add cash to wallet

wallet.dart

function addMoneyToWallet(userDataTransactionsOrderId, data) {
    let serviceFeeCal = Math.ceil(parseInt(data.data().amountToPay.toString()) * 0.05)
    let netAmount = parseInt(data.data().amountToPay.toString()) - serviceFeeCal
    console.log(`WALLET -------------------${serviceFeeCal} -- ${netAmount} - ${JSON.stringify(data.data())}`)
    admin.firestore().collection("wallet").doc(data.data().recepientId.toString()).collection("transactions").add(
        {
            tenancyTransactionId: userDataTransactionsOrderId,
            date: data.data().payedDate,
            hash: "Genesis",
            prevHash: "PrevHash",
            gross: data.data().amountToPay.toString(),
            serviceRate: "5%",
            serviceFee: serviceFeeCal.toString(),
            net: netAmount.toString(),
            transactionType: "Deposit",

        }).then((result) => {
            console.log(`TRANSACTION ADD RESULTS -------------${JSON.stringify( result.data)}`)
        admin.firestore().collection("wallet").doc(data.data().recepientId.toString()).get().then((query) => {
            if (!query.exists) {
                //creat a wallet
                admin.firestore().collection("wallet").doc(data.data().recepientId.toString()).set(
                    {
                        tenancyTransactionId: userDataTransactionsOrderId,
                        updatedOn: "updated on", //to add da
                        net: netAmount.toString(),
                        prevHash: "result.data().hash",
                        hash: "GenesisWalletHash",
                        lastTransactionId: result.id
                    }
                ).catch((e) => console.log(`Error Adding data to wallet${e}`));

            } else {
                let walletAmount = query.data().net
                let  newWallet =  netAmount + parseInt(walletAmount)
                //update existing wallet
                admin.firestore().collection("wallet").doc(data.data().recepientId.toString()).update(
                    {
                        tenancyTransactionId: userDataTransactionsOrderId,
                        updatedOn:" result.data().payedDate",
                        net: newWallet.toString(),
                        prevHash: "result.data().hash",
                        hash: "GenesisWalletHash",
                        lastTransactionId: result.id
                    }
                ).catch((e) => console.log(`Error Adding data to wallet${e}`));
            }

        })
        console.log('Creating Wallet')
        sendNotification('money added', 'Your  Wallet account has been credited.', data.data().recepientId.toString(), 'wallet')
    }).catch((e) => console.log(`Error Adding data to wallet${e}`));

}