WoC Sockets V1 (Deprecated)

This API is deprecated, please use the V2 going forward.

We recommend the centrifuge websocket client side libraries below:

• centrifuge-js – for a browser, NodeJS and React Native

• centrifuge-go - for Go language

• centrifuge-mobile - for iOS/Android with centrifuge-go as basis and gomobile

• centrifuge-dart - for Dart and Flutter

• centrifuge-swift – for native iOS development

• centrifuge-java – for native Android development and general Java

Non-centrifuge clients connect to separate endpoints specified in each section.

The supported networks are:

• Mainnet

• Testnet

Simple js example using centrifuge client:

    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    <script type="text/javascript" src="https://cdn.jsdelivr.net/gh/centrifugal/centrifuge-js@latest/dist/centrifuge.min.js"></script>
    <script type="text/javascript">
    $(function () {
        const centrifuge = new Centrifuge('wss://socket.whatsonchain.com/blockheaders');

        centrifuge.on('publish', function(message) {
              console.log('Data: '+   JSON.stringify(message.data, null, 2))
        });

        centrifuge.on('disconnect', function(ctx){
            console.log('Disconnected: ' + ctx.reason + (ctx.reconnect?", will try to reconnect":", won't try to reconnect"));
        });

        centrifuge.on('connect', function(ctx){
            console.log('Connected with client ID ' + ctx.client + ' over ' + ctx.transport );
        });

        centrifuge.connect();
    });
    </script>

Simple js example using websocket API client

    <script type="text/javascript">
        window.addEventListener('load', function() {
            let clientID;
            let reconnect = true;
            let numFailures = 0;

            function connect() {
                // Subscribe to multiple channels
                const ws = new WebSocket('wss://socket.whatsonchain.com/websocket?channels=woc:chainStats');
                ws.onopen = function(e) {
                    numFailures = 0;
                    console.log("websocket: connection open",e);
                    // This is required to trigger connect on server side.
                 ws.send(JSON.stringify({}));
                };

                ws.onerror = function(e) {
                    numFailures++;
                    console.log("websocket: connection error: ", e);
                };

                ws.onclose = function (e) {
                    if (!reconnect) {
                        return;
                    }
                    setTimeout(function () {
                        console.log("websocket: connection reconnecting");
                        connect();
                    }, Math.min(numFailures * 1000, 20000));
                }

                ws.onmessage = function(e) {
                    console.log("websocket: new message");
                    processData(e.data);
                };
            }

            connect();

            function processData(rawData) {
                if (rawData.length === 0) {
                    console.log("--> ping");
                    return
                }
                console.log("--> " + rawData);
                const data = JSON.parse(rawData);
                const pushType = data.type || 0;
                switch (pushType) {
                    case 0:
                        console.log("new data from a channel " + data.channel + ": " + JSON.stringify(data.data));
                        break;
                    case 6:
                        clientID = data.data.client;
                        let subscriptions = [];
                        const subs = data.data.subs;
                        if (subs) {
                            for (const m in subs) {
                                if (subs.hasOwnProperty(m)) {
                                    subscriptions.push(m);
                                }
                            }
                        }
                        console.log("connected with client ID " + clientID + " and subscriptions: " + JSON.stringify(subscriptions));
                        break;
                    case 7:
                        clientID = null;
                        if (!data.data.reconnect) {
                            reconnect = false;
                            ws.close();
                            console.log("disconnected from a server, won't reconnect");
                        } else {
                            console.log("disconnected from a server, will reconnect");
                        }
                        break;
                    case 3:
                    console.log("unsubscribed from a channel " + data.channel);
                        break;
                    case 5:
                    console.log("subscribed to a channel " + data.channel);
                        break;
                    default:
                    console.log("unsupported push type " + data.type);
                }
            }

        });
    </script>

New Block Header Event

Receive new block header events in real time.

URL

• Mainnet: wss://socket.whatsonchain.com/websocket?channels=woc:blockHeader

• Testnet: wss://socket-testnet.whatsonchain.com/websocket?channels=woc:blockHeader

URL - for centrifuge clients

• Mainnet: wss://socket.whatsonchain.com/blockheaders

• Testnet: wss://socket-testnet.whatsonchain.com/blockheaders

Data JSON structure

{
  "hash": "0000000000000000010cb155a44577ff3541940ec4355c026dc2706fb7e261d6",
  "confirmations": 4,
  "size": 1229956,
  "height": 676421,
  "version": 541065216,
  "versionHex": "20400000",
  "merkleroot": "e2f64e87c0362314b65dc28b4367c41d904c22b891b652951779336ef735386b",
  "txcount": 654,
  "time": 1614534798,
  "mediantime": 1614527058,
  "nonce": 610133701,
  "bits": "180d359d",
  "difficulty": 83235621087.7299,
  "chainwork": "00000000000000000000000000000000000000000127d3854a414d8ec8f53190",
  "previousblockhash": "00000000000000000428ca33597675bd85f5a2ef464ba25e4db7b4a74d898d33",
  "nextblockhash": "00000000000000000cb40c1d850dece5cd3747e08a1e4066ef887251388c4ae6",
  "coinbaseTx": {
    "hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff410345520a2f7461616c2e636f6d2f506c656173652070617920302e3520736174732f627974652c20696e666f407461616c2e636f6d6eead6b0ad91f2ce86be0400ffffffff0176674325000000001976a9148e9170be3f733a9773c907517fb9b786f1c884c688ac00000000",
    "txid": "13686a10870d23b4c94642bf0b78d6630e2640fc0de83bc30af835d96bb17482",
    "hash": "13686a10870d23b4c94642bf0b78d6630e2640fc0de83bc30af835d96bb17482",
    "size": 150,
    "version": 1,
    "locktime": 0,
    "vin": [
      {
        "coinbase": "0345520a2f7461616c2e636f6d2f506c656173652070617920302e3520736174732f627974652c20696e666f407461616c2e636f6d6eead6b0ad91f2ce86be0400",
        "sequence": 4294967295
      }
    ],
    "vout": [
      {
        "value": 6.2517439,
        "n": 0,
        "scriptPubKey": {
          "asm": "OP_DUP OP_HASH160 8e9170be3f733a9773c907517fb9b786f1c884c6 OP_EQUALVERIFY OP_CHECKSIG",
          "hex": "76a9148e9170be3f733a9773c907517fb9b786f1c884c688ac",
          "reqSigs": 1,
          "type": "pubkeyhash",
          "addresses": [
            "1DzqBck9oyCBzxJbbje2s15deZis6BeATi"
          ],
          "isTruncated": false
        }
      }
    ],
    "blockhash": "0000000000000000010cb155a44577ff3541940ec4355c026dc2706fb7e261d6",
    "confirmations": 4,
    "time": 1614534798,
    "blocktime": 1614534798
  }
}

Block Headers History

Stream block headers starting at a pre-specified block height.

URL

• Mainnet: wss://socket.whatsonchain.com/websocket/history?from=<blockHeight>

• Testnet: wss://socket-testnet.whatsonchain.com/websocket/history?from=<blockHeight>

URL - for centrifuge clients

• Mainnet: wss://socket.whatsonchain.com/blockheaders/history?from=<blockHeight>

• Testnet: wss://socket-testnet.whatsonchain.com/blockheaders/history?from=<blockHeight>

Data JSON structure

{
  "hash": "000000000000000007dde2992ff13fdaba5473341af1c45d0c19c86deb4c732a",
  "confirmations": 1,
  "size": 3449218,
  "height": 676417,
  "version": 536870912,
  "versionHex": "20000000",
  "merkleroot": "df1fe3b56cacd2f4063fbe41d15b51071c72d5748d265f4e61793db79ce0d8ff",
  "txcount": 8859,
  "time": 1614529458,
  "mediantime": 1614524118,
  "nonce": 347880361,
  "bits": "180d6633",
  "difficulty": 82056657294.07133,
  "chainwork": "00000000000000000000000000000000000000000127d3376e97bb73257c98c5",
  "previousblockhash": "00000000000000000b04692ac2bf62654e2ea577476e20ea74eb9e5b53f0ed48",
  "nextblockhash": ""
}

Block Transactions

Stream transactions from a block height and transaction index.

• hex, vin and vout values are not published for message sizes greater than 10MB. Recommended to fetch details for such transactions using the REST endpoints using the published txid value.

URL

• Mainnet: wss://socket.whatsonchain.com/websocket/transactions?from=<blockHeight>&txIndex={txIndex}&to=<blockHeight>&format={hex|json}

• Testnet: wss://socket-testnet.whatsonchain.com/websocket/transactions?from=<blockHeight>&txIndex={txIndex}&to=<blockHeight>&format={hex|json}

URL - for centrifuge clients

• Mainnet: wss://socket.whatsonchain.com/block/transactions?from=<blockHeight>&txIndex={txIndex}&to=<blockHeight>&format={hex|json}

• Testnet: wss://socket-testnet.whatsonchain.com/block/transactions?from=<blockHeight>&txIndex={txIndex}&to=<blockHeight>&format={hex|json}

Data JSON structure

{
  "txid": "20ac30f5aa6aebc0f9e532f32a9691bf7faa332c755d6aea1fd3f6ba36d195e8",
  "hash": "20ac30f5aa6aebc0f9e532f32a9691bf7faa332c755d6aea1fd3f6ba36d195e8",
  "size": 219,
  "version": 2,
  "locktime": 0,
  "vin": [
    {
      "txid": "15b416adf871f9285788ebf36b67714d9e49f413f3a3f083d80e01535bd40433",
      "vout": 1,
      "scriptSig": {
        "asm": "304402204ac1d9f22f09044f66aa6055835b19d5617c19ef180422683b9d168da272e40d022078d3e876f7134eb29cd9e26081feae70f393a1aa3e9926307233f1c419bd1eb641 02a3089907380f086e9d5616ef6e62876a2777ea0c5abca785b15ef92d173afdff",
        "hex": "47304402204ac1d9f22f09044f66aa6055835b19d5617c19ef180422683b9d168da272e40d022078d3e876f7134eb29cd9e26081feae70f393a1aa3e9926307233f1c419bd1eb6412102a3089907380f086e9d5616ef6e62876a2777ea0c5abca785b15ef92d173afdff"
      },
      "sequence": 4294967295
    }
  ],
  "vout": [
    {
      "value": 0,
      "n": 0,
      "scriptPubKey": {
        "asm": "OP_FALSE OP_RETURN 39366665313633626131303138386636",
        "hex": "006a1039366665313633626131303138386636",
        "type": "nulldata",
        "isTruncated": false
      }
    },
    {
      "value": 0.00007511,
      "n": 1,
      "scriptPubKey": {
        "asm": "OP_DUP OP_HASH160 966a0c69734d51307ba0bcfcd9092b51addfaf78 OP_EQUALVERIFY OP_CHECKSIG",
        "hex": "76a914966a0c69734d51307ba0bcfcd9092b51addfaf7888ac",
        "reqSigs": 1,
        "type": "pubkeyhash",
        "addresses": [
          "1EiKQ9qiAkjDn86JvUt6aJpZvETq8uim2D"
        ],
        "isTruncated": false
      }
    }
  ]
}

URL Parameters

Parameter	Description
blockHeight	The height of the block.
txIndex	Index of a transaction as a starting point in the first block to deliver. Default value 0.
format	Hex or json. If hex, the response will include transaction hex and metadata. If json, hex is excluded. Default value is json.

Mempool Transactions

Receive mempool transactions in real time.

• Mempool transactions are collected from multiple nodes.

• Client side should be idempotent because duplicate transaction events are not guaranteed to have been removed.

• hex, vin and vout values are not published for message sizes greater than 10MB. Recommended to fetch details for such transactions using the REST endpoints using the published txid value.

URL

• Mainnet: wss://socket.whatsonchain.com/websocket?channels=woc:mempoolTx?filter=<filter1,filter2,...>

• Testnet: wss://socket-testnet.whatsonchain.com/websocket?channels=woc:mempoolTx?filter=<filter1,filter2,...>

URL - for centrifuge clients

• Mainnet: wss://socket.whatsonchain.com/mempool?filter=<filter1,filter2,...>

• Testnet: wss://socket-testnet.whatsonchain.com/mempool?filter=<filter1,filter2,...>

Data JSON structure

{
  "hex": "02 ...",
  "txid": "20ac30f5aa6aebc0f9e532f32a9691bf7faa332c755d6aea1fd3f6ba36d195e8",
  "hash": "20ac30f5aa6aebc0f9e532f32a9691bf7faa332c755d6aea1fd3f6ba36d195e8",
  "size": 219,
  "version": 2,
  "locktime": 0,
  "vin": [
    {
      "txid": "15b416adf871f9285788ebf36b67714d9e49f413f3a3f083d80e01535bd40433",
      "vout": 1,
      "scriptSig": {
        "asm": "304402204ac1d9f22f09044f66aa6055835b19d5617c19ef180422683b9d168da272e40d022078d3e876f7134eb29cd9e26081feae70f393a1aa3e9926307233f1c419bd1eb641 02a3089907380f086e9d5616ef6e62876a2777ea0c5abca785b15ef92d173afdff",
        "hex": "47304402204ac1d9f22f09044f66aa6055835b19d5617c19ef180422683b9d168da272e40d022078d3e876f7134eb29cd9e26081feae70f393a1aa3e9926307233f1c419bd1eb6412102a3089907380f086e9d5616ef6e62876a2777ea0c5abca785b15ef92d173afdff"
      },
      "sequence": 4294967295
    }
  ],
  "vout": [
    {
      "value": 0,
      "n": 0,
      "scriptPubKey": {
        "asm": "OP_FALSE OP_RETURN 39366665313633626131303138386636",
        "hex": "006a1039366665313633626131303138386636",
        "type": "nulldata",
        "isTruncated": false
      }
    },
    {
      "value": 0.00007511,
      "n": 1,
      "scriptPubKey": {
        "asm": "OP_DUP OP_HASH160 966a0c69734d51307ba0bcfcd9092b51addfaf78 OP_EQUALVERIFY OP_CHECKSIG",
        "hex": "76a914966a0c69734d51307ba0bcfcd9092b51addfaf7888ac",
        "reqSigs": 1,
        "type": "pubkeyhash",
        "addresses": [
          "1EiKQ9qiAkjDn86JvUt6aJpZvETq8uim2D"
        ],
        "isTruncated": false
      }
    }
  ]
}

URL Parameters

Parameter	Description
filter	The filter transactions based on the output (vout) types. The available filters are: nulldata, multisig, pubkey, pubkeyhash, scripthash, and nonstandard.

Chain Stats

Receive common chain stats every 10 seconds.

URL

• Mainnet: wss://socket.whatsonchain.com/websocket?channels=woc:chainStats

• Testnet: wss://socket-testnet.whatsonchain.com/websocket?channels=woc:chainStats

URL - for centrifuge clients

• Mainnet: wss://socket.whatsonchain.com/stats

• Testnet: wss://socket-testnet.whatsonchain.com/stats

Data JSON structure

{
   "chainSummary":{
      "blocks":691040,
      "bestblockhash":"000000000000000006f693315876096d472a8313780df342905e1003a6cf0b70",
      "difficulty":102522924402.0986,
      "chainwork":"0000000000000000000000000000000000000000012cfa97321f921dab48da26",
      "networkhashps":650555175336335400,
      "circulatingSupply":18756500,
      "mempoolSize":6554,
      "mempoolBytes":16540861,
      "mempoolUsage":26650576,
      "exchangeRate":{
         "currency":"USD",
         "rate":"170.70749999999998"
      }
   },
   "latestBlocks":[
      {
         "hash":"000000000000000006f693315876096d472a8313780df342905e1003a6cf0b70",
         "confirmations":1,
         "size":208141,
         "height":691040,
         "version":538968064,
         "versionHex":"20200000",
         "merkleroot":"e3454f52b6715dcf4db5d8c8f237344ef6bd6d415d6e754a3b4b1083cd3ab48c",
         "txcount":102,
         "time":1623330613,
         "mediantime":1623328816,
         "nonce":3022302528,
         "bits":"180ab971",
         "difficulty":102522924402.0986,
         "chainwork":"0000000000000000000000000000000000000000012cfa97321f921dab48da26",
         "previousblockhash":"0000000000000000013ab5705e150967a057f807f396628231a7ceaa11a0bac1",
         "nextblockhash":"",
         "coinbaseTx":{...},
         "totalFees":0.0009790499999997593
      },
      {...},
      ...
   ]
}