KyberTutorial001-Scenario2.java

private void token2eth(String tokenSymbol, String tokenQuantity){
        Kyber3j kyber3j = Kyber3j.build(new KyberService(KyberService.KYBER_ROPSTEN));
        log.info("Connected to Kyber Network: "+KyberService.KYBER_ROPSTEN);
        try {
            // Check if token is supported
            Currencies currencies = kyber3j.currencies().send();
            if (!checkForError(currencies) && currencies.existsCurreny(tokenSymbol)) {
                EnabledTokensForWallet tokens = kyber3j.enabledTokensForWallet(credentials.getAddress()).send();
                if (!checkForError(tokens)){
                    // Check if wallet is enabled for token
                    String tokenId = currencies.getCurrency(tokenSymbol).getId();
                    EnabledTokensForWallet.EnabledTokenStatus tokenStatus = tokens.getEnabledTokenStatus(tokenId);
                    if ( tokenStatus.isEnabled()) {
                        if (tokenStatus.getTxs_required() == 1) {
                            // Enable Token Transfer
                            EnableTokenTransfer tokenData = kyber3j.enableTokenTransfer(credentials.getAddress(), tokenId,
                                    GasPriceRange.medium).send();
                            executeEthereumTransaction(tokenData.getData());
                        } 
                        SellRate sellRate = kyber3j.sellRate(currencies.getCurrency(tokenSymbol).getId(), tokenQuantity,
                                false).send();
                        if (!checkForError(sellRate)) {
                            Rates rates = sellRate.getData().get(0);
                            SingleRate singleRate = rates.getSingleRate(0);
                            log.info("Conversion Rate: " + singleRate.getSrc_qty());
                            singleRate.approximateReceivableToken(0.97);
                            TradeData tradeData = kyber3j.tradeData(credentials.getAddress(), singleRate, GasPriceRange.medium,nonce).send();
                            if (!checkForError(tradeData)) {
                                executeEthereumTransaction(tradeData.getData().get(0));
                            }
                        }
                    }
                }
            }
        } catch (Exception e){ e.printStackTrace(); }
    }