Broadcasting

Transaction Broadcasting from SPV Wallet

The SPV Wallet broadcasts all valid transactions it receives or creates to ARC.

GitHub - bitcoin-sv/go-broadcast-client: Go client for any service with an ARC api - used for tx broadcast.GitHub

ARC Endpoints

We use the first endpoint to determine the correct fee model to use when creating a transaction.

Get the policy settings

This endpoint returns the policy settings.

GEThttps://arc.taal.com/v1/policy

Response

200401

Success

Body

application/json

timestamp*string (date-time)

policy*Policy (object)

Request

JavaScriptCurlPython

const response = await fetch('https://arc.taal.com/v1/policy', {
    method: 'GET',
    headers: {},
});
const data = await response.json();

Response

200

{
  "timestamp": "2025-01-21T07:39:54.825Z",
  "policy": {
    "maxscriptsizepolicy": 500000,
    "maxtxsigopscountspolicy": 4294967295,
    "maxtxsizepolicy": 10000000,
    "miningFee": {
      "satoshis": 1,
      "bytes": 1000
    }
  }
}

Thereafter we simply broadcast to ARC and expect a SEEN_ON_NETWORK txStatus response in most cases.

Submit a transaction.

This endpoint is used to send a raw transaction to a miner for inclusion in the next block that the miner creates.

POSThttps://arc.taal.com/v1/tx

Header parameters

Body

text/plainapplication/jsonapplication/octet-stream

Transaction hex string

string

Example: "<transaction hex string>"

Response

200400401409422460461462463464465467468469473

Success

Body

application/json

timestamp*string (date-time)

blockHashstring

Block hash

Example: "00000000000000000854749b3c125d52c6943677544c8a6a885247935ba8d17d"

blockHeightinteger (uint64)

Block height

Example: 782318

txid*string

Transaction ID in hex

Example: "6bdbcfab0526d30e8d68279f79dff61fb4026ace8b7b32789af016336e54f2f0"

merklePathnullable string

Transaction Merkle path as a hex string in BUMP format BRC-74

Example: "0000"

txStatus*enum

Transaction status

Example: "ACCEPTED_BY_NETWORK"

UNKNOWNQUEUEDRECEIVEDSTOREDANNOUNCED_TO_NETWORKREQUESTED_BY_NETWORKSENT_TO_NETWORKACCEPTED_BY_NETWORKSEEN_IN_ORPHAN_MEMPOOLSEEN_ON_NETWORKDOUBLE_SPEND_ATTEMPTEDREJECTEDMINED

extraInfonullable string

Extra information about the transaction

Example: "Transaction is not valid"

competingTxsnullable array of string

status*integer (int)

Status

Example: 201

title*string

Title

Example: "Added to mempool"

Request

JavaScriptCurlPython

const response = await fetch('https://arc.taal.com/v1/tx', {
    method: 'POST',
    headers: {
      "Content-Type": "text/plain"
    },
    body: JSON.stringify("<transaction hex string>"),
});
const data = await response.json();

Response

200400409422460461462463464465467468469473

{
  "timestamp": "2025-01-21T07:39:54.825Z",
  "blockHash": "00000000000000000854749b3c125d52c6943677544c8a6a885247935ba8d17d",
  "blockHeight": 782318,
  "txid": "6bdbcfab0526d30e8d68279f79dff61fb4026ace8b7b32789af016336e54f2f0",
  "merklePath": "0000",
  "txStatus": "ACCEPTED_BY_NETWORK",
  "extraInfo": "Transaction is not valid",
  "competingTxs": [
    [
      "c0d6fce714e4225614f000c6a5addaaa1341acbb9c87115114dcf84f37b945a6"
    ]
  ],
  "status": 201,
  "title": "Added to mempool"
}

Usually a callbackUrl would be set for async status updates - but if you'd like to manually check the most recent state of a given transaction, you can use this:

Get transaction status.

This endpoint is used to get the current status of a previously submitted transaction.

GEThttps://arc.taal.com/v1/tx/{txid}

Path parameters

txid*string

The transaction ID (32 byte hash) hex string

Response

200401404409

Success

Body

application/json

timestamp*string (date-time)

blockHashstring

Block hash

Example: "00000000000000000854749b3c125d52c6943677544c8a6a885247935ba8d17d"

blockHeightinteger (uint64)

Block height

Example: 782318

txid*string

Transaction ID in hex

Example: "6bdbcfab0526d30e8d68279f79dff61fb4026ace8b7b32789af016336e54f2f0"

merklePathnullable string

Transaction Merkle path as a hex string in BUMP format BRC-74

Example: "0000"

txStatus*enum

Transaction status

Example: "ACCEPTED_BY_NETWORK"

UNKNOWNQUEUEDRECEIVEDSTOREDANNOUNCED_TO_NETWORKREQUESTED_BY_NETWORKSENT_TO_NETWORKACCEPTED_BY_NETWORKSEEN_IN_ORPHAN_MEMPOOLSEEN_ON_NETWORKDOUBLE_SPEND_ATTEMPTEDREJECTEDMINED

extraInfonullable string

Extra information about the transaction

Example: "Transaction is not valid"

competingTxsnullable array of string

Request

JavaScriptCurlPython

const response = await fetch('https://arc.taal.com/v1/tx/{txid}', {
    method: 'GET',
    headers: {},
});
const data = await response.json();

Response

200404409

{
  "timestamp": "2025-01-21T07:39:54.825Z",
  "blockHash": "00000000000000000854749b3c125d52c6943677544c8a6a885247935ba8d17d",
  "blockHeight": 782318,
  "txid": "6bdbcfab0526d30e8d68279f79dff61fb4026ace8b7b32789af016336e54f2f0",
  "merklePath": "0000",
  "txStatus": "ACCEPTED_BY_NETWORK",
  "extraInfo": "Transaction is not valid",
  "competingTxs": [
    [
      "c0d6fce714e4225614f000c6a5addaaa1341acbb9c87115114dcf84f37b945a6"
    ]
  ]
}