const version = 23 /* This migration removes transactions that are no longer usefull down to 40 total */ const clone = require('clone') 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 { TransactionController } = newState if (TransactionController && TransactionController.transactions) { const transactions = newState.TransactionController.transactions if (transactions.length <= 40) return newState let reverseTxList = transactions.reverse() let stripping = true while (reverseTxList.length > 40 && stripping) { let txIndex = reverseTxList.findIndex((txMeta) => { return (txMeta.status === 'failed' || txMeta.status === 'rejected' || txMeta.status === 'confirmed' || txMeta.status === 'dropped') }) if (txIndex < 0) stripping = false else reverseTxList.splice(txIndex, 1) } newState.TransactionController.transactions = reverseTxList.reverse() } return newState }