z_listunifiedreceivers - Zcash

Example code for the z_listunifiedreceivers JSON-RPC method. Сomplete guide on how to use the z_listunifiedreceivers JSON-RPC method in GetBlock.io Web3 documentation.

This method decomposes a Unified Address into its component receivers. Unified Addresses (introduced with NU5) can contain a transparent receiver (p2pkh or p2sh), a Sapling receiver, and/or an Orchard receiver — all in a single encoded string. This method returns the individual receiver strings that a sender can use to direct payments to specific pools.

Parameters

Parameter	Type	Required	Description
unified_address	string	Yes	Unified Address to decompose

Request

cURL

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "z_listunifiedreceivers",
    "params": [
        "u1l8xunezsvhq8fgzfl7404m450nwnd76zshscn6nfys7vyz2ywyh4cc5daaq0c7q2su5lqfh23sp7fkf3kt27ve5948mzpfdvckzaext2jkbmhth7pnfhr37a3wpk3q6clhx"
    ],
    "id": "getblock.io"
}'

Axios

example.js

const axios = require('axios');

const response = await axios.post('https://go.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'z_listunifiedreceivers',
    params: [
        "u1l8xunezsvhq8fgzfl7404m450nwnd76zshscn6nfys7vyz2ywyh4cc5daaq0c7q2su5lqfh23sp7fkf3kt27ve5948mzpfdvckzaext2jkbmhth7pnfhr37a3wpk3q6clhx"
    ],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);

Request

example.py

import requests

response = requests.post(
    'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'z_listunifiedreceivers',
        'params': [
        "u1l8xunezsvhq8fgzfl7404m450nwnd76zshscn6nfys7vyz2ywyh4cc5daaq0c7q2su5lqfh23sp7fkf3kt27ve5948mzpfdvckzaext2jkbmhth7pnfhr37a3wpk3q6clhx"
    ],
        'id': 'getblock.io'
    }
)

print(response.json())

Rust

example.rs

use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "z_listunifiedreceivers",
            "params": [
        "u1l8xunezsvhq8fgzfl7404m450nwnd76zshscn6nfys7vyz2ywyh4cc5daaq0c7q2su5lqfh23sp7fkf3kt27ve5948mzpfdvckzaext2jkbmhth7pnfhr37a3wpk3q6clhx"
    ],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;
    
    println!("Result: {}", response["result"]);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "orchard": "u1...orchard-only-receiver...",
        "sapling": "zs1z7rejlpsa98s2rrrfkwmaxu53e4ue0ulcrw0h4x5g8jl04tak0d3mm47vdtahatqrlkngh9sly",
        "p2pkh": "t1c74RiTicVSKthLmn2c4WFLJdLDs5sQ4X6"
    }
}

Response Parameters

Parameter	Type	Description
orchard	string	Orchard receiver as a standalone address string (present if the UA includes an Orchard receiver)
sapling	string	Sapling receiver as a zs1... address (present if the UA includes a Sapling receiver)
p2pkh	string	Transparent P2PKH receiver as a t1... address (present if the UA includes a P2PKH receiver)
p2sh	string	Transparent P2SH receiver as a t3... address (present if the UA includes a P2SH receiver)

Use Cases

• Send Path Selection: Determine which pool(s) a Unified Address supports before selecting a spending strategy

• Wallet Compatibility Detection: Sending wallets without Orchard support extract the Sapling receiver as a fallback

• Address Analytics: Study Unified Address adoption patterns by receiver-type composition

• Legacy Fallback Support: Wallets on older networks fall back to transparent receivers when shielded support is unavailable

Error Handling

Error Code	Message	Description
-8	Not a Unified Address	Input is not a valid Unified Address
-32602	Invalid params	Address parameter is missing or malformed
-32603	Internal error	Node failed to decompose the address