11 KiB
Rosetta Bitcoin
ROSETTA-BITCOIN IS CONSIDERED ALPHA SOFTWARE. USE AT YOUR OWN RISK! COINBASE ASSUMES NO RESPONSIBILITY NOR LIABILITY IF THERE IS A BUG IN THIS IMPLEMENTATION.
Overview
rosetta-bitcoin provides a reference implementation of the Rosetta API for
Bitcoin in Golang. If you haven't heard of the Rosetta API, you can find more
information here.
Features
- Rosetta API implementation (both Data API and Construction API)
- UTXO cache for all accounts (accessible using
/account/balance) - Stateless, offline, curve-based transaction construction from any SegWit-Bech32 Address
Usage
As specified in the Rosetta API Principles,
all Rosetta implementations must be deployable via Docker and support running via either an
online or offline mode.
To build a Docker image from this repository, run the command make build. To start
rosetta-bitcoin, you can run:
make run-mainnet-onlinemake run-mainnet-offlinemake run-testnet-onlinemake run testnet-offline
By default, running these commands will create a data directory at <working directory>/bitcoin-data
and start the rosetta-bitcoin server at port 8080.
System Requirements
rosetta-bitcoin has been tested on an AWS c5.2xlarge instance.
This instance type has 8 vCPU and 16 GB of RAM. If you use a computer with less than 16 GB of RAM,
it is possible that rosetta-bitcoin will exit with an OOM error.
Recommended OS Settings
To increase the load rosetta-bitcoin can handle, it is recommended to tune your OS
settings to allow for more connections. On a linux-based OS, you can run the following
commands (source):
sysctl -w net.ipv4.tcp_tw_reuse=1
sysctl -w net.core.rmem_max=16777216
sysctl -w net.core.wmem_max=16777216
sysctl -w net.ipv4.tcp_max_syn_backlog=10000
sysctl -w net.core.somaxconn=10000
sysctl -p (when done)
We have not tested rosetta-bitcoin with net.ipv4.tcp_tw_recycle and do not recommend
enabling it.
You should also modify your open file settings to 100000. This can be done on a linux-based OS
with the command: ulimit -n 100000.
Architecture
rosetta-bitcoin uses the syncer, storage, parser, and server package
from rosetta-sdk-go instead
of a new Bitcoin-specific implementation of packages of similar functionality. Below
you can find a high-level overview of how everything fits together:
+------------------------------------------------------------------+
| |
| +--------------------------------------+ |
| | | |
| | indexer | |
| | | |
| | +--------+ | |
+-------------------+ pruner <----------+ | |
| | +--------+ | | |
+-----v----+ | | | |
| bitcoind | | +------+--------+ | |
+-----+----+ | +--------> block_storage <----+ | |
| | | +---------------+ | | |
| | +---+----+ | | |
+-------------------> syncer | | | |
| +---+----+ | | |
| | +--------------+ | | |
| +--------> coin_storage | | | |
| +------^-------+ | | |
| | | | |
+--------------------------------------+ |
| | |
+-------------------------------------------------------------------------------------------+ |
| | | | |
| +------------------------------------------------------------+ | | |
| | | | |
| | +---------------------+-----------------------+------+ | |
| | | | | | |
| +-------+---------+ +-------+---------+ +-------+-------+ +-----------+----------+ | |
| | account_service | | network_service | | block_service | | construction_service +--------+
| +-----------------+ +-----------------+ +---------------+ +----------------------+ |
| |
| server |
| |
+-------------------------------------------------------------------------------------------+
Optimizations
- Automatically prune bitcoind while indexing blocks
- Reduce sync time with concurrent block indexing
- Use Zstandard compression to reduce the size of data stored on disk without needing to write a manual byte-level encoding
Concurrent Block Syncing
To speed up indexing, rosetta-bitcoin uses concurrent block processing
with a "wait free" design (using channels instead of sleeps to signal
which threads are unblocked). This allows rosetta-bitcoin to fetch
multiple inputs from disk while it waits for inputs that appeared
in recently processed blocks to save to disk.
+----------+
| bitcoind |
+-----+----+
|
|
+---------+ fetch block data / unpopulated txs |
| block 1 <------------------------------------+
+---------+ |
+--> tx 1 | |
| +---------+ |
| | tx 2 | |
| +----+----+ |
| | |
| | +---------+ |
| | | block 2 <-------------------+
| | +---------+ |
| +-----------> tx 3 +--+ |
| +---------+ | |
+-------------------> tx 4 | | |
| +---------+ | |
| | |
| retrieve previously synced | +---------+ |
| inputs needed for future | | block 3 <--+
| blocks while waiting for | +---------+
| populated blocks to save to +---> tx 5 |
| disk +---------+
+------------------------------------> tx 6 |
| +---------+
|
|
+------+--------+
| coin_storage |
+---------------+
Testing with rosetta-cli
To validate rosetta-bitcoin, install rosetta-cli
and run one of the following commands:
rosetta-cli check:data --configuration-file rosetta-cli-conf/bitcoin_testnet.jsonrosetta-cli check:construction --configuration-file rosetta-cli-conf/bitcoin_testnet.jsonrosetta-cli check:data --configuration-file rosetta-cli-conf/bitcoin_mainnet.jsonrosetta-cli check:construction --configuration-file rosetta-cli-conf/bitcoin_mainnet.json
Future Work
- Publish benchamrks for sync speed, storage usage, and load testing
- Rosetta API
/mempool/transactionimplementation - Add CI test using
rosetta-clito run on each PR (likely on a regtest network) - Add performance mode to use unlimited RAM (implementation currently optimized to use <= 16 GB of RAM)
- Support Multi-Sig Sends
Please reach out on our community if you want to tackle anything on this list!
Development
make depsto install dependenciesmake testto run testsmake lintto lint the source codemake salusto check for security concernsmake build-localto build a Docker image from the local contextmake coverage-localto generate a coverage report
License
This project is available open source under the terms of the Apache 2.0 License.
© 2020 Coinbase