getFeeForMessage | Solana

POST /9de47db917d4f69168e3fed02217d15b

getFeeForMessage

cURL

curl --request POST \
  --url https://nd-326-444-187.p2pify.com/9de47db917d4f69168e3fed02217d15b \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "getFeeForMessage",
  "params": [
    "AQABA36MCIdgv94d3c8ywX8gm4JC7lKq8TH6zYjQ6ixtCwbyhwEgP0xzGjSa7QhxjYGUHwUPDgYsz9S8Mb/9c7ejFiwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIOnEi/spkCilDriqSI6o2AneB2xk65o4Xm9EM+yGyiPAQICAAEMAgAAAADKmjsAAAAA",
    {
      "commitment": "finalized"
    }
  ]
}
'

200

{
  "jsonrpc": "<string>",
  "id": 123,
  "result": 123
}

Solana getFeeForMessage method

The Solana getFeeForMessage method returns the fee in lamports that the cluster will charge to process the given message.

This method provides the cost of processing a message based on the current fee schedule. It is useful for estimating the cost of a transaction before it is submitted to the network.

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Parameters

• message — the message to calculate the fee for.

Response

• value — the fee in lamports that the cluster will charge to process the message.

Use case

A practical use case for getFeeForMessage is to estimate the cost of a transaction before it is submitted to the network. This can be useful for wallets or other applications that need to display or make use of this information.

Here’s a script to generate the message data for the 1 SOL transfer:

JavaScript

const web3 = require('@solana/web3.js');

async function createSerializedTransaction() {
    const connection = new web3.Connection(web3.clusterApiUrl('mainnet-beta'));

    let transaction = new web3.Transaction().add(
        web3.SystemProgram.transfer({
            fromPubkey: new web3.PublicKey('9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM'),
            toPubkey: new web3.PublicKey('A6132mRJy5zRmGsCCRbMsrbynuB9MRVgo3n6D5j49dBh'),
            lamports: web3.LAMPORTS_PER_SOL // This transfers 1 SOL.
        })
    );

    transaction.feePayer = transaction.instructions[0].keys[0].pubkey; // Set fee payer as the sender
    transaction.recentBlockhash = (await connection.getRecentBlockhash()).blockhash;

    // Serialize only the message part of the transaction
    return transaction.serializeMessage().toString('base64');
}

createSerializedTransaction().then(serializedMessage => {
    console.log(serializedMessage);
    // Use this output as the parameter in your getFeeForMessage call
});

Body

application/json

id · integer · default: 1

jsonrpc · string · default: 2.0

method · string · default: getFeeForMessage

params · (string | object)[]

The serialized message

Response

200 - application/json

Fee details

jsonrpc · string

id · integer

result · integer