minerd

minerd is a specialized daemon that wraps the functionality of walletd and adds additional functionality useful for miners and mining pools. It also serves the same UI as walletd and the same API endpoints.

Configuration

The configuration for minerd is mostly the same as walletd. The names of the environment variables were changed from starting with the prefix WALLETD_ to MINERD_.

If the getblocktemplate endpoint is used, the payout address needs to be configured. This can be done using the:

• mining.payoutAddress CLI flag
• MINERD_PAYOUT_ADDRESS environment variable
• payoutAddress field in the minerd.yml file under the mining section

Check out the walletd repo for more information on how to configure walletd related settings.

API

minerd serves all walletd API endpoints under /api just like walletd. These are documented here.

Additionally, minerd serves the following endpoints:

POST /api/miner/getblocktemplate

This endpoint can be used to obtain a block template for mining similar to BIP22 templates. The version is either 1 or 2 depending on whether the block is a a V1 or V2 block.

The txType field of transactions is also either 1 or 2 depending on whether the transaction is a V1 or V2 transaction.

Example Request:

{
  "longpollid" : "",
}

Example Response:

{
  "transactions": [
   {
    "data": "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",
    "hash": "",
    "txid": "812ae7bdeed51e3eda4be0db46ae2a84ffe3680d5d69b9fc4a66c4980a5966f2",
    "depends": null,
    "fee": 0,
    "sigops": 0,
    "txtype": "1"
   }
  ],
  "minerpayout": [
   {
    "data": "0d0000000000000003c95a33477c17dad5448000001e781823399a0170cb3d644dfe4c496538fbb4967e28ba2be5b215b7caee661c",
    "hash": "",
    "txid": "",
    "depends": null,
    "fee": 0,
    "sigops": 0,
    "txtype": ""
   }
  ],
  "previousblockhash": "9301ef7440904ad1c6c8c92e017587f37f075763057fc239f9e9ee7f0b54ea63",
  "longpollid": "857eb80c681f36354b2e784869a89a1c",
  "target": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
  "height": 11,
  "curtime": 1742478009,
  "version": 1,
  "bits": "01010000"
 }

POST /api/miner/submitblock

Submits a block to the network. The block is expected to be either V1 or V2 Sia-encoded and then hex-encoded into a string.

Example Request:

{
  "params": [
   "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"
  ]
}

Examples

Check out TestMineGetBlockTemplate in api/api_test.go for a Go example on how to use these endpoints to mine a block and submit it.