n   * Generate a new `KeyPair` object from the given private key.\n   *\n   * @param base64PrivateKey 64 bytes long privateKey\n   * @returns KeyPair\n   */\n  protected createKeyPair(base64PrivateKey: Uint8Array): KeyPair {\n    const sk = base64PrivateKey.slice(0, 32);\n    return new KeyPair({ prv: Buffer.from(sk).toString('hex') });\n  }\n\n  /**\n   * decodePrivateKey generates a seed with a mnemonic and using algosdk.\n   *\n   * @param seed 32 bytes long seed\n   * @returns mnemonic - 25 words mnemonic - 25 words mnemonic\n   */\n  protected mnemonicFromSeed(seed: Uint8Array): string {\n    return algosdk.masterDerivationKeyToMnemonic(seed);\n  }\n\n  /**\n   * Validates the key with the stellar-sdk\n   *\n   * @param publicKey\n   * @returns boolean\n   */\n  protected isValidEd25519PublicKeyStellar(publicKey: string): boolean {\n    return stellar.StrKey.isValidEd25519PublicKey(publicKey);\n  }\n\n  /**\n   * Decodes the key with the stellar-sdk\n   *\n   * @param publicKey\n   * @returns Buffer\n   */\n  protected decodeEd25519PublicKeyStellar(publicKey: string): Buffer {\n    return stellar.StrKey.decodeEd25519PublicKey(publicKey);\n  }\n\n  /**\n   * Convert a stellar seed to algorand encoding\n   *\n   * @param seed\n   * @returns string the encoded seed\n   */\n  convertFromStellarSeed(seed: string): string {\n    return SeedEncoding.encode(stellar.StrKey.decodeEd25519SecretSeed(seed));\n  }\n\n  /**\n   * Returns an address encoded with algosdk\n   *\n   * @param addr\n   * @returns string\n   */\n  encodeAddress(addr: Uint8Array): string {\n    return algosdk.encodeAddress(addr);\n  }\n\n  /**\n   * Return an address decoded with algosdk\n   *\n   * @param addr\n   * @returns Address\n   */\n  decodeAddress(addr: string): Address {\n    return algosdk.decodeAddress(addr);\n  }\n\n  /**\n   * Converts an address into an ALGO one\n   * If the given data is a Stellar address or public key, it is converted to ALGO address.\n   *\n   * @param addressOrPubKey an ALGO address, or an Stellar address or public key\n   * @returns address algo address string\n   */\n  stellarAddressToAlgoAddress(addressOrPubKey: string): string {\n    // we have an Algorand address\n    if (this.isValidAddress(addressOrPubKey)) {\n      return addressOrPubKey;\n    }\n    // we have a stellar key\n    if (this.isValidEd25519PublicKeyStellar(addressOrPubKey)) {\n      const stellarPub = this.decodeEd25519PublicKeyStellar(addressOrPubKey);\n      const algoAddress = this.encodeAddress(stellarPub);\n      if (this.isValidAddress(algoAddress)) {\n        return algoAddress;\n      }\n      throw new Error('Cannot convert Stellar address to an Algorand address via pubkey.');\n    }\n    throw new Error('Neither an Algorand address nor a stellar pubkey.');\n  }\n\n  /**\n   * multisigAddress takes multisig metadata (preimage) and returns the corresponding human readable Algorand address.\n   *\n   * @param {number} version mutlisig version\n   * @param {number} threshold multisig threshold\n   * @param {string[]} addrs list of Algorand addresses\n   * @returns {string} human readable Algorand address.\n   */\n  multisigAddress(version: number, threshold: number, addrs: string[]): string {\n    return algosdk.multisigAddress({\n      version,\n      threshold,\n      addrs,\n    });\n  }\n\n  /**\n   * generateAccount generates un account with a secretKey and an address\n   *\n   * Function has not params\n   * @returns Account\n   */\n  generateAccount(): algosdk.Account {\n    return algosdk.generateAccount();\n  }\n\n  generateAccountFromSeed(seed: Uint8Array): algosdk.Account {\n    const keys = nacl.sign.keyPair.fromSeed(seed);\n    return {\n      addr: algosdk.encodeAddress(keys.publicKey),\n      sk: keys.secretKey,\n    };\n  }\n\n  /**\n   * Generates Tx ID from an encoded multisig transaction\n   *\n   * This is done because of a change made on version 1.10.1 on algosdk so method txID() only supports SignedTransaction type.\n   * (https://github.com/algorand/js-algorand-sdk/blob/develop/CHANGELOG.md#1101)\n   *\n   * @param {string} txBase64 - encoded base64 multisig transaction\n   * @returns {string} - transaction ID\n   */\n  getMultisigTxID(txBase64: string): string {\n    const txBytes = Buffer.from(txBase64, 'base64');\n    const decodeSignTx = algosdk.decodeSignedTransaction(txBytes);\n    const wellFormedDecodedSignTx = decodeSignTx.txn.get_obj_for_encoding();\n    const txForEncoding = { msig: decodeSignTx.msig, txn: wellFormedDecodedSignTx };\n    const en_msg = encoding.encode(txForEncoding);\n    const tag = Buffer.from([84, 88]);\n    const gh = Buffer.from(concatArrays(tag, en_msg));\n    const hash = Buffer.from(algoNacl.genericHash(gh));\n    return base32.encode(hash).slice(0, ALGORAND_TRANSACTION_LENGTH);\n  }\n\n  /**\n   * Determines if a given transaction data is to enable or disable a token\n   * @param amount the amount in transaction\n   * @param from the originated address\n   * @param to the target address\n   * @param closeRemainderTo (optional) address to send remaining units in originated address\n   * @returns 'enableToken' or 'disableToken'\n   */\n  getTokenTxType(amount: string, from: string, to: string, closeRemainderTo?: string): string {\n    let type = 'transferToken';\n    if (amount === '0' && from === to) {\n      type = !closeRemainderTo ? 'enableToken' : 'disableToken';\n    }\n    return type;\n  }\n\n  /**\n   * Validate if the key is a valid base64 string\n   * @param key the key to validate\n   */\n  validateBase64(key: string): void {\n    if (!key || typeof key !== 'string') {\n      throw new Error('Invalid base64 string');\n    }\n    const base64RegExp =\n      /^(?:[a-zA-Z0-9+\\/]{4})*(?:|(?:[a-zA-Z0-9+\\/]{3}=)|(?:[a-zA-Z0-9+\\/]{2}==)|(?:[a-zA-Z0-9+\\/]{1}===))$/;\n    if (!base64RegExp.test(key)) {\n      throw new Error('Invalid base64 string');\n    }\n  }\n}\n\nconst utils = new Utils();\n\nexport default utils;\n"]}Выполнить команду
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