{
  "version": 3,
  "sources": ["../src/helpers/hex-to-bytes.ts", "../src/constants.ts", "../src/helpers/encoding.ts", "../src/helpers/byte-conversions.ts", "../src/helpers/util.ts", "../src/helpers/validators.ts"],
  "sourcesContent": ["/**\n * Hex string \u2192 byte values `0..255`. Odd length implies a leading `0` nibble (unlike {@link hexToBuffer}).\n *\n * @param hex Contiguous hex digits (no `0x` stripping).\n * @returns `number[]` of byte values.\n */\nexport function hexToBytes(hex: string): number[] {\n  const clean = hex.length % 2 ? `0${hex}` : hex;\n  const out: number[] = [];\n  for (let i = 0; i < clean.length; i += 2) {\n    out.push(Number.parseInt(clean.slice(i, i + 2), 16));\n  }\n  return out;\n}\n", "import { hexToBytes } from \"./helpers/hex-to-bytes\";\n\nexport const HEX_ENC = \"hex\";\nexport const UTF8_ENC = \"utf8\";\nexport const BINARY_ENC = \"binary\";\n\nexport const ENCRYPT_OP = \"encrypt\";\nexport const DECRYPT_OP = \"decrypt\";\n\nexport const SIGN_OP = \"sign\";\nexport const VERIFY_OP = \"verify\";\n\nexport const LENGTH_0 = 0;\nexport const LENGTH_1 = 1;\nexport const LENGTH_12 = 12;\nexport const LENGTH_16 = 16;\nexport const LENGTH_32 = 32;\nexport const LENGTH_64 = 64;\nexport const LENGTH_128 = 128;\nexport const LENGTH_256 = 256;\nexport const LENGTH_512 = 512;\nexport const LENGTH_1024 = 1024;\n\nexport const AES_LENGTH = LENGTH_256;\nexport const HMAC_LENGTH = LENGTH_256;\n\nexport const AES_BROWSER_ALGO = \"AES-CBC\";\nexport const HMAC_BROWSER_ALGO = `SHA-${AES_LENGTH}`;\nexport const HMAC_BROWSER = \"HMAC\";\n\nexport const SHA256_BROWSER_ALGO = \"SHA-256\";\nexport const SHA512_BROWSER_ALGO = \"SHA-512\";\n\nexport const AES_NODE_ALGO = `aes-${AES_LENGTH}-cbc`;\nexport const HMAC_NODE_ALGO = `sha${HMAC_LENGTH}`;\n\nexport const SHA256_NODE_ALGO = \"sha256\";\nexport const SHA512_NODE_ALGO = \"sha512\";\nexport const RIPEMD160_NODE_ALGO = \"ripemd160\";\n\nexport const PBKDF2_DIGEST_SHA256 = SHA256_NODE_ALGO;\nexport const PBKDF2_DIGEST_SHA512 = SHA512_NODE_ALGO;\n\nexport const PREFIX_LENGTH = LENGTH_1;\nexport const KEY_LENGTH = LENGTH_32;\nexport const IV_LENGTH = LENGTH_16;\nexport const AES_GCM_NONCE_LENGTH = LENGTH_12;\nexport const AES_GCM_ENVELOPE_NONCE_MAX_LENGTH = LENGTH_128;\nexport const AES_GCM_TAG_LENGTH = LENGTH_16;\nexport const MAC_LENGTH = LENGTH_32;\nexport const DECOMPRESSED_LENGTH = LENGTH_64;\n\nexport const PREFIXED_KEY_LENGTH = KEY_LENGTH + PREFIX_LENGTH;\nexport const PREFIXED_DECOMPRESSED_LENGTH = DECOMPRESSED_LENGTH + PREFIX_LENGTH;\n\nexport const ECIES_SERIALIZED_MIN_LENGTH =\n  IV_LENGTH + PREFIXED_KEY_LENGTH + MAC_LENGTH;\n\nexport const MAX_KEY_LENGTH = LENGTH_1024;\nexport const PBKDF2_DEFAULT_ITERATIONS = 210_000;\nexport const MAX_MSG_LENGTH = LENGTH_32;\n\nexport const EMPTY_BUFFER = new Uint8Array(LENGTH_0);\n\nexport const EC_GROUP_ORDER = new Uint8Array(\n  hexToBytes(\n    \"fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141\"\n  )\n);\n\nexport const ZERO32 = new Uint8Array(LENGTH_32).fill(LENGTH_0);\n\nexport const ERROR_BAD_MAC = \"Bad MAC\";\nexport const ERROR_BAD_SIGNATURE = \"Bad signature\";\nexport const ERROR_BAD_PRIVATE_KEY = \"Bad private key\";\nexport const ERROR_BAD_PUBLIC_KEY = \"Bad public key\";\nexport const ERROR_ECIES_SERIALIZED_LENGTH =\n  \"ECIES deserialize: buffer shorter than minimum serialized length\";\n\nexport const ERROR_EMPTY_MESSAGE = \"Message should not be empty\";\nexport const ERROR_MESSAGE_TOO_LONG = \"Message is too long\";\n\nexport const ERROR_BAD_EPHEM_PRIVATE_KEY = \"Invalid ephemeral private key\";\n\nexport const ERROR_AES_IV_LENGTH = \"AES-CBC: IV must be 16 bytes\";\nexport const ERROR_AES_KEY_LENGTH = \"AES-CBC: key must be 32 bytes\";\n\nexport const ERROR_AES_GCM_KEY_LENGTH =\n  \"AES-GCM: key must be 16, 24, or 32 bytes\";\nexport const ERROR_AES_GCM_NONCE_LENGTH =\n  \"AES-GCM: nonce must be at least 8 bytes\";\nexport const ERROR_AES_GCM_CIPHERTEXT_LENGTH =\n  \"AES-GCM: ciphertext must be longer than the authentication tag\";\n", "import {\n  HEX_ENC,\n  LENGTH_0,\n  LENGTH_16,\n  type UTF8_ENC,\n} from \"../constants\";\n\nconst textEncoder = new TextEncoder();\nconst textDecoder = new TextDecoder();\n\n/**\n * Encodes a UTF-8 string into bytes.\n * @param str Input string.\n * @returns UTF-8 encoded bytes.\n */\nexport function utf8ToBuffer(str: string): Uint8Array {\n  return textEncoder.encode(str);\n}\n\n/**\n * Decodes UTF-8 bytes into a string.\n * @param buf UTF-8 encoded bytes.\n * @returns Decoded string.\n */\nexport function bufferToUtf8(buf: Uint8Array): string {\n  return textDecoder.decode(buf);\n}\n\n/**\n * Concatenates multiple byte arrays.\n * @param buffers Byte arrays to concatenate.\n * @returns Concatenated byte array.\n */\nexport function concatBuffers(...buffers: Uint8Array[]): Uint8Array {\n  const total = buffers.reduce((n, b) => n + b.length, LENGTH_0);\n  const out = new Uint8Array(total);\n  let offset = LENGTH_0;\n  for (const b of buffers) {\n    out.set(b, offset);\n    offset += b.length;\n  }\n  return out;\n}\n\n/**\n * Converts bytes to a lowercase hex string.\n * @param buf Input bytes.\n * @param enc Output encoding selector. Only `hex` is accepted.\n * @returns Hex string.\n */\nexport function bufferToHex(\n  buf: Uint8Array,\n  enc: typeof HEX_ENC | typeof UTF8_ENC = HEX_ENC\n): string {\n  if (enc !== HEX_ENC) {\n    throw new Error(\"bufferToHex: only hex encoding is supported\");\n  }\n  let hex = \"\";\n  for (const byte of buf) {\n    hex += byte.toString(16).padStart(2, \"0\");\n  }\n  return hex;\n}\n\n/**\n * Converts a hex string to bytes.\n * @param hex Input hex string, with optional `0x` prefix.\n * @returns Decoded bytes.\n */\nexport function hexToBuffer(hex: string): Uint8Array {\n  const clean = hex.startsWith(\"0x\") ? hex.slice(2) : hex;\n  if (clean.length % 2 !== 0) {\n    throw new Error(\"hexToBuffer: invalid length\");\n  }\n  const out = new Uint8Array(clean.length / 2);\n  for (let i = 0; i < out.length; i++) {\n    const byte = Number.parseInt(clean.slice(i * 2, i * 2 + 2), 16);\n    if (!Number.isFinite(byte) || byte < 0 || byte > 255) {\n      throw new Error(\"hexToBuffer: invalid hex character\");\n    }\n    out[i] = byte;\n  }\n  return out;\n}\n\n/**\n * Removes a leading `0x` prefix from a hex string.\n * @param hex Input hex string.\n * @returns Hex string without prefix.\n */\nexport function sanitizeHex(hex: string): string {\n  return hex.startsWith(\"0x\") ? hex.slice(2) : hex;\n}\n\n/**\n * Removes leading zeros from a hex string.\n * @param hex Input hex string.\n * @returns Hex string without leading zeros.\n */\nexport function removeHexLeadingZeros(hex: string): string {\n  const h = sanitizeHex(hex);\n  const stripped = h.replace(/^0+/, \"\");\n  return stripped.length ? stripped : \"0\";\n}\n\n/**\n * Parses a hex string into a number.\n * @param hex Input hex string.\n * @returns Parsed number.\n */\nexport function hexToNumber(hex: string): number {\n  return Number.parseInt(sanitizeHex(hex), 16);\n}\n\n/**\n * RFC 4648 Base64 from bytes. Chunks `btoa` input to avoid huge spread argument lists.\n *\n * @param buf Input bytes.\n * @returns Base64 string (no line breaks).\n */\nexport function bufferToBase64(buf: Uint8Array): string {\n  const chunk = 0x8000;\n  let binary = \"\";\n  for (let i = 0; i < buf.length; i += chunk) {\n    binary += String.fromCharCode(...buf.subarray(i, i + chunk));\n  }\n  return btoa(binary);\n}\n\n/**\n * RFC 4648 Base64 to bytes (whitespace stripped). Uses `atob`.\n *\n * @param str Base64 string.\n * @returns New `Uint8Array`.\n * @throws {DOMException} Invalid Base64 where `atob` throws.\n */\nexport function base64ToBuffer(str: string): Uint8Array {\n  const normalized = str.replace(/\\s+/g, \"\");\n  const binary = atob(normalized);\n  const out = new Uint8Array(binary.length);\n  for (let i = 0; i < binary.length; i++) {\n    out[i] = binary.charCodeAt(i) & 0xff;\n  }\n  return out;\n}\n\n/**\n * RFC 4648 Base64url without `=` padding (`-`/`_`). Common for JWK `k`.\n *\n * @param buf Input bytes.\n * @returns Base64url string.\n */\nexport function bufferToBase64Url(buf: Uint8Array): string {\n  return bufferToBase64(buf)\n    .replace(/\\+/g, \"-\")\n    .replace(/\\//g, \"_\")\n    .replace(/=+$/, \"\");\n}\n\n/**\n * Base64url to bytes (optional padding; then {@link base64ToBuffer}).\n *\n * @param str Base64url string.\n * @returns New `Uint8Array`.\n * @throws {Error} Length mod 4 === 1 (invalid).\n */\nexport function base64UrlToBuffer(str: string): Uint8Array {\n  let s = str.replace(/-/g, \"+\").replace(/_/g, \"/\");\n  const pad = s.length % 4;\n  if (pad === 2) s += \"==\";\n  else if (pad === 3) s += \"=\";\n  else if (pad === 1) {\n    throw new Error(\"base64UrlToBuffer: invalid length\");\n  }\n  return base64ToBuffer(s);\n}\n\n/**\n * 16-byte AES-128 raw key from `utf8ToBuffer(key.padEnd(16, \" \"))`. Must yield exactly 16 UTF-8 bytes\n * (same constraint as Web Crypto `importKey(\"raw\", \u2026)` for AES-128).\n *\n * @param key Passphrase.\n * @returns 16 key bytes.\n * @throws {Error} UTF-8 length \u2260 16 after padding.\n */\nexport function aes128StringKeyMaterial(key: string): Uint8Array {\n  const padded = key.padEnd(LENGTH_16, \" \");\n  const bytes = textEncoder.encode(padded);\n  if (bytes.length !== LENGTH_16) {\n    throw new Error(\n      \"aes128StringKeyMaterial: padded key must UTF-8 encode to exactly 16 bytes\",\n    );\n  }\n  return bytes;\n}\n\n", "import { BINARY_ENC, HEX_ENC, UTF8_ENC } from \"../constants\";\nimport {\n  bufferToHex as bufferToHexRaw,\n  bufferToUtf8,\n  hexToBuffer,\n  utf8ToBuffer,\n} from \"./encoding\";\n\nconst TYPE_BUFFER = \"buffer\";\nconst TYPE_ARRAY = \"array\";\nconst TYPE_TYPED_ARRAY = \"typed-array\";\nconst TYPE_ARRAY_BUFFER = \"array-buffer\";\n\n/**\n * Rounds a length in **characters** (e.g. binary digits) up to the next multiple of `byteSize` (default 8).\n * Used to build fixed-width `0`/`1` or hex string layouts in the same way as **enc-utils**.\n *\n * @param length - Current length.\n * @param byteSize - Group size in characters; default `8` (one byte of binary digits).\n * @returns The smallest multiple of `byteSize` that is `>=` `length`, or `length` if already aligned.\n */\nexport function calcByteLength(length: number, byteSize = 8): number {\n  const remainder = length % byteSize;\n  return remainder\n    ? ((length - remainder) / byteSize) * byteSize + byteSize\n    : length;\n}\n\n/**\n * Pads a string to a minimum length on the **left** or **right** using a repeated `padding` string.\n * Base implementation for {@link padLeft} and {@link padRight}. If `str` is already longer than `length`,\n * it is returned unchanged (no truncation).\n *\n * @param str - Source string.\n * @param length - Target character length.\n * @param left - `true` to pad on the left, `false` on the right.\n * @param padding - Character or string to repeat; default `\"0\"`.\n * @returns Padded string.\n */\nexport function padString(\n  str: string,\n  length: number,\n  left: boolean,\n  padding = \"0\",\n): string {\n  const diff = length - str.length;\n  let result = str;\n  if (diff > 0) {\n    const pad = padding.repeat(diff);\n    result = left ? pad + str : str + pad;\n  }\n  return result;\n}\n\n/**\n * Left-pads a string to a minimum character length.\n *\n * @param str - Input string.\n * @param length - Target length (if `str` is longer, it is not truncated).\n * @param padding - Character or string repeated for padding (default `\"0\"`).\n * @returns Padded string.\n */\nexport function padLeft(str: string, length: number, padding = \"0\"): string {\n  return padString(str, length, true, padding);\n}\n\n/**\n * Right-pads a string to a minimum character length.\n *\n * @param str - Input string.\n * @param length - Target length (if `str` is longer, it is not truncated).\n * @param padding - Character or string repeated for padding (default `\"0\"`).\n * @returns Padded string.\n */\nexport function padRight(str: string, length: number, padding = \"0\"): string {\n  return padString(str, length, false, padding);\n}\n\n/**\n * Left-pads a `0`/`1` string with `padding` (default `0`) so the result length is a **multiple of `byteSize`**\n * (default 8). Empty input returns an empty string. Used by {@link numberToBinary} and {@link splitBytes}.\n *\n * @param str - Binary digit string.\n * @param byteSize - Bits per group; default `8`.\n * @param padding - Pad character; default `0`.\n */\nexport function sanitizeBytes(str: string, byteSize = 8, padding = \"0\"): string {\n  return padLeft(str, calcByteLength(str.length, byteSize), padding);\n}\n\n/**\n * Splits a `0`/`1` string into chunks of `byteSize` characters after {@link sanitizeBytes} (default 8).\n * Produces the same groupings as the bytes derived from {@link binaryToArray}. Returns `[]` for empty input\n * (or if `String#match` cannot match, which is defensive for unusual environments).\n *\n * @param str - Binary digit string.\n * @param byteSize - Chunk width in characters; default `8`.\n * @returns Consecutive substrings, each one byte in binary form.\n */\nexport function splitBytes(str: string, byteSize = 8): string[] {\n  const padded = sanitizeBytes(str, byteSize);\n  if (padded.length === 0) {\n    return [];\n  }\n  const m = padded.match(new RegExp(`.{${byteSize}}`, \"gi\"));\n  if (m == null) {\n    return [];\n  }\n  return Array.from(m);\n}\n\n/**\n * Decodes a binary string of `0`/`1` (internally {@link sanitizeBytes} / {@link splitBytes} to full bytes) into a\n * `Uint8Array`. An empty string yields an empty `Uint8Array`.\n *\n * @param bin - `0`/`1` string; non-empty input should have length a multiple of 8 for typical enc-utils behavior.\n */\nexport function binaryToArray(bin: string): Uint8Array {\n  return new Uint8Array(splitBytes(bin).map((x) => Number.parseInt(x, 2)));\n}\n\n/**\n * Encodes a number as **unsigned 32-bit** (`num >>> 0`), then minimal base-2 without leading zero padding\n * in the *integer* part, then {@link sanitizeBytes} to a whole number of 8-bit groups. Same layout as\n * **enc-utils**; used by {@link numberToArray} and {@link numberToHex}.\n *\n * @param num - Any number; only the low 32 unsigned bits are used.\n * @returns Padded `0`/`1` string.\n */\nexport function numberToBinary(num: number): string {\n  const bin = (num >>> 0).toString(2);\n  return sanitizeBytes(bin);\n}\n\n/**\n * Whether the value is a **non-empty** string of only `0`/`1` whose **length** is a multiple of 8.\n * This is the same rule as the \u201Cbinary\u201D branch in {@link getEncoding} (before {@link isHexString} and UTF-8).\n *\n * @param str - Value to test; non-strings and empty strings are `false`.\n * @returns `true` if the value matches the binary string pattern.\n */\nexport function isBinaryString(str: unknown): boolean {\n  if (typeof str !== \"string\" || !/^[01]+$/.test(str)) {\n    return false;\n  }\n  if (str.length % 8 !== 0) {\n    return false;\n  }\n  return true;\n}\n\n/**\n * Whether the string is hex **with a `0x` prefix** and ASCII hex digits only.\n *\n * @remarks\n * Strict enc-utils rule: hex strings **without** `0x` return `false`.\n * The prefix must be exactly lowercase `0x` (not `0X`).\n *\n * @param str - Value to test.\n * @param length - When set, expected **byte** length: the string must be `2 + 2 * length` characters long.\n * @returns `true` if the pattern (and optional length) matches.\n */\nexport function isHexString(str: unknown, length?: number): boolean {\n  if (typeof str !== \"string\" || !/^0x[0-9A-Fa-f]*$/.test(str)) {\n    return false;\n  }\n  if (length !== undefined && str.length !== 2 + 2 * length) {\n    return false;\n  }\n  return true;\n}\n\n/**\n * Whether the value is a Node.js **`Buffer`** instance.\n *\n * @param val - Any value.\n * @returns `false` if `Buffer` is not defined in the environment; otherwise delegates to `Buffer.isBuffer`.\n */\nexport function isBuffer(val: unknown): boolean {\n  const bufferCtor = (globalThis as { Buffer?: { isBuffer(value: unknown): boolean } })\n    .Buffer;\n  if (bufferCtor === undefined) {\n    return false;\n  }\n  return bufferCtor.isBuffer(val);\n}\n\n/**\n * Whether the value is an **ArrayBuffer view** (`TypedArray` / `DataView`), excluding `Buffer`.\n *\n * @param val - Any value.\n * @returns `true` for e.g. `Uint8Array`, `DataView`, etc., but not for `Buffer` or a bare `ArrayBuffer`.\n */\nexport function isTypedArray(val: unknown): boolean {\n  return ArrayBuffer.isView(val) && !isBuffer(val);\n}\n\n/**\n * Whether the value is a bare **`ArrayBuffer`** (not a view or `Buffer`).\n *\n * @param val - Any value.\n */\nexport function isArrayBuffer(val: unknown): boolean {\n  return !isTypedArray(val) && !isBuffer(val) && val instanceof ArrayBuffer;\n}\n\n/**\n * Type tag returned by {@link getType} for binary values, and `typeof` for everything else.\n */\nexport type EncLikeType =\n  | \"string\"\n  | \"number\"\n  | \"bigint\"\n  | \"boolean\"\n  | \"symbol\"\n  | \"undefined\"\n  | \"object\"\n  | \"function\"\n  | typeof TYPE_BUFFER\n  | typeof TYPE_ARRAY\n  | typeof TYPE_TYPED_ARRAY\n  | typeof TYPE_ARRAY_BUFFER;\n\n/**\n * Classifies a value: `Buffer`, typed views, `ArrayBuffer`, then JS arrays; otherwise `typeof val`.\n *\n * @param val - Value to classify.\n * @returns One of the {@link EncLikeType} tags.\n */\nexport function getType(val: unknown): EncLikeType {\n  if (isBuffer(val)) {\n    return TYPE_BUFFER;\n  }\n  if (isTypedArray(val)) {\n    return TYPE_TYPED_ARRAY;\n  }\n  if (isArrayBuffer(val)) {\n    return TYPE_ARRAY_BUFFER;\n  }\n  if (Array.isArray(val)) {\n    return TYPE_ARRAY;\n  }\n  return typeof val as EncLikeType;\n}\n\n/**\n * Heuristic **string** \u201Cencoding\u201D: binary, strict `0x` hex, or UTF-8 by default.\n *\n * @remarks\n * Check order: {@link isBinaryString} \u2192 {@link isHexString} \u2192 otherwise treat as UTF-8 text.\n *\n * @param str - Input string.\n * @returns `\"binary\"`, `\"hex\"`, or `\"utf8\"`.\n */\nexport function getEncoding(\n  str: string,\n): typeof BINARY_ENC | typeof HEX_ENC | typeof UTF8_ENC {\n  if (isBinaryString(str)) {\n    return BINARY_ENC;\n  }\n  if (isHexString(str)) {\n    return HEX_ENC;\n  }\n  return UTF8_ENC;\n}\n\n/**\n * Ensures a `0x` prefix on a hex string (does not duplicate if it already starts with `0x`).\n *\n * @param hex - Hex with or without prefix (does not validate digits).\n */\nexport function addHexPrefix(hex: string): string {\n  return hex.startsWith(\"0x\") ? hex : `0x${hex}`;\n}\n\n/**\n * Strips a leading literal `0x` prefix (lowercase only). Does not change the rest of the string.\n *\n * @param hex - String that may start with `0x`.\n */\nexport function removeHexPrefix(hex: string): string {\n  return hex.replace(/^0x/, \"\");\n}\n\n/**\n * Copies bytes into a **new** `Uint8Array` (same idea as enc-utils `bufferToArray`).\n *\n * @param buf - Source bytes (typically `Uint8Array`).\n */\nexport function bufferToArray(buf: Uint8Array): Uint8Array {\n  return new Uint8Array(buf);\n}\n\n/**\n * Interprets all bytes as one **unsigned** **big-endian** integer (MSB first).\n *\n * @remarks\n * Empty input returns `0`. With many bytes the value may exceed `2^53 - 1`;\n * JavaScript numbers then lose integer precision.\n *\n * @param buf - Byte sequence to interpret.\n */\nexport function bufferToNumber(buf: Uint8Array): number {\n  if (buf.length === 0) {\n    return 0;\n  }\n  let n = 0;\n  for (const byte of buf) {\n    n = (n << 8) | byte;\n  }\n  return n;\n}\n\n/**\n * Copies an octet `ArrayLike` into a new `Uint8Array`.\n *\n * @remarks\n * Historical name `arrayToBuffer`; here the result is always `Uint8Array`, not Node `Buffer`.\n *\n * @param arr - Indexable bytes or octets (e.g. `Uint8Array`, `number[]`).\n */\nexport function arrayToBuffer(arr: ArrayLike<number>): Uint8Array {\n  return Uint8Array.from(arr);\n}\n\n/**\n * Encodes bytes as lowercase hex, with an optional `0x` prefix.\n *\n * @param arr - Bytes to encode.\n * @param prefixed - If `true`, prepends `0x` to the unprefixed hex.\n */\nexport function arrayToHex(arr: Uint8Array, prefixed = false): string {\n  const hex = bufferToHexRaw(arr);\n  return prefixed ? addHexPrefix(hex) : hex;\n}\n\n/**\n * Decodes UTF-8 bytes to a text string.\n *\n * @param arr - Valid UTF-8 bytes.\n */\nexport function arrayToUtf8(arr: Uint8Array): string {\n  return bufferToUtf8(arr);\n}\n\n/**\n * Same as {@link bufferToNumber} applied to `arr`.\n *\n * @param arr - Big-endian bytes.\n */\nexport function arrayToNumber(arr: Uint8Array): number {\n  return bufferToNumber(arr);\n}\n\n/**\n * Decodes hex to bytes. Optional `0x` prefix; delegates to {@link hexToBuffer}.\n *\n * @param hex - Hex string (same rules as `hexToBuffer` in the `encoding` module).\n * @throws If the hex is invalid (odd length, non-hex characters, etc.).\n */\nexport function hexToArray(hex: string): Uint8Array {\n  return new Uint8Array(hexToBuffer(hex));\n}\n\n/**\n * Decodes hex to bytes and interprets them as **UTF-8** to produce a string.\n *\n * @param hex - Hex of the UTF-8 payload.\n * @throws If the hex or UTF-8 bytes are invalid.\n */\nexport function hexToUtf8(hex: string): string {\n  return bufferToUtf8(hexToBuffer(hex));\n}\n\n/**\n * Encodes UTF-8 text to bytes (explicit copy in a new `Uint8Array`).\n *\n * @remarks\n * Practically equivalent to {@link utf8ToBuffer} from the `encoding` module, with a defensive copy.\n *\n * @param utf8 - JavaScript Unicode string (encoded as UTF-8).\n */\nexport function utf8ToArray(utf8: string): Uint8Array {\n  return new Uint8Array(utf8ToBuffer(utf8));\n}\n\n/**\n * Encodes UTF-8 text to lowercase hex, with an optional `0x` prefix.\n *\n * @param utf8 - Input text.\n * @param prefixed - If `true`, result includes a `0x` prefix.\n */\nexport function utf8ToHex(utf8: string, prefixed = false): string {\n  return arrayToHex(utf8ToBuffer(utf8), prefixed);\n}\n\n/**\n * Parses a base-**10** integer from a UTF-8 string.\n *\n * @param utf8 - Decimal string (e.g. `\"42\"`).\n * @returns A safe integer.\n * @throws If parsing does not yield a finite integer in JS safe range.\n */\nexport function utf8ToNumber(utf8: string): number {\n  const num = Number.parseInt(utf8, 10);\n  if (!Number.isFinite(num) || !Number.isSafeInteger(num)) {\n    throw new Error(\"utf8ToNumber: value is not a safe integer\");\n  }\n  return num;\n}\n\n/**\n * Converts a number as **uint32** (`num >>> 0`) to minimal big-endian bytes\n * (bit string padded to a multiple of 8 bits, same logic as enc-utils).\n *\n * @param num - Numeric value; only the low 32 unsigned bits are used.\n */\nexport function numberToArray(num: number): Uint8Array {\n  return binaryToArray(numberToBinary(num));\n}\n\n/**\n * Same as {@link numberToArray} (copy in a new `Uint8Array`).\n *\n * @param num - See {@link numberToArray}.\n */\nexport function numberToBuffer(num: number): Uint8Array {\n  return Uint8Array.from(numberToArray(num));\n}\n\n/**\n * Lowercase hex of the byte layout produced by {@link numberToArray} for `num`, with an optional `0x` prefix.\n *\n * @param num - Integer; uint32 projection as in enc-utils.\n * @param prefixed - Defaults to `false` when omitted.\n */\nexport function numberToHex(num: number, prefixed?: boolean): string {\n  return arrayToHex(numberToArray(num), prefixed ?? false);\n}\n\n/**\n * Converts the number to its decimal string form (`String(num)`).\n *\n * @param num - Input number.\n */\nexport function numberToUtf8(num: number): string {\n  return `${num}`;\n}\n\n/**\n * Trims from the **left** to at most `length` bytes: keeps the **tail** of the buffer.\n *\n * @remarks\n * If `data.length <= length`, returns `data` unchanged (same reference).\n *\n * @param data - Byte sequence.\n * @param length - Maximum number of bytes in the result.\n */\nexport function trimLeft(data: Uint8Array, length: number): Uint8Array {\n  const diff = data.length - length;\n  if (diff > 0) {\n    return data.slice(diff);\n  }\n  return data;\n}\n\n/**\n * Trims from the **right**: keeps the first `length` bytes.\n *\n * @remarks\n * If `length` is greater than the current length, `slice` returns the whole buffer.\n *\n * @param data - Byte sequence.\n * @param length - Number of bytes to keep from the start.\n */\nexport function trimRight(data: Uint8Array, length: number): Uint8Array {\n  return data.slice(0, length);\n}\n", "import {\n  DECOMPRESSED_LENGTH,\n  KEY_LENGTH,\n  PREFIXED_DECOMPRESSED_LENGTH,\n  PREFIXED_KEY_LENGTH,\n} from \"../constants\";\nimport type { Signature, SignResult } from \"./types\";\nimport {\n  bufferToHex,\n  concatBuffers,\n  hexToBuffer,\n  hexToNumber,\n  removeHexLeadingZeros,\n  sanitizeHex,\n} from \"./encoding\";\n\n/**\n * Checks whether a public key is in compressed format.\n * @param publicKey Public key bytes.\n * @returns True when key is compressed.\n */\nexport function isCompressed(publicKey: Uint8Array): boolean {\n  return (\n    publicKey.length === KEY_LENGTH || publicKey.length === PREFIXED_KEY_LENGTH\n  );\n}\n\n/**\n * Checks whether a public key is in uncompressed format.\n * @param publicKey Public key bytes.\n * @returns True when key is uncompressed.\n */\nexport function isDecompressed(publicKey: Uint8Array): boolean {\n  return (\n    publicKey.length === DECOMPRESSED_LENGTH ||\n    publicKey.length === PREFIXED_DECOMPRESSED_LENGTH\n  );\n}\n\n/**\n * Checks whether a public key has SEC1 prefix byte.\n * @param publicKey Public key bytes.\n * @returns True when key includes prefix.\n */\nexport function isPrefixed(publicKey: Uint8Array): boolean {\n  if (isCompressed(publicKey)) {\n    return publicKey.length === PREFIXED_KEY_LENGTH;\n  }\n  return publicKey.length === PREFIXED_DECOMPRESSED_LENGTH;\n}\n\n/**\n * Ensures a public key is SEC1-prefixed.\n * @param publicKey Public key bytes.\n * @returns Prefixed public key bytes.\n */\nexport function sanitizePublicKey(publicKey: Uint8Array): Uint8Array {\n  return isPrefixed(publicKey)\n    ? publicKey\n    : concatBuffers(hexToBuffer(\"04\"), publicKey);\n}\n\n/**\n * Converts recovery id to Ethereum-style recovery byte.\n * @param recoveryParam Recovery id.\n * @returns Recovery byte as Uint8Array.\n */\nexport function exportRecoveryParam(recoveryParam: number): Uint8Array {\n  return hexToBuffer(sanitizeHex((recoveryParam + 27).toString(16)));\n}\n\n/**\n * Converts recovery byte to recovery id.\n * @param v Recovery byte.\n * @returns Recovery id.\n */\nexport function importRecoveryParam(v: Uint8Array): number {\n  return hexToNumber(removeHexLeadingZeros(bufferToHex(v))) - 27;\n}\n\n/**\n * Splits compact signature bytes into r, s, and v components.\n * @param sig Signature bytes.\n * @returns Signature object with r, s, and v.\n */\nexport function splitSignature(sig: Uint8Array): Signature {\n  return {\n    r: sig.slice(0, 32),\n    s: sig.slice(32, 64),\n    v: sig.slice(64, 65),\n  };\n}\n\n/**\n * Joins r, s, and v signature components into byte array.\n * @param sig Signature object.\n * @returns Signature bytes.\n */\nexport function joinSignature(sig: Signature): Uint8Array {\n  return concatBuffers(sig.r, sig.s, sig.v);\n}\n\n/**\n * Checks whether signature bytes look like DER format.\n * @param sig Signature bytes.\n * @returns True when signature appears DER-encoded.\n */\nexport function isValidDERSignature(sig: Uint8Array): boolean {\n  return sig.length > 65 && sig[0] === 0x30;\n}\n\n/**\n * Converts recovered signature bytes into signature and recovery id.\n * @param sig Recovered signature bytes.\n * @returns Signature bytes and recovery id.\n */\nexport function sanitizeRSVSignature(sig: Uint8Array): SignResult {\n  return {\n    signature: sig.slice(0, 64),\n    recovery: importRecoveryParam(sig.slice(64, 65)),\n  };\n}\n", "import {\n  EC_GROUP_ORDER,\n  ERROR_BAD_PRIVATE_KEY,\n  ERROR_BAD_PUBLIC_KEY,\n  ERROR_EMPTY_MESSAGE,\n  ERROR_MESSAGE_TOO_LONG,\n  KEY_LENGTH,\n  LENGTH_0,\n  MAX_KEY_LENGTH,\n  MAX_MSG_LENGTH,\n  PREFIXED_DECOMPRESSED_LENGTH,\n  PREFIXED_KEY_LENGTH,\n  ZERO32,\n} from \"../constants\";\n\n/**\n * Asserts a condition and throws when it fails.\n * @param condition Condition to evaluate.\n * @param message Error message when condition fails.\n */\nexport function assert(condition: boolean, message: string): void {\n  if (!condition) {\n    throw new Error(message || \"Assertion failed\");\n  }\n}\n\n/**\n * Checks whether input is a 32-byte scalar.\n * @param x Input bytes.\n * @returns True when input is a scalar.\n */\nexport function isScalar(x: Uint8Array): boolean {\n  return x instanceof Uint8Array && x.length === 32;\n}\n\n/**\n * Validates a secp256k1 private key range.\n * @param privateKey Private key bytes.\n * @returns True when key is valid.\n */\nexport function isValidPrivateKey(privateKey: Uint8Array): boolean {\n  if (!isScalar(privateKey)) {\n    return false;\n  }\n  return (\n    compareBuffers(privateKey, ZERO32) > 0 &&\n    compareBuffers(privateKey, EC_GROUP_ORDER) < 0\n  );\n}\n\n/**\n * Compares two byte arrays lexicographically.\n * @param a First byte array.\n * @param b Second byte array.\n * @returns -1, 0, or 1 depending on comparison result.\n */\nexport function compareBuffers(a: Uint8Array, b: Uint8Array): number {\n  const len = Math.max(a.length, b.length);\n  for (let i = 0; i < len; i++) {\n    const av = a[i] ?? 0;\n    const bv = b[i] ?? 0;\n    if (av !== bv) {\n      return av < bv ? -1 : 1;\n    }\n  }\n  return 0;\n}\n\n/**\n * Compares two byte arrays in constant time.\n * @param b1 First byte array.\n * @param b2 Second byte array.\n * @returns True when arrays are equal.\n */\nexport function equalConstTime(b1: Uint8Array, b2: Uint8Array): boolean {\n  if (b1.length !== b2.length) {\n    return false;\n  }\n  let res = 0;\n  for (let i = 0; i < b1.length; i++) {\n    res |= b1[i] ^ b2[i];\n  }\n  return res === 0;\n}\n\n/**\n * Validates random key length constraints.\n * @param length Requested length.\n * @returns True when length is valid.\n */\nexport function isValidKeyLength(length: number): boolean {\n  return !(\n    length <= LENGTH_0 ||\n    length > MAX_KEY_LENGTH ||\n    Number.parseInt(String(length), 10) !== length\n  );\n}\n\n/**\n * Validates a private key and throws when invalid.\n * @param privateKey Private key bytes.\n */\nexport function checkPrivateKey(privateKey: Uint8Array): void {\n  assert(privateKey.length === KEY_LENGTH, ERROR_BAD_PRIVATE_KEY);\n  assert(isValidPrivateKey(privateKey), ERROR_BAD_PRIVATE_KEY);\n}\n\n/**\n * Validates a public key and throws when invalid.\n * @param publicKey Public key bytes.\n */\nexport function checkPublicKey(publicKey: Uint8Array): void {\n  assert(\n    publicKey.length === PREFIXED_DECOMPRESSED_LENGTH ||\n      publicKey.length === PREFIXED_KEY_LENGTH,\n    ERROR_BAD_PUBLIC_KEY\n  );\n  if (publicKey.length === PREFIXED_DECOMPRESSED_LENGTH) {\n    assert(publicKey[0] === 4, ERROR_BAD_PUBLIC_KEY);\n  }\n  if (publicKey.length === PREFIXED_KEY_LENGTH) {\n    assert(publicKey[0] === 2 || publicKey[0] === 3, ERROR_BAD_PUBLIC_KEY);\n  }\n}\n\n/**\n * Validates message bytes and throws when invalid.\n * @param msg Message bytes.\n */\nexport function checkMessage(msg: Uint8Array): void {\n  assert(msg.length > 0, ERROR_EMPTY_MESSAGE);\n  assert(msg.length <= MAX_MSG_LENGTH, ERROR_MESSAGE_TOO_LONG);\n}\n"],
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