Transaction malleability-related fixes
--------------------------------------
This release contains a few fixes for transaction ID (TXID) malleability
issues:
- -nospendzeroconfchange command-line option, to avoid spending
zero-confirmation change
- IsStandard() transaction rules tightened to prevent relaying and mining of
mutated transactions
- Additional information in listtransactions/gettransaction output to
report wallet transactions that conflict with each other because
they spend the same outputs.
- Bug fixes to the getbalance/listaccounts RPC commands, which would report
incorrect balances for double-spent (or mutated) transactions.
- New option: -zapwallettxes to rebuild the wallet's transaction information
Bitcoin developers released the new version of client software which includes the fixes for transaction malleability bug. This bug enabled attacks on Bitcoin exchanges.
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