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219 lines
8.5 KiB
Markdown
219 lines
8.5 KiB
Markdown
# Onion Monero Blockchain Explorer
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Curently available Monero blockchain explorer websites have several limitations which are of special importance to privacy-oriented users:
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- they use JavaScript,
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- have images which might be used for [cookieless tracking](http://lucb1e.com/rp/cookielesscookies/),
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- track users activates through google analytics,
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- are closed sourced,
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- are not available as hidden services,
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- provide only basic search capabilities,
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- do not support Monero testnet
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In this example, these limitations are addressed by development of
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an Onion Monero Blockchain Explorer. The example not only shows how to use Monero C++ libraries, but also demonstrates how to use:
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- [crow](https://github.com/ipkn/crow) - C++ micro web framework
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- [lmdb++](https://github.com/bendiken/lmdbxx) - C++ wrapper for the LMDB
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- [mstch](https://github.com/no1msd/mstch) - C++ {{mustache}} templates
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- [json](https://github.com/nlohmann/json) - JSON for Modern C++
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- [date](https://github.com/HowardHinnant/date) - C++ date and time library
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- [fmt](https://github.com/fmtlib/fmt) - Small, safe and fast string formatting library
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## Address
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Clearnet versions:
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- [https://xmrchain.net/](https://xmrchain.net/) - https enabled, most up to date.
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- [https://monerohash.com/explorer/](https://monerohash.com/explorer/) - nice looking one, https enabled.
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- [http://explore.MoneroWorld.com](http://explore.moneroworld.com) - same as the first one.
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- [http://blox.supportxmr.com/](http://blox.supportxmr.com/)
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- [https://explorer.xmr.my/](https://explorer.xmr.my/)
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Clearnet testnet Monero version - https enabled:
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- [https://testnet.xmrchain.com/](https://testnet.xmrchain.com/)
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Tor users - down for now:
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- [http://3ccmeg4dunrl7h3i.onion/](http://3ccmeg4dunrl7h3i.onion/)
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i2p users (main Monero network) - down for now:
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- [http://monerotools.i2p](http://monerotools.i2p)
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## Onion Monero Blockchain Explorer features
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The key features of the Onion Monero Blockchain Explorer are:
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- no javascript, no cookies, no web analytics trackers, no images,
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- open sourced,
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- made fully in C++,
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- the only explorer showing encrypted payments ID,
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- the only explorer with the ability to search by encrypted payments ID, tx public
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and private keys, stealth addresses, input key images, block timestamps
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(UTC time, e.g., 2016-11-23 14:03:05)
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- the only explorer showing ring signatures,
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- the only explorer showing transaction extra field,
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- the only explorer showing public components of Monero addresses,
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- the only explorer that can show which outputs and mixins belong to the given Monero address and viewkey,
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- the only explorer that can be used to prove that you send Monero to someone,
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- the only explorer showing detailed information about mixins, such as, mixins'
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age, timescale, mixin of mixins,
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- the only explorer showing number of amount output indices,
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- the only explorer supporting Monero testnet network,
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- the only explorer providing tx checker and pusher for online pushing of transactions,
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- the only explorer allowing to inspect encrypted key images file and output files.
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## Prerequisite
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Instruction for Monero 0.10.1 compilation and Monero headers and libraries setup are
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as shown here:
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- [Compile Monero 0.9 on Ubuntu 16.04 x64](https://github.com/moneroexamples/compile-monero-09-on-ubuntu-16-04)
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- [lmdbcpp-monero](https://github.com/moneroexamples/lmdbcpp-monero.git) (optional)
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## Compile and run the explorer
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##### Monero headers and libraries setup
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The Onion Explorer uses Monero C++ libraries and headers.
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Instructions how to download source files and compile Monero,
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setup header and library files are presented here:
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- https://github.com/moneroexamples/compile-monero-09-on-ubuntu-16-04 (Ubuntu 16.04)
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- https://github.com/moneroexamples/compile-monero-09-on-arch-linux (Arch Linux)
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##### Custom lmdb database (optional)
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Most unique search abilities of the Onion Explorer are achieved through using
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a [custom lmdb database](https://github.com/moneroexamples/lmdbcpp-monero.git) constructed based on the Monero blockchain.
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The reason for the custom database is that Monero's own lmdb database has limited
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search abilities. For example, its not possible to search for a tx having a
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given key image, except by performing an exhaustive search on the blockchain which is very time consuming.
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Instruction how to compile the `lmdbcpp-monero` are provided here:
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- https://github.com/moneroexamples/lmdbcpp-monero.git
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The custom database is rather big, 12GB now, and it must be running alongside Monero deamon
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so that it keeps updating itself with new information from new blocks as they are added
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to the blockchain. Also, by default it is 10 blocks behind the current blockchain height
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to minimize indexing/saving orphaned blocks.
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For these reasons, its use is optional. However, without it, some searches wont be possible,
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e.g., searching for key images, output and tx public keys, encrypted payments id.
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##### Compile and run the explorer
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Once the Monero is compiled and setup, the explorer can be downloaded and compiled
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as follows:
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```bash
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# download the source code
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git clone https://github.com/moneroexamples/onion-monero-blockchain-explorer.git
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# enter the downloaded sourced code folder
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cd onion-monero-blockchain-explorer
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# make a build folder and enter it
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mkdir build && cd build
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# create the makefile
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cmake ..
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# compile
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make
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```
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When compilation finishes executable `xmrblocks` should be created.
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To run it:
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```
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./xmrblocks
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```
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Example output:
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```bash
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[mwo@arch onion-monero-blockchain-explorer]$ ./xmrblocks
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2016-May-28 10:04:49.160280 Blockchain initialized. last block: 1056761, d0.h0.m12.s47 time ago, current difficulty: 1517857750
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(2016-05-28 02:04:49) [INFO ] Crow/0.1 server is running, local port 8081
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```
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Go to your browser: http://127.0.0.1:8081
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## The explorer's command line options
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```
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./xmrblocks -h
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xmrblocks, start Onion Monero Blockchain Explorer:
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-h [ --help ] [=arg(=1)] (=0) produce help message
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-t [ --testnet ] [=arg(=1)] (=0) use testnet blockchain
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--enable-pusher [=arg(=1)] (=0) enable pushing signed tx
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-p [ --port ] arg (=8081) default port
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-b [ --bc-path ] arg path to lmdb blockchain
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--ssl-crt-file arg A path to crt file for ssl (https)
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functionality
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--ssl-key-file arg A path to key file for ssl (https)
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functionality
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-c [ --custom-db-path ] arg path to the custom lmdb database used
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for searching things
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-d [ --deamon-url ] arg (=http:://127.0.0.1:18081)
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monero address string
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```
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## Enable SSL (https)
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By default, the explorer does not use ssl. But it has such a functionality.
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As an example, you can generate your own ssl certificates as follows:
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```bash
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cd /tmp # example folder
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openssl genrsa -out server.key 1024
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openssl req -new -key server.key -out server.csr
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openssl x509 -req -days 3650 -in server.csr -signkey server.key -out server.crt
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```
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Having the `crt` and `key` files, run `xmrblocks` in the following way:
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```bash
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./xmrblocks --ssl-crt-file=/tmp/server.crt --ssl-key-file=/tmp/server.key
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```
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Note: Because we generated our own certificate, modern browsers will complain
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about it as they cant verify the signatures against any third party. So probably
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for any practical use need to have properly issued ssl certificates.
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## Enable transaction pusher
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By default, the tx pusher is disabled. The pushing will not work, but tx checking and inspecting will.
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To enable pushing the txs, use flag `--enable-pusher`, e.g.:
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```bash
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./xmrblocks --enable-pusher
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```
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Note: There has been a number of issues with compatibility of tx's binary data between different Monero versions
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and operating systems. Unless you are using latest development version of Monero and the explorer has been compiled
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against the lastest version, pushing and checking unsigined and signed tx data
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might not work due to incompatibilities in binary data.
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## Example screenshot
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## Other monero examples
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Other examples can be found on [github](https://github.com/moneroexamples?tab=repositories).
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Please know that some of the examples/repositories are not
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finished and may not work as intended.
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## How can you help?
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Constructive criticism, code and website edits are always good. They can be made through github.
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