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metamask-extension/app/scripts/migrations/023.js

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/*
This migration removes transactions that are no longer usefull down to 40 total
*/
import { cloneDeep } from 'lodash'
import { TRANSACTION_STATUSES } from '../../../shared/constants/transaction'
const version = 23
export default {
version,
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migrate(originalVersionedData) {
const versionedData = cloneDeep(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)
},
}
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function transformState(state) {
const newState = state
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const { TransactionController } = newState
if (TransactionController && TransactionController.transactions) {
const { transactions } = newState.TransactionController
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if (transactions.length <= 40) {
return newState
}
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const reverseTxList = transactions.reverse()
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let stripping = true
while (reverseTxList.length > 40 && stripping) {
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const txIndex = reverseTxList.findIndex((txMeta) => {
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return (
txMeta.status === TRANSACTION_STATUSES.FAILED ||
txMeta.status === TRANSACTION_STATUSES.REJECTED ||
txMeta.status === TRANSACTION_STATUSES.CONFIRMED ||
txMeta.status === TRANSACTION_STATUSES.DROPPED
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)
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})
if (txIndex < 0) {
stripping = false
} else {
reverseTxList.splice(txIndex, 1)
}
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}
newState.TransactionController.transactions = reverseTxList.reverse()
}
return newState
}