218 lines
8.5 KiB
Markdown
218 lines
8.5 KiB
Markdown
(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](https://github.com/bitcoin/bips/blob/master/bip-0111.mediawiki), 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.
|
|
|
|
Any sequence of pushdatas in OP_RETURN outputs now allowed
|
|
----------------------------------------------------------
|
|
|
|
Previously OP_RETURN outputs with a payload were only relayed and mined if they
|
|
had a single pushdata. This restriction has been lifted to allow any
|
|
combination of data pushes and numeric constant opcodes (OP_1 to OP_16). The
|
|
limit on OP_RETURN output size is now applied to the entire serialized
|
|
scriptPubKey, 83 bytes by default. (the previous 80 byte default plus three
|
|
bytes overhead)
|
|
|
|
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.
|
|
|
|
BIP65 - CHECKLOCKTIMEVERIFY
|
|
---------------------------
|
|
|
|
Previously it was impossible to create a transaction output that was guaranteed
|
|
to be unspendable until a specific date in the future. CHECKLOCKTIMEVERIFY is a
|
|
new opcode that allows a script to check if a specific block height or time has
|
|
been reached, failing the script otherwise. This enables a wide variety of new
|
|
functionality such as time-locked escrows, secure payment channels, etc.
|
|
|
|
BIP65 implements CHECKLOCKTIMEVERIFY by introducing block version 4, which adds
|
|
additional restrictions to the NOP2 opcode. The same miner-voting mechanism as
|
|
in BIP34 and BIP66 is used: when 751 out of a sequence of 1001 blocks have
|
|
version number 4 or higher, the new consensus rule becomes active for those
|
|
blocks. When 951 out of a sequence of 1001 blocks have version number 4 or
|
|
higher, it becomes mandatory for all blocks and blocks with versions less than
|
|
4 are rejected.
|
|
|
|
Bitcoin Core's block templates are now for version 4 blocks only, and any
|
|
mining software relying on its `getblocktemplate` must be updated in parallel
|
|
to use either libblkmaker version FIXME or any version from 0.5.1 onward. If
|
|
you are solo mining, this will affect you the moment you upgrade Bitcoin Core,
|
|
which must be done prior to BIP65 achieving its 951/1001 status. If you are
|
|
mining with the stratum mining protocol: this does not affect you. If you are
|
|
mining with the getblocktemplate protocol to a pool: this will affect you at
|
|
the pool operator's discretion, which must be no later than BIP65 achieving its
|
|
951/1001 status.
|
|
|
|
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
|
|
|
|
Asm representations of scriptSig signatures now contain SIGHASH type decodes
|
|
----------------------------------------------------------------------------
|
|
|
|
The `asm` property of each scriptSig now contains the decoded signature hash
|
|
type for each signature that provides a valid defined hash type.
|
|
|
|
The following items contain assembly representations of scriptSig signatures
|
|
and are affected by this change:
|
|
|
|
- RPC `getrawtransaction`
|
|
- RPC `decoderawtransaction`
|
|
- REST `/rest/tx/` (JSON format)
|
|
- REST `/rest/block/` (JSON format when including extended tx details)
|
|
- `bitcoin-tx -json`
|
|
|
|
For example, the `scriptSig.asm` property of a transaction input that
|
|
previously showed an assembly representation of:
|
|
|
|
304502207fa7a6d1e0ee81132a269ad84e68d695483745cde8b541e3bf630749894e342a022100c1f7ab20e13e22fb95281a870f3dcf38d782e53023ee313d741ad0cfbc0c509001
|
|
|
|
now shows as:
|
|
|
|
304502207fa7a6d1e0ee81132a269ad84e68d695483745cde8b541e3bf630749894e342a022100c1f7ab20e13e22fb95281a870f3dcf38d782e53023ee313d741ad0cfbc0c5090[ALL]
|
|
|
|
Note that the output of the RPC `decodescript` did not change because it is
|
|
configured specifically to process scriptPubKey and not scriptSig scripts.
|
|
|
|
### 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
|
|
|
|
Addition of ZMQ-based Notifications
|
|
==================================
|
|
|
|
Bitcoind can now (optionally) asynchronously notify clients through a
|
|
ZMQ-based PUB socket of the arrival of new transactions and blocks.
|
|
This feature requires installation of the ZMQ C API library 4.x and
|
|
configuring its use through the command line or configuration file.
|
|
Please see docs/zmq.md for details of operation.
|