a032fa30d282fa69c304e0afd1f95f67c55d22e3 multiprocess: add interfaces::ExternalSigner class (Russell Yanofsky) Pull request description: Add `interfaces::ExternalSigner` class to let signer objects be passed between processes and let signer code run in the original process where the object was created. --- This PR is part of the [process separation project](https://github.com/bitcoin/bitcoin/projects/10). ACKs for top commit: laanwj: Concept and code review ACK a032fa30d282fa69c304e0afd1f95f67c55d22e3 hebasto: re-ACK a032fa30d282fa69c304e0afd1f95f67c55d22e3 Tree-SHA512: 99a729fb3a64d010e142cc778a9f1f358e58345b77faaf2664de7d2277715d59df3352326e8f0f2a6628038670eaa4556310a549079fb28af6d2eeb05aea1460
src/node/
The src/node/ directory contains code that needs to access node state
(state in CChain, CBlockIndex, CCoinsView, CTxMemPool, and similar
classes).
Code in src/node/ is meant to be segregated from code in
src/wallet/ and src/qt/, to ensure wallet and GUI
code changes don't interfere with node operation, to allow wallet and GUI code
to run in separate processes, and to perhaps eventually allow wallet and GUI
code to be maintained in separate source repositories.
As a rule of thumb, code in one of the src/node/,
src/wallet/, or src/qt/ directories should avoid
calling code in the other directories directly, and only invoke it indirectly
through the more limited src/interfaces/ classes.
This directory is at the moment
sparsely populated. Eventually more substantial files like
src/validation.cpp and
src/txmempool.cpp might be moved there.