Programming language: Rust
License: GNU General Public License v3.0 only

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The Parity Bitcoin client.


Build Status Snap Status

Gitter Gitter https://gitter.im/paritytech/parity-bitcoin

Installing from source

Installing pbtc from source requires rustc and cargo.

Minimal supported version is rustc 1.23.0 (766bd11c8 2018-01-01)

Install rustc and cargo

Both rustc and cargo are a part of rust tool-chain.

An easy way to install the stable binaries for Linux and Mac is to run this in your shell:

curl -sSf https://static.rust-lang.org/rustup.sh | sh

Windows binaries can be downloaded from rust-lang website.

Install C and C++ compilers

You will need the cc and gcc compilers to build some of the dependencies.

sudo apt-get update
sudo apt-get install build-essential

Clone and build pbtc

Now let's clone pbtc and enter it's directory:

git clone https://github.com/paritytech/parity-bitcoin
cd parity-bitcoin

pbtc can be build in two modes. --debug and --release. Debug is the default.

# builds pbtc in debug mode
cargo build -p pbtc
# builds pbtc in release mode
cargo build -p pbtc --release

pbtc is now available at either ./target/debug/pbtc or ./target/release/pbtc.

Installing the snap

In any of the supported Linux distros:

sudo snap install parity-bitcoin --edge

Running tests

pbtc has internal unit tests and it conforms to external integration tests.

Running unit tests

Assuming that repository is already cloned, we can run unit tests with this command:

cargo test --all

Running external integration tests

Running integration tests is automated, as the regtests repository is one of the submodules. Let's download it first:

git submodule update --init

Now we can run them using the command:


It is also possible to run regtests manually:

# let's start pbtc in regtest compatible mode
./target/release/pbtc --btc --regtest

# now in second shell window
cd $HOME
git clone https://github.com/TheBlueMatt/test-scripts
cd test-scripts
java -jar pull-tests-f56eec3.jar

Going online

By default parity connects to bitcoind-seednodes. Full list is available [here](./pbtc/seednodes.rs).

Before starting synchronization, you must decide - which fork to follow - Bitcoin Core (--btc flag) or Bitcoin Cash (--bch flag). On next start, passing the same flag is optional, as the database is already bound to selected fork and won't be synchronized using other verification rules.

To start syncing the main network, just start the client, passing selected fork flag. For example:

./target/release/pbtc --btc

To start syncing the testnet:

./target/release/pbtc --btc --testnet

To not print any syncing progress add --quiet flag:

./target/release/pbtc --btc --quiet

Importing bitcoind database

It is possible to import existing bitcoind database:

# where $BITCOIND_DB is path to your bitcoind database, e.g., "/Users/user/Library/Application Support"
./target/release/pbtc import "$BITCOIND_DB/Bitcoin/blocks"

By default import verifies imported the blocks. You can disable this, by adding --verification-level=none flag.

./target/release/pbtc --btc --verification-level=none import "$BITCOIND_DB/Bitcoin/blocks"

Command line interface

Full list of CLI options, which is available under pbtc --help:

pbtc 0.1.0
Parity Technologies <[email protected]>
Parity Bitcoin client


        --bch             Use Bitcoin Cash verification rules (BCH).
        --btc             Use Bitcoin Core verification rules (BTC).
    -h, --help            Prints help information
        --no-jsonrpc      Disable the JSON-RPC API server.
    -q, --quiet           Do not show any synchronization information in the console.
        --regtest         Use a private network for regression tests.
        --testnet         Use the test network (Testnet3).
    -V, --version         Prints version information

        --blocknotify <COMMAND>            Execute COMMAND when the best block changes (%s in COMMAND is replaced by the block hash).
    -c, --connect <IP>                     Connect only to the specified node.
    -d, --data-dir <PATH>                  Specify the database and configuration directory PATH.
        --db-cache <SIZE>                  Sets the database cache size.
        --jsonrpc-apis <APIS>              Specify the APIs available through the JSONRPC interface. APIS is a comma-delimited list of API names.
        --jsonrpc-cors <URL>               Specify CORS header for JSON-RPC API responses.
        --jsonrpc-hosts <HOSTS>            List of allowed Host header values.
        --jsonrpc-interface <INTERFACE>    The hostname portion of the JSONRPC API server.
        --jsonrpc-port <PORT>              Specify the PORT for the JSONRPC API server.
        --only-net <NET>                   Only connect to nodes in network version <NET> (ipv4 or ipv6).
        --port <PORT>                      Listen for connections on PORT.
    -s, --seednode <IP>                    Connect to a seed-node to retrieve peer addresses, and disconnect.
        --verification-edge <BLOCK>        Non-default verification-level is applied until a block with given hash is met.
        --verification-level <LEVEL>       Sets the Blocks verification level to full (default), header (scripts are not verified), or none (no verification at all).

    help        Prints this message or the help of the given subcommand(s)
    import      Import blocks from a Bitcoin Core database.
    rollback    Rollback the database to given canonical-chain block.


The JSON-RPC interface is served on port :8332 for mainnet and :18332 for testnet unless you specified otherwise. So if you are using testnet, you will need to change the port in the sample curl requests shown below.


The Parity-bitcoin network interface.


Add the node.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "addnode", "params": ["", "add"], "id":1 }' localhost:8332

Remove the node.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "addnode", "params": ["", "remove"], "id":1 }' localhost:8332

Connect to the node.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "addnode", "params": ["", "onetry"], "id":1 }' localhost:8332

Query info for all added nodes.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "id":"1", "method": "getaddednodeinfo", "params": [true] }' localhost:8332

Query info for the specified node.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "id":"1", "method": "getaddednodeinfo", "params": [true, ""] }' localhost:8332

Get the peer count.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "id":"1", "method": "getconnectioncount", "params": [] }' localhost:8332


The Parity-bitcoin blockchain data interface.


Get hash of best block.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "getbestblockhash", "params": [], "id":1 }' localhost:8332

Get height of best block.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "getblockcount", "params": [], "id":1 }' localhost:8332

Get hash of block at given height.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "getblockhash", "params": [0], "id":1 }' localhost:8332

Get proof-of-work difficulty as a multiple of the minimum difficulty

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "getdifficulty", "params": [], "id":1 }' localhost:8332

Get information on given block.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "getblock", "params": ["000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"], "id":1 }' localhost:8332

Get details about an unspent transaction output.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "gettxout", "params": ["4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b", 0], "id":1 }' localhost:8332

Get statistics about the unspent transaction output set.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "gettxoutsetinfo", "params": [], "id":1 }' localhost:8332


The Parity-bitcoin miner data interface.


Get block template for mining.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "getblocktemplate", "params": [{"capabilities": ["coinbasetxn", "workid", "coinbase/append"]}], "id":1 }' localhost:8332


The Parity-bitcoin raw data interface.


Return the raw transaction data.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "getrawtransaction", "params": ["4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"], "id":1 }' localhost:8332

Return an object representing the serialized, hex-encoded transaction.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "decoderawtransaction", "params": ["01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac00000000"], "id":1 }' localhost:8332

Create a transaction spending the given inputs and creating new outputs.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "createrawtransaction", "params": [[{"txid":"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b","vout":0}],{"1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa":0.01}], "id":1 }' localhost:8332

Adds transaction to the memory pool && relays it to the peers.

curl -H 'content-type: application/json' --data-binary '{"jsonrpc": "2.0", "method": "sendrawtransaction", "params": ["01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac00000000"], "id":1 }' localhost:8332


This is a section only for developers and power users.

You can enable detailed client logging by setting the environment variable RUST_LOG, e.g.,

RUST_LOG=verification=info ./target/release/pbtc --btc

pbtc started with this environment variable will print all logs coming from verification module with verbosity info or higher. Available log levels are:

  • error
  • warn
  • info
  • debug
  • trace

It's also possible to start logging from multiple modules in the same time:

RUST_LOG=sync=trace,p2p=trace,verification=trace,db=trace ./target/release/pbtc --btc

Internal documentation

Once released, pbtc documentation will be available here. Meanwhile it's only possible to build it locally:

cd parity-bitcoin
open target/doc/pbtc/index.html