391dff16fe
Assume that when a wallet transaction has a valid block hash and transaction position in it, the transaction is actually there. We're already trusting wallet data in a much more fundamental way anyway. To prevent backward compatibility issues, a new record is used for storing the block locator in the wallet. Old wallets will see a wallet file synchronized up to the genesis block, and rescan automatically.
4.9 KiB
(note: this is a temporary file, to be added-to by anybody, and moved to release-notes at release time)
Notable changes
SSL support for RPC dropped
SSL support for RPC, previously enabled by the option rpcssl has been dropped
from both the client and the server. This was done in preparation for removing
the dependency on OpenSSL for the daemon completely.
Trying to use rpcssl will result in an error:
Error: SSL mode for RPC (-rpcssl) is no longer supported.
If you are one of the few people that relies on this feature, a flexible
migration path is to use stunnel. This is an utility that can tunnel
arbitrary TCP connections inside SSL. On e.g. Ubuntu it can be installed with:
sudo apt-get install stunnel4
Then, to tunnel a SSL connection on 28332 to a RPC server bound on localhost on port 18332 do:
stunnel -d 28332 -r 127.0.0.1:18332 -p stunnel.pem -P ''
It can also be set up system-wide in inetd style.
Another way to re-attain SSL would be to setup a httpd reverse proxy. This solution would allow the use of different authentication, loadbalancing, on-the-fly compression and caching. A sample config for apache2 could look like:
Listen 443
NameVirtualHost *:443
<VirtualHost *:443>
SSLEngine On
SSLCertificateFile /etc/apache2/ssl/server.crt
SSLCertificateKeyFile /etc/apache2/ssl/server.key
<Location /bitcoinrpc>
ProxyPass http://127.0.0.1:8332/
ProxyPassReverse http://127.0.0.1:8332/
# optional enable digest auth
# AuthType Digest
# ...
# optional bypass bitcoind rpc basic auth
# RequestHeader set Authorization "Basic <hash>"
# get the <hash> from the shell with: base64 <<< bitcoinrpc:<password>
</Location>
# Or, balance the load:
# ProxyPass / balancer://balancer_cluster_name
</VirtualHost>
Random-cookie RPC authentication
When no -rpcpassword is specified, the daemon now uses a special 'cookie'
file for authentication. This file is generated with random content when the
daemon starts, and deleted when it exits. Its contents are used as
authentication token. Read access to this file controls who can access through
RPC. By default it is stored in the data directory but its location can be
overridden with the option -rpccookiefile.
This is similar to Tor's CookieAuthentication: see https://www.torproject.org/docs/tor-manual.html.en
This allows running bitcoind without having to do any manual configuration.
Low-level RPC API changes
- Monetary amounts can be provided as strings. This means that for example the argument to sendtoaddress can be "0.0001" instead of 0.0001. This can be an advantage if a JSON library insists on using a lossy floating point type for numbers, which would be dangerous for monetary amounts.
Option parsing behavior
Command line options are now parsed strictly in the order in which they are
specified. It used to be the case that -X -noX ends up, unintuitively, with X
set, as -X had precedence over -noX. This is no longer the case. Like for
other software, the last specified value for an option will hold.
NODE_BLOOM service bit
Support for the NODE_BLOOM service bit, as described in BIP
111, has been
added to the P2P protocol code.
BIP 111 defines a service bit to allow peers to advertise that they support bloom filters (such as used by SPV clients) explicitly. It also bumps the protocol version to allow peers to identify old nodes which allow bloom filtering of the connection despite lacking the new service bit.
In this version, it is only enforced for peers that send protocol versions
>=70011. For the next major version it is planned that this restriction will be
removed. It is recommended to update SPV clients to check for the NODE_BLOOM
service bit for nodes that report versions newer than 70011.
Merkle branches removed from wallet
Previously, every wallet transaction stored a Merkle branch to prove its presence in blocks. This wasn't being used for more than an expensive sanity check. Since 0.12, these are no longer stored. When loading a 0.12 wallet into an older version, it will automatically rescan to avoid failed checks.
0.12.0 Change log
Detailed release notes follow. This overview includes changes that affect behavior, not code moves, refactors and string updates. For convenience in locating the code changes and accompanying discussion, both the pull request and git merge commit are mentioned.
RPC and REST
Configuration and command-line options
Block and transaction handling
P2P protocol and network code
Validation
Build system
Wallet
GUI
Tests
Miscellaneous
- Removed bitrpc.py from contrib