export async function updateAmount()

in payment-3p/src/updateAmount/index.ts [29:60]

23 lines of code
4 McCabe index (conditional complexity)


export async function updateAmount(client : DocumentClient, paymentToken: string, amount: number) : Promise<boolean | null> {
    try {
        // Retrieve the paymentToken from DynamoDB
        const response = await client.get({
            TableName: TABLE_NAME,
            Key: { paymentToken }
        }).promise();
        // If the paymentToken doesn't exist, we cannot update it.
        // Therefore, the operation fails.
        if (!response.Item)
            return false;

        // We can only update if the amount is less or equal to the current
        // amount for that paymentToken.
        if (response.Item.amount < amount)
            return false;

        // Update the amount.
        await client.put({
            TableName: TABLE_NAME,
            Item: {
                paymentToken: paymentToken,
                amount: amount
            }
        }).promise();
        return true;
        
    } catch (dbError) {
        console.log({"message": "Error updating the paymentToken in the database", "errormsg": dbError});
        return null;
    }
}