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Текущая директория: /opt/BitGoJS/node_modules/@ledgerhq/devices/lib-es/ble

Просмотр файла: sendAPDU.js

import { Observable } from "rxjs";
import { log } from "@ledgerhq/logs";
const TagId = 0x05;

function chunkBuffer(buffer, sizeForIndex) {
  const chunks = [];

  for (let i = 0, size = sizeForIndex(0); i < buffer.length; i += size, size = sizeForIndex(i)) {
    chunks.push(buffer.slice(i, i + size));
  }

  return chunks;
}

export const sendAPDU = (write, apdu, mtuSize) => {
  const chunks = chunkBuffer(apdu, i => mtuSize - (i === 0 ? 5 : 3)).map((buffer, i) => {
    const head = Buffer.alloc(i === 0 ? 5 : 3);
    head.writeUInt8(TagId, 0);
    head.writeUInt16BE(i, 1);

    if (i === 0) {
      head.writeUInt16BE(apdu.length, 3);
    }

    return Buffer.concat([head, buffer]);
  });
  return Observable.create(o => {
    let terminated = false;

    async function main() {
      for (const chunk of chunks) {
        if (terminated) return;
        await write(chunk);
      }
    }

    main().then(() => {
      terminated = true;
      o.complete();
    }, e => {
      terminated = true;
      log("ble-error", "sendAPDU failure " + String(e));
      o.error(e);
    });

    const unsubscribe = () => {
      if (!terminated) {
        log("ble-verbose", "sendAPDU interruption");
        terminated = true;
      }
    };

    return unsubscribe;
  });
};
//# sourceMappingURL=sendAPDU.js.map

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