java怎么实现Omni core USDT离线签名交易

本篇内容主要讲解"java怎么实现Omni core USDT离线签名交易 "，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"java怎么实现Omni core USDT离线签名交易 "吧!

背景：

1.主要是对区块链离线交易进行utxo上链。

2.对usdt地址下的全部币进行汇集交易，单独由btc进行手续费支付

一、对于如何查看一个unspent 交易：

1.调用钱包的 unspent接口

2.调用三方区块链浏览器的接口 例如：（blockchain : https://blockchain.info/unspent?active=35nNMpckrvuaryxFSiUd6jLvLGXJCWUyAY）

拿到钱包地址的unspentUTXO即可进行离线交易获取签名信息了 ，直接上代码：

        org.bitcoinj        bitcoinj-tools        0.14.7        org.bitcoinj        bitcoinj-examples        0.14.7        org.bitcoinj        bitcoinj-core        0.14.7

UnspentUtxo:

package com.bscoin.coldwallet.cointype.common; import java.io.Serializable; public class UnSpentUtxo implements Serializable {                    private static final long serialVersionUID = -7417428486644921613L;                private String hash; //未交易hash        private long txN;         private long value;//金额        private int height; //高度        private String script;//签名        private String address;//钱包地址                public String getHash() {                return hash;        }        public void setHash(String hash) {                this.hash = hash;        }        public long getTxN() {                return txN;        }        public void setTxN(long txN) {                this.txN = txN;        }        public long getValue() {                return value;        }        public void setValue(long value) {                this.value = value;        }        public int getHeight() {                return height;        }        public void setHeight(int height) {                this.height = height;        }        public String getScript() {                return script;        }        public void setScript(String script) {                this.script = script;        }        public String getAddress() {                return address;        }        public void setAddress(String address) {                this.address = address;        }        }

Transaction:

package com.bscoin.coldwallet.cointype.usdt; import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map; import org.apache.commons.codec.binary.Hex;import org.apache.commons.configuration2.Configuration;import org.bitcoinj.core.Address;import org.bitcoinj.core.AddressFormatException;import org.bitcoinj.core.Coin;import org.bitcoinj.core.Context;import org.bitcoinj.core.DumpedPrivateKey;import org.bitcoinj.core.ECKey;import org.bitcoinj.core.NetworkParameters;import org.bitcoinj.core.ScriptException;import org.bitcoinj.core.Sha256Hash;import org.bitcoinj.core.Transaction;import org.bitcoinj.core.TransactionOutPoint;import org.bitcoinj.core.UTXO;import org.bitcoinj.core.Utils;import org.bitcoinj.params.MainNetParams;import org.bitcoinj.params.TestNet3Params;import org.bitcoinj.script.Script;import org.slf4j.Logger;import org.slf4j.LoggerFactory; import com.alibaba.fastjson.JSON;import com.bscoin.coldwallet.cointype.common.ConfigUtil;import com.bscoin.coldwallet.cointype.common.UnSpentUtxo; import org.bitcoinj.core.TransactionConfidence;   /**      * @ClassName: RawTransaction      * @author DHing      *    */  public class RawTransaction {                private static Logger LOG = LoggerFactory.getLogger(RawTransaction.class);        static NetworkParameters params;                static {                try {                        Configuration config = ConfigUtil.getInstance();                        params = config.getBoolean("usdtcoin.testnet") ? TestNet3Params.get() : MainNetParams.get();                        LOG.info("=== [USDT] usdtcoin  client networkID：{} ===", params.getId());                } catch (Exception e) {                        LOG.info("=== [USDT] com.bscoin.coldwallet.cointype.usdt.RawTransaction:{} ===", e.getMessage(), e);                }        }                                        /**              * @Title: createRawTransaction              * @param @param privBtcKey   btc私钥            * @param @param btcAddress  比特币地址            * @param @param privUsdtKey  usdt私钥            * @param @param recevieUsdtAddr  usdt接收地址            * @param @param formUsdtAddr  发送的usdt地址            * @param @param fee 手续费            * @param @param omniHex - usdt hex       * @param @param unBtcUtxos - btc utxo            * @param @param unUsdtUtxos - usdt utxo             * @param @return    参数              * @return String    返回类型              * @throws         */        public static String createRawTransaction(String privBtcKey, String btcAddress, String privUsdtKey, String recevieUsdtAddr, String formUsdtAddr, long fee, String omniHex, List unBtcUtxos, List unUsdtUtxos) {                List btcUtxos = new ArrayList();                List usdtUtxos = new ArrayList();                try {                        if (!unBtcUtxos.isEmpty() && !unUsdtUtxos.isEmpty()) {                                        // find a btc eckey info                                        DumpedPrivateKey btcPrivateKey = DumpedPrivateKey.fromBase58(params, privBtcKey);                                        ECKey btcKey = btcPrivateKey.getKey();                                        // a usdt eckey info                                        DumpedPrivateKey usdtPrivateKey = DumpedPrivateKey.fromBase58(params, privUsdtKey);                                        ECKey usdtKey = usdtPrivateKey.getKey();                                                                                // receive address                                        Address receiveAddress = Address.fromBase58(params, recevieUsdtAddr);                                        // create a transaction                                        Transaction tx = new Transaction(params);                                        // odd address                                        Address oddAddress = Address.fromBase58(params, btcAddress);                                        // 如果需要找零 消费列表总金额 - 已经转账的金额 - 手续费                                        long value_btc = unBtcUtxos.stream().mapToLong(UnSpentUtxo::getValue).sum();                                        long value_usdt = unUsdtUtxos.stream().mapToLong(UnSpentUtxo::getValue).sum();                                        // 总输入 - 手续费 - 546 -546 = 找零金额                                        long leave = (value_btc + value_usdt) - fee - 1092;                                        if (leave > 0) {                                                tx.addOutput(Coin.valueOf(leave), oddAddress);                                        }                                                                                // usdt transaction                                        tx.addOutput(Coin.valueOf(546), newScript(Utils.HEX.decode(omniHex)));                                        // send to address                                        tx.addOutput(Coin.valueOf(546), receiveAddress);                                                                                // btc utxos is an array of inputs from my wallet                                        for (UnSpentUtxo unUtxo : unBtcUtxos) {                                                btcUtxos.add(new UTXO(Sha256Hash.wrap(unUtxo.getHash()), unUtxo.getTxN(), Coin.valueOf(unUtxo.getValue()), unUtxo.getHeight(), false, newScript(Utils.HEX.decode(unUtxo.getScript())), unUtxo.getAddress()));                                        }                                        // usdt utxos is an array of inputs from my wallet                                        for (UnSpentUtxo unUtxo : unUsdtUtxos) {                                                usdtUtxos.add(new UTXO(Sha256Hash.wrap(unUtxo.getHash()), unUtxo.getTxN(), Coin.valueOf(unUtxo.getValue()), unUtxo.getHeight(), false, newScript(Utils.HEX.decode(unUtxo.getScript())), unUtxo.getAddress()));                                        }                                                                                // create usdt utxo data                                        for (UTXO utxo : usdtUtxos) {                                                TransactionOutPoint outPoint = new TransactionOutPoint(params, utxo.getIndex(), utxo.getHash());                                                tx.addSignedInput(outPoint, utxo.getScript(), usdtKey, Transaction.SigHash.ALL, true);                                        }                                                                                // create btc utxo data                                        for (UTXO utxo : btcUtxos) {                                                TransactionOutPoint outPoint = new TransactionOutPoint(params, utxo.getIndex(), utxo.getHash());                                                tx.addSignedInput(outPoint, utxo.getScript(), btcKey, Transaction.SigHash.ALL, true);                                        }                                                                                Context context = new Context(params);                                        tx.getConfidence().setSource(TransactionConfidence.Source.NETWORK);                                        tx.setPurpose(Transaction.Purpose.USER_PAYMENT);                                                                                LOG.info("=== [USDT] sign success,hash is :{} ===", tx.getHashAsString());                                        return new String(Hex.encodeHex(tx.bitcoinSerialize()));                        }                } catch (Exception e) {                        LOG.info("=== com.bscoin.coldwallet.cointype.usdt.RawTransaction.createRawTransaction(String, String, String, String, String, long, String, List, List):{}  ===",                                                   e.getMessage(), e);                }                return null;        }                public static void main(String[] args) {                Map m = new HashMap();                List us = new ArrayList();                UnSpentUtxo u = new UnSpentUtxo();                u.setAddress("mvEtuEqYPMrLaKjJ5nTZ57vQAoYUtVmMaQ");                u.setHash("d235e908767d4bbf579e04ae768fa16298c8ccb2dc406f1cda90341477ccbb3f");                u.setHeight(1413239);                u.setScript("76a914a1806613a51a81966779e2fa1537013cf4cd2b1788ac");                u.setTxN(0);                u.setValue(300000);                                UnSpentUtxo u1 = new UnSpentUtxo();                u1.setAddress("mvEtuEqYPMrLaKjJ5nTZ57vQAoYUtVmMaQ");                u1.setHash("d74b16fd8e548e467bd1f4ce1214037fc6087bb7bf4f15cfa684d03d1cb2eda4");                u1.setHeight(1413334);                u1.setScript("76a914a1806613a51a81966779e2fa1537013cf4cd2b1788ac");                u1.setTxN(1);                u1.setValue(300000);                                us.add(u);                us.add(u1);                                List us2 = new ArrayList();                UnSpentUtxo u3 = new UnSpentUtxo();                u3.setAddress("moUseQWZenTkU3a2bCZydth4CUUZqNY6Fk");                u3.setHash("bd6da7714f1eb5f36e62070bc8463f8d574b98083a0df872285d291417b3afe3");                u3.setHeight(1413334);                u3.setScript("76a914575c4b21030d58d02c434fc36f66a866142e74ce88ac");                u3.setTxN(1);                u3.setValue(546);                us2.add(u3);                                m.put("btcUtxo", us);                m.put("usdtUtxo", us2);                m.put("omniHex", "6a146f6d6e6900000000000000010000000059682f00");                                System.out.println("传输参数：">

获取OmniHex:

调用RPC： get_balance 、 omni_createpayload_simplesend 、 omni_createrawtx_opreturn

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