app.get('/multisig/:toaccount', (request, response) => {

    var pairSecond = StellarSdk.Keypair.random();

    server.loadAccount(pairMaster.publicKey()).then((account) => {
        var secondaryAddress = pairSecond.publicKey();

        var transaction = new StellarSdk.TransactionBuilder(account)
            .addOperation(StellarSdk.Operation.setOptions({
                signer: {
                    ed25519PublicKey: secondaryAddress,
                    weight: 1
                }
            }))
            .addOperation(StellarSdk.Operation.setOptions({
                masterWeight: 1, // set master key weight
                lowThreshold: 1,
                medThreshold: 2, // a payment is medium threshold
                highThreshold: 2 // make sure to have enough weight to add up to the high threshold!
            }))
            .build();

        transaction.sign(pairMaster); // only need to sign with the root signer as the 2nd signer won't be added to the account till after this transaction completes

        // now create a payment with the account that has two signers

        var transaction = new StellarSdk.TransactionBuilder(account)
            .addOperation(StellarSdk.Operation.payment({
                destination: StellarSdk.Keypair.fromSecret(request.params.toaccount).publicKey(),
                asset: StellarSdk.Asset.native(),
                amount: "2" // 2000 XLM
            }))
            .build();

        var secondKeypair = StellarSdk.Keypair.fromSecret(pairSecond.secret());

        // now we need to sign the transaction with both the root and the secondaryAddress
        transaction.sign(pairMaster);
        transaction.sign(secondKeypair);

        server.submitTransaction(transaction)
            .then(() => {
                response.send(request.params.amount + ' lumens sent to ' + pairTo.publicKey())
            })
            .catch((err) => {
                console.log(err.response.data.extras.result_codes);
                response.send('An error ocurred!')
            });
    });

});