# Steem Developer Portal

Used to broadcast transactions and blocks. These AppBase API methods are still under development and subject to change.

Also see: Blockchain Ops

- Working on mainnet
- Working on testnet

#### network_broadcast_api.broadcast_block

Used to broadcast a block.

##### Query Parameters JSON

    {
      "block": {
        "previous": "0000000000000000000000000000000000000000",
        "timestamp": "1970-01-01T00:00:00",
        "witness": "",
        "transaction_merkle_root": "0000000000000000000000000000000000000000",
        "extensions": [],
        "witness_signature": "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "transactions": []
      }
    }

##### Expected Response JSON

    {}

##### Example `curl`

    curl -s --data '{"jsonrpc":"2.0", "method":"network_broadcast_api.broadcast_block", "params":{"block":{"previous":"0000000000000000000000000000000000000000","timestamp":"1970-01-01T00:00:00","witness":"","transaction_merkle_root":"0000000000000000000000000000000000000000","extensions":[],"witness_signature":"0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","transactions":[]}}, "id":1}' https://api.steemit.com

- Working on mainnet
- Working on testnet

#### network_broadcast_api.broadcast_transaction

Used to broadcast a transaction.

##### Query Parameters JSON

    {
      "trx": {
        "ref_block_num": 0,
        "ref_block_prefix": 0,
        "expiration": "1970-01-01T00:00:00",
        "operations": [],
        "extensions": [],
        "signatures": []
      },
      "max_block_age": -1
    }

##### Expected Response JSON

    {}

##### Example `curl`

    curl -s --data '{"jsonrpc":"2.0", "method":"network_broadcast_api.broadcast_transaction", "params":{"trx":{"ref_block_num":1097,"ref_block_prefix":2181793527,"expiration":"2016-03-24T18:00:21","operations":[{"type":"vote_operation","value":{"voter":"steemit","author":"alice","permlink":"a-post-by-alice","weight":10000}}],"extensions":[],"signatures":[]},"max_block_age":50}, "id":1}' https://api.steemit.com

    curl -s --data '{"jsonrpc":"2.0", "method":"network_broadcast_api.broadcast_transaction", "params":{"trx":{"ref_block_num":1097,"ref_block_prefix":2181793527,"expiration":"2016-03-24T18:00:21","operations":[{"type":"pow_operation","value":{"worker_account":"cloop3","block_id":"00000449f7860b82b4fbe2f317c670e9f01d6d9a","nonce":3899,"work":{"worker":"STM7P5TDnA87Pj9T4mf6YHrhzjC1KbPZpNxLWCcVcHxNYXakpoT4F","input":"ae8e7c677119d22385f8c48026fee7aad7bba693bf788d7f27047f40b47738c0","signature":"1f38fe9a3f9989f84bd94aa5bbc88beaf09b67f825aa4450cf5105d111149ba6db560b582c7dbb026c7fc9c2eb5051815a72b17f6896ed59d3851d9a0f9883ca7a","work":"000e7b209d58f2e64b36e9bf12b999c6c7af168cc3fc41eb7f8a4bf796c174c3"},"props":{"account_creation_fee":{"amount":"100000","precision":3,"nai":"@@000000021"},"maximum_block_size":131072,"sbd_interest_rate":1000}}}],"extensions":[],"signatures":[]},"max_block_age":50}, "id":1}' https://api.steemit.com