walletdb: fix convert_version_58 for partial local txs

The transaction dict can also contain PSBTs (in addition to complete raw hex txs).
This is the case if the user has saved a partial (e.g. unsigned) tx as local into the history.

fixes https://github.com/spesmilo/electrum/issues/8913

electrum/wallet_db.py

@@ -40,7 +40,7 @@ from . import util, bitcoin
 from .util import profiler, WalletFileException, multisig_type, TxMinedInfo, bfh, MyEncoder
 from .invoices import Invoice, Request
 from .keystore import bip44_derivation
-from .transaction import Transaction, TxOutpoint, tx_from_any, PartialTransaction, PartialTxOutput
+from .transaction import Transaction, TxOutpoint, tx_from_any, PartialTransaction, PartialTxOutput, BadHeaderMagic
 from .logging import Logger
 
 from .lnutil import LOCAL, REMOTE, HTLCOwner, ChannelType
@@ -1119,7 +1119,10 @@ class WalletDBUpgrader(Logger):
         transactions = self.get('transactions', {})  # txid -> raw_tx
         prevouts_by_scripthash = {}
         for txid, raw_tx in transactions.items():
-            tx = Transaction(raw_tx)
+            try:
+                tx = PartialTransaction.from_raw_psbt(raw_tx)
+            except BadHeaderMagic:
+                tx = Transaction(raw_tx)
             for idx, txout in enumerate(tx.outputs()):
                 outpoint = f"{txid}:{idx}"
                 scripthash = script_to_scripthash(txout.scriptpubkey.hex())

tests/test_storage_upgrade.py

@@ -313,6 +313,14 @@ class TestStorageUpgrade(WalletTestCase):
         wallet_str = self._get_wallet_str()
         await self._upgrade_storage(wallet_str)
 
+    @as_testnet
+    async def test_upgrade_from_client_4_5_2_9dk_with_ln(self):
+        # This is a realistic testnet wallet, from the "9dk" seed, including some lightning sends/receives,
+        # some labels, frozen addresses, saved local txs, invoices/requests, etc. The file also has partial writes.
+        # Also, regression test for #8913
+        wallet_str = self._get_wallet_str()
+        await self._upgrade_storage(wallet_str)
+
 ##########
 
     plugins: 'electrum.plugin.Plugins'