Blockchain WebSocket API allows developers to receive Real-Time notifications about new transactions and blocks.
Once WebSocket is open you can subscribe to a channel:
SubscribeTransactions: Subscribe to notifications for all new bitcoin transactions.
UnsubscribeTransactions: UnSubscribe to notifications for all new bitcoin transactions.
SubscribeAddress: Receive new transactions for a specific bitcoin address.
UnSubscribeAddress: Stop receiving new transactions for a specific bitcoin address.
Transactions are received OnNewTransaction Event:
{
"op": "utx",
"x": {
"lock_time": 0,
"ver": 1,
"size": 192,
"inputs": [
{
"sequence": 4294967295,
"prev_out": {
"spent": true,
"tx_index": 99005468,
"type": 0,
"addr": "1BwGf3z7n2fHk6NoVJNkV32qwyAYsMhkWf",
"value": 65574000,
"n": 0,
"script": "76a91477f4c9ee75e449a74c21a4decfb50519cbc245b388ac"
},
"script": "483045022100e4ff962c292705f051c2c2fc519fa775a4d8955bce1a3e29884b2785277999ed02200b537ebd22a9f25fbbbcc9113c69c1389400703ef2017d80959ef0f1d685756c012102618e08e0c8fd4c5fe539184a30fe35a2f5fccf7ad62054cad29360d871f8187d"
}
],
"time": 1440086763,
"tx_index": 99006637,
"vin_sz": 1,
"hash": "0857b9de1884eec314ecf67c040a2657b8e083e1f95e31d0b5ba3d328841fc7f",
"vout_sz": 1,
"relayed_by": "127.0.0.1",
"out": [
{
"spent": false,
"tx_index": 99006637,
"type": 0,
"addr": "1A828tTnkVFJfSvLCqF42ohZ51ksS3jJgX",
"value": 65564000,
"n": 0,
"script": "76a914640cfdf7b79d94d1c980133e3587bd6053f091f388ac"
}
]
}
}
SubscribeBlocks: Receive notifications when a new block is found. Note: if the chain splits you will receive more than one notification for a specific block height.
UnSubscribeBlocks: Stop receiving notifications when a new block is found. Note: if the chain splits you will receive more than one notification for a specific block height.
Blocks are received OnNewBlock event:
{
"op": "block",
"x": {
"txIndexes": [
3187871,
3187868
],
"nTx": 0,
"totalBTCSent": 0,
"estimatedBTCSent": 0,
"reward": 0,
"size": 0,
"blockIndex": 190460,
"prevBlockIndex": 190457,
"height": 170359,
"hash": "00000000000006436073c07dfa188a8fa54fefadf571fd774863cda1b884b90f",
"mrklRoot": "94e51495e0e8a0c3b78dac1220b2f35ceda8799b0a20cfa68601ed28126cfcc2",
"version": 1,
"time": 1331301261,
"bits": 436942092,
"nonce": 758889471
}
}