Crash at fundrawtransaction

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#1,255 opened on Aug 8, 2023 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 35/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: cpp
Domain: blockchain

Research direction

Start at wallet/spend.cpp:1449 and trace the fundrawtransaction path around the reported assertion in CWallet::CreateTransactionInternal. Use the provided production log and multi-sig wallet context to reproduce the failure; done means fundrawtransaction no longer aborts under the reported conditions.

Written by the indexing model from the issue text.

Description

needs reproduction

2023-08-08T07:23:35Z UpdateTip: new best=78b7897fac1fbe95d92f5724b1cd506fc6d1bb03710f17b36754d13f578a9555 height=2460677 version=0x20000000 tx=3918616 date='2023-08-08T07:23:08Z' progress=1.000000 cache=0.2MiB(699txo)
elementsd: wallet/spend.cpp:1449: bool CWallet::CreateTransactionInternal(const std::vector<CRecipient>&, CTransactionRef&, CAmount&, int&, bilingual_str&, const CCoinControl&, FeeCalculation&, bool, BlindDetails*, const IssuanceDetails*): Assertion `coin_selection_params.m_subtract_fee_outputs || fee_needed <= map_change_and_fee.at(policyAsset) - change_amount' failed.

This occured in the production blockchain, with a multi-sig (2-of-3) wallet.
Reproduction rate was quite high, but finally the transaction was created.

Version: 22.1.1
Platform: Linux (Ubuntu 22 LTS) in docker

More details (except the wallet) are available on request, if needed.

Dominant language: C++
Stars: 1.2k
Forks: 418
Avg merge: 1d 12h
Merged PRs (30d): 13

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