object of solana transaction

Hello all, Pretty new to Solana I have a question how can I get the transaction amount, I was told to use the PostBalances and preBalances, but not really sure how to go about it. any help would be appreciated

  • what do you mean by transaction amount ? fee ? transfer amount ?
    – vicyyn
    Aug 24, 2022 at 9:25
  • transfer amount Aug 24, 2022 at 9:28

1 Answer 1


In Solana network values shared are called lamport. Subtraction will give you lamport value.

    const LAMPORT = 0.000000001; // SOL
let transactionInfo = await connection.getTransaction(signature);
        console.log('transactionInfo', JSON.stringify(transactionInfo));
        const transactionMeta = transactionInfo.meta;
let lamportsSent = transactionMeta.postBalances[0] - transactionMeta.preBalances[0];
lamportsSent =  Math.abs(lamportsSent);
        const solanaSent = lamportsSent * LAMPORT;

For reference https://docs.solana.com/integrations/exchange#versioned-transaction-migration

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