@iota/bcs/dist/esm/uleb.js

BCS - Canonical Binary Serialization implementation for JavaScript

function ulebEncode(num) {
  const arr = [];
  let len = 0;
  if (num === 0) {
    return [0];
  }
  while (num > 0) {
    arr[len] = num & 127;
    if (num >>= 7) {
      arr[len] |= 128;
    }
    len += 1;
  }
  return arr;
}
function ulebDecode(arr) {
  let total = 0;
  let shift = 0;
  let len = 0;
  while (true) {
    const byte = arr[len];
    len += 1;
    total |= (byte & 127) << shift;
    if ((byte & 128) === 0) {
      break;
    }
    shift += 7;
  }
  return {
    value: total,
    length: len
  };
}
export {
  ulebDecode,
  ulebEncode
};
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