Check and generate address

packages/neuron-wallet/src/database/address/address-dao.ts

@@ -96,10 +96,28 @@ export default class AddressDao {
         && value.txCount === 0
     })
     return addresses.sort((lhs, rhs) => {
-      return lhs.addressIndex < rhs.addressIndex ? 1 : -1
+      return lhs.addressIndex - rhs.addressIndex
     })[0]
   }
 
+  public static unusedAddressesCount(walletId: string, version: AddressVersion): [number, number] {
+    const addresses = AddressStore.getAll()
+    const receivingCount = addresses.filter(value => {
+      return value.walletId === walletId
+        && value.version === version
+        && value.addressType == AddressType.Receiving
+        && value.txCount === 0
+    }).length
+    const changeCount = addresses.filter(value => {
+      return value.walletId === walletId
+        && value.version === version
+        && value.addressType == AddressType.Change
+        && value.txCount === 0
+    }).length
+
+    return [receivingCount, changeCount]
+  }
+
   public static nextUnusedChangeAddress(walletId: string, version: AddressVersion): Address | undefined {
     const addresses = AddressStore.getAll().filter(value => {
       return value.walletId === walletId
@@ -108,7 +126,7 @@ export default class AddressDao {
         && value.txCount === 0
     })
     return addresses.sort((lhs, rhs) => {
-      return lhs.addressIndex < rhs.addressIndex ? 1 : -1
+      return lhs.addressIndex - rhs.addressIndex
     })[0]
   }
 

packages/neuron-wallet/src/services/addresses.ts

@@ -71,16 +71,15 @@ export default class AddressService {
     changeAddressCount: number = 10
   ) => {
     const addressVersion = AddressService.getAddressVersion()
-    const maxIndexReceivingAddress = AddressDao.maxAddressIndex(walletId, AddressType.Receiving, addressVersion)
-    const maxIndexChangeAddress = AddressDao.maxAddressIndex(walletId, AddressType.Change, addressVersion)
+    const [unusedReceivingCount, unusedChangeCount] = AddressDao.unusedAddressesCount(walletId, addressVersion)
     if (
-      maxIndexReceivingAddress !== undefined &&
-      maxIndexReceivingAddress.txCount === 0 &&
-      maxIndexChangeAddress !== undefined &&
-      maxIndexChangeAddress.txCount === 0
+      unusedReceivingCount > 3 &&
+      unusedChangeCount > 3
     ) {
       return undefined
     }
+    const maxIndexReceivingAddress = AddressDao.maxAddressIndex(walletId, AddressType.Receiving, addressVersion)
+    const maxIndexChangeAddress = AddressDao.maxAddressIndex(walletId, AddressType.Change, addressVersion)
     const nextReceivingIndex = maxIndexReceivingAddress === undefined ? 0 : maxIndexReceivingAddress.addressIndex + 1
     const nextChangeIndex = maxIndexChangeAddress === undefined ? 0 : maxIndexChangeAddress.addressIndex + 1
     return AddressService.generateAndSave(

packages/neuron-wallet/tests/database/address/dao.test.ts

@@ -17,6 +17,21 @@ describe('Address Dao tests', () => {
     version: AddressVersion.Testnet,
   }
 
+  const address2: Address = {
+    walletId: '1',
+    address: 'ckt1qyqrdsefa43s6m882pcj53m4gdnj4k440axqswmu83',
+    path: "m/44'/309'/0'/0/1",
+    addressType: AddressType.Receiving,
+    addressIndex: 1,
+    txCount: 0,
+    liveBalance: '0',
+    sentBalance: '0',
+    pendingBalance: '0',
+    balance: '0',
+    blake160: '0x36c329ed630d6ce750712a477543672adab57f4c',
+    version: AddressVersion.Testnet,
+  }
+
   const usedAddress: Address = {
     walletId: '2',
     address: 'ckt1qyqrdsefa43s6m882pcj53m4gdnj4k440axqswmu83',
@@ -135,4 +150,19 @@ describe('Address Dao tests', () => {
 
     expect(one!.address).toEqual(address.address)
   })
+
+  it('unusedAddressesCount', () => {
+    AddressDao.create([address, changeAddress])
+
+    const counts = AddressDao.unusedAddressesCount(address.walletId, AddressVersion.Testnet)
+    expect(counts).toEqual([1, 1])
+  })
+
+  it('nextUnusedAddress', () => {
+    AddressDao.create([address, address2])
+
+    const next = AddressDao.nextUnusedAddress('1', AddressVersion.Testnet)
+
+    expect(next!.address).toEqual(address.address)
+  })
 })