How to do sendRawTransaction to bitcoind JSON-RPC using bitcoin-core package in nodejs I am trying to do 

sendrawtransaction &lt;transaction_hex&gt;


from nodejs using bitcoin-core package
i did 

npm install bitcoin-core --save


i already have latest bitcoind setup and running with rpcusername and rpcpassword are set in bitcoin.conf

my current code looks like this.

const Client = require('bitcoin-core');
const client = new Client({ username: 'adminuser', password : 'adminpassword'});

client.getInfo((error, help) =&gt; console.log(help));


i have managed to only get response from getInfo

everything else gives either empty output or undefined or null



so far i have tried many variations like these

tx_hex = "0200000001949e0e3ac02fef76dffa8e2191ee0041f71a90c5ec9bbcba77db5f57e49fe6dd010000006b483045022100d6ac8520a1cfe80f6f3c2fbe6c3f903894203715928382e77c3c7ad0de74112502203c14601e5195dde88c9cc16c45dc273af168bd4fd03b6c045f832b7ba0134f8c012102183e719a510ff322fcb0dbfa279ef2500dd87c0b8c6184480846262e1949fbebfeffffff028bec0900000000001976a9141b0c5cb82d59cb2e07e8d5e343167fda48a9d60e88ace2920f00000000001976a9148108670170211830be2c3c557afe6bc2205d27de88ac864a0700" 

client.sendRawTransaction((tx_hex,response) =&gt; console.log(response));

client.sendRawTransaction((tx_hex) =&gt; console.log());

client.sendRawTransaction((tx_hex), function(){console.log()});


but none of the above gives confirmation, or gives proper output.

what am i missing here ?

i mean if i were to do this using bitcoin-cli on terminal it returns txhash .

e.g.

[root@localhost deploy]# bitcoin-cli sendrawtransaction 0200000001949e0e3ac02fef76dffa8e2191ee0041f71a90c5ec9bbcba77db5f57e49fe6dd010000006b483045022100d6ac8520a1cfe80f6f3c2fbe6c3f903894203715928382e77c3c7ad0de74112502203c14601e5195dde88c9cc16c45dc273af168bd4fd03b6c045f832b7ba0134f8c012102183e719a510ff322fcb0dbfa279ef2500dd87c0b8c6184480846262e1949fbebfeffffff028bec0900000000001976a9141b0c5cb82d59cb2e07e8d5e343167fda48a9d60e88ace2920f00000000001976a9148108670170211830be2c3c557afe6bc2205d27de88ac864a0700
b9ceb300bc4a94dad591d8ecca7e840e7cfafa47c029488424e07666c1e1778b




update1 : 

tx_hex = "0200000001949e0e3ac02fef76dffa8e2191ee0041f71a90c5ec9bbcba77db5f57e49fe6dd010000006b483045022100d6ac8520a1cfe80f6f3c2fbe6c3f903894203715928382e77c3c7ad0de74112502203c14601e5195dde88c9cc16c45dc273af168bd4fd03b6c045f832b7ba0134f8c012102183e719a510ff322fcb0dbfa279ef2500dd87c0b8c6184480846262e1949fbebfeffffff028bec0900000000001976a9141b0c5cb82d59cb2e07e8d5e343167fda48a9d60e88ace2920f00000000001976a9148108670170211830be2c3c557afe6bc2205d27de88ac864a0700" 

client.sendRawTransaction((tx_hex,response) =&gt; console.log(tx_hex + ':' + response));


returns

RpcError: -1 sendrawtransaction "hexstring" ( allowhighfees )

Submits raw transaction (serialized, hex-encoded) to local node and network.

Also see createrawtransaction and signrawtransaction calls.

Arguments:
1. "hexstring"    (string, required) The hex string of the raw transaction)
2. allowhighfees    (boolean, optional, default=false) Allow high fees

Result:
"hex"             (string) The transaction hash in hex

Examples:

Create a transaction
&gt; bitcoin-cli createrawtransaction "[{\"txid\" : \"mytxid\",\"vout\":0}]" "{\"myaddress\":0.01}"
Sign the transaction, and get back the hex
&gt; bitcoin-cli signrawtransaction "myhex"

Send the transaction (signed hex)
&gt; bitcoin-cli sendrawtransaction "signedhex"

As a json rpc call
&gt; curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "sendrawtransaction", "params": ["signedhex"] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/
:undefined
The way you pass parameters is wrong. I use the code below, got the right answer:

const Client = require('bitcoin-core');
const client = new Client({username: 'admin', password: 'password', network: 'testnet'})

const txHex = '0200000001999539009d0d02f2332d257716faa75cc4c9a8318c153ba6a084c719fa33103b000000006a4730440220032470b6b45825fc37d08e1985c7ad2044272edacfa2c76cf49c6b70c09a0dac02202466ede3e660c6d57f65b7ed21f2c1f778116ef92bef9ed2f9b18fcb1881a7b9012103b91ff254ae3bb3861e4a6c16ab356d6c52ccfd2b58bedf0dda84657dfd9d9afcffffffff0130750000000000001976a914ba05ece7632d78336848214b525cfdbd1c4b06a188ac00000000'

client.sendRawTransaction(txHex, (error, response) =&gt; {
  if (error) console.log(error);
  console.log(response);
});