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[wallet] randomly generate change targets

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If the wallet always chooses 1 million sats as its change target, it is
easier to fingerprint transactions created by the Core wallet.
This commit is contained in:
glozow
2022-03-07 13:46:49 +00:00
parent 1e52e6bd0a
commit a44236addd
4 changed files with 47 additions and 4 deletions
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4
test/functional/wallet_bumpfee.py
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@@ -442,7 +442,9 @@ def test_watchonly_psbt(self, peer_node, rbf_node, dest_address):
self.generate(peer_node, 1)
# Create single-input PSBT for transaction to be bumped
psbt = watcher.walletcreatefundedpsbt([], {dest_address: 0.0005}, 0, {"fee_rate": 1}, True)['psbt']
# Ensure the payment amount + change can be fully funded using one of the 0.001BTC inputs.
psbt = watcher.walletcreatefundedpsbt([watcher.listunspent()[0]], {dest_address: 0.0005}, 0,
{"fee_rate": 1, "add_inputs": False}, True)['psbt']
psbt_signed = signer.walletprocesspsbt(psbt=psbt, sign=True, sighashtype="ALL", bip32derivs=True)
psbt_final = watcher.finalizepsbt(psbt_signed["psbt"])
original_txid = watcher.sendrawtransaction(psbt_final["hex"])