Fix/1981/Duplicate - Unregistered users mixed up - filter CSRs on replicated event

CHANGELOG.md

@@ -1,5 +1,7 @@
 [unreleased]
 
+* Filter CSRs - remove old csrs and replace with new for each pubkey
+
 * Fixed mobile bugs - joining by QR code and not showing username taken screen for user who has unique name
 
 * Use context menu for information about unregistered username instead screen

packages/backend/src/nest/storage/storage.service.spec.ts

@@ -1,6 +1,6 @@
 import { LazyModuleLoader } from '@nestjs/core'
 import { Test, TestingModule } from '@nestjs/testing'
-import { createUserCert, keyFromCertificate, parseCertificate } from '@quiet/identity'
+import { createUserCert, keyFromCertificate, loadCSR, parseCertificate } from '@quiet/identity'
 import {
   prepareStore,
   getFactory,
@@ -579,6 +579,31 @@ describe('StorageService', () => {
         },
       ])
     })
+
+    it('Filter CSRs - remove old csrs and replace with new for each pubkey', async () => {
+      const allCsrs = [
+        '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',
+
+        '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',
+
+        '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',
+
+        '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',
+
+        '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',
+      ]
+
+      const filteredCsrs = await storageService.filterCsrs(allCsrs)
+
+      expect(filteredCsrs.length).toEqual(allCsrs.length - 1)
+
+      expect(filteredCsrs).toEqual([
+        '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',
+        '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',
+        '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',
+        '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',
+      ])
+    })
   })
 
   describe('Files deletion', () => {

packages/backend/src/nest/storage/storage.service.ts

@@ -9,6 +9,7 @@ import {
   verifyUserCert,
   parseCertificationRequest,
   getReqFieldValue,
+  loadCSR,
 } from '@quiet/identity'
 import type { IPFS } from 'ipfs-core'
 import OrbitDB from 'orbit-db'
@@ -400,8 +401,11 @@ export class StorageService extends EventEmitter {
     this.certificatesRequests.events.on('replicated', async () => {
       this.logger('REPLICATED: CSRs')
       const allCsrs = this.getAllEventLogEntries(this.certificatesRequests)
+
+      const filteredCsrs = await this.filterCsrs(allCsrs)
+
       const allCertificates = this.getAllEventLogEntries(this.certificates)
-      this.emit(StorageEvents.REPLICATED_CSR, { csrs: allCsrs, certificates: allCertificates })
+      this.emit(StorageEvents.REPLICATED_CSR, { csrs: filteredCsrs, certificates: allCertificates })
       await this.updatePeersList()
     })
     this.certificatesRequests.events.on('write', async (_address, entry) => {
@@ -419,6 +423,25 @@ export class StorageService extends EventEmitter {
     this.logger('STORAGE: Finished creating certificatesRequests db')
   }
 
+  public async filterCsrs(allCsrs: string[]): Promise<string[]> {
+    const filteredCsrsMap: Map<string, string> = new Map()
+
+    await Promise.all(
+      allCsrs.map(async csr => {
+        const parsedCsr = await loadCSR(csr)
+        const pubKey = keyFromCertificate(parsedCsr)
+
+        if (filteredCsrsMap.has(pubKey)) {
+          filteredCsrsMap.delete(pubKey)
+        }
+
+        filteredCsrsMap.set(pubKey, csr)
+      })
+    )
+
+    return [...filteredCsrsMap.values()]
+  }
+
   public async loadAllChannels() {
     this.logger('Getting all channels')
     // @ts-expect-error - OrbitDB's type declaration of `load` lacks 'options'