avm.issueTx - AVAX

Example code for the avm.issueTx JSON-RPC method. Complete guide on how to use avm.issueTx JSON-RPC in GetBlock Web3 documentation.

Broadcasts a signed X-Chain transaction to the network. The transaction must be constructed and signed offline (typically via AvalancheJS) and submitted as an encoded blob.

Parameters

Parameter

Type

Required

Description

string

Yes

Signed transaction blob

encoding

string

Encoding — "hex" (default) or "cb58"

Request Example

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/ext/bc/X' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "avm.issueTx",
    "params": {
        "tx": "0x0000000000000003000000000000000000000000000000000000000000000000000000000000000000000000...",
        "encoding": "hex"
    },
    "id": "getblock.io"
}'

import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "avm.issueTx",
    "params": {
        "tx": "0x0000000000000003000000000000000000000000000000000000000000000000000000000000000000000000...",
        "encoding": "hex"
    },
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/ext/bc/X',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data, null, 2)))
    .catch(error => console.log(error));

import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/ext/bc/X"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "avm.issueTx",
    "params": {
        "tx": "0x0000000000000003000000000000000000000000000000000000000000000000000000000000000000000000...",
        "encoding": "hex"
    },
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)

use reqwest::Client;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let payload = json!({
        "jsonrpc": "2.0",
        "method": "avm.issueTx",
        "params": {
                "tx": "0x0000000000000003000000000000000000000000000000000000000000000000000000000000000000000000...",
                "encoding": "hex"
        },
        "id": "getblock.io"
});

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/ext/bc/X")
        .header("Content-Type", "application/json")
        .json(&payload)
        .send()
        .await?;

    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);

    Ok(())
}

Response Example

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "txID": "2kxwWpHvZPhMsJcSTmM7a3Da7sExB8pPyF7t4cr2NSwnYqNHni"
    }
}

Response Parameters

Field

Type

Description

result.txID

string

Transaction ID — use avm.getTxStatus to track inclusion

Use Cases

Broadcasting X-Chain asset transfers
Creating new native assets on Avalanche
Atomic cross-chain operations from X-Chain

Error Handling

Status Code

Error Message

Cause

404

Not Found

Missing or invalid <ACCESS-TOKEN>

-32602

Invalid params

Request parameters are missing or malformed

429

Too Many Requests

Rate limit exceeded for your plan

-32000

Invalid transaction

Signature invalid, malformed body, or insufficient funds

SDK Integration

// AvalancheJS provides typed clients for P-Chain and X-Chain.
// X-Chain operations are exposed through `avm` in AvalancheJS.
// For raw JSON-RPC access, use a generic HTTP client as in the Request Example.
import axios from 'axios';

const response = await axios.post('https://go.getblock.io/<ACCESS-TOKEN>/ext/bc/X', {
    jsonrpc: '2.0',
    id: 'getblock.io',
    method: 'avm.issueTx',
    params: {"tx": "0x0000000000000003000000000000000000000000000000000000000000000000000000000000000000000000...", "encoding": "hex"}
}});
console.log(response.data);

# AvalancheJS is JavaScript-only. For Python, use a generic JSON-RPC client.
import requests
import json

url = 'https://go.getblock.io/<ACCESS-TOKEN>/ext/bc/X'
payload = {
    'jsonrpc': '2.0',
    'id': 'getblock.io',
    'method': 'avm.issueTx',
    'params': {"tx": "0x0000000000000003000000000000000000000000000000000000000000000000000000000000000000000000...", "encoding": "hex"}
}}
response = requests.post(url, json=payload)
print(response.json())

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