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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/@bitgo/sdk-coin-icp/dist/src/lib
Просмотр файла: utils.js
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exports.Utils = void 0;
const sdk_core_1 = require("@bitgo/sdk-core");
const principal_1 = require("@dfinity/principal");
const agent = __importStar(require("@dfinity/agent"));
const crypto_1 = __importDefault(require("crypto"));
const crc_32_1 = __importDefault(require("crc-32"));
const iface_1 = require("./iface");
const keyPair_1 = require("./keyPair");
const messageCompiled = require('../../resources/messageCompiled');
const { encode, decode, Encoder } = require('cbor-x/index-no-eval'); // The "cbor-x" library is used here because it supports modern features like BigInt. do not replace it with "cbor as "cbor" is not compatible with Rust's serde_cbor when handling big numbers.
const js_sha256_1 = __importDefault(require("js-sha256"));
const bignumber_js_1 = __importDefault(require("bignumber.js"));
const secp256k1_1 = require("@noble/curves/secp256k1");
//custom encoder that avoids tagging
const encoder = new Encoder({
structuredClone: false,
useToJSON: false,
mapsAsObjects: false,
largeBigIntToFloat: false,
});
class Utils {
constructor() {
this.signPayload = (privateKey, payloadHex) => {
const privateKeyBytes = Buffer.from(privateKey, 'hex');
const payloadHash = crypto_1.default.createHash('sha256').update(Buffer.from(payloadHex, 'hex')).digest('hex');
const signature = secp256k1_1.secp256k1.sign(payloadHash, privateKeyBytes);
const r = Buffer.from(signature.r.toString(16).padStart(64, '0'), 'hex');
const s = Buffer.from(signature.s.toString(16).padStart(64, '0'), 'hex');
return Buffer.concat([r, s]).toString('hex');
};
}
/** @inheritdoc */
isValidSignature(signature) {
throw new sdk_core_1.MethodNotImplementedError();
}
/**
* gets the fee data of this transaction.
*/
feeData() {
return '-10000'; // fee is static for ICP transactions as per ICP documentation
}
/**
* Checks if the provided address is a valid ICP address.
*
* @param {string} address - The address to validate.
* @returns {boolean} - Returns `true` if the address is valid, otherwise `false`.
*/
isValidAddress(address) {
const rootAddress = this.validateMemoAndReturnRootAddress(address);
return rootAddress !== undefined && this.isValidHash(rootAddress);
}
/**
* Validates the memo ID in the address and returns the root address.
*
* @param {string} address - The address to validate and extract the root address from.
* @returns {string | undefined} - The root address if valid, otherwise `undefined`.
*/
validateMemoAndReturnRootAddress(address) {
if (!address) {
return undefined;
}
const [rootAddress, memoId] = address.split('?memoId=');
if (memoId && this.validateMemo(BigInt(memoId))) {
return rootAddress;
}
return address;
}
/**
* Checks if the provided hex string is a valid public key.
*
* A valid public key can be either compressed or uncompressed:
* - Compressed public keys are 33 bytes long and start with either 0x02 or 0x03.
* - Uncompressed public keys are 65 bytes long and start with 0x04.
*
* @param {string} hexStr - The hex string representation of the public key to validate.
* @returns {boolean} - Returns `true` if the hex string is a valid public key, otherwise `false`.
*/
isValidPublicKey(hexStr) {
if (!this.isValidHex(hexStr) || !this.isValidLength(hexStr)) {
return false;
}
const pubKeyBytes = this.hexToBytes(hexStr);
const firstByte = pubKeyBytes[0];
const validCompressed = pubKeyBytes.length === 33 && (firstByte === 2 || firstByte === 3);
const validUncompressed = pubKeyBytes.length === 65 && firstByte === 4;
return validCompressed || validUncompressed;
}
/**
* Encodes a value into CBOR format and returns it as a hex string.
*
* @param {unknown} value - The value to encode.
* @returns {string} - The CBOR encoded value as a hex string.
*/
cborEncode(value) {
if (value === undefined) {
throw new Error('Value to encode cannot be undefined.');
}
const cborData = encode(value);
return Buffer.from(cborData).toString('hex');
}
/**
* Checks if the length of the given hexadecimal string is valid.
* A valid length is either 66 characters (33 bytes) or 130 characters (65 bytes).
*
* @param {string} hexStr - The hexadecimal string to check.
* @returns {boolean} - Returns `true` if the length is valid, otherwise `false`.
*/
isValidLength(hexStr) {
return hexStr.length / 2 === 33 || hexStr.length / 2 === 65;
}
/**
* Checks if the provided string is a valid hexadecimal string.
*
* A valid hexadecimal string consists of pairs of hexadecimal digits (0-9, a-f, A-F).
*
* @param hexStr - The string to be validated as a hexadecimal string.
* @returns True if the string is a valid hexadecimal string, false otherwise.
*/
isValidHex(hexStr) {
return /^([0-9a-fA-F]{2})+$/.test(hexStr);
}
/**
* Converts a hexadecimal string to a Uint8Array.
*
* @param {string} hex - The hexadecimal string to convert.
* @returns {Uint8Array} The resulting byte array.
*/
hexToBytes(hex) {
const bytes = new Uint8Array(hex.length / 2);
for (let i = 0; i < hex.length; i += 2) {
bytes[i / 2] = parseInt(hex.substr(i, 2), 16);
}
return bytes;
}
/** @inheritdoc */
isValidPrivateKey(key) {
return this.isValidKey(key);
}
/**
* Validates whether the provided key is a valid ICP private key.
*
* This function attempts to create a new instance of `IcpKeyPair` using the provided key.
* If the key is valid, the function returns `true`. If the key is invalid, an error is thrown,
* and the function returns `false`.
*
* @param {string} key - The private key to validate.
* @returns {boolean} - `true` if the key is valid, `false` otherwise.
*/
isValidKey(key) {
try {
new keyPair_1.KeyPair({ prv: key });
return true;
}
catch {
return false;
}
}
/**
* Compresses an uncompressed public key.
*
* @param {string} uncompressedKey - The uncompressed public key in hexadecimal format.
* @returns {string} - The compressed public key in hexadecimal format.
* @throws {Error} - If the input key is not a valid uncompressed public key.
*/
compressPublicKey(uncompressedKey) {
if (uncompressedKey.startsWith('02') || uncompressedKey.startsWith('03')) {
return uncompressedKey;
}
if (!uncompressedKey.startsWith('04') || uncompressedKey.length !== 130) {
throw new Error('Invalid uncompressed public key format.');
}
const xHex = uncompressedKey.slice(2, 66);
const yHex = uncompressedKey.slice(66);
const y = BigInt(`0x${yHex}`);
const prefix = y % 2n === 0n ? '02' : '03';
return `${prefix}${xHex}`;
}
/**
* Converts a public key from its hexadecimal string representation to DER format.
*
* @param {string} publicKeyHex - The public key in hexadecimal string format.
* @returns The public key in DER format as a Uint8Array.
*/
getPublicKeyInDERFormat(publicKeyHex) {
const publicKeyBuffer = Buffer.from(publicKeyHex, 'hex');
const ellipticKey = secp256k1_1.secp256k1.ProjectivePoint.fromHex(publicKeyBuffer.toString('hex'));
const uncompressedPublicKeyHex = ellipticKey.toHex(false);
const derEncodedKey = agent.wrapDER(Buffer.from(uncompressedPublicKeyHex, 'hex'), agent.SECP256K1_OID);
return derEncodedKey;
}
/**
* Converts a public key in hexadecimal format to a Dfinity Principal ID.
*
* @param {string} publicKeyHex - The public key in hexadecimal format.
* @returns The corresponding Dfinity Principal ID.
*/
getPrincipalIdFromPublicKey(publicKeyHex) {
const derEncodedKey = this.getPublicKeyInDERFormat(publicKeyHex);
const principalId = principal_1.Principal.selfAuthenticating(Buffer.from(derEncodedKey));
return principalId;
}
/**
* Derives a DfinityPrincipal from a given public key in hexadecimal format.
*
* @param {string} publicKeyHex - The public key in hexadecimal format.
* @returns The derived DfinityPrincipal.
* @throws Will throw an error if the principal cannot be derived from the public key.
*/
derivePrincipalFromPublicKey(publicKeyHex) {
try {
const derEncodedKey = this.getPublicKeyInDERFormat(publicKeyHex);
const principalId = principal_1.Principal.selfAuthenticating(Buffer.from(derEncodedKey));
const principal = principal_1.Principal.fromUint8Array(principalId.toUint8Array());
return principal;
}
catch (error) {
throw new Error(`Failed to derive principal from public key: ${error.message}`);
}
}
/**
* Converts a DfinityPrincipal and an optional subAccount to a string representation of an account ID.
*
* @param {DfinityPrincipal} principal - The principal to convert.
* @param {Uint8Array} [subAccount=new Uint8Array(32)] - An optional sub-account, defaults to a 32-byte array of zeros.
* @returns {string} The hexadecimal string representation of the account ID.
*/
fromPrincipal(principal, subAccount = new Uint8Array(32)) {
const principalBytes = Buffer.from(principal.toUint8Array().buffer);
return this.getAccountIdFromPrincipalBytes(this.getAccountIdPrefix(), principalBytes, subAccount);
}
getAccountIdFromPrincipalBytes(ACCOUNT_ID_PREFIX, principalBytes, subAccount) {
const combinedBytes = Buffer.concat([ACCOUNT_ID_PREFIX, principalBytes, subAccount]);
const sha224Hash = crypto_1.default.createHash('sha224').update(combinedBytes).digest();
const checksum = Buffer.alloc(4);
checksum.writeUInt32BE(crc_32_1.default.buf(sha224Hash) >>> 0, 0);
const accountIdBytes = Buffer.concat([checksum, sha224Hash]);
return accountIdBytes.toString('hex');
}
/**
* Retrieves the address associated with a given hex-encoded public key.
*
* @param {string} hexEncodedPublicKey - The public key in hex-encoded format.
* @returns {Promise<string>} A promise that resolves to the address derived from the provided public key.
* @throws {Error} Throws an error if the provided public key is not in a valid hex-encoded format.
*/
async getAddressFromPublicKey(hexEncodedPublicKey) {
if (!this.isValidPublicKey(hexEncodedPublicKey)) {
throw new Error('Invalid hex-encoded public key format.');
}
const compressedKey = this.compressPublicKey(hexEncodedPublicKey);
const keyPair = new keyPair_1.KeyPair({ pub: compressedKey });
return keyPair.getAddress();
}
/**
* Generates a new key pair. If a seed is provided, it will be used to generate the key pair.
*
* @param {Buffer} [seed] - Optional seed for key generation.
* @returns {KeyPair} - The generated key pair containing both public and private keys.
* @throws {Error} - If the private key is missing in the generated key pair.
*/
generateKeyPair(seed) {
const keyPair = seed ? new keyPair_1.KeyPair({ seed }) : new keyPair_1.KeyPair();
const { pub, prv } = keyPair.getKeys();
if (!prv) {
throw new Error('Private key is missing in the generated key pair.');
}
return { pub, prv };
}
/**
* Validates the provided fee.
*
* @param {string} fee - The fee to validate.
* @throws {BuildTransactionError} - If the fee is zero or invalid.
*/
validateFee(fee) {
const feeValue = new bignumber_js_1.default(fee);
if (feeValue.isZero()) {
throw new sdk_core_1.BuildTransactionError('Fee cannot be zero');
}
return true;
}
/** @inheritdoc */
validateValue(value) {
if (value.isLessThanOrEqualTo(0)) {
throw new sdk_core_1.BuildTransactionError('amount cannot be less than or equal to zero');
}
return true;
}
/**
* Validates the provided memo.
*
* @param {number | BigInt} memo - The memo to validate.
* @returns {boolean} - Returns `true` if the memo is valid.
* @throws {BuildTransactionError} - If the memo is invalid.
*/
validateMemo(memo) {
const memoNumber = Number(memo);
if (memoNumber < 0 || Number.isNaN(memoNumber)) {
throw new sdk_core_1.BuildTransactionError('Invalid memo');
}
return true;
}
validateExpireTime(expireTime) {
if (Number(expireTime) < Date.now() * 1000000) {
throw new sdk_core_1.BuildTransactionError('Invalid expiry time');
}
return true;
}
/**
* Validates the raw transaction data to ensure it has a valid format in the blockchain context.
*
* @param {IcpTransactionData} transactionData - The transaction data to validate.
* @throws {ParseTransactionError} If the transaction data is invalid.
*/
validateRawTransaction(transactionData) {
if (!transactionData) {
throw new sdk_core_1.ParseTransactionError('Transaction data is missing.');
}
const { senderPublicKeyHex, senderAddress, receiverAddress } = transactionData;
if (senderPublicKeyHex && !this.isValidPublicKey(senderPublicKeyHex)) {
throw new sdk_core_1.ParseTransactionError('Sender public key is invalid.');
}
if (!this.isValidAddress(senderAddress)) {
throw new sdk_core_1.ParseTransactionError('Sender address is invalid.');
}
if (!this.isValidAddress(receiverAddress)) {
throw new sdk_core_1.ParseTransactionError('Receiver address is invalid.');
}
this.validateFee(transactionData.fee);
this.validateValue(new bignumber_js_1.default(transactionData.amount));
this.validateMemo(transactionData.memo);
this.validateExpireTime(transactionData.expiryTime);
}
/**
*
* @param {object} update
* @returns {Buffer}
*/
generateHttpCanisterUpdateId(update) {
return this.HttpCanisterUpdateRepresentationIndependentHash(update);
}
/**
* Generates a representation-independent hash for an HTTP canister update.
*
* @param {HttpCanisterUpdate} update - The HTTP canister update object.
* @returns {Buffer} - The hash of the update object.
*/
HttpCanisterUpdateRepresentationIndependentHash(update) {
const updateMap = {
request_type: iface_1.RequestType.CALL,
canister_id: update.canister_id,
method_name: update.method_name,
arg: update.arg,
ingress_expiry: update.ingress_expiry,
sender: update.sender,
};
return this.hashOfMap(updateMap);
}
/**
* Generates a SHA-256 hash for a given map object.
*
* @param {Record<string, unknown>} map - The map object to hash.
* @returns {Buffer} - The resulting hash as a Buffer.
*/
hashOfMap(map) {
const hashes = [];
for (const key in map) {
hashes.push(this.hashKeyVal(key, map[key]));
}
hashes.sort((buf0, buf1) => buf0.compare(buf1));
return this.sha256(hashes);
}
/**
* Generates a hash for a key-value pair.
*
* @param {string} key - The key to hash.
* @param {string | Buffer | BigInt} val - The value to hash.
* @returns {Buffer} - The resulting hash as a Buffer.
*/
hashKeyVal(key, val) {
const keyHash = this.hashString(key);
const valHash = this.hashVal(val);
return Buffer.concat([keyHash, valHash]);
}
/**
* Generates a SHA-256 hash for a given string.
*
* @param {string} value - The string to hash.
* @returns {Buffer} - The resulting hash as a Buffer.
*/
hashString(value) {
return this.sha256([Buffer.from(value)]);
}
/**
* Generates a hash for a 64-bit unsigned integer.
*
* @param {bigint} n - The 64-bit unsigned integer to hash.
* @returns {Buffer} - The resulting hash as a Buffer.
*/
hashU64(n) {
const buf = Buffer.allocUnsafe(10);
let i = 0;
while (true) {
const byte = Number(n & BigInt(0x7f));
n >>= BigInt(7);
if (n === BigInt(0)) {
buf[i] = byte;
break;
}
else {
buf[i] = byte | 0x80;
++i;
}
}
return this.hashBytes(buf.subarray(0, i + 1));
}
/**
* Generates a SHA-256 hash for an array of elements.
*
* @param {Array<any>} elements - The array of elements to hash.
* @returns {Buffer} - The resulting hash as a Buffer.
*/
hashArray(elements) {
return this.sha256(elements.map(this.hashVal));
}
/**
* Generates a hash for a given value.
*
* @param {string | Buffer | BigInt | number | Array<unknown>} val - The value to hash.
* @returns {Buffer} - The resulting hash as a Buffer.
* @throws {Error} - If the value type is unsupported.
*/
hashVal(val) {
if (typeof val === 'string') {
return utils.hashString(val);
}
else if (Buffer.isBuffer(val) || val instanceof Uint8Array) {
return utils.hashBytes(val);
}
else if (typeof val === 'bigint' || typeof val === 'number') {
return utils.hashU64(BigInt(val));
}
else if (Array.isArray(val)) {
return utils.hashArray(val);
}
else {
throw new Error(`Unsupported value type for hashing: ${typeof val}`);
}
}
/**
* Computes the SHA-256 hash of the given buffer.
*
* @param value - The buffer to hash.
* @returns The SHA-256 hash of the input buffer.
*/
hashBytes(value) {
return this.sha256([value]);
}
/**
* Computes the SHA-256 hash of the provided array of Buffer chunks.
*
* @param {Array<Buffer>} chunks - An array of Buffer objects to be hashed.
* @returns {Buffer} - The resulting SHA-256 hash as a Buffer.
*/
sha256(chunks) {
const hasher = js_sha256_1.default.sha256.create();
chunks.forEach((chunk) => hasher.update(chunk));
return Buffer.from(hasher.arrayBuffer());
}
/**
* Converts a hexadecimal string to a Buffer.
*
* @param hex - The hexadecimal string to convert.
* @returns A Buffer containing the binary data represented by the hexadecimal string.
*/
blobFromHex(hex) {
return Buffer.from(hex, 'hex');
}
/**
* Converts a binary blob (Buffer) to a hexadecimal string.
*
* @param {Buffer} blob - The binary data to be converted.
* @returns {string} The hexadecimal representation of the binary data.
*/
blobToHex(blob) {
return blob.toString('hex');
}
/**
* Decodes a given CBOR-encoded buffer.
*
* @param buffer - The CBOR-encoded buffer to decode.
* @returns The decoded data.
*/
cborDecode(buffer) {
const res = decode(buffer);
return res;
}
/**
* Generates a Buffer containing the domain IC request string.
*
* @returns {Buffer} A Buffer object initialized with the string '\x0Aic-request'.
*/
getDomainICRequest() {
return Buffer.from('\x0Aic-request');
}
/**
* Combines the domain IC request buffer with the provided message ID buffer to create signature data.
*
* @param {Buffer} messageId - The buffer containing the message ID.
* @returns {Buffer} - The concatenated buffer containing the domain IC request and the message ID.
*/
makeSignatureData(messageId) {
return Buffer.concat([this.getDomainICRequest(), messageId]);
}
/**
* Extracts the recipient information from the provided ICP transaction data.
*
* @param {IcpTransactionData} icpTransactionData - The ICP transaction data containing the receiver's address and amount.
* @returns {Recipient[]} An array containing a single recipient object with the receiver's address and amount.
*/
getRecipients(icpTransactionData) {
return {
address: icpTransactionData.receiverAddress,
amount: icpTransactionData.amount,
};
}
getTransactionSignature(signatureMap, update) {
return signatureMap.get(this.blobToHex(this.makeSignatureData(this.generateHttpCanisterUpdateId(update))));
}
getMetaData(memo, timestamp, ingressEnd) {
let currentTime = Date.now() * 1000000;
if (timestamp) {
currentTime = Number(timestamp);
}
let ingressStartTime, ingressEndTime;
if (ingressEnd) {
ingressEndTime = Number(ingressEnd);
ingressStartTime = ingressEndTime - iface_1.MAX_INGRESS_TTL; // 5 mins in nanoseconds
}
else {
ingressStartTime = currentTime;
ingressEndTime = ingressStartTime + iface_1.MAX_INGRESS_TTL; // 5 mins in nanoseconds
}
const metaData = {
created_at_time: currentTime,
ingress_start: ingressStartTime,
ingress_end: ingressEndTime,
memo: memo,
};
return { metaData, ingressEndTime };
}
convertSenderBlobToPrincipal(senderBlob) {
const MAX_LENGTH_IN_BYTES = 29;
if (senderBlob.length > MAX_LENGTH_IN_BYTES) {
throw new Error('Bytes too long for a valid Principal');
}
const principalBytes = new Uint8Array(MAX_LENGTH_IN_BYTES);
principalBytes.set(senderBlob.slice(0, senderBlob.length));
return principalBytes;
}
fromArgs(arg) {
const SendRequestMessage = messageCompiled.SendRequest;
const args = SendRequestMessage.decode(arg);
const transformedArgs = {
payment: { receiverGets: { e8s: Number(args.payment.receiverGets.e8s) } },
maxFee: { e8s: Number(args.maxFee.e8s) },
to: { hash: Buffer.from(args.to.hash) },
createdAtTime: { timestampNanos: (0, bignumber_js_1.default)(args.createdAtTime.timestampNanos.toString()).toNumber() },
memo: { memo: Number(args.memo.memo.toString()) },
};
return transformedArgs;
}
async toArg(args) {
const SendRequestMessage = messageCompiled.SendRequest;
const errMsg = SendRequestMessage.verify(args);
if (errMsg)
throw new Error(errMsg);
const message = SendRequestMessage.create(args);
return SendRequestMessage.encode(message).finish();
}
getAccountIdPrefix() {
return Buffer.from([0x0a, ...Buffer.from('account-id')]);
}
/** @inheritdoc */
isValidBlockId(hash) {
// ICP block hashes are 64-character hexadecimal strings
return this.isValidHash(hash);
}
/**
* Returns whether or not the string is a valid ICP hash
*
* @param {string} hash - string to validate
* @returns {boolean}
*/
isValidHash(hash) {
return typeof hash === 'string' && /^[0-9a-fA-F]{64}$/.test(hash);
}
/** @inheritdoc */
isValidTransactionId(txId) {
return this.isValidHash(txId);
}
getSignatures(payloadsData, senderPublicKey, senderPrivateKey) {
return payloadsData.payloads.map((payload) => ({
signing_payload: payload,
signature_type: payload.signature_type,
public_key: {
hex_bytes: senderPublicKey,
curve_type: iface_1.CurveType.SECP256K1,
},
hex_bytes: this.signPayload(senderPrivateKey, payload.hex_bytes),
}));
}
getTransactionId(unsignedTransaction, senderAddress, receiverAddress) {
try {
const decodedTxn = utils.cborDecode(utils.blobFromHex(unsignedTransaction));
const updates = decodedTxn.updates;
for (const [, update] of updates) {
const updateArgs = update.arg;
const sendArgs = utils.fromArgs(updateArgs);
const transactionHash = this.generateTransactionHash(sendArgs, senderAddress, receiverAddress);
return transactionHash;
}
throw new Error('No updates found in the unsigned transaction.');
}
catch (error) {
throw new Error(`Unable to compute transaction ID: ${error.message}`);
}
}
safeBigInt(value) {
if (typeof value === 'bigint') {
return value;
}
if (typeof value === 'number') {
const MAX_32BIT = 4294967295; // 2^32 - 1
const MIN_32BIT = -4294967296; // -(2^32)
const isOutside32BitRange = value > MAX_32BIT || value < MIN_32BIT;
return isOutside32BitRange ? BigInt(value) : value;
}
throw new Error(`Invalid type: expected a number or bigint, but received ${typeof value}`);
}
generateTransactionHash(sendArgs, senderAddress, receiverAddress) {
const senderAccount = this.accountIdentifier(senderAddress);
const receiverAccount = this.accountIdentifier(receiverAddress);
const transferFields = new Map([
[0, senderAccount],
[1, receiverAccount],
[2, new Map([[0, this.safeBigInt(sendArgs.payment.receiverGets.e8s)]])],
[3, new Map([[0, sendArgs.maxFee.e8s]])],
]);
const operationMap = new Map([[2, transferFields]]);
const txnFields = new Map([
[0, operationMap],
[1, this.safeBigInt(sendArgs.memo.memo)],
[2, new Map([[0, BigInt(sendArgs.createdAtTime.timestampNanos)]])],
]);
const processedTxn = this.getProcessedTransactionMap(txnFields);
const serializedTxn = encoder.encode(processedTxn);
return crypto_1.default.createHash('sha256').update(serializedTxn).digest('hex');
}
accountIdentifier(accountAddress) {
const bytes = Buffer.from(accountAddress, 'hex');
if (bytes.length === 32) {
return { hash: bytes.slice(4) };
}
throw new Error(`Invalid AccountIdentifier: 64 hex chars, got ${accountAddress.length}`);
}
getProcessedTransactionMap(txnMap) {
const operationMap = txnMap.get(0);
const transferMap = operationMap.get(2);
transferMap.set(0, this.serializeAccountIdentifier(transferMap.get(0)));
transferMap.set(1, this.serializeAccountIdentifier(transferMap.get(1)));
return txnMap;
}
serializeAccountIdentifier(accountHash) {
if (accountHash && accountHash.hash) {
const hashBuffer = accountHash.hash;
const checksum = Buffer.alloc(4);
checksum.writeUInt32BE(crc_32_1.default.buf(hashBuffer) >>> 0, 0);
return Buffer.concat([checksum, hashBuffer]).toString('hex').toLowerCase();
}
throw new Error('Invalid accountHash format');
}
}
exports.Utils = Utils;
const utils = new Utils();
exports.default = utils;
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{\n  BaseUtils,\n  KeyPair,\n  ParseTransactionError,\n  Recipient,\n  BuildTransactionError,\n  MethodNotImplementedError,\n} from '@bitgo/sdk-core';\nimport { Principal as DfinityPrincipal } from '@dfinity/principal';\nimport * as agent from '@dfinity/agent';\nimport crypto from 'crypto';\nimport crc32 from 'crc-32';\nimport {\n  HttpCanisterUpdate,\n  IcpTransactionData,\n  RequestType,\n  Signatures,\n  MetaData,\n  SendArgs,\n  PayloadsData,\n  CurveType,\n  AccountIdentifierHash,\n  CborUnsignedTransaction,\n  MAX_INGRESS_TTL,\n} from './iface';\nimport { KeyPair as IcpKeyPair } from './keyPair';\nconst messageCompiled = require('../../resources/messageCompiled');\nconst { encode, decode, Encoder } = require('cbor-x/index-no-eval'); // The \"cbor-x\" library is used here because it supports modern features like BigInt. do not replace it with \"cbor as \"cbor\" is not compatible with Rust's serde_cbor when handling big numbers.\nimport js_sha256 from 'js-sha256';\nimport BigNumber from 'bignumber.js';\nimport { secp256k1 } from '@noble/curves/secp256k1';\n\n//custom encoder that avoids tagging\nconst encoder = new Encoder({\n  structuredClone: false,\n  useToJSON: false,\n  mapsAsObjects: false,\n  largeBigIntToFloat: false,\n});\n\nexport class Utils implements BaseUtils {\n  /** @inheritdoc */\n  isValidSignature(signature: string): boolean {\n    throw new MethodNotImplementedError();\n  }\n\n  /**\n   * gets the fee data of this transaction.\n   */\n  feeData(): string {\n    return '-10000'; // fee is static for ICP transactions as per ICP documentation\n  }\n\n  /**\n   * Checks if the provided address is a valid ICP address.\n   *\n   * @param {string} address - The address to validate.\n   * @returns {boolean} - Returns `true` if the address is valid, otherwise `false`.\n   */\n  isValidAddress(address: string): boolean {\n    const rootAddress = this.validateMemoAndReturnRootAddress(address);\n    return rootAddress !== undefined && this.isValidHash(rootAddress);\n  }\n\n  /**\n   * Validates the memo ID in the address and returns the root address.\n   *\n   * @param {string} address - The address to validate and extract the root address from.\n   * @returns {string | undefined} - The root address if valid, otherwise `undefined`.\n   */\n  validateMemoAndReturnRootAddress(address: string): string | undefined {\n    if (!address) {\n      return undefined;\n    }\n    const [rootAddress, memoId] = address.split('?memoId=');\n    if (memoId && this.validateMemo(BigInt(memoId))) {\n      return rootAddress;\n    }\n    return address;\n  }\n\n  /**\n   * Checks if the provided hex string is a valid public key.\n   *\n   * A valid public key can be either compressed or uncompressed:\n   * - Compressed public keys are 33 bytes long and start with either 0x02 or 0x03.\n   * - Uncompressed public keys are 65 bytes long and start with 0x04.\n   *\n   * @param {string} hexStr - The hex string representation of the public key to validate.\n   * @returns {boolean} - Returns `true` if the hex string is a valid public key, otherwise `false`.\n   */\n  isValidPublicKey(hexStr: string): boolean {\n    if (!this.isValidHex(hexStr) || !this.isValidLength(hexStr)) {\n      return false;\n    }\n\n    const pubKeyBytes = this.hexToBytes(hexStr);\n    const firstByte = pubKeyBytes[0];\n    const validCompressed = pubKeyBytes.length === 33 && (firstByte === 2 || firstByte === 3);\n    const validUncompressed = pubKeyBytes.length === 65 && firstByte === 4;\n\n    return validCompressed || validUncompressed;\n  }\n\n  /**\n   * Encodes a value into CBOR format and returns it as a hex string.\n   *\n   * @param {unknown} value - The value to encode.\n   * @returns {string} - The CBOR encoded value as a hex string.\n   */\n  cborEncode(value: unknown): string {\n    if (value === undefined) {\n      throw new Error('Value to encode cannot be undefined.');\n    }\n    const cborData = encode(value);\n    return Buffer.from(cborData).toString('hex');\n  }\n\n  /**\n   * Checks if the length of the given hexadecimal string is valid.\n   * A valid length is either 66 characters (33 bytes) or 130 characters (65 bytes).\n   *\n   * @param {string} hexStr - The hexadecimal string to check.\n   * @returns {boolean} - Returns `true` if the length is valid, otherwise `false`.\n   */\n  isValidLength(hexStr: string): boolean {\n    return hexStr.length / 2 === 33 || hexStr.length / 2 === 65;\n  }\n\n  /**\n   * Checks if the provided string is a valid hexadecimal string.\n   *\n   * A valid hexadecimal string consists of pairs of hexadecimal digits (0-9, a-f, A-F).\n   *\n   * @param hexStr - The string to be validated as a hexadecimal string.\n   * @returns True if the string is a valid hexadecimal string, false otherwise.\n   */\n  isValidHex(hexStr: string): boolean {\n    return /^([0-9a-fA-F]{2})+$/.test(hexStr);\n  }\n\n  /**\n   * Converts a hexadecimal string to a Uint8Array.\n   *\n   * @param {string} hex - The hexadecimal string to convert.\n   * @returns {Uint8Array} The resulting byte array.\n   */\n  hexToBytes(hex: string): Uint8Array {\n    const bytes = new Uint8Array(hex.length / 2);\n    for (let i = 0; i < hex.length; i += 2) {\n      bytes[i / 2] = parseInt(hex.substr(i, 2), 16);\n    }\n    return bytes;\n  }\n\n  /** @inheritdoc */\n  isValidPrivateKey(key: string): boolean {\n    return this.isValidKey(key);\n  }\n\n  /**\n   * Validates whether the provided key is a valid ICP private key.\n   *\n   * This function attempts to create a new instance of `IcpKeyPair` using the provided key.\n   * If the key is valid, the function returns `true`. If the key is invalid, an error is thrown,\n   * and the function returns `false`.\n   *\n   * @param {string} key - The private key to validate.\n   * @returns {boolean} - `true` if the key is valid, `false` otherwise.\n   */\n  isValidKey(key: string): boolean {\n    try {\n      new IcpKeyPair({ prv: key });\n      return true;\n    } catch {\n      return false;\n    }\n  }\n\n  /**\n   * Compresses an uncompressed public key.\n   *\n   * @param {string} uncompressedKey - The uncompressed public key in hexadecimal format.\n   * @returns {string} - The compressed public key in hexadecimal format.\n   * @throws {Error} - If the input key is not a valid uncompressed public key.\n   */\n  compressPublicKey(uncompressedKey: string): string {\n    if (uncompressedKey.startsWith('02') || uncompressedKey.startsWith('03')) {\n      return uncompressedKey;\n    }\n    if (!uncompressedKey.startsWith('04') || uncompressedKey.length !== 130) {\n      throw new Error('Invalid uncompressed public key format.');\n    }\n\n    const xHex = uncompressedKey.slice(2, 66);\n    const yHex = uncompressedKey.slice(66);\n    const y = BigInt(`0x${yHex}`);\n    const prefix = y % 2n === 0n ? '02' : '03';\n\n    return `${prefix}${xHex}`;\n  }\n\n  /**\n   * Converts a public key from its hexadecimal string representation to DER format.\n   *\n   * @param {string} publicKeyHex - The public key in hexadecimal string format.\n   * @returns The public key in DER format as a Uint8Array.\n   */\n  getPublicKeyInDERFormat(publicKeyHex: string): Uint8Array {\n    const publicKeyBuffer = Buffer.from(publicKeyHex, 'hex');\n    const ellipticKey = secp256k1.ProjectivePoint.fromHex(publicKeyBuffer.toString('hex'));\n    const uncompressedPublicKeyHex = ellipticKey.toHex(false);\n    const derEncodedKey = agent.wrapDER(Buffer.from(uncompressedPublicKeyHex, 'hex'), agent.SECP256K1_OID);\n    return derEncodedKey;\n  }\n\n  /**\n   * Converts a public key in hexadecimal format to a Dfinity Principal ID.\n   *\n   * @param {string} publicKeyHex - The public key in hexadecimal format.\n   * @returns The corresponding Dfinity Principal ID.\n   */\n  getPrincipalIdFromPublicKey(publicKeyHex: string): DfinityPrincipal {\n    const derEncodedKey = this.getPublicKeyInDERFormat(publicKeyHex);\n    const principalId = DfinityPrincipal.selfAuthenticating(Buffer.from(derEncodedKey));\n    return principalId;\n  }\n\n  /**\n   * Derives a DfinityPrincipal from a given public key in hexadecimal format.\n   *\n   * @param {string} publicKeyHex - The public key in hexadecimal format.\n   * @returns The derived DfinityPrincipal.\n   * @throws Will throw an error if the principal cannot be derived from the public key.\n   */\n  derivePrincipalFromPublicKey(publicKeyHex: string): DfinityPrincipal {\n    try {\n      const derEncodedKey = this.getPublicKeyInDERFormat(publicKeyHex);\n      const principalId = DfinityPrincipal.selfAuthenticating(Buffer.from(derEncodedKey));\n      const principal = DfinityPrincipal.fromUint8Array(principalId.toUint8Array());\n      return principal;\n    } catch (error) {\n      throw new Error(`Failed to derive principal from public key: ${error.message}`);\n    }\n  }\n\n  /**\n   * Converts a DfinityPrincipal and an optional subAccount to a string representation of an account ID.\n   *\n   * @param {DfinityPrincipal} principal - The principal to convert.\n   * @param {Uint8Array} [subAccount=new Uint8Array(32)] - An optional sub-account, defaults to a 32-byte array of zeros.\n   * @returns {string} The hexadecimal string representation of the account ID.\n   */\n  fromPrincipal(principal: DfinityPrincipal, subAccount: Uint8Array = new Uint8Array(32)): string {\n    const principalBytes = Buffer.from(principal.toUint8Array().buffer);\n    return this.getAccountIdFromPrincipalBytes(this.getAccountIdPrefix(), principalBytes, subAccount);\n  }\n\n  getAccountIdFromPrincipalBytes(\n    ACCOUNT_ID_PREFIX: Buffer<ArrayBuffer>,\n    principalBytes: Buffer<ArrayBufferLike>,\n    subAccount: Uint8Array<ArrayBufferLike>\n  ): string {\n    const combinedBytes = Buffer.concat([ACCOUNT_ID_PREFIX, principalBytes, subAccount]);\n    const sha224Hash = crypto.createHash('sha224').update(combinedBytes).digest();\n    const checksum = Buffer.alloc(4);\n    checksum.writeUInt32BE(crc32.buf(sha224Hash) >>> 0, 0);\n    const accountIdBytes = Buffer.concat([checksum, sha224Hash]);\n    return accountIdBytes.toString('hex');\n  }\n\n  /**\n   * Retrieves the address associated with a given hex-encoded public key.\n   *\n   * @param {string} hexEncodedPublicKey - The public key in hex-encoded format.\n   * @returns {Promise<string>} A promise that resolves to the address derived from the provided public key.\n   * @throws {Error} Throws an error if the provided public key is not in a valid hex-encoded format.\n   */\n  async getAddressFromPublicKey(hexEncodedPublicKey: string): Promise<string> {\n    if (!this.isValidPublicKey(hexEncodedPublicKey)) {\n      throw new Error('Invalid hex-encoded public key format.');\n    }\n    const compressedKey = this.compressPublicKey(hexEncodedPublicKey);\n    const keyPair = new IcpKeyPair({ pub: compressedKey });\n    return keyPair.getAddress();\n  }\n\n  /**\n   * Generates a new key pair. If a seed is provided, it will be used to generate the key pair.\n   *\n   * @param {Buffer} [seed] - Optional seed for key generation.\n   * @returns {KeyPair} - The generated key pair containing both public and private keys.\n   * @throws {Error} - If the private key is missing in the generated key pair.\n   */\n  public generateKeyPair(seed?: Buffer): KeyPair {\n    const keyPair = seed ? new IcpKeyPair({ seed }) : new IcpKeyPair();\n    const { pub, prv } = keyPair.getKeys();\n    if (!prv) {\n      throw new Error('Private key is missing in the generated key pair.');\n    }\n    return { pub, prv };\n  }\n\n  /**\n   * Validates the provided fee.\n   *\n   * @param {string} fee - The fee to validate.\n   * @throws {BuildTransactionError} - If the fee is zero or invalid.\n   */\n  validateFee(fee: string): boolean {\n    const feeValue = new BigNumber(fee);\n    if (feeValue.isZero()) {\n      throw new BuildTransactionError('Fee cannot be zero');\n    }\n    return true;\n  }\n\n  /** @inheritdoc */\n  validateValue(value: BigNumber): boolean {\n    if (value.isLessThanOrEqualTo(0)) {\n      throw new BuildTransactionError('amount cannot be less than or equal to zero');\n    }\n    return true;\n  }\n\n  /**\n   * Validates the provided memo.\n   *\n   * @param {number | BigInt} memo - The memo to validate.\n   * @returns {boolean} - Returns `true` if the memo is valid.\n   * @throws {BuildTransactionError} - If the memo is invalid.\n   */\n  validateMemo(memo: number | BigInt): boolean {\n    const memoNumber = Number(memo);\n    if (memoNumber < 0 || Number.isNaN(memoNumber)) {\n      throw new BuildTransactionError('Invalid memo');\n    }\n    return true;\n  }\n\n  validateExpireTime(expireTime: number | BigInt): boolean {\n    if (Number(expireTime) < Date.now() * 1000_000) {\n      throw new BuildTransactionError('Invalid expiry time');\n    }\n    return true;\n  }\n\n  /**\n   * Validates the raw transaction data to ensure it has a valid format in the blockchain context.\n   *\n   * @param {IcpTransactionData} transactionData - The transaction data to validate.\n   * @throws {ParseTransactionError} If the transaction data is invalid.\n   */\n  validateRawTransaction(transactionData: IcpTransactionData): void {\n    if (!transactionData) {\n      throw new ParseTransactionError('Transaction data is missing.');\n    }\n    const { senderPublicKeyHex, senderAddress, receiverAddress } = transactionData;\n    if (senderPublicKeyHex && !this.isValidPublicKey(senderPublicKeyHex)) {\n      throw new ParseTransactionError('Sender public key is invalid.');\n    }\n    if (!this.isValidAddress(senderAddress)) {\n      throw new ParseTransactionError('Sender address is invalid.');\n    }\n    if (!this.isValidAddress(receiverAddress)) {\n      throw new ParseTransactionError('Receiver address is invalid.');\n    }\n    this.validateFee(transactionData.fee);\n    this.validateValue(new BigNumber(transactionData.amount));\n    this.validateMemo(transactionData.memo);\n    this.validateExpireTime(transactionData.expiryTime);\n  }\n\n  /**\n   *\n   * @param {object} update\n   * @returns {Buffer}\n   */\n  generateHttpCanisterUpdateId(update: HttpCanisterUpdate): Buffer {\n    return this.HttpCanisterUpdateRepresentationIndependentHash(update);\n  }\n\n  /**\n   * Generates a representation-independent hash for an HTTP canister update.\n   *\n   * @param {HttpCanisterUpdate} update - The HTTP canister update object.\n   * @returns {Buffer} - The hash of the update object.\n   */\n  HttpCanisterUpdateRepresentationIndependentHash(update: HttpCanisterUpdate): Buffer {\n    const updateMap = {\n      request_type: RequestType.CALL,\n      canister_id: update.canister_id,\n      method_name: update.method_name,\n      arg: update.arg,\n      ingress_expiry: update.ingress_expiry,\n      sender: update.sender,\n    };\n    return this.hashOfMap(updateMap);\n  }\n\n  /**\n   * Generates a SHA-256 hash for a given map object.\n   *\n   * @param {Record<string, unknown>} map - The map object to hash.\n   * @returns {Buffer} - The resulting hash as a Buffer.\n   */\n  hashOfMap(map: Record<string, any>): Buffer {\n    const hashes: Buffer[] = [];\n    for (const key in map) {\n      hashes.push(this.hashKeyVal(key, map[key]));\n    }\n    hashes.sort((buf0, buf1) => buf0.compare(buf1));\n    return this.sha256(hashes);\n  }\n\n  /**\n   * Generates a hash for a key-value pair.\n   *\n   * @param {string} key - The key to hash.\n   * @param {string | Buffer | BigInt} val - The value to hash.\n   * @returns {Buffer} - The resulting hash as a Buffer.\n   */\n  hashKeyVal(key: string, val: any): Buffer {\n    const keyHash = this.hashString(key);\n    const valHash = this.hashVal(val);\n    return Buffer.concat([keyHash, valHash]);\n  }\n\n  /**\n   * Generates a SHA-256 hash for a given string.\n   *\n   * @param {string} value - The string to hash.\n   * @returns {Buffer} - The resulting hash as a Buffer.\n   */\n  hashString(value: string): Buffer {\n    return this.sha256([Buffer.from(value)]);\n  }\n\n  /**\n   * Generates a hash for a 64-bit unsigned integer.\n   *\n   * @param {bigint} n - The 64-bit unsigned integer to hash.\n   * @returns {Buffer} - The resulting hash as a Buffer.\n   */\n  hashU64(n: bigint): Buffer {\n    const buf = Buffer.allocUnsafe(10);\n    let i = 0;\n    while (true) {\n      const byte = Number(n & BigInt(0x7f));\n      n >>= BigInt(7);\n      if (n === BigInt(0)) {\n        buf[i] = byte;\n        break;\n      } else {\n        buf[i] = byte | 0x80;\n        ++i;\n      }\n    }\n    return this.hashBytes(buf.subarray(0, i + 1));\n  }\n\n  /**\n   * Generates a SHA-256 hash for an array of elements.\n   *\n   * @param {Array<any>} elements - The array of elements to hash.\n   * @returns {Buffer} - The resulting hash as a Buffer.\n   */\n  hashArray(elements: Array<any>): Buffer {\n    return this.sha256(elements.map(this.hashVal));\n  }\n\n  /**\n   * Generates a hash for a given value.\n   *\n   * @param {string | Buffer | BigInt | number | Array<unknown>} val - The value to hash.\n   * @returns {Buffer} - The resulting hash as a Buffer.\n   * @throws {Error} - If the value type is unsupported.\n   */\n  hashVal(val: string | Buffer | BigInt | number | Array<unknown>): Buffer {\n    if (typeof val === 'string') {\n      return utils.hashString(val);\n    } else if (Buffer.isBuffer(val) || val instanceof Uint8Array) {\n      return utils.hashBytes(val);\n    } else if (typeof val === 'bigint' || typeof val === 'number') {\n      return utils.hashU64(BigInt(val));\n    } else if (Array.isArray(val)) {\n      return utils.hashArray(val);\n    } else {\n      throw new Error(`Unsupported value type for hashing: ${typeof val}`);\n    }\n  }\n\n  /**\n   * Computes the SHA-256 hash of the given buffer.\n   *\n   * @param value - The buffer to hash.\n   * @returns The SHA-256 hash of the input buffer.\n   */\n  hashBytes(value: Buffer | Uint8Array): Buffer {\n    return this.sha256([value]);\n  }\n\n  /**\n   * Computes the SHA-256 hash of the provided array of Buffer chunks.\n   *\n   * @param {Array<Buffer>} chunks - An array of Buffer objects to be hashed.\n   * @returns {Buffer} - The resulting SHA-256 hash as a Buffer.\n   */\n  sha256(chunks: Array<Buffer> | Array<Uint8Array>): Buffer {\n    const hasher = js_sha256.sha256.create();\n    chunks.forEach((chunk) => hasher.update(chunk));\n    return Buffer.from(hasher.arrayBuffer());\n  }\n\n  /**\n   * Converts a hexadecimal string to a Buffer.\n   *\n   * @param hex - The hexadecimal string to convert.\n   * @returns A Buffer containing the binary data represented by the hexadecimal string.\n   */\n  blobFromHex(hex: string): Buffer {\n    return Buffer.from(hex, 'hex');\n  }\n\n  /**\n   * Converts a binary blob (Buffer) to a hexadecimal string.\n   *\n   * @param {Buffer} blob - The binary data to be converted.\n   * @returns {string} The hexadecimal representation of the binary data.\n   */\n  blobToHex(blob: Buffer): string {\n    return blob.toString('hex');\n  }\n\n  /**\n   * Decodes a given CBOR-encoded buffer.\n   *\n   * @param buffer - The CBOR-encoded buffer to decode.\n   * @returns The decoded data.\n   */\n  cborDecode(buffer: Buffer): unknown {\n    const res = decode(buffer);\n    return res;\n  }\n\n  /**\n   * Generates a Buffer containing the domain IC request string.\n   *\n   * @returns {Buffer} A Buffer object initialized with the string '\\x0Aic-request'.\n   */\n  getDomainICRequest(): Buffer {\n    return Buffer.from('\\x0Aic-request');\n  }\n\n  /**\n   * Combines the domain IC request buffer with the provided message ID buffer to create signature data.\n   *\n   * @param {Buffer} messageId - The buffer containing the message ID.\n   * @returns {Buffer} - The concatenated buffer containing the domain IC request and the message ID.\n   */\n  makeSignatureData(messageId: Buffer): Buffer {\n    return Buffer.concat([this.getDomainICRequest(), messageId]);\n  }\n\n  /**\n   * Extracts the recipient information from the provided ICP transaction data.\n   *\n   * @param {IcpTransactionData} icpTransactionData - The ICP transaction data containing the receiver's address and amount.\n   * @returns {Recipient[]} An array containing a single recipient object with the receiver's address and amount.\n   */\n  getRecipients(icpTransactionData: IcpTransactionData): Recipient {\n    return {\n      address: icpTransactionData.receiverAddress,\n      amount: icpTransactionData.amount,\n    };\n  }\n\n  getTransactionSignature(signatureMap: Map<string, Signatures>, update: HttpCanisterUpdate): Signatures | undefined {\n    return signatureMap.get(this.blobToHex(this.makeSignatureData(this.generateHttpCanisterUpdateId(update))));\n  }\n\n  getMetaData(\n    memo: number | BigInt,\n    timestamp: number | bigint | undefined,\n    ingressEnd: number | BigInt | undefined\n  ): { metaData: MetaData; ingressEndTime: number | BigInt } {\n    let currentTime = Date.now() * 1000000;\n    if (timestamp) {\n      currentTime = Number(timestamp);\n    }\n    let ingressStartTime: number, ingressEndTime: number;\n    if (ingressEnd) {\n      ingressEndTime = Number(ingressEnd);\n      ingressStartTime = ingressEndTime - MAX_INGRESS_TTL; // 5 mins in nanoseconds\n    } else {\n      ingressStartTime = currentTime;\n      ingressEndTime = ingressStartTime + MAX_INGRESS_TTL; // 5 mins in nanoseconds\n    }\n    const metaData: MetaData = {\n      created_at_time: currentTime,\n      ingress_start: ingressStartTime,\n      ingress_end: ingressEndTime,\n      memo: memo,\n    };\n\n    return { metaData, ingressEndTime };\n  }\n\n  convertSenderBlobToPrincipal(senderBlob: Uint8Array): Uint8Array {\n    const MAX_LENGTH_IN_BYTES = 29;\n    if (senderBlob.length > MAX_LENGTH_IN_BYTES) {\n      throw new Error('Bytes too long for a valid Principal');\n    }\n    const principalBytes = new Uint8Array(MAX_LENGTH_IN_BYTES);\n    principalBytes.set(senderBlob.slice(0, senderBlob.length));\n    return principalBytes;\n  }\n\n  fromArgs(arg: Uint8Array): SendArgs {\n    const SendRequestMessage = messageCompiled.SendRequest;\n    const args = SendRequestMessage.decode(arg) as unknown as SendArgs;\n    const transformedArgs: SendArgs = {\n      payment: { receiverGets: { e8s: Number(args.payment.receiverGets.e8s) } },\n      maxFee: { e8s: Number(args.maxFee.e8s) },\n      to: { hash: Buffer.from(args.to.hash) },\n      createdAtTime: { timestampNanos: BigNumber(args.createdAtTime.timestampNanos.toString()).toNumber() },\n      memo: { memo: Number(args.memo.memo.toString()) },\n    };\n    return transformedArgs;\n  }\n\n  async toArg(args: SendArgs): Promise<Uint8Array> {\n    const SendRequestMessage = messageCompiled.SendRequest;\n    const errMsg = SendRequestMessage.verify(args);\n    if (errMsg) throw new Error(errMsg);\n    const message = SendRequestMessage.create(args as any);\n    return SendRequestMessage.encode(message).finish();\n  }\n\n  getAccountIdPrefix(): Buffer<ArrayBuffer> {\n    return Buffer.from([0x0a, ...Buffer.from('account-id')]);\n  }\n\n  /** @inheritdoc */\n  isValidBlockId(hash: string): boolean {\n    // ICP block hashes are 64-character hexadecimal strings\n    return this.isValidHash(hash);\n  }\n\n  /**\n   * Returns whether or not the string is a valid ICP hash\n   *\n   * @param {string} hash - string to validate\n   * @returns {boolean}\n   */\n  isValidHash(hash: string): boolean {\n    return typeof hash === 'string' && /^[0-9a-fA-F]{64}$/.test(hash);\n  }\n\n  /** @inheritdoc */\n  isValidTransactionId(txId: string): boolean {\n    return this.isValidHash(txId);\n  }\n\n  getSignatures(payloadsData: PayloadsData, senderPublicKey: string, senderPrivateKey: string): Signatures[] {\n    return payloadsData.payloads.map((payload) => ({\n      signing_payload: payload,\n      signature_type: payload.signature_type,\n      public_key: {\n        hex_bytes: senderPublicKey,\n        curve_type: CurveType.SECP256K1,\n      },\n      hex_bytes: this.signPayload(senderPrivateKey, payload.hex_bytes),\n    }));\n  }\n\n  signPayload = (privateKey: string, payloadHex: string): string => {\n    const privateKeyBytes = Buffer.from(privateKey, 'hex');\n    const payloadHash = crypto.createHash('sha256').update(Buffer.from(payloadHex, 'hex')).digest('hex');\n    const signature = secp256k1.sign(payloadHash, privateKeyBytes);\n    const r = Buffer.from(signature.r.toString(16).padStart(64, '0'), 'hex');\n    const s = Buffer.from(signature.s.toString(16).padStart(64, '0'), 'hex');\n    return Buffer.concat([r, s]).toString('hex');\n  };\n\n  getTransactionId(unsignedTransaction: string, senderAddress: string, receiverAddress: string): string {\n    try {\n      const decodedTxn = utils.cborDecode(utils.blobFromHex(unsignedTransaction)) as CborUnsignedTransaction;\n      const updates = decodedTxn.updates as unknown as [string, HttpCanisterUpdate][];\n      for (const [, update] of updates) {\n        const updateArgs = update.arg;\n        const sendArgs = utils.fromArgs(updateArgs);\n        const transactionHash = this.generateTransactionHash(sendArgs, senderAddress, receiverAddress);\n        return transactionHash;\n      }\n      throw new Error('No updates found in the unsigned transaction.');\n    } catch (error) {\n      throw new Error(`Unable to compute transaction ID: ${error.message}`);\n    }\n  }\n\n  safeBigInt(value: unknown): number | bigint {\n    if (typeof value === 'bigint') {\n      return value;\n    }\n\n    if (typeof value === 'number') {\n      const MAX_32BIT = 4294967295; // 2^32 - 1\n      const MIN_32BIT = -4294967296; // -(2^32)\n      const isOutside32BitRange = value > MAX_32BIT || value < MIN_32BIT;\n      return isOutside32BitRange ? BigInt(value) : value;\n    }\n\n    throw new Error(`Invalid type: expected a number or bigint, but received ${typeof value}`);\n  }\n\n  generateTransactionHash(sendArgs: SendArgs, senderAddress: string, receiverAddress: string): string {\n    const senderAccount = this.accountIdentifier(senderAddress);\n    const receiverAccount = this.accountIdentifier(receiverAddress);\n\n    const transferFields = new Map<any, any>([\n      [0, senderAccount],\n      [1, receiverAccount],\n      [2, new Map([[0, this.safeBigInt(sendArgs.payment.receiverGets.e8s)]])],\n      [3, new Map([[0, sendArgs.maxFee.e8s]])],\n    ]);\n\n    const operationMap = new Map([[2, transferFields]]);\n    const txnFields = new Map<any, any>([\n      [0, operationMap],\n      [1, this.safeBigInt(sendArgs.memo.memo)],\n      [2, new Map([[0, BigInt(sendArgs.createdAtTime.timestampNanos)]])],\n    ]);\n\n    const processedTxn = this.getProcessedTransactionMap(txnFields);\n    const serializedTxn = encoder.encode(processedTxn);\n    return crypto.createHash('sha256').update(serializedTxn).digest('hex');\n  }\n\n  accountIdentifier(accountAddress: string): AccountIdentifierHash {\n    const bytes = Buffer.from(accountAddress, 'hex');\n    if (bytes.length === 32) {\n      return { hash: bytes.slice(4) };\n    }\n    throw new Error(`Invalid AccountIdentifier: 64 hex chars, got ${accountAddress.length}`);\n  }\n\n  getProcessedTransactionMap(txnMap: Map<any, any>): Map<any, any> {\n    const operationMap = txnMap.get(0);\n    const transferMap = operationMap.get(2);\n    transferMap.set(0, this.serializeAccountIdentifier(transferMap.get(0)));\n    transferMap.set(1, this.serializeAccountIdentifier(transferMap.get(1)));\n    return txnMap;\n  }\n\n  serializeAccountIdentifier(accountHash: AccountIdentifierHash): string {\n    if (accountHash && accountHash.hash) {\n      const hashBuffer = accountHash.hash;\n      const checksum = Buffer.alloc(4);\n      checksum.writeUInt32BE(crc32.buf(hashBuffer) >>> 0, 0);\n      return Buffer.concat([checksum, hashBuffer]).toString('hex').toLowerCase();\n    }\n    throw new Error('Invalid accountHash format');\n  }\n}\n\nconst utils = new Utils();\nexport default utils;\n"]}Выполнить команду
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