Graft Blockchain Explorer
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README.md

Graft Blockchain Explorer features

The key features of the Graft Blockchain Explorer are:

  • no javascript, no cookies, no web analytics trackers, no images,
  • open sourced,
  • made fully in C++,
  • showing encrypted payments ID,
  • showing ring signatures,
  • showing transaction extra field,
  • showing public components of Graft addresses,
  • decoding which outputs and mixins belong to the given Graft address and viewkey,
  • can prove that you send Graft to someone,
  • detailed information about mixins, such as, mixins' age, timescale, mixin of mixins,
  • showing number of amount output indices,
  • support Graft testnet network,
  • tx checker and pusher for online pushing of transactions,
  • estimate possible spendings based on address and viewkey,
  • can provide total amount of all miner fees.
  • decoding encrypted payment id.

Compilation on Ubuntu 16.04

Compile latest Graft release

Download and compile recent Graft into your home folder:

# first install graft dependecines
sudo apt update

sudo apt install git build-essential cmake libboost-all-dev miniupnpc libunbound-dev graphviz doxygen libunwind8-dev pkg-config libssl-dev libcurl4-openssl-dev libgtest-dev libreadline-dev libzmq3-dev

# go to home folder 
cd ~

git clone https://github.com/graft-project/GraftNetwork

cd GraftNetwork/

make
Compile and run the explorer

Once the Graft is compiles, the explorer can be downloaded and compiled as follows:

# go to home folder if still in ~/GraftNetwork
cd ~

# download the source code
git clone https://github.com/graft-project/graft-blockchain-explorer.git

# enter the downloaded sourced code folder
cd graft-blockchain-explorer

# make a build folder and enter it
mkdir build && cd build

# create the makefile
cmake ..

# altearnatively can use: cmake -DMONERO_DIR=/path/to/graft_folder .. 
# if graft is not in ~/GraftNetwork

# compile
make

When compilation finishes executable grfblocks should be created. Before running please make sure that ~/Downloads folder exists and is writable. Time zone library that explorer is using, puts there its database of time zone offsets

To run it:

./grfblocks

By default it will look for blockchain in its default location i.e., ~/.graft/lmdb. You can use --bc-path option if its in different location. Example output:

TODO

Go to your browser: http://127.0.0.1:8081

The explorer's command line options

grfblocks, Graft Blockchain Explorer:
  -h [ --help ] [=arg(=1)] (=0)         produce help message
  -t [ --testnet ] [=arg(=1)] (=0)      use testnet blockchain
  --enable-pusher [=arg(=1)] (=0)       enable signed transaction pusher
  --enable-mixin-details [=arg(=1)] (=0)
                                        enable mixin details for key images, 
                                        e.g., timescale, mixin of mixins, in tx
                                        context
  --enable-key-image-checker [=arg(=1)] (=0)
                                        enable key images file checker
  --enable-output-key-checker [=arg(=1)] (=0)
                                        enable outputs key file checker
  --enable-json-api arg (=1)            enable JSON REST api
  --enable-tx-cache [=arg(=1)] (=0)     enable caching of transaction details
  --show-cache-times [=arg(=1)] (=0)    show times of getting data from cache 
                                        vs no cache
  --enable-block-cache [=arg(=1)] (=0)  enable caching of block details
  --enable-autorefresh-option [=arg(=1)] (=0)
                                        enable users to have the index page on 
                                        autorefresh
  --enable-emission-monitor [=arg(=1)] (=0)
                                        enable Graft total emission monitoring
                                        thread
  -p [ --port ] arg (=8081)             default explorer port
  --testnet-url arg                     you can specify testnet url, if you run
                                        it on mainnet. link will show on front 
                                        page to testnet explorer
  --mainnet-url arg                     you can specify mainnet url, if you run
                                        it on testnet. link will show on front 
                                        page to mainnet explorer
  --no-blocks-on-index arg (=10)        number of last blocks to be shown on 
                                        index page
  --mempool-info-timeout arg (=5000)    maximum time, in milliseconds, to wait 
                                        for mempool data for the front page
  --mempool-refresh-time arg (=5)       time, in seconds, for each refresh of 
                                        mempool state
  -b [ --bc-path ] arg                  path to lmdb folder of the blockchain, 
                                        e.g., ~/.graft/lmdb
  --ssl-crt-file arg                    path to crt file for ssl (https) 
                                        functionality
  --ssl-key-file arg                    path to key file for ssl (https) 
                                        functionality
  -d [ --deamon-url ] arg (=http:://127.0.0.1:18081)
                                        Graft deamon url

Example usage, defined as bash aliases.

# for testnet explorer
alias grfblocksmainnet='~/graft-blockchain-explorer/build/grfblocks  --port 8081 --testnet-url "http://18.231.10.64:8081" --enable-pusher --enable-emission-monitor'

# for mainnet explorer
TODO

Enable Graft emission

Obtaining current Graft emission amount is not straight forward. Thus, by default it is disabled. To enable it use --enable-emission-monitor flag, e.g.,

grfblocks --enable-emission-monitor 

This flag will enable emission monitoring thread. When started, the thread will initially scan the entire blockchain, and calculate the cumulative emission based on each block. Since it is a separate thread, the explorer will work as usual during this time. Every 10000 blocks, the thread will save current emission in a file, by default, in ~/.graft/lmdb/emission_amount.txt. For testnet network, it is ~/.graft/testnet/lmdb/emission_amount.txt. This file is used so that we don't need to rescan entire blockchain whenever the explorer is restarted. When the explorer restarts, the thread will first check if ~/.graft/lmdb/emission_amount.txt is present, read its values, and continue from there if possible. Subsequently, only the initial use of the tread is time consuming. Once the thread scans the entire blockchain, it updates the emission amount using new blocks as they come. Since the explorer writes this file, there can be only one instance of it running for mainnet and testnet. Thus, for example, you cant have two explorers for mainnet running at the same time, as they will be trying to write and read the same file at the same time, leading to unexpected results. Off course having one instance for mainnet and one instance for testnet is fine, as they write to different files.

When the emission monitor is enabled, information about current emission of coinbase and fees is displayed on the front page, e.g., :

Graft emission (fees) is 14485540.430 (52545.373) as of 1313448 block

The values given, can be checked using Graft daemon's print_coinbase_tx_sum command. For example, for the above example: print_coinbase_tx_sum 0 1313449.

To disable the monitor, simply restart the explorer without --enable-emission-monitor flag.

Enable SSL (https)

By default, the explorer does not use ssl. But it has such a functionality.

As an example, you can generate your own ssl certificates as follows:

cd /tmp # example folder
openssl genrsa -out server.key 1024
openssl req -new -key server.key -out server.csr
openssl x509 -req -days 3650 -in server.csr -signkey server.key -out server.crt

Having the crt and key files, run grfblocks in the following way:

./grfblocks --ssl-crt-file=/tmp/server.crt --ssl-key-file=/tmp/server.key 

Note: Because we generated our own certificate, modern browsers will complain about it as they cant verify the signatures against any third party. So probably for any practical use need to have properly issued ssl certificates.

JSON API

The explorer has JSON api. For the API, it uses conventions defined by JSend.

api/transaction/<tx_hash>

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/transaction/6093260dbe79fd6277694d14789dc8718f1bd54457df8bab338c2efa3bb0f03d"

Partial results shown:

{
  "data": {
    "block_height": 1268252,
    "coinbase": false,
    "confirmations": 1,
    "current_height": 1268253,
    "extra": "01be23e277aed6b5f41f66b05244bf994c13108347366ec678ae16657f0fc3a22b",
    "inputs": [
      {
        "amount": 0,
        "key_image": "67838fd0ffd79f13e735830d3ec60412aed59e53e1f997feb6f73d088b949611",
        "mixins": [
          {
            "block_no": 1238623,
            "public_key": "0a5b853c55303c10e1326acfb085b9e246e088b1ccac7e37f7a810d46a28a914"
          },
          {
            "block_no": 1246942,
            "public_key": "527cf86f5abbfb006c970f7c6eb40493786d4751306f8985c6a43f98a88c0dff"
          }
        ]
      }
    ],
    "mixin": 9,
    "outputs": [
      {
        "amount": 0,
        "public_key": "525779873776e4a42f517fd79b72e7c31c3ba03e730fc32287f6414fb702c1d7"
      },
      {
        "amount": 0,
        "public_key": "e25f00fceb77af841d780b68647618812695b4ca6ebe338faba6e077f758ac30"
      }
    ],
    "payment_id": "",
    "payment_id8": "",
    "rct_type": 1,
    "timestamp": 1489753456,
    "timestamp_utc": "2017-03-17 12:24:16",
    "tx_fee": 12517785574,
    "tx_hash": "6093260dbe79fd6277694d14789dc8718f1bd54457df8bab338c2efa3bb0f03d",
    "tx_size": 13323,
    "tx_version": 2,
    "xmr_inputs": 0,
    "xmr_outputs": 0
  },
  "status": "success"
}

api/transactions

Transactions in last 25 blocks

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/transactions"

Partial results shown:

{
  "data": {
    "blocks": [
      {
        "age": "33:16:49:53",
        "height": 1268252,
        "size": 105390000000000000,
        "timestamp": 1489753456,
        "timestamp_utc": "2017-03-17 12:24:16",
        "txs": [
          {
            "coinbase": true,
            "mixin": 0,
            "outputs": 8491554678365,
            "rct_type": 0,
            "tx_fee": 0,
            "tx_hash": "7c4286f64544568265bb5418df84ae69afaa3567749210e46f8340c247f4803f",
            "tx_size": 151000000000000,
            "tx_version": 2
          },
          {
            "coinbase": false,
            "mixin": 5,
            "outputs": 0,
            "rct_type": 2,
            "tx_fee": 17882516700,
            "tx_hash": "2bfbccb918ee5f050808dd040ce03943b7315b81788e9cdee59cf86b557ba48c",
            "tx_size": 19586000000000000,
            "tx_version": 2
          }
        ]
      }
    ],
    "limit": 25,
    "page": 0
  },
  "status": "success"
}

api/transactions?page=<page_no>&limit=<tx_per_page>

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/transactions?page=2&limit=10"

Result analogical to the one above.

api/block/<block_number|block_hash>

curl  -w "\n" -X GET "http://139.162.32.245:8081/api/block/1293257"

Partial results shown:

{
  "data": {
    "block_height": 1293257,
    "block_reward": 0,
    "current_height": 1293264,
    "hash": "9ef6bb8f9b8bd253fc6390e5c2cdc45c8ee99fad16447437108bf301fe6bd6e1",
    "size": 141244,
    "timestamp": 1492761974,
    "timestamp_utc": "2017-04-21 08:06:14",
    "txs": [
      {
        "coinbase": true,
        "extra": "018ae9560eb85d5ebd22d3beaed55c21d469eab430c5e3cac61b3fe2f5ad156770020800000001a9030800",
        "mixin": 0,
        "payment_id": "",
        "payment_id8": "",
        "rct_type": 0,
        "tx_fee": 0,
        "tx_hash": "3ff71b65bec34c9261e01a856e6a03594cf0472acf6b77db3f17ebd18eaa30bf",
        "tx_size": 95,
        "tx_version": 2,
        "xmr_inputs": 0,
        "xmr_outputs": 8025365394426
      }
    ]
  },
  "status": "success"
}

api/mempool

Return all txs in the mempool.

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/mempool"

Partial results shown:

{
  "data": {
    "limit": 100000000,
    "page": 0,
    "total_page_no": 0,
    "txs": [
      {
        "coinbase": false,
        "extra": "022100325f677d96f94155a4840a84d8e0c905f7a4697a25744633bcb438feb1e51fb2012eda81bf552c53c2168f4130dbe0265c3a7898f3a7eee7c1fed955a778167b5d",
        "mixin": 3,
        "payment_id": "325f677d96f94155a4840a84d8e0c905f7a4697a25744633bcb438feb1e51fb2",
        "payment_id8": "",
        "rct_type": 2,
        "timestamp": 1494470894,
        "timestamp_utc": "2017-05-11 02:48:14",
        "tx_fee": 15894840000,
        "tx_hash": "9f3374f8ac67febaab153eab297937a3d0d2c706601e496bf5028146da0c9aef",
        "tx_size": 13291,
        "tx_version": 2,
        "xmr_inputs": 0,
        "xmr_outputs": 0
      }
    ],
    "txs_no": 7
  },
  "status": "success"
}

Limit of 100000000 is just default value above to ensure that all mempool txs are fetched if no specific limit given.

api/mempool?limit=<no_of_top_txs>

Return number of newest mempool txs, e.g., only 10.

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/mempool?limit=10"

Result analogical to the one above.

api/search/<block_number|tx_hash|block_hash>

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/search/1293669"

Partial results shown:

{
  "data": {
    "block_height": 1293669,
    "current_height": 1293670,
    "hash": "5d55b8fabf85b0b4c959d66ad509eb92ddfe5c2b0e84e1760abcb090195c1913",
    "size": 118026,
    "timestamp": 1492815321,
    "timestamp_utc": "2017-04-21 22:55:21",
    "title": "block",
    "txs": [
      {
        "coinbase": true,
        "extra": "01cb7fda09033a5fa06dc601b9295ef3790397cf3c645e958e34cf7ab699d2f5230208000000027f030200",
        "mixin": 0,
        "payment_id": "",
        "payment_id8": "",
        "rct_type": 0,
        "tx_fee": 0,
        "tx_hash": "479ba432f5c88736b438dd4446a11a13046a752d469f7828151f5c5b86be4e9a",
        "tx_size": 95,
        "tx_version": 2,
        "xmr_inputs": 0,
        "xmr_outputs": 7992697599717
      }
    ]
  },
  "status": "success"
}

api/outputs?txhash=<tx_hash>&address=&viewkey=&txprove=<0|1>

For txprove=0 we check which outputs belong to given address and corresponding viewkey. For txprove=1 we use to prove to the recipient that we sent them founds. For this, we use recipient's address and our tx private key as a viewkey value, i.e., viewkey=<tx_private_key>

Checking outputs:

# TODO: real outputs from graft testnet
curl  -w "\n" -X GET "http://127.0.0.1:8081/api/outputs?txhash=17049bc5f2d9fbca1ce8dae443bbbbed2fc02f1ee003ffdd0571996905faa831&address=44AFFq5kSiGBoZ4NMDwYtN18obc8AemS33DBLWs3H7otXft3XjrpDtQGv7SqSsaBYBb98uNbr2VBBEt7f2wfn3RVGQBEP3A&viewkey=f359631075708155cc3d92a32b75a7d02a5dcf27756707b47a2b31b21c389501&txprove=0"
{
  "data": {
    "address": "42f18fc61586554095b0799b5c4b6f00cdeb26a93b20540d366932c6001617b75db35109fbba7d5f275fef4b9c49e0cc1c84b219ec6ff652fda54f89f7f63c88",
    "outputs": [
      {
        "amount": 34980000000000,
        "match": true,
        "output_idx": 0,
        "output_pubkey": "35d7200229e725c2bce0da3a2f20ef0720d242ecf88bfcb71eff2025c2501fdb"
      },
      {
        "amount": 0,
        "match": false,
        "output_idx": 1,
        "output_pubkey": "44efccab9f9b42e83c12da7988785d6c4eb3ec6e7aa2ae1234e2f0f7cb9ed6dd"
      }
    ],
    "tx_hash": "17049bc5f2d9fbca1ce8dae443bbbbed2fc02f1ee003ffdd0571996905faa831",
    "tx_prove": false,
    "viewkey": "f359631075708155cc3d92a32b75a7d02a5dcf27756707b47a2b31b21c389501"
  },
  "status": "success"
}

Proving transfer:

We use recipient's address (i.e. not our address from which we sent xmr to recipient). For the viewkey, we use tx_private_key (although the GET variable is still called viewkey) that we obtained by sending this txs.

# this is for testnet transaction 
curl  -w "\n" -X GET "http://127.0.0.1:8082/api/outputs?txhash=94782a8c0aa8d8768afa0c040ef0544b63eb5148ca971a024ac402cad313d3b3&address=9wUf8UcPUtb2huK7RphBw5PFCyKosKxqtGxbcKBDnzTCPrdNfJjLjtuht87zhTgsffCB21qmjxjj18Pw7cBnRctcKHrUB7N&viewkey=e94b5bfc599d2f741d6f07e3ab2a83f915e96fb374dfb2cd3dbe730e34ecb40b&txprove=1"
{
  "data": {
    "address": "71bef5945b70bc0a31dbbe6cd0bd5884fe694bbfd18fff5f68f709438554fb88a51b1291e378e2f46a0155108782c242cc1be78af229242c36d4f4d1c4f72da2",
    "outputs": [
      {
        "amount": 1000000000000,
        "match": true,
        "output_idx": 0,
        "output_pubkey": "c1bf4dd020b5f0ab70bd672d2f9e800ea7b8ab108b080825c1d6cfc0b7f7ee00"
      },
      {
        "amount": 0,
        "match": false,
        "output_idx": 1,
        "output_pubkey": "8c61fae6ada2a103565dfdd307c7145b2479ddb1dab1eaadfa6c34db65d189d5"
      }
    ],
    "tx_hash": "94782a8c0aa8d8768afa0c040ef0544b63eb5148ca971a024ac402cad313d3b3",
    "tx_prove": true,
    "viewkey": "e94b5bfc599d2f741d6f07e3ab2a83f915e96fb374dfb2cd3dbe730e34ecb40b"
  },
  "status": "success"
}

Result analogical to the one above.

api/networkinfo

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/networkinfo"
{
  "data": {
    "alt_blocks_count": 0,
    "block_size_limit": 600000,
    "cumulative_difficulty": 2091549555696348,
    "difficulty": 7941560081,
    "fee_per_kb": 303970000,
    "grey_peerlist_size": 4991,
    "hash_rate": 66179667,
    "height": 1310423,
    "incoming_connections_count": 0,
    "outgoing_connections_count": 5,
    "start_time": 1494822692,
    "status": "OK",
    "target": 120,
    "target_height": 0,
    "testnet": false,
    "top_block_hash": "76f9e85d62415312758bc09e0b9b48fd2b005231ad1eee435a8081e551203f82",
    "tx_count": 1219048,
    "tx_pool_size": 2,
    "white_peerlist_size": 1000
  },
  "status": "success"
}

api/outputsblocks

Search for our outputs in last few blocks (up to 5 blocks), using provided address and viewkey.

# testnet address
curl  -w "\n" -X GET http://127.0.0.1:8081/api/outputsblocks?address=9sDyNU82ih1gdhDgrqHbEcfSDFASjFgxL9B9v5f1AytFUrYsVEj7bD9Pyx5Sw2qLk8HgGdFM8qj5DNecqGhm24Ce6QwEGDi&viewkey=807079280293998634d66e745562edaaca45c0a75c8290603578b54e9397e90a&limit=5&mempool=1

Example result:

{
{
  "data": {
    "address": "0182d5be0f708cecf2b6f9889738bde5c930fad846d5b530e021afd1ae7e24a687ad50af3a5d38896655669079ad0163b4a369f6c852cc816dace5fc7792b72f",
    "height": 960526,
    "limit": "5",
    "mempool": true,
    "outputs": [
      {
        "amount": 33000000000000,
        "block_no": 0,
        "in_mempool": true,
        "output_idx": 1,
        "output_pubkey": "2417b24fc99b2cbd9459278b532b37f15eab6b09bbfc44f9d17e15cd25d5b44f",
        "payment_id": "",
        "tx_hash": "9233708004c51d15f44e86ac1a3b99582ed2bede4aaac6e2dd71424a9147b06f"
      },
      {
        "amount": 2000000000000,
        "block_no": 960525,
        "in_mempool": false,
        "output_idx": 0,
        "output_pubkey": "9984101f5471dda461f091962f1f970b122d4469077aed6b978a910dc3ed4576",
        "payment_id": "0000000000000055",
        "tx_hash": "37825d0feb2e96cd10fa9ec0b990ac2e97d2648c0f23e4f7d68d2298996acefd"
      },
      {
        "amount": 96947454120000,
        "block_no": 960525,
        "in_mempool": false,
        "output_idx": 1,
        "output_pubkey": "e4bded8e2a9ec4d41682a34d0a37596ec62742b28e74b897fcc00a47fcaa8629",
        "payment_id": "0000000000000000000000000000000000000000000000000000000000001234",
        "tx_hash": "4fad5f2bdb6dbd7efc2ce7efa3dd20edbd2a91640ce35e54c6887f0ee5a1a679"
      }
    ],
    "viewkey": "807079280293998634d66e745562edaaca45c0a75c8290603578b54e9397e90a"
  },
  "status": "success"
}

api/emission

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/emission"
{
  "data": {
    "blk_no": 1313969,
    "coinbase": 14489473877253413000,
    "fee": 52601974988641130
  },
  "status": "success"
}

Emission only works when the emission monitoring thread is enabled.

api/version

curl  -w "\n" -X GET "http://127.0.0.1:8081/api/version"
{
  "data": {
    "api": 65536, 
    "blockchain_height": 1357031,
    "git_branch_name": "use-real-branch-name-here",
    "last_git_commit_date": "2017-07-25",
    "last_git_commit_hash": "a549f25",
    "graft_version_full": "0.10.3.1-ab594cfe"
  },
  "status": "success"
}

api number is store as uint32_t. In this case 65536 represents major version 1 and minor version 0. In JavaScript to get these numbers, one can do as follows:

var api_major = response.data.api >> 16;
var api_minor = response.data.api & 0xffff;

api/rawblock/<block_number|block_hash>

Return raw json block data, as represented in Monero.

curl  -w "\n" -X GET "http://139.162.32.245:8081/api/rawblock/1293257"

Example result not shown.

api/rawtransaction/<tx_hash>

Return raw json tx data, as represented in Monero.

curl  -w "\n" -X GET "http://139.162.32.245:8081/api/rawtransaction/6093260dbe79fd6277694d14789dc8718f1bd54457df8bab338c2efa3bb0f03d"

Example result not shown.