Open yoroi, then open developer tools. In the JS console paste the following code:
/**
* Export all data from an IndexedDB database
*
* @param {IDBDatabase} idbDatabase The database to export from
* @return {Promise<string>}
*/
function exportToJson(idbDatabase) {
return new Promise((resolve, reject) => {
const exportObject = {}
if (idbDatabase.objectStoreNames.length === 0) {
resolve(JSON.stringify(exportObject))
} else {
const transaction = idbDatabase.transaction(
idbDatabase.objectStoreNames,
'readonly'
)
transaction.addEventListener('error', reject)
for (const storeName of idbDatabase.objectStoreNames) {
const allObjects = []
transaction
.objectStore(storeName)
.openCursor()
.addEventListener('success', event => {
const cursor = event.target.result
if (cursor) {
// Cursor holds value, put it into store data
allObjects.push(cursor.value)
cursor.continue()
} else {
// No more values, store is done
exportObject[storeName] = allObjects
// Last store was handled
if (
idbDatabase.objectStoreNames.length ===
Object.keys(exportObject).length
) {
resolve(JSON.stringify(exportObject))
}
}
})
}
}
})
}
/**
* Import data from JSON into an IndexedDB database.
* This does not delete any existing data from the database, so keys may clash.
*
* @param {IDBDatabase} idbDatabase Database to import into
* @param {string} json Data to import, one key per object store
* @return {Promise<void>}
*/
function importFromJson(idbDatabase, json) {
return new Promise((resolve, reject) => {
const transaction = idbDatabase.transaction(
idbDatabase.objectStoreNames,
'readwrite'
)
transaction.addEventListener('error', reject)
var importObject = JSON.parse(json)
for (const storeName of idbDatabase.objectStoreNames) {
let count = 0
for (const toAdd of importObject[storeName]) {
const request = transaction.objectStore(storeName).add(toAdd)
request.addEventListener('success', () => {
count++
if (count === importObject[storeName].length) {
// Added all objects for this store
delete importObject[storeName]
if (Object.keys(importObject).length === 0) {
// Added all object stores
resolve()
}
}
})
}
}
})
}
/**
* Clear a database
*
* @param {IDBDatabase} idbDatabase The database to delete all data from
* @return {Promise<void>}
*/
function clearDatabase(idbDatabase) {
return new Promise((resolve, reject) => {
const transaction = idbDatabase.transaction(
idbDatabase.objectStoreNames,
'readwrite'
)
transaction.addEventListener('error', reject)
let count = 0
for (const storeName of idbDatabase.objectStoreNames) {
transaction
.objectStore(storeName)
.clear()
.addEventListener('success', () => {
count++
if (count === idbDatabase.objectStoreNames.length) {
// Cleared all object stores
resolve()
}
})
}
})
}
Export
var connection = indexedDB.open('yoroi-schema', 16) // change the name and version as needed
connection.onsuccess = e => {
var database = e.target.result
exportToJson(database).then(console.log).catch(console.error)
}
Import
var connection = indexedDB.open('yoroi-schema', 16) // change the name and version as needed
connection.onsuccess = e => {
var database = e.target.result
clearDatabase(database)
importFromJson(database, json).then(console.log).catch(console.error)
}
