KyberTutorial001-Scenario3.java

    private void token2token(String tokenSymbolFrom, String tokenSymbolTo, String tokenQuantity) {
        //Suppose we want to convert 100 BAT to DAI tokens, which is a token to token conversion.
        // Note that ETH is used as the base pair i.e. BAT -> ETH -> DAI.
        Kyber3j kyber3j = Kyber3j.build(new KyberService(KyberService.KYBER_ROPSTEN));
        log.info("Connected to Kyber Network: "+KyberService.KYBER_ROPSTEN);
        try {
            Currencies currencies = kyber3j.currencies().send();
            if (!checkForError(currencies) && currencies.existsCurreny(tokenSymbolFrom)
                    && currencies.existsCurreny(tokenSymbolTo) ) {
                EnabledTokensForWallet tokens = kyber3j.enabledTokensForWallet(credentials.getAddress()).send();
                if (!checkForError(tokens)) {
                    // Check if wallet is enabled for tokens
                    String tokenId = currencies.getCurrency(tokenSymbolFrom).getId();
                    EnabledTokensForWallet.EnabledTokenStatus tokenStatus = tokens.getEnabledTokenStatus(tokenId);
                    if ( tokenStatus.isEnabled()) {
                        // Check if the sell token is already enabled to be sold by the network on behalf of this user
                        if (tokenStatus.getTxs_required() == 1) {
                            EnableTokenTransfer tokenData = kyber3j.enableTokenTransfer(credentials.getAddress(), tokenId,
                                    GasPriceRange.medium).send();
                            executeEthereumTransaction(tokenData.getData());
                        } else if (tokenStatus.getTxs_required() == 2) {
                            // TODO Implement validation
                            log.error("Not implemented for getTxs_required = 2");
                        }
                    } else {
                        log.error("Curreny not supported");
                        return;
                    }
                    // Get Sell Rate in ETH: <fromTokenQuantity> -> ETH ?
                    SellRate sellRate = kyber3j.sellRate(currencies.getCurrency(tokenSymbolFrom).getId(), tokenQuantity,
                            false).send();
                    if (!checkForError(sellRate)) {
                        Rates rates = sellRate.getData().get(0);
                        SingleRate singleRateFromToken = rates.getSingleRate(0);
                        Float sellQty = singleRateFromToken.getDst_qty();
                        log.info(tokenSymbolFrom+" Sell Rate: " + singleRateFromToken.getSrc_qty());
                        // Get Buy Rate for 1 toToken:  ETH ? -> 1 <toToken>
                        BuyRate buyRate = kyber3j.buyRate(currencies.getCurrency(tokenSymbolTo).getId(),"1",
                                false).send();
                        if (!checkForError(buyRate)) {
                            rates = buyRate.getData().get(0);
                            SingleRate singleRateToToken = rates.getSingleRate(0);
                            Float buyQty = singleRateToToken.getSrc_qty();
                            Float expectedAmountWithoutSlippage = sellQty / buyQty; // * Float.valueOf(tokenQuantity);
                            Float expectedAmountWithSlippage = expectedAmountWithoutSlippage * 0.97f;
                            singleRateFromToken.setDst_id(singleRateToToken.getDst_id());
                            singleRateFromToken.setDst_qty(expectedAmountWithSlippage);
                            TradeData tradeData = kyber3j.tradeData(credentials.getAddress(), singleRateFromToken, GasPriceRange.medium, nonce).send();
                            if (!checkForError(tradeData)) {
                                executeEthereumTransaction(tradeData.getData().get(0));
                            }
                        }
                    }
                }
            }
        } catch (Exception e){e.printStackTrace();}
    }