3da0e16012
The global unsigned tx is decomposed into separate fields inside of PSBT, which mirrors what PSBTv2 will do. However, we still need to get the global unsigned tx so PSBT::GetUnsignedTx is introduced to do that. In order to also have a stable unique ID, we also introduce PSBT::GetUniqueID to replace uses of PSBT.tx.GetHash().
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.