@hazae41/ledger/dist/esm/mods/hid/index.mjs.map

Private and supply-chain hardened Ledger controller for TypeScript

{"version":3,"file":"index.mjs","sources":["../../../../src/mods/hid/index.ts"],"sourcesContent":["import { Opaque, Readable, Writable } from \"@hazae41/binary\"\nimport { Cursor } from \"@hazae41/cursor\"\n\nexport class InvalidHidTagError extends Error {\n  readonly #class = InvalidHidTagError\n  readonly name = this.#class.name\n\n  constructor(\n    readonly tag: number\n  ) {\n    super(`Invalid HID tag ${tag}`)\n  }\n\n}\n\nexport class HidFrame<T extends Writable> {\n  readonly #class = HidFrame\n\n  static readonly tag = 0x05 as const\n\n  constructor(\n    readonly channel: number,\n    readonly fragment: T,\n    readonly index: number,\n  ) { }\n\n  sizeOrThrow() {\n    return 2 + 1 + 2 + this.fragment.sizeOrThrow()\n  }\n\n  writeOrThrow(cursor: Cursor) {\n    cursor.writeUint16OrThrow(this.channel)\n    cursor.writeUint8OrThrow(this.#class.tag)\n    cursor.writeUint16OrThrow(this.index)\n    this.fragment.writeOrThrow(cursor)\n  }\n\n  static readOrThrow(cursor: Cursor): HidFrame<Opaque> {\n    const channel = cursor.readUint16OrThrow()\n    const tag = cursor.readUint8OrThrow()\n\n    if (tag !== this.tag)\n      throw new InvalidHidTagError(tag)\n\n    const index = cursor.readUint16OrThrow()\n    const bytes = cursor.readAndCopyOrThrow(cursor.remaining)\n    const fragment = new Opaque(bytes)\n\n    return new HidFrame(channel, fragment, index)\n  }\n\n  static *splitOrThrow(channel: number, bytes: Uint8Array) {\n    const chunks = new Cursor(bytes).splitOrThrow(59)\n\n    let chunk = chunks.next()\n\n    for (let i = 0; !chunk.done; chunk = chunks.next(), i++)\n      yield new HidFrame(channel, new Opaque(chunk.value), i)\n\n    return chunk.value\n  }\n\n  static async unsplitOrThrow(channel: number, generator: AsyncGenerator<HidFrame<Opaque>, never, unknown>) {\n    const first = await generator.next()\n\n    if (first.done)\n      return first.value\n\n    const frames = Readable.readFromBytesOrThrow(HidContainer, first.value.fragment.bytes)\n\n    const bytes = new Uint8Array(frames.length)\n    const cursor = new Cursor(bytes)\n\n    cursor.writeOrThrow(frames.fragment.bytes.slice(0, cursor.remaining))\n\n    if (!cursor.remaining)\n      return cursor.bytes\n\n    let frame = await generator.next()\n\n    for (; !frame.done; frame = await generator.next()) {\n      cursor.writeOrThrow(frame.value.fragment.bytes.slice(0, cursor.remaining))\n\n      if (!cursor.remaining)\n        return cursor.bytes\n\n      continue\n    }\n\n    return frame.value\n  }\n\n}\n\nexport class HidContainer<T extends Writable> {\n\n  constructor(\n    readonly length: number,\n    readonly fragment: T,\n  ) { }\n\n  static newOrThrow<T extends Writable>(fragment: T): HidContainer<T> {\n    return new HidContainer(fragment.sizeOrThrow(), fragment)\n  }\n\n  sizeOrThrow() {\n    return Math.ceil((2 + this.length) / 59) * 59\n  }\n\n  writeOrThrow(cursor: Cursor) {\n    cursor.writeUint16OrThrow(this.length)\n    this.fragment.writeOrThrow(cursor)\n    cursor.fillOrThrow(0, cursor.remaining)\n  }\n\n  static readOrThrow(cursor: Cursor): HidContainer<Opaque> {\n    const length = cursor.readUint16OrThrow()\n    const bytes = cursor.readAndCopyOrThrow(cursor.remaining)\n    const fragment = new Opaque(bytes)\n\n    return new HidContainer(length, fragment)\n  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