Solana: BigInt error when transferring NFTs

Solana: BigInt error during NFT transfer

As a Solana developer, you’ve probably encountered issues when transferring NFTs (non-functional 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 occur during NFT transfers: BigInt errors.

Issue:

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

Error:

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

`javascript

Solution:
To fix the BigInt error, you need to make sure that both accounts have sufficient balance and 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.

Check the "amount" parameter: Verify that the "amount" value is a valid BigInt value 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:
`javascript
const { connection, publickey, transaction, keypair } = require('@solana/web3.js');
// Create a new keypair 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 available balance for the transfer
if (availableBalance < requiredAmount) {
throw new Error('Insufficient Balance');
}
// Create a transaction with updated parameters
constant transaction = new Transaction()
.add(
[
// Set the transfer parameters
{
account0: splTokenAccountId,
amount: BigInt (required amount),
public key: splTokenProgramId.toPublicKey(),
public key: senderKeypair.publicKey.toBase58(),
},
],
);
// Attempt to transfer NFT without error
transaction.sign(sender keypair);
connection.sendTransaction(transaction);
// If this line does not throw any 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.