@polkadot/types/metadata/v9/toV10.js

// Copyright 2017-2022 @polkadot/types authors & contributors
// SPDX-License-Identifier: Apache-2.0
// migrate a storage hasher type
// see https://github.com/paritytech/substrate/pull/4462

/** @internal */
function createStorageHasher(registry, hasher) {
  // Blake2_128_Concat has been added at index 2, so we increment all the
  // indexes greater than 2
  if (hasher.toNumber() >= 2) {
    return registry.createTypeUnsafe('StorageHasherV10', [hasher.toNumber() + 1]);
  }

  return registry.createTypeUnsafe('StorageHasherV10', [hasher]);
}
/** @internal */


function createStorageType(registry, entryType) {
  if (entryType.isMap) {
    return [{ ...entryType.asMap,
      hasher: createStorageHasher(registry, entryType.asMap.hasher)
    }, 1];
  }

  if (entryType.isDoubleMap) {
    return [{ ...entryType.asDoubleMap,
      hasher: createStorageHasher(registry, entryType.asDoubleMap.hasher),
      key2Hasher: createStorageHasher(registry, entryType.asDoubleMap.key2Hasher)
    }, 2];
  }

  return [entryType.asPlain, 0];
}
/** @internal */


function convertModule(registry, mod) {
  const storage = mod.storage.unwrapOr(null);
  return registry.createTypeUnsafe('ModuleMetadataV10', [{ ...mod,
    storage: storage ? { ...storage,
      items: storage.items.map(item => ({ ...item,
        type: registry.createTypeUnsafe('StorageEntryTypeV10', createStorageType(registry, item.type))
      }))
    } : null
  }]);
}
/** @internal */


export function toV10(registry, {
  modules
}) {
  return registry.createTypeUnsafe('MetadataV10', [{
    modules: modules.map(mod => convertModule(registry, mod))
  }]);
}