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metamask-extension/app/scripts/migrations/056.js

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import { cloneDeep } from 'lodash';
const version = 56;
/**
* Remove tokens that don't have an address due to
* lack of previous addToken validation. Also removes
* an unwanted, undefined image property
*/
export default {
version,
async migrate(originalVersionedData) {
const versionedData = cloneDeep(originalVersionedData);
versionedData.meta.version = version;
const { PreferencesController } = versionedData.data;
if (Array.isArray(PreferencesController.tokens)) {
PreferencesController.tokens = PreferencesController.tokens.filter(
({ address }) => address,
);
}
if (
PreferencesController.accountTokens &&
typeof PreferencesController.accountTokens === 'object'
) {
Object.keys(PreferencesController.accountTokens).forEach((account) => {
const chains = Object.keys(
PreferencesController.accountTokens[account],
);
chains.forEach((chain) => {
PreferencesController.accountTokens[account][
chain
] = PreferencesController.accountTokens[account][chain].filter(
({ address }) => address,
);
});
});
}
if (
PreferencesController.assetImages &&
'undefined' in PreferencesController.assetImages
) {
delete PreferencesController.assetImages.undefined;
}
return versionedData;
},
};