93 lines
3.0 KiB
Markdown
93 lines
3.0 KiB
Markdown
# blockbook
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## Install
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Setup go environment:
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```
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sudo apt-get install golang
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sudo apt-get install git
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go help gopath
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```
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Install RocksDB: https://github.com/facebook/rocksdb/blob/master/INSTALL.md
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```
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sudo apt-get install libgflags-dev libsnappy-dev zlib1g-dev libbz2-dev liblz4-dev libzstd-dev
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cd /path/to/rocksdb
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make static_lib
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```
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Install gorocksdb: https://github.com/tecbot/gorocksdb
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```
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CGO_CFLAGS="-I/path/to/rocksdb/include" \
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CGO_LDFLAGS="-L/path/to/rocksdb -lrocksdb -lstdc++ -lm -lz -lbz2 -lsnappy -llz4 -lzstd" \
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go get github.com/tecbot/gorocksdb
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```
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Install ZeroMQ: https://github.com/zeromq/libzmq
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Install Go interface to ZeroMQ:
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```
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go get github.com/pebbe/zmq4
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```
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Install blockbook:
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```
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go get github.com/jpochyla/blockbook
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```
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## Usage
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```
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$GOPATH/bin/blockbook --help
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```
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# Data storage in RocksDB
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Blockbook stores data the key-value store RocksDB.
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The data are separated to different column families:
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- **default**
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at the moment not used, will store statistical data etc.
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- **height** - maps *block height* to *block hash*
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*Block heigh* stored as binary array of 4 bytes (big endian uint32)
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*Block hash* stored as binary array of 32 bytes
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Example - the first four blocks (all data hex encoded)
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```
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0x00000000 : 0x000000000933EA01AD0EE984209779BAAEC3CED90FA3F408719526F8D77F4943
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0x00000001 : 0x00000000B873E79784647A6C82962C70D228557D24A747EA4D1B8BBE878E1206
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0x00000002 : 0x000000006C02C8EA6E4FF69651F7FCDE348FB9D557A06E6957B65552002A7820
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0x00000003 : 0x000000008B896E272758DA5297BCD98FDC6D97C9B765ECEC401E286DC1FDBE10
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```
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- **outputs** - maps *address+block height* to *array of outpoints*
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*Address+block height* stored as binary array 25 bytes total - 21 bytes address without checksum + 4 bytes (big endian uint32) block height
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*array of outpoints* stored as binary array of 32 bytes for transaction id + variable length outpoint index for each outpoint
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Example - (all data hex encoded)
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```
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0x6FCB8DBDD6F207F559162EF3BBD4229911DA248C3000000029 : 0xC459D961CC607A12AFDC6A8A200E84F1AD8E2021C2745FE12E0231DD90CA46BE00
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0x6FCF12C87234AF9C402246B1A5D5C3F937337E6ECC00000013 : 0x73A4988ADF462B6540CFA59097804174B298CFA439F73C1A072C2C6FBDBE57C700
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0x6FD3F80654BDA100BB704FBAF49E759E6084AB10DD0000005D : 0xC12A5ACAE3EFD788F088FCFA6D267ED48681A1AE4D2F477BFA60C0500274B6BE00
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0xC43E3D6ABE282D92A28CB791697BA001D733CEFDC7AF1BCF05 : 0x7246e79f97b5f82e7f51e291d533964028ec90be0634af8a8ef7d5a903c7f6d301
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```
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- **inputs** - maps *transaction outpoint* to *input transaction* that spends it
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*Transaction outpoint* stored as binary array of 32 bytes for transaction id + variable length outpoint index
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*Input transaction* stored as binary array of 32 bytes for transaction id + variable length input index
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Example - (all data hex encoded)
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```
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0x7246e79f97b5f82e7f51e291d533964028ec90be0634af8a8ef7d5a903c7f6d300 : 0x0a7aa90ea0269c79f844c516805e4cac594adb8830e56fca894b66aab19136a428
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0x7246e79f97b5f82e7f51e291d533964028ec90be0634af8a8ef7d5a903c7f6d301 : 0x4303a9fcfe6026b4d33ba488df6443c9a99bca7b7fcb7c6f6cd65cea24a749b700
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```
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