fix: Unable to export private key for Cardano single-chain account

packages/engine/src/vaults/impl/ada/Vault.ts

@@ -7,12 +7,12 @@ import { isUndefined } from 'lodash';
 import { TransactionStatus } from '@onekeyhq/engine/src/types/provider';
 import type { PartialTokenInfo } from '@onekeyhq/engine/src/types/provider';
 import { getTimeDurationMs } from '@onekeyhq/kit/src/utils/helper';
+import { COINTYPE_ADA } from '@onekeyhq/shared/src/engine/engineConsts';
 import {
-  COINTYPE_ADA,
-  IMPL_ADA,
-} from '@onekeyhq/shared/src/engine/engineConsts';
+  isHdWallet,
+  isImportedWallet,
+} from '@onekeyhq/shared/src/engine/engineUtils';
 import debugLogger from '@onekeyhq/shared/src/logger/debugLogger';
-import platformEnv from '@onekeyhq/shared/src/platformEnv';
 import { memoizee } from '@onekeyhq/shared/src/utils/cacheUtils';
 
 import {
@@ -22,10 +22,7 @@ import {
   OneKeyInternalError,
   PreviousAccountIsEmpty,
 } from '../../../errors';
-import {
-  getDefaultPurpose,
-  getLastAccountId,
-} from '../../../managers/derivation';
+import { getLastAccountId } from '../../../managers/derivation';
 import { getAccountNameInfoByTemplate } from '../../../managers/impl';
 import { AccountType } from '../../../types/account';
 import {
@@ -39,6 +36,7 @@ import { validBootstrapAddress, validShelleyAddress } from './helper/addresses';
 import {
   decodePrivateKeyByXprv,
   generateExportedCredential,
+  generateExportedCredentialForImportedAccount,
 } from './helper/bip32';
 import { getChangeAddress } from './helper/cardanoUtils';
 import ClientAda from './helper/ClientAda';
@@ -52,6 +50,7 @@ import settings from './settings';
 import type { ExportedSeedCredential } from '../../../dbs/base';
 import type { Account, DBUTXOAccount } from '../../../types/account';
 import type { Token } from '../../../types/token';
+import type { KeyringSoftwareBase } from '../../keyring/KeyringSoftwareBase';
 import type {
   IApproveInfo,
   IDecodedTx,
@@ -224,13 +223,24 @@ export default class Vault extends VaultBase {
   }
 
   override async getExportedCredential(password: string): Promise<string> {
-    const { entropy } = (await this.engine.dbApi.getCredential(
-      this.walletId,
-      password,
-    )) as ExportedSeedCredential;
-
-    const dbAccount = (await this.getDbAccount()) as DBUTXOAccount;
-    return generateExportedCredential(password, entropy, dbAccount.path);
+    if (isHdWallet({ walletId: this.walletId })) {
+      const { entropy } = (await this.engine.dbApi.getCredential(
+        this.walletId,
+        password,
+      )) as ExportedSeedCredential;
+      const dbAccount = (await this.getDbAccount()) as DBUTXOAccount;
+      return generateExportedCredential(password, entropy, dbAccount.path);
+    }
+    if (isImportedWallet({ walletId: this.walletId })) {
+      const account = await this.getDbAccount();
+      const keyring = this.keyring as KeyringSoftwareBase;
+      const privateKeys = await keyring.getPrivateKeys(password);
+      return generateExportedCredentialForImportedAccount(
+        password,
+        privateKeys[account.path],
+      );
+    }
+    throw new Error('Not implemented');
   }
 
   override attachFeeInfoToEncodedTx(params: {

packages/engine/src/vaults/impl/ada/helper/bip32.ts

@@ -7,6 +7,8 @@ import { bech32, mnemonicToRootKeypair, toPublic } from 'cardano-crypto.js';
 
 import { mnemonicFromEntropy } from '@onekeyhq/engine/src/secret';
 
+import { decrypt } from '../../../../secret/encryptors/aes256';
+
 import { DERIVATION_SCHEME, HARDENED_THRESHOLD } from './constants';
 
 import type { BIP32Path } from '../types';
@@ -75,6 +77,24 @@ export async function generateExportedCredential(
   return xprv;
 }
 
+export async function generateExportedCredentialForImportedAccount(
+  password: string,
+  encodedPrivateKey: Buffer,
+) {
+  const privateKey = decrypt(password, encodedPrivateKey);
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
+  const { rootKey, index } = encodePrivateKey(privateKey);
+  const xprv = bech32.encode(
+    'xprv',
+    Buffer.concat([
+      rootKey.slice(0, 64),
+      rootKey.slice(96, 128),
+      Buffer.from(index, 'utf8'),
+    ]),
+  ) as string;
+  return Promise.resolve(xprv);
+}
+
 /*
  * @param xprv xprv string, 165 length, generate from OneKey wallet
  */

packages/shared/src/engine/engineUtils.ts

@@ -6,6 +6,7 @@ import {
   WALLET_TYPE_EXTERNAL,
   WALLET_TYPE_HD,
   WALLET_TYPE_HW,
+  WALLET_TYPE_IMPORTED,
   WALLET_TYPE_WATCHING,
 } from '@onekeyhq/engine/src/types/wallet';
 import type { Wallet } from '@onekeyhq/engine/src/types/wallet';
@@ -45,6 +46,11 @@ export function isHardwareWallet({ walletId }: { walletId: string }) {
   return !!(walletId && walletId.startsWith(`${WALLET_TYPE_HW}-`));
 }
 
+// walletIsImported
+export function isImportedWallet({ walletId }: { walletId: string }) {
+  return !!(walletId && walletId.startsWith(`${WALLET_TYPE_IMPORTED}`));
+}
+
 export function isExternalWallet({ walletId }: { walletId: string }) {
   return !!(walletId && walletId === WALLET_TYPE_EXTERNAL);
 }