sui_getMoveFunctionArgTypes - Sui

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

This method returns the argument types of a Move function on the SUI network. This is useful for understanding function signatures, building transaction calls, and validating inputs before execution.

Parameters

Parameter

Type

Required

Description

package

ObjectID

Yes

Package object ID

module

string

Yes

Module name

function

string

Yes

Function name

Request Example

cURL

curl -X POST https://go.getblock.io/<ACCESS-TOKEN>/ \
-H "Content-Type: application/json" \
-d '{
  "jsonrpc": "2.0",
  "id": "getblock.io",
  "method": "sui_getMoveFunctionArgTypes",
  "params": [
    "0xa0a7b108f5023b7356f2c6a4be6f058e267aae38e08260c7d519d8641897490c",
    "suifrens",
    "mint"
  ]
}'

request.js

const axios = require('axios');

const payload = {
  jsonrpc: '2.0',
  id: 'getblock.io',
  method: 'sui_getMoveFunctionArgTypes',
  params: [
    '0xa0a7b108f5023b7356f2c6a4be6f058e267aae38e08260c7d519d8641897490c',
    'suifrens',
    'mint'
  ]
};

axios.post('https://go.getblock.io/<ACCESS-TOKEN>/', payload)
.then(response => console.log(response.data));

request.py

import requests

payload = {
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "method": "sui_getMoveFunctionArgTypes",
    "params": [
        "0xa0a7b108f5023b7356f2c6a4be6f058e267aae38e08260c7d519d8641897490c",
        "suifrens",
        "mint"
    ]
}

response = requests.post("https://go.getblock.io/<ACCESS-TOKEN>/", json=payload)
print(response.json())

request.rs

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",
        "id": "getblock.io",
        "method": "sui_getMoveFunctionArgTypes",
        "params": [
            "0xa0a7b108f5023b7356f2c6a4be6f058e267aae38e08260c7d519d8641897490c",
            "suifrens",
            "mint"
        ]
    });
    let response = client.post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .json(&payload).send().await?;
    println!("{}", response.text().await?);
    Ok(())
}

Response Example

response.json

{
  "jsonrpc": "2.0",
  "result": [
    "Pure",
    { "Object": "ByMutableReference" },
    { "Object": "ByValue" }
  ],
  "id": "getblock.io"
}

Response Parameters

Parameter

Type

Description

result

array

Array of argument type descriptors

Argument Types

Pure - Primitive type (u8, u64, bool, address, vector, etc.)
Object: ByValue - Object passed by value (consumed)
Object: ByImmutableReference - Immutable object reference
Object: ByMutableReference - Mutable object reference

Use Cases

Build transaction calls programmatically
Validate function parameters
Generate type-safe SDK code
Document smart contract interfaces

Error Handling

Error Code

Description

-32602

Invalid params - invalid package/module/function

-32603

Internal error - node issues

FunctionNotFound

Function does not exist

SDK Integration

sdk.ts

import { SuiClient } from '@mysten/sui/client';

const client = new SuiClient({ url: 'https://go.getblock.io/<ACCESS-TOKEN>/' });
const argTypes = await client.getMoveFunctionArgTypes({
  package: '0xa0a7b108f5023b7356f2c6a4be6f058e267aae38e08260c7d519d8641897490c',
  module: 'suifrens',
  function: 'mint'
});
console.log(argTypes);

sdk.rs

use sui_sdk::SuiClientBuilder;

#[tokio::main]
async fn main() -> Result<(), anyhow::Error> {
    let sui = SuiClientBuilder::default().build("https://go.getblock.io/<ACCESS-TOKEN>/").await?;
    let arg_types = sui.read_api().get_move_function_arg_types(
        "0xa0a7b108f5023b7356f2c6a4be6f058e267aae38e08260c7d519d8641897490c".parse()?,
        "suifrens",
        "mint"
    ).await?;
    println!("{:?}", arg_types);
    Ok(())
}

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