56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
const version = 18
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/*
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This migration updates "transaction state history" to diffs style
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*/
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const clone = require('clone')
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const txStateHistoryHelper = require('../controllers/transactions/lib/tx-state-history-helper')
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module.exports = {
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version,
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migrate: function (originalVersionedData) {
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const versionedData = clone(originalVersionedData)
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versionedData.meta.version = version
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try {
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const state = versionedData.data
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const newState = transformState(state)
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versionedData.data = newState
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} catch (err) {
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console.warn(`MetaMask Migration #${version}` + err.stack)
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}
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return Promise.resolve(versionedData)
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},
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}
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function transformState (state) {
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const newState = state
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const { TransactionController } = newState
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if (TransactionController && TransactionController.transactions) {
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const transactions = newState.TransactionController.transactions
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newState.TransactionController.transactions = transactions.map((txMeta) => {
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// no history: initialize
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if (!txMeta.history || txMeta.history.length === 0) {
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const snapshot = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
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txMeta.history = [snapshot]
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return txMeta
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}
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// has history: migrate
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const newHistory = (
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txStateHistoryHelper.migrateFromSnapshotsToDiffs(txMeta.history)
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// remove empty diffs
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.filter((entry) => {
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return !Array.isArray(entry) || entry.length > 0
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})
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)
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txMeta.history = newHistory
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return txMeta
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})
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}
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return newState
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}
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