Merge bitcoin/bitcoin#24845: wallet: return error msg for "too-long-mempool-chain"

f3221d373a test: add wallet too-long-mempool-chain error coverage (furszy)
acf0119d24 wallet: return error msg for too-long-mempool-chain failure (furszy)

Pull request description:

  Fixes #23144.

  We currently return a general "Insufficient funds" from Coin
  Selection when we actually skipped unconfirmed UTXOs that
  surpassed the mempool ancestors limit.

  This PR make the error clearer by returning:
  "Unconfirmed UTXOs are available, but spending them creates
  a chain of transactions that will be rejected by the mempool"

  Also, added an early return from Coin Selection if the sum of
  the discarded coins decreases the available balance below the
  target amount.

ACKs for top commit:
  achow101:
    ACK f3221d373a
  S3RK:
    Code review ACK f3221d373a
  Xekyo:
    ACK f3221d373a

Tree-SHA512: 13e5824b75ac302280ff894560a4ebf32a74f32fe49ef8281f2bc99c0104b92cef33d3b143c6e131f3a07eafe64533af7fc60abff585142c134b9d6e531a6a66
This commit is contained in:
glozow
2023-03-23 15:44:42 +00:00
2 changed files with 67 additions and 4 deletions

View File

@@ -32,6 +32,7 @@ class CreateTxWalletTest(BitcoinTestFramework):
self.test_anti_fee_sniping()
self.test_tx_size_too_large()
self.test_create_too_long_mempool_chain()
def test_anti_fee_sniping(self):
self.log.info('Check that we have some (old) blocks and that anti-fee-sniping is disabled')
@@ -80,6 +81,30 @@ class CreateTxWalletTest(BitcoinTestFramework):
)
self.nodes[0].settxfee(0)
def test_create_too_long_mempool_chain(self):
self.log.info('Check too-long mempool chain error')
df_wallet = self.nodes[0].get_wallet_rpc(self.default_wallet_name)
self.nodes[0].createwallet("too_long")
test_wallet = self.nodes[0].get_wallet_rpc("too_long")
tx_data = df_wallet.send(outputs=[{test_wallet.getnewaddress(): 25}], options={"change_position": 0})
txid = tx_data['txid']
vout = 1
options = {"change_position": 0, "add_inputs": False}
for i in range(1, 25):
options['inputs'] = [{'txid': txid, 'vout': vout}]
tx_data = test_wallet.send(outputs=[{test_wallet.getnewaddress(): 25 - i}], options=options)
txid = tx_data['txid']
# Sending one more chained transaction will fail
options = {"minconf": 0, "include_unsafe": True, 'add_inputs': True}
assert_raises_rpc_error(-4, "Unconfirmed UTXOs are available, but spending them creates a chain of transactions that will be rejected by the mempool",
test_wallet.send, outputs=[{test_wallet.getnewaddress(): 0.3}], options=options)
test_wallet.unloadwallet()
if __name__ == '__main__':
CreateTxWalletTest().main()