API_v2.md

API v2

Chromanode uses socket.io for notification and HTTP for request.

• methods
• notifications
• errors

Methods:

• status
• headers
  • latest
  • query
• transactions
  • raw
  • merkle
  • spent
  • send
• addresses
  • query
• Colored coins
  • getAllColoredCoins
  • getTxColorValues

Status

url

/v2/status

result

{
  "version": "a.b.c",
  "network": "livenet|testnet",
  "progress": "0.943264",
  "latest": {
    "hash": "000000002eb3d5d9cac7d04b56f6d0afba66b46bd3715f0c56a240ef7b491937",
    "height": 329736
  },
  "bitcoind": {
    "version": 99900,
    "protocolversion": 70002,
    "connections": 8,
    "errors": "Warning: This version is obsolete, upgrade required!",
    "latest": {
      "hash": "0000000037859e0b71704e4a24093ca809d4058923af42844d0a3990b191e1fa",
      "height": 349569
    }
  }
}

Headers

Latest

url

/v2/headers/latest

result

{
  "height": 329741,
  "hash": "00000000f872dcf2242fdf93ecfe8da1ba02304ea6c05b56cb828d3c561e9012",
  "header": "02000000f71f5d49b11756cbf9c2b9b53d...1d0047ed74" // 80 bytes
}

Query

Return raw headers for custom query.

* half-open interval for (from-to]

* maximum 2016 headers (one chunk)

url

/v2/headers/query

query

param	description
id	get header with given id
from	hash or height, may be ommited (include zero header in this case)
to	hash or height, may be omitted (preferred than count)
count	number, may be omitted

// get 1 header by height
/v2/headers/query?id=150232

// get header by hash
/v2/headers/query?id=00000000f872dcf...cb828d3c561e9012

// get first chunk (count omitted, because query return maximum 2016 headers)
/v2/headers/query?

result

{
  "from": 329741,
  "count": 2,
  "headers": "00000000f872dcf2242fdf93ecfe8da1ba02304e...69a632dcb" // 160 bytes
}

errors

{"type": "FromNotFound"}
{"type": "HeaderNotFound"}
{"type": "InvalidCount"}
{"type": "InvalidHash"}
{"type": "InvalidHeight"}
{"type": "InvalidRequestedCount"}
{"type": "ToNotFound"}

Transactions

Raw

url

/v2/transactions/raw

query

param	description
txid	transaction id

/v2/transactions/raw?txid=f9f12dafc3d4ca3fd9cdf293873ad1c6b0bddac35dcd2bd34a57320772def350

result

{"hex": "010000000161ad9192...277c850ef12def7248188ac00000000"}

errors

{"type": "InvalidTxId"}
{"type": "TxNotFound"}

Merkle

url

/v2/transactions/merkle

query

param	description
txid	transaction id

/v2/transactions/merkle?txid=d04888787b942ae2d81a878048d29640e5bcd109ebfe7dd2abdcd8e9ce8b5453

result

// for unconfirmed transactions
{"source": "mempool"}

// for confirmed transactions
{
  "source": "blocks",
  "block": {
    "height": 103548,
    "hash": "0000000048f98df71a9d3973c55ac5543735f8ef801603caea2bdf22d77e8354",
    "merkle": [
      "8894f3284e9fa1121b0b8935a211c4988db4fc2e44640f4da7a85eb6ea4652c7",
      "5f9829e099080e3b22933972b9428e6650163ef0b5a9498696d4599c6e30985f",
      "dd3f8d347786991cdf39abae6252474291711031247a1c1d5e2d27aa0964c6c8",
      "3d20e80d705bbf73b3dea3c08c970a756ea1d79b0f2500282be76fbbff303a49"
    ],
    "index": 2
  }
}

errors

{"type": "InvalidTxId"}
{"type": "TxNotFound"}

Spent

Find whether a specific transaction output is spent and who spends it. That is, given txid and vout find txid and height.

url

/v2/transactions/spent

query

param	description
txid	output transaction id
vout	output index

/v2/transactions/spent?txid=f8fa0c30e57a5900c7a0fd96f73ebebe8eafb4667224c3e49a172c20e2b58235&vout=0

result

// When spent
{
  "spent": true,
  "txid": "19bbfd7fdade0d158fa9e5dd80cf6b8a8bfa85370845c6c356ab1e1f783178b0",
  "height": 508508
}

// When unspent
{
  "spent": false
}

errors

{"type": "InvalidTxId"}
{"type": "TxNotFound"}

Send

url

/v2/transactions/send

query

param	description
rawtx	raw transaction

curl http://localhost:3001/v2/transactions/send --header "Content-Type:application/json" -d '{"rawtx": "..."}'

result

empty response if success

errors

{"type": "SendTxError", "code": -8, "message": "parameter must be hexadeci..."}

Addresses

Query

* half-close interval for (from-to]

url

/v2/addresses/query

query

param	description
addresses	array of addresses
source	blocks or mempool, may be omitted (both will be used)
from	hash or height, may be omitted
to	hash or height, may be omitted
status	transactions (by default) or unspent, may be omitted

// get all affected transactions for addresses (from blocks and mempool)
/v2/addresses/query?addresses=mkXsnukPxC8FuEFEWvQdJNt6gvMDpM8Ho2,msGccLNBLYWBg9U1J2RVribprvsEF3uYGK

// all affected transactions from blocks that have at least one unspent output from height #103548
/v2/addresses/query?addresses=mkXsnukPxC8FuEFEWvQdJNt6gvMDpM8Ho2&source=blocks&from=103548&status=unspent

// all affected transactions from mempool
/v2/addresses/query?addresses=mkXsnukPxC8FuEFEWvQdJNt6gvMDpM8Ho2&source=mempool

// all affected transactions for half-closed interval (fromHash, toHash]
/v2/addresses/query?addresses=mkXsnukPxC8FuEFEWvQdJNt6gvMDpM8Ho2&from=0000000048f98df71a9d3973c55ac5543735f8ef801603caea2bdf22d77e8354&to=0000000011ab0934769901d4acde41e48a98a7cdaf9d7626d094e66368443560

result

// empty status, for mempool transactions height is null
{
  "transactions": [{
    "txid": "5f450e47d9ae60f156d366418442f7c454fd4a343523edde7776af7a7d335ac6",
    "height": 318345
  }, ... {
    "txid": "fba4a74006c51bdf5efdc69c7a9a6e188a2a0de62486f2719d8335bb96984932",
    "height": 329740
  }, {
    "txid": "ab139c6e7054d086ca65f1b7173ee31ef39a1d0ad1797b4addd82f4028dfa0d1",
    "height": null
  }],
  "latest": {
    "height": 329750,
    "hash": "0000000045dd9bad2000dd00b31762c3da32ac46f40cdf4ddd350bcc3571a253"
  }
}

// status is unspent
{
  "unspent": [{
    "txid", "a9566f182b27355b4a7470d7fd77809ba0a5a3d19831e271516fe38584c33dee",
    "vout": 0,
    "value": 5000000000,
    "script": "76a914c3d093c756dc4f8dd817b503c64ecb802776213488ac",
    "height": 130241
  }, {
    "txid": "ddd1b0bfefcac0163d1b9298a520d4b90b0bffe8947caf0989ffa6da0f536a99",
    "vout": 0,
    "value": 330000,
    "script": "76a9143ee467c487c69df0828614f27bdb55eb7c4d679d88ac",
    "height": null
  }],
  "latest": {
    "height": 329750,
    "hash": "0000000045dd9bad2000dd00b31762c3da32ac46f40cdf4ddd350bcc3571a253"
  }
}

errors

{"type": "FromNotFound"}
{"type": "InvalidAddresses"}
{"type": "InvalidHash"}
{"type": "InvalidHeight"}
{"type": "InvalidSource"}
{"type": "InvalidStatus"}
{"type": "ToNotFound"}

Colored coins

getAllColoredCoins

url

/v2/cc/getAllColoredCoins

query

param	description
color	color description string

curl http://localhost:3001/v2/cc/getAllColoredCoins --header "Content-Type:application/json" -d '{"color": "..."}'

result

{
  "coins": [{
    "txId": "1746b8a0843b9105d2cad568940cae641d7470e6a2b2494a0c453ef26d21be54",
    "outIndex": 0,
    "colorValue": 1500
  }, {
    "txId": "1e35b285bcb2afbe8ed918dd6abf79bf0a394e4412919d461ea1b6f48f498045",
    "outIndex": 1,
    "colorValue": 99990000
  }]
}

errors

{"type": "InvalidColor"}

getTxColorValues

url

/v2/cc/getTxColorValues

query

param	description
txId	transaction id
outIndex	output index, may be omitted
outIndices	output indices, may be ommited (preferred than outIndex, all index by default)
colorKernel	color kernel code, may be ommited (epobc by default)
inputs	include color values for inputs

curl http://localhost:3001/v2/cc/getTxColorValues --header "Content-Type:application/json" -d '{"txId": "..."}'

result

{
  "colorValues": [{
    color: "epobc:83e96d768c744e78f486e99b5a85f57e319ffef9890b130a914aacbb70ae7563:0:0",
    value: 90
  }, {
    color: "epobc:83e96d768c744e78f486e99b5a85f57e319ffef9890b130a914aacbb70ae7563:0:0",
    value: 10
  },
  null,
  null
  ]
}

errors

{"type": "InvalidColorKernel"}
{"type": "InvalidOutIndices"}
{"type": "MultipleColorsOutIndex"}
{"type": "TxNotFound"}

Notifications:

• new-block
• new-tx
• tx
• address
• status

new-block

var io = require('socket.io-client')
var socket = io('http://localhost:3001/v2')
socket.on('connect', function () {
  socket.emit('subscribe', {type: 'new-block'})
})
socket.on('new-block', function (payload) {
  console.log(
    'New block ' + payload.hash + '! (height: ' + payload.height + ')')
})

new-tx

var io = require('socket.io-client')
var socket = io('http://localhost:3001/v2')
socket.on('connect', function () {
  socket.emit('subscribe', {type: 'new-tx'})
})
socket.on('new-tx', function (payload) {
  console.log('New tx:', payload.txid)
})

tx

var tx = new require('bitcore').Transaction()
  .from(...)
  .to(...)
  .change(...)
  .sign(...)

var io = require('socket.io-client')
var socket = io('http://localhost:3001/v2')
socket.on('connect', function () {
  socket.emit('subscribe', {type: 'tx', txid: tx.hash})
  blockchain.propagate(tx.toString()) // broadcast tx ...
})
socket.on('tx', function (payload) {
  if (payload.txid !== tx.hash || payload.blockHash === null) {
    return
  }

  console.log('Tx included in block ', payload.blockHeight)
  socket.emit('unsubscribe', {type: 'tx', txid: tx.hash})
})

address

var io = require('socket.io-client')
var socket = io('http://localhost:3001/v2')
socket.on('connect', function () {
  socket.emit('subscribe', {
    type: 'address',
    address: 'mkXsnukPxC8FuEFEWvQdJNt6gvMDpM8Ho2'
  })
})
socket.on('address', function (payload) {
  console.log('New affected tx:', payload.txid)
})

status

var io = require('socket.io-client')
var socket = io('http://localhost:3001/v2')
socket.on('connect', function () {
  socket.emit('subscribe', {type: 'status'})
})
socket.on('status', function (status) {
  console.log('New status:', status)
})

Errors

• FromNotFound
• HeaderNotFound
• InvalidAddresses
• InvalidColor
• InvalidColorKernel
• InvalidCount
• InvalidHash
• InvalidHeight
• InvalidOutIndices
• InvalidRequestedCount
• InvalidTxId
• InvalidSource
• InvalidStatus
• MultipleColorsOutIndex
• SendTxError
• ToNotFound
• TxNotFound