ShufflingCreate.java

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 * Copyright © 2013-2016 The Nxt Core Developers.                             *
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 * See the AUTHORS.txt, DEVELOPER-AGREEMENT.txt and LICENSE.txt files at      *
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 * Nxt software, including this file, may be copied, modified, propagated,    *
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package nxt.http;

import nxt.Account;
import nxt.Attachment;
import nxt.Constants;
import nxt.HoldingType;
import nxt.NxtException;
import org.json.simple.JSONStreamAware;

import javax.servlet.http.HttpServletRequest;

public final class ShufflingCreate extends CreateTransaction {

    static final ShufflingCreate instance = new ShufflingCreate();

    private ShufflingCreate() {
        super(new APITag[] {APITag.SHUFFLING, APITag.CREATE_TRANSACTION},
                "holding", "holdingType", "amount", "participantCount", "registrationPeriod");
    }

    @Override
    JSONStreamAware processRequest(HttpServletRequest req) throws NxtException {
        HoldingType holdingType = HoldingType.get(ParameterParser.getByte(req, "holdingType", (byte) 0, (byte) 2, false));
        long amount = ParameterParser.getLong(req, "amount", holdingType == HoldingType.NXT ? Constants.SHUFFLING_DEPOSIT_NQT : 1L,
                Long.MAX_VALUE, true);
        long holdingId = ParameterParser.getUnsignedLong(req, "holding", holdingType != HoldingType.NXT);
        if (holdingType == HoldingType.NXT && holdingId != 0) {
            return JSONResponses.incorrect("holding", "holding only used for currency or asset shuffling");
        }
        byte participantCount = ParameterParser.getByte(req, "participantCount", Constants.MIN_NUMBER_OF_SHUFFLING_PARTICIPANTS,
                Constants.MAX_NUMBER_OF_SHUFFLING_PARTICIPANTS, true);
        short registrationPeriod = (short)ParameterParser.getInt(req, "registrationPeriod", 0, Constants.MAX_SHUFFLING_REGISTRATION_PERIOD, true);
        Attachment attachment = new Attachment.ShufflingCreation(holdingId, holdingType, amount, participantCount, registrationPeriod);
        Account account = ParameterParser.getSenderAccount(req);
        if (account.getControls().contains(Account.ControlType.PHASING_ONLY)) {
            return JSONResponses.error("Accounts under phasing only control cannot start a shuffling");
        }
        try {
            return createTransaction(req, account, attachment);
        } catch (NxtException.InsufficientBalanceException e) {
            return JSONResponses.notEnoughHolding(holdingType);
        }
    }
}