Solana: BigInt error during transfer of NFTs

Solana: BigInt error during NFT transfer

As a Solana developer, you’ve likely encountered issues with transferring NFTs (non-fungible tokens) using the SPL-TOKEN program on your local Solana network. In this article, we’ll explore the cause and solution for a common issue that can arise during NFT transfers: BigInt errors.

The issue:

When transferring an NFT from one account to another, the transfer function may fail due to a BigInt (a type of large integer) mismatch between the two accounts. This can happen when the transfer function attempts to transfer the NFT without properly handling the transaction’s amount parameter.

The error:

Here’s an example of what the error might look like in your code:

const { Connection, PublicKey, Transaction, Keypair } = require('@solana/web3.js');

// Create a new key pair for the sender

const senderKeypair = Keypair.generate();

// Define the connection and keys for the SPL-TOKEN program

const connection = new Connection('

const splTokenProgramId = 'YOUR_SPL_TOKEN_PROGRAM_ID';

const splTokenAccountId = 'YOUR_SPL_TOKEN_ACCOUNT_ID';

// Create a transaction to transfer an NFT

const transaction = new Transaction()

.add(

[

// Set the transfer parameters

{

account0: splTokenAccountId,

amount: BigInt(1),

pubkey: splTokenProgramId.toPublicKey(),

pubkey: senderKeypair.publicKey.toBase58(),

},

],

);

// Try to transfer the NFT without error

transaction.sign(senderKeypair);

connection.sendTransaction(transaction);

// If this line returns an error, it means there was a BigInt mismatch

The solution:

To fix the BigInt error, you need to make sure that both accounts have sufficient balance and that the amount parameter is valid. Here are some steps to resolve the issue:

  • Check account balances: Make sure that both accounts have sufficient balances (BNA) for the transfer amount.
  • Validate the amount parameter: Verify that the amount value is a valid BigInt and does not exceed the maximum allowed value (e.g. 2^256 – 1).
  • Update transaction parameters:

    Change the amount parameter to a valid BigInt or update it to a smaller amount if necessary.

Here is an updated example that addresses these issues:

const { Connection, PublicKey, Transaction, Keypair } = require('@solana/web3.js');

// Create a new key pair for the sender

const senderKeypair = Keypair.generate();

// Define the connection and keys for the SPL-TOKEN program

const connection = new Connection('

const splTokenProgramId = 'YOUR_SPL_TOKEN_PROGRAM_ID';

const splTokenAccountId = 'YOUR_SPL_TOKEN_ACCOUNT_ID';

// Calculate the required amount in BigInts

const requiredAmount = 1n;

let availableBalance = splTokenAccountId.balances.get(splTokenAccountId.publicKey).amount;

// Check if there is enough balance for the transfer

if (availableBalance < requiredAmount) {

throw new Error('Insufficient balance');

}

// Create a transaction with the updated parameters

const transaction = new Transaction()

.add(

[

// Set the transfer parameters

{

account0: splTokenAccountId,

amount: BigInt(requiredAmount),

pubkey: splTokenProgramId.toPublicKey(),

pubkey: senderKeypair.publicKey.toBase58(),

},

],

);

// Try to transfer the NFT without error

transaction.sign(senderKeypair);

connection.sendTransaction(transaction);

// If this line does not throw an error, it means everything is valid

If you follow these steps and update your code accordingly, you should be able to resolve the BigInt error during NFT transfers.

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