Fixes#737. Before this commit, startup of
Joinmarket-Qt does not necessarily work "out
of the box" due to changes in PyQt 5.15 that
create external dependencies on shared libraries,
see comments on the Issue for details.
While we had formerly pinned PyQt 5.14, it is
in fact necessary to also pin the version of
PySide2 to the same 5.14.2 to remove the
problem.
As of 13 March the latest pytest breaks the twisted tests.
As a result the version is pinned until that can be fixed.
Additionally, at the same time, the bitcoin ppa has been
removed and so cannot be used in our travis testing setup.
Hence we install bitcoin directly (for tests only, of course)
from bitcoin.org,
copying bitcoind and bitcoin-cli to `/usr/local/lib`.
updated xenial and stretch dockerfiles since they bundle old versions of libsodium
refacatoring to make BlockchainInterface and BitcoinCoreNoHistoryInterface python2 compatible
add the -acceptnonstdtxn flag when invoking bitcoind for versions >= 0.19.0
refactor the use of nonlocal to make it compatible with python2
document the get_bitcoind_version method
Adam Gibson
Kristaps Kaupe
Alessio Caiazza
Tim Akinbo