gistfile1.txt

const getStorageItemKeyMin = ({ hash, prefix }: StorageItemsKey): Buffer => {
  if (hash === undefined || hash.length === 0) {
    return bytewise.encode(bytewise.sorts.array.bound.lower([storageItemKeyPrefix]));
  }

  if (prefix === undefined || prefix.length === 0) {
    return bytewise.encode(bytewise.sorts.array.bound.lower([storageItemKeyPrefix, common.uInt160ToBuffer(hash)]));
  }

  return bytewise.encode(
    bytewise.sorts.array.bound.lower([
      storageItemKeyPrefix,
      common.uInt160ToBuffer(hash),
      bytewise.sorts.binary.bound.lower(prefix),
    ]),
  );
};
const getStorageItemKeyMax = ({ hash, prefix }: StorageItemsKey): Buffer => {
  if (hash === undefined || hash.length === 0) {
    return bytewise.encode(bytewise.sorts.array.bound.upper([storageItemKeyPrefix]));
  }

  if (prefix === undefined || prefix.length === 0) {
    return bytewise.encode(bytewise.sorts.array.bound.upper([storageItemKeyPrefix, common.uInt160ToBuffer(hash)]));
  }

  return bytewise.encode(
    bytewise.sorts.array.bound.upper([
      storageItemKeyPrefix,
      common.uInt160ToBuffer(hash),
      bytewise.sorts.binary.bound.upper(prefix),
    ]),
  );
};