Kyber Swap Example: Token2ETH

Token2ETH.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();
                // Check if wallet is enabled for token
                String tokenId = currencies.getCurrency(tokenSymbol).getId();
                EnabledTokensForWallet.EnabledTokenStatus tokenStatus = tokens.getEnabledTokenStatus(tokenId);
                if (!checkForError(tokens) && tokenStatus.isEnabled()) {
                    if (tokenStatus.getTxs_required() ==  1) {
                        // Enable Token Transfer
                        // https://developer.kyber.network/docs/Integrations-RESTfulAPIGuide/#check-and-approve-bat-token-contract
                        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");
                    }
                    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 Rates: " + singleRate.getSrc_qty());
                        singleRate.approximateReceivableToken(0.97);
                        TradeData tradeData = kyber3j.tradeData(credentials.getAddress(), singleRate, GasPriceRange.medium).send();
                        if (!checkForError(tradeData)) {
                            executeEthereumTransaction(tradeData.getData().get(0));
                        }
                    }
                }
            }
        } catch (Exception e){ e.printStackTrace(); }
    }