84 lines
1.9 KiB
JavaScript
84 lines
1.9 KiB
JavaScript
|
import BloomFilter from 'bloomfilter.js'
|
||
|
|
|
||
|
|
import { download } from '@/store/snark'
|
||
|
|
|
||
|
|
class BloomService {
|
||
|
|
constructor({ amount, commitment, instanceName, fileName, fileFolder }) {
|
||
|
|
this.amount = amount
|
||
|
|
this.fileFolder = fileFolder
|
||
|
|
this.commitment = commitment
|
||
|
|
this.instanceName = instanceName
|
||
|
|
this.fileName = `${fileFolder}/${fileName}`
|
||
|
|
|
||
|
|
this.idb = window.$nuxt.$indexedDB
|
||
|
|
}
|
||
|
|
|
||
|
|
async downloadBloom() {
|
||
|
|
const cachedBloom = await download({
|
||
|
|
name: this.fileName,
|
||
|
|
contentType: 'string',
|
||
|
|
eventName: this.fileFolder
|
||
|
|
})
|
||
|
|
|
||
|
|
if (!cachedBloom) {
|
||
|
|
throw new Error('Cant download file')
|
||
|
|
}
|
||
|
|
|
||
|
|
return BloomFilter.deserialize(cachedBloom)
|
||
|
|
}
|
||
|
|
|
||
|
|
async getBloomFromDB() {
|
||
|
|
try {
|
||
|
|
const stringifyCachedBloom = await this.idb.getAll({
|
||
|
|
storeName: `stringify_bloom_${this.instanceName}`
|
||
|
|
})
|
||
|
|
|
||
|
|
if (!stringifyCachedBloom || !stringifyCachedBloom.length) {
|
||
|
|
return undefined
|
||
|
|
}
|
||
|
|
|
||
|
|
const [{ tree }] = stringifyCachedBloom
|
||
|
|
|
||
|
|
return BloomFilter.deserialize(tree)
|
||
|
|
} catch (err) {
|
||
|
|
return undefined
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
async getBloomFromCache() {
|
||
|
|
try {
|
||
|
|
const bloom = await this.downloadBloom()
|
||
|
|
await this.saveBloom({ bloom })
|
||
|
|
|
||
|
|
return bloom
|
||
|
|
} catch (err) {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
async checkBloom() {
|
||
|
|
let cachedBloom = await this.getBloomFromDB()
|
||
|
|
if (!cachedBloom) {
|
||
|
|
cachedBloom = await this.getBloomFromCache()
|
||
|
|
}
|
||
|
|
return cachedBloom.test(this.commitment)
|
||
|
|
}
|
||
|
|
|
||
|
|
async saveBloom({ bloom }) {
|
||
|
|
try {
|
||
|
|
await this.idb.putItem({
|
||
|
|
storeName: `stringify_bloom_${this.instanceName}`,
|
||
|
|
data: {
|
||
|
|
hashBloom: '1', // need for replace bloom
|
||
|
|
tree: bloom.serialize()
|
||
|
|
},
|
||
|
|
key: 'hashBloom'
|
||
|
|
})
|
||
|
|
} catch (err) {
|
||
|
|
console.error('saveBloom has error:', err.message)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
export const bloomService = (payload) => new BloomService(payload)
|