mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-12-23 09:52:26 +01:00
72 lines
2.0 KiB
JavaScript
72 lines
2.0 KiB
JavaScript
import { cloneDeep } from 'lodash';
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import { toChecksumAddress } from 'ethereumjs-util';
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const version = 39;
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const DAI_V1_CONTRACT_ADDRESS = '0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359';
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const DAI_V1_TOKEN_SYMBOL = 'DAI';
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const SAI_TOKEN_SYMBOL = 'SAI';
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function isOldDai(token = {}) {
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return (
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token &&
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typeof token === 'object' &&
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token.symbol === DAI_V1_TOKEN_SYMBOL &&
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toChecksumAddress(token.address) === DAI_V1_CONTRACT_ADDRESS
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);
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}
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/**
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* This migration renames the Dai token to Sai.
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*
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* As of 2019-11-18 Dai is now called Sai (refs https://git.io/JeooP) to facilitate
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* Maker's upgrade to Multi-Collateral Dai and this migration renames the token
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* at the old address.
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*/
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export default {
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version,
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async migrate(originalVersionedData) {
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const versionedData = cloneDeep(originalVersionedData);
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versionedData.meta.version = version;
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const state = versionedData.data;
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versionedData.data = transformState(state);
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return versionedData;
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},
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};
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function transformState(state) {
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const { PreferencesController } = state;
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if (PreferencesController) {
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const tokens = PreferencesController.tokens || [];
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if (Array.isArray(tokens)) {
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for (const token of tokens) {
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if (isOldDai(token)) {
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token.symbol = SAI_TOKEN_SYMBOL;
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}
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}
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}
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const accountTokens = PreferencesController.accountTokens || {};
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if (accountTokens && typeof accountTokens === 'object') {
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for (const address of Object.keys(accountTokens)) {
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const networkTokens = accountTokens[address];
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if (networkTokens && typeof networkTokens === 'object') {
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for (const network of Object.keys(networkTokens)) {
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const tokensOnNetwork = networkTokens[network];
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if (Array.isArray(tokensOnNetwork)) {
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for (const token of tokensOnNetwork) {
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if (isOldDai(token)) {
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token.symbol = SAI_TOKEN_SYMBOL;
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}
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}
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}
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}
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}
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}
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}
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}
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return state;
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}
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