README

Insight-api

A Gewel blockchain REST and WebSocket API Service

This is a backend-only service. If you're looking for the web frontend application, take a look at https://github.com/gewelio/insight-ui.

Table of Content

Getting Started
- Prerequisites
- Query Rate Limit
API HTTP Endpoints
Web Socket Api
- Example Usage
Notes on Upgrading from v0.3
Notes on Upgrading from v0.2
Resources
License

Getting Started

npm install -g @gewelio/gewelcore-node@latest
gewelcore-node create mynode
cd mynode
gewelcore-node install @gewelio/insight-api
gewelcore-node start

The API endpoints will be available by default at: http://localhost:3001/insight-api/

Prerequisites

Gewelcore Node

Note: You can use an existing Gewel data directory, however txindex, addressindex, timestampindex and spentindex needs to be set to true in gewel.conf, as well as a few other additional fields.

Query Rate Limit

To protect the server, insight-api has a built it query rate limiter. It can be configurable in gewelcore-node.json with:

  "servicesConfig": {
    "insight-api": {
      "rateLimiterOptions": {
        "whitelist": ["::ffff:127.0.0.1"]
      }
    }
  }

With all the configuration options available: https://github.com/gewelio/insight-api/blob/master/lib/ratelimiter.js#L10-17

Or disabled entirely with:

  "servicesConfig": {
    "insight-api": {
      "disableRateLimiter": true
    }
  }

API HTTP Endpoints

Block

  /api/block/[:hash]
  /api/block/0000000006e7b38e8ab2d351239019c01de9a148b5baef58cfe52dfd9917cedc

Block Index

Get block hash by height

  /api/block-index/[:height]
  /api/block-index/0

This would return:

{
  "blockHash":"00000bafbc94add76cb75e2ec92894837288a481e5c005f6563d91623bf8bc2c"
}

which is the hash of the TestNet Genesis block (0 height)

Raw Block

  /api/rawblock/[:blockHash]

This would return:

{
  "rawblock":"blockhexstring..."
}

Block Summaries

Get block summaries by date:

  /api/blocks?limit=3&blockDate=2017-04-22

Example response:

{
  "blocks": [
    {
      "height": 188928,
      "size": 312,
      "hash": "00000000ee9a976cf459240c2add1147137ca6126b7906fa13ce3d80b5cadcc7",
      "time": 1492905418,
      "txlength": 1,
      "poolInfo": {
        "poolName": "Gewel Pool",
        "url": "https://pool.gewel.com/"
      }
    },{...},{...}
  ],
  "length": 3,
  "pagination": {
    "next":"2017-04-23",
    "prev":"2017-04-21",
    "currentTs":1492905599,
    "current":"2017-04-22",
    "isToday":false,
    "more":true,
    "moreTs":1492905600
  }
}

Transaction

  /api/tx/[:txid]
  /api/tx/ebdca263fe1c75c8609ce8fe3d82a320a0b3ca840f4df995883f5dab1b9ff8d9
  /api/rawtx/[:rawid]
  /api/rawtx/ebdca263fe1c75c8609ce8fe3d82a320a0b3ca840f4df995883f5dab1b9ff8d9

Address

  /api/addr/[:addr][?noTxList=1][&from=&to=]
  /api/addr/ybi3gej7Ea1MysEYLR7UMs3rMuLJH5aVsW?noTxList=1
  /api/addr/yPv7h2i8v3dJjfSH4L3x91JSJszjdbsJJA?from=1000&to=2000

Address Properties

  /api/addr/[:addr]/balance
  /api/addr/[:addr]/totalReceived
  /api/addr/[:addr]/totalSent
  /api/addr/[:addr]/unconfirmedBalance

The response contains the value in Satoshis.

Unspent Outputs

  /api/addr/[:addr]/utxo

Sample return:

[
  {
    "address":"ygwNQgE5f15Ygopbs2KPRYMS4TcffqBpsz",
    "txid":"05d70bc1c4cf1c3afefc3250480d733b5666b19cb1f629901ded82cb2d6263d1",
    "vout":0,
    "scriptPubKey":"76a914e22dc8acf5bb5624f4beef22fb2238f8479e183f88ac",
    "amount":0.01194595,
    "satoshis":1194595,
    "height":142204,
    "confirmations":124317
  },{...}
]

Unspent Outputs for Multiple Addresses

GET method:

  /api/addrs/[:addrs]/utxo
  /api/addrs/ygwNQgE5f15Ygopbs2KPRYMS4TcffqBpsz,ygw5yCtVkx3hREke4L8qDqQtnNoAiPKTSx/utxo

POST method:

  /api/addrs/utxo

POST params:

addrs: ygwNQgE5f15Ygopbs2KPRYMS4TcffqBpsz,ygw5yCtVkx3hREke4L8qDqQtnNoAiPKTSx

InstantSend Transactions

If a Transaction Lock has been observed by Insight API a 'txlock' value of true will be included in the Transaction Object.

Sample output:

{
    "txid": "b7ef92d1dce458276f1189e06bf532eff78f9c504101d3d4c0dfdcd9ebbf3879",
    "version": 1,
    "locktime": 133366,
    "vin": [{ ... }],
    "vout": [{ ... }],
    "blockhash": "0000001ab9a138339fe4505a299525ace8cda3b9bcb258a2e5d93ed7a320bf21",
    "blockheight": 133367,
    "confirmations": 37,
    "time": 1483985187,
    "blocktime": 1483985187,
    "valueOut": 8.998,
    "size": 226,
    "valueIn": 8.999,
    "fees": 0.001,
    "txlock": true
}

Transactions by Block

  /api/txs/?block=HASH
  /api/txs/?block=000000000814dd7cf470bd835334ea6624ebf0291ea857a5ab37c65592726375

Transactions by Address

  /api/txs/?address=ADDR
  /api/txs/?address=yWFfdp9nLUjy1kJczFhRuBMUjtTkTTiyMv

Transactions for Multiple Addresses

GET method:

  /api/addrs/[:addrs]/txs[?from=&to=]
  /api/addrs/ygwNQgE5f15Ygopbs2KPRYMS4TcffqBpsz,ygw5yCtVkx3hREke4L8qDqQtnNoAiPKTSx/txs?from=0&to=20

POST method:

  /api/addrs/txs

POST params:

addrs: ygwNQgE5f15Ygopbs2KPRYMS4TcffqBpsz,ygw5yCtVkx3hREke4L8qDqQtnNoAiPKTSx
from (optional): 0
to (optional): 20
noAsm (optional): 1 (will omit script asm from results)
noScriptSig (optional): 1 (will omit the scriptSig from all inputs)
noSpent (option): 1 (will omit spent information per output)

Sample output:

{ totalItems: 100,
  from: 0,
  to: 20,
  items:
    [ { txid: '3e81723d069b12983b2ef694c9782d32fca26cc978de744acbc32c3d3496e915',
       version: 1,
       locktime: 0,
       vin: [Object],
       vout: [Object],
       blockhash: '00000000011a135e5277f5493c52c66829792392632b8b65429cf07ad3c47a6c',
       confirmations: 109367,
       time: 1393659685,
       blocktime: 1393659685,
       valueOut: 0.3453,
       size: 225,
       firstSeenTs: undefined,
       valueIn: 0.3454,
       fees: 0.0001,
       txlock: false },
      { ... },
      { ... },
      ...
      { ... }
    ]
 }

Note: if pagination params are not specified, the result is an array of transactions.

Transaction Broadcasting

Standard transaction

POST method:

  /api/tx/send

POST params:

  rawtx: "signed transaction as hex string"

  eg

  rawtx: 01000000017b1eabe0209b1fe794124575ef807057c77ada2138ae4fa8d6c4de0398a14f3f00000000494830450221008949f0cb400094ad2b5eb399d59d01c14d73d8fe6e96df1a7150deb388ab8935022079656090d7f6bac4c9a94e0aad311a4268e082a725f8aeae0573fb12ff866a5f01ffffffff01f0ca052a010000001976a914cbc20a7664f2f69e5355aa427045bc15e7c6c77288ac00000000

POST response:

  {
      txid: [:txid]
  }

  eg

  {
      txid: "c7736a0a0046d5a8cc61c8c3c2821d4d7517f5de2bc66a966011aaa79965ffba"
  }

InstantSend transaction

Conditions :

Every inputs should have 6 confirmations.
Fee are 0.001 per input.
Transaction value should be below SPORK_5_INSTANTSEND_MAX_VALUE (see spork route)

POST method:

  /api/tx/sendix

POST params:

  rawtx: "signed transaction as hex string"

POST response:

  {
      txid: [:txid]
  }

Sporks List

GET method:

  /api/sporks

Sample output:

{"sporks":
    {
        "SPORK_2_INSTANTSEND_ENABLED":0,
        "SPORK_3_INSTANTSEND_BLOCK_FILTERING":0,
        "SPORK_5_INSTANTSEND_MAX_VALUE":2000,
        "SPORK_8_MASTERNODE_PAYMENT_ENFORCEMENT":0,
        "SPORK_9_SUPERBLOCKS_ENABLED":0,
        "SPORK_10_MASTERNODE_PAY_UPDATED_NODES":0,
        "SPORK_12_RECONSIDER_BLOCKS":0,
        "SPORK_13_OLD_SUPERBLOCK_FLAG":4070908800,
        "SPORK_14_REQUIRE_SENTINEL_FLAG":4070908800
    }
}

Proposals Informations

GET method:

  /api/gobject/info

Sample output:

{
  "result":{
    "governanceminquorum":1,
    "masternodewatchdogmaxseconds":7200,
    "proposalfee":5,
    "superblockcycle":24,
    "lastsuperblock":79800,
    "nextsuperblock":79824,
    "maxgovobjdatasize":16384
  },
  "error":null,
  "id":68537
}

Proposals Count

GET method:

  /api/gobject/count

Sample output:

{
  "result":"Governance Objects: 47 (Proposals: 7, Triggers: 40, Watchdogs: 0/0, Other: 0; Erased: 0), Votes: 1883",
  "error":null,
  "id":47025
}

Budget Proposal List

GET method:

  /api/gobject/list/proposal (or /api/gobject/list)

Sample output:

    [ { Hash: 'b6af3e70c686f660541a77bc035df2e5e46841020699ce3ec8fad786f7d1aa35',
        DataObject: {
          end_epoch: 1513555200,
          name: 'flare03',
          payment_address: 'yViyoK3NwfH5GXRo7e4DEYkzzhBjDNQaQG',
          payment_amount: 5,
          start_epoch: 1482105600,
          type: 1,
          url: 'https://www.gewel.io'
        },
        AbsoluteYesCount: 40,
        YesCount: 40,
        NoCount: 0,
        AbstainCount: 0 } ]

Budget Triggers List

GET method:

  /api/gobject/list/trigger

Sample output:

[
  {
    "Hash":"fa2a7505c52438b2ca3d14def1c2cdcb59d7ccca417920182f04fcb9be968f00",
    "DataObject":{"type":2},
    "AbsoluteYesCount":53,
    "YesCount":53,
    "NoCount":0,
    "AbstainCount":0
  }
]

Budget Proposal Detail

GET method:

  /api/gobject/get/[:hash]
  /api/gobject/get/b6af3e70c686f660541a77bc035df2e5e46841020699ce3ec8fad786f7d1aa35

Sample output:

    [ { Hash: 'b6af3e70c686f660541a77bc035df2e5e46841020699ce3ec8fad786f7d1aa35',
        CollateralHash: '24a71d8f221659717560365d2914bc7a00f82ffb8f8c68e7fffce5f35aa23b90',
        DataHex: '5b5b2270726f706f73616c222c7b22656e645f65706f6368223a313531333535353230302c226e616d65223a22666c6172653033222c227061796d656e745f61646472657373223a22795669796f4b334e776648354758526f3765344445596b7a7a68426a444e51615147222c227061796d656e745f616d6f756e74223a352c2273746172745f65706f6368223a313438323130353630302c2274797065223a312c2275726c223a2268747470733a2f2f64617368646f742e696f2f702f666c6172653033227d5d5d',
        DataObject: {
          end_epoch: 1513555200,
          name: 'flare03',
          payment_address: 'yViyoK3NwfH5GXRo7e4DEYkzzhBjDNQaQG',
          payment_amount: 5,
          start_epoch: 1482105600,
          type: 1,
          url: 'https://www.gewel.io'
        },
        CreationTime: 1482223714,
        FundingResult: {
            AbsoluteYesCount: 40,
            YesCount: 40,
            NoCount: 0,
            AbstainCount: 0
        },
        ValidResult: {
            AbsoluteYesCount: 74,
            YesCount: 74,
            NoCount: 0,
            AbstainCount: 0
        },
        DeleteResult: {
            AbsoluteYesCount: 0,
            YesCount: 0,
            NoCount: 0,
            AbstainCount: 0
        },
        EndorsedResult: {
            AbsoluteYesCount: 0,
            YesCount: 0,
            NoCount: 0,
            AbstainCount: 0
        } } ]

Proposal Check

GET method:

  /api/gobject/check/[:hexData]
  /api/gobject/check/5b5b2270726f706f736[..]

Sample output:

    {"Object status":"OK"}

Proposal Deserialization

GET method:

  /api/gobject/deserialize/[:hexData]
  /api/gobject/deserialize/5b5b2270726f706f736[..]

Sample output:

{
  "result":"[[\"proposal\",{\"end_epoch\":1519848619,\"name\":\"ghijklmnopqrstuvwxyz01234567891519097947\",\"payment_address\":\"yik5HAgVAgjH1oZKjcDfvcf22bwBNbSYzB\",\"payment_amount\":10,\"start_epoch\":1519097947,\"type\":1,\"url\":\"https://central.gewel.io/p/test_proposal_1519097947\"}]]",
  "error":null,
  "id":78637
}

Proposal Current Votes

GET method:

  /api/gobject/votes/current/[:hash]
  /api/gobject/votes/current/fbda8cdc1f48917f53b7d63fbce81c85d6dedd3d0e476e979926dfd154b84034

Sample output:

{
  "result":"[[\"proposal\",{\"end_epoch\":1519848619,\"name\":\"ghijklmnopqrstuvwxyz01234567891519097947\",\"payment_address\":\"yik5HAgVAgjH1oZKjcDfvcf22bwBNbSYzB\",\"payment_amount\":10,\"start_epoch\":1519097947,\"type\":1,\"url\":\"https://central.gewel.io/p/test_proposal_1519097947\"}]]",
  "error":null,
  "id":78637
}

Governance Budget

GET method:

  /api/governance/budget/[:blockIndex]
  /api/governance/budget/79872

Sample output:

{
    "result":"60.00",
    "error":null,
    "id":75619
}

Submit Proposal

POST method:

  /api/gobject/submit

Exemple input :

{
  "parentHash":"abc",
  "revision":1,
  "time":10009,
  "dataHex":"abc",
  "feeTxId":"abc"
}

Sample output:

{
    "result":"60.00",
    "error":null,
    "id":75619
}

Masternodes List

  /api/masternodes/list

Validate Masternode

  /api/masternodes/validate/[:payee]
  /api/masternodes/validate/yRuALkPpeYpTgxdNn2L5YgGktASJYDYPAo

Sample valid output:

    {
        "valid":true,
        "vin":"e3a6b7878a7e9413898bb379b323c521676f9d460db17ec3bf42d9ac0c9a432f-1",
        "status":"ENABLED",
        "rank":1,
        "ip":"217.182.229.146:19999",
        "protocol":70208,
        "payee":"yRuALkPpeYpTgxdNn2L5YgGktASJYDYPAo",
        "activeseconds":158149,
        "lastseen":1507810068
    }

Historic Blockchain Data Sync Status

  /api/sync

Live Network P2P Data Sync Status

  /api/peer

Status of the Gewel Network

  /api/status?q=xxx

Where "xxx" can be:

getInfo
getDifficulty
getBestBlockHash
getLastBlockHash

Utility Methods

  /api/utils/estimatefee[?nbBlocks=2]

Web Socket API

The web socket API is served using socket.io.

The following are the events published by insight:

tx: new transaction received from network, txlock boolean is set true if a matching txlock event has been observed. This event is published in the 'inv' room. Data will be a app/models/Transaction object. Sample output:

{
  "txid":"00c1b1acb310b87085c7deaaeba478cef5dc9519fab87a4d943ecbb39bd5b053",
  "txlock": false,
  "processed":false
  ...
}

txlock: InstantSend transaction received from network, this event is published alongside the 'tx' event when a transaction lock event occurs. Data will be a app/models/Transaction object. Sample output:

{
  "txid":"00c1b1acb310b87085c7deaaeba478cef5dc9519fab87a4d943ecbb39bd5b053",
  "processed":false
  ...
}

block: new block received from network. This event is published in the inv room. Data will be a app/models/Block object. Sample output:

{
  "hash":"000000004a3d187c430cd6a5e988aca3b19e1f1d1727a50dead6c8ac26899b96",
  "time":1389789343,
  ...
}

<gewelAddress>: new transaction concerning received from network. This event is published in the <gewelAddress> room.

status: every 1% increment on the sync task, this event will be triggered. This event is published in the sync room.

Sample output:

{
  blocksToSync: 164141,
  syncedBlocks: 475,
  upToExisting: true,
  scanningBackward: true,
  isEndGenesis: true,
  end: "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
  isStartGenesis: false,
  start: "000000009f929800556a8f3cfdbe57c187f2f679e351b12f7011bfc276c41b6d"
}

Example Usage

The following html page connects to the socket.io insight API and listens for new transactions.

html

<html>
<body>
  <script src="http://<insight-server>:<port>/socket.io/socket.io.js"></script>
  <script>
    eventToListenTo = 'tx'
    room = 'inv'

    var socket = io("http://<insight-server>:<port>/");
    socket.on('connect', function() {
      // Join the room.
      socket.emit('subscribe', room);
    })
    socket.on(eventToListenTo, function(data) {
      if (data.txlock) {
        console.log("New InstantSend transaction received: " + data.txid)
      } else {
        console.log("New transaction received: " + data.txid)
      }
    })
  </script>
</body>
</html>

Usage no npm install needed!

README

Insight-api

Table of Content

Getting Started

Prerequisites

Query Rate Limit

API HTTP Endpoints

Block

Block Index

Raw Block

Block Summaries

Transaction

Address

Address Properties

Unspent Outputs

Unspent Outputs for Multiple Addresses

InstantSend Transactions

Transactions by Block

Transactions by Address

Transactions for Multiple Addresses

Transaction Broadcasting

Standard transaction

InstantSend transaction

Sporks List

Proposals Informations

Proposals Count

Budget Proposal List

Budget Triggers List

Budget Proposal Detail

Proposal Check

Proposal Deserialization

Proposal Current Votes

Governance Budget

Submit Proposal

Masternodes List

Validate Masternode

Historic Blockchain Data Sync Status

Live Network P2P Data Sync Status

Status of the Gewel Network

Utility Methods

Web Socket API

Example Usage