17220d6325
This avoid calling out to mempool state during coin selection, balance calculation, etc. In the next commit we ensure all wallet callbacks from CValidationInterface happen in the same queue, serialized with each other. This helps to avoid re-introducing one of the issues described in #9584 [1] by further disconnecting wallet from current chain/mempool state. Thanks to @morcos for the suggestion to do this. Note that there are several race conditions introduced here: * If a user calls sendrawtransaction from RPC, adding a transaction which is "trusted" (ie from them) and pays them change, it may not be immediately used by coin selection until the notification callbacks finish running. No such race is introduced in normal transaction-sending RPCs as this case is explicitly handled. * Until Block{Connected,Disconnected} and TransactionAddedToMempool calls also run in the CSceduler background thread, there is a race where TransactionAddedToMempool might be called after a Block{Connected,Disconnected} call happens. * Wallet will write a new best chain from the SetBestChain callback prior to having processed the transaction from that block. [1] "you could go to select coins, need to use 0-conf change, but such 0-conf change may have been included in a block who's callbacks have not yet been processed - resulting in thinking they are not in mempool and, thus, not selectable." |
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| share | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| autogen.sh | ||
| configure.ac | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| INSTALL.md | ||
| libbitcoinconsensus.pc.in | ||
| Makefile.am | ||
| README.md | ||
Bitcoin Core integration/staging tree
What is Bitcoin?
Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.
For more information, as well as an immediately useable, binary version of the Bitcoin Core software, see https://bitcoin.org/en/download, or read the original whitepaper.
License
Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.
Development Process
The master branch is regularly built and tested, but is not guaranteed to be
completely stable. Tags are created
regularly to indicate new official, stable release versions of Bitcoin Core.
The contribution workflow is described in CONTRIBUTING.md.
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Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.
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