1
0
mirror of https://github.com/kremalicious/metamask-extension.git synced 2024-12-23 09:52:26 +01:00
metamask-extension/app/scripts/migrations/018.js
2017-08-14 20:05:57 -07:00

53 lines
1.4 KiB
JavaScript

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