ErgoPayRoundTrip.java

    @GetMapping("/roundTrip/{address}")
    public ErgoPayResponse roundTrip(@PathVariable String address) {
        // sends 1 ERG around to and from the address

        ErgoPayResponse response = new ErgoPayResponse();

        try {
            boolean isMainNet = isMainNetAddress(address);
            long amountToSend = 1000L * 1000L * 1000L;
            Address sender = Address.create(address);
            Address recipient = Address.create(address);

            byte[] reduced = getReducedSendTx(isMainNet, amountToSend, sender, recipient).toBytes();

            response.reducedTx = Base64.getUrlEncoder().encodeToString(reduced);
            response.address = address;
            response.message = "Here is your 1 ERG round trip.";
            response.messageSeverity = ErgoPayResponse.Severity.INFORMATION;

        } catch (Throwable t) {
            response.messageSeverity = ErgoPayResponse.Severity.ERROR;
            response.message = (t.getMessage());
        }

        return response;
    }