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ETH2KNC Kyber Swap
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private void eth2knc() { | |
Kyber3j kyber3j = Kyber3j.build(new KyberService(KyberService.KYBER_ROPSTEN)); | |
log.info("Connected to Kyber Network: "+KyberService.KYBER_ROPSTEN); | |
// Buy KNC from ETH | |
try { | |
// Check if token is supported | |
Currencies currencies = kyber3j.currencies().send(); | |
log.info("Exists Currency KNC: " + currencies.existsCurreny("KNC")); | |
if (!checkForError(currencies) && currencies.existsCurreny("KNC")) { | |
// Get buy rates | |
BuyRate buyRate = kyber3j.buyRate(currencies.getCurrency("KNC").getId(),"1", | |
false).send(); | |
if (!checkForError(buyRate)) { | |
Rates rates = buyRate.getData().get(0); | |
SingleRate singleRate = rates.getSingleRate(0); | |
log.info("Conversion Rates: " + singleRate.getSrc_qty()); | |
// Get tradeData | |
// Adjust conversion rates to 97% | |
singleRate.approximateReceivableToken(0.97); | |
TradeData tradeData = kyber3j.tradeData(credentials.getAddress(), singleRate, GasPriceRange.medium).send(); | |
if (!checkForError(tradeData)) { | |
TradeData.TradeDataRecord rec = tradeData.getData().get(0); | |
RawTransaction rawTransaction = RawTransaction.createTransaction( | |
rec.getNonceAsBI(), rec.getGasPriceAsBI(), rec.getGasLimitAsBI(), | |
rec.getTo(), rec.getValueAsBI(), rec.getData()); | |
byte[] signedMessage = TransactionEncoder.signMessage(rawTransaction, credentials); | |
String hexValue = Numeric.toHexString(signedMessage); | |
log.info("Signe Message with Hex Value: "+hexValue); | |
//EthSendTransaction ethTrx = web3j.ethSendRawTransaction(hexValue).send(); | |
EthSendTransaction ethSendTransaction = web3j.ethSendRawTransaction(hexValue).sendAsync().get(); | |
log.info("Executed transaction "+ethSendTransaction.getTransactionHash()); | |
// poll for transaction response via org.web3j.protocol.Web3j.ethGetTransactionReceipt(<txHash>) | |
return; | |
} | |
} | |
} | |
} catch (Exception e) { | |
e.printStackTrace(); | |
} | |
} |
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