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110
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1 package christie.blockchain;
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2
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3 import java.io.ByteArrayOutputStream;
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4 import java.io.IOException;
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5 import java.math.BigInteger;
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6
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7 // インターフェイスにしたほうがいいかもしれない. 後からdataの内容変える可能性がある.
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8 public class Transaction {
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9 private byte[] hash;
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10
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11 private long nonce;
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12
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13 private byte[] sendAddress;
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14
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15 private byte[] receiveAddress;
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16
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17 private byte[] data;
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18
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19 private long timestamp;
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20
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21 private byte[] signature;
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22
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23 //public ArrayList<TransactionInput> inputs = new ArrayList<TransactionInput>();
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24 //public ArrayList<TransactionOutput> outputs = new ArrayList<TransactionOutput>();
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25
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26
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27 public Transaction(byte[] sendAddress, byte[] receiveAddress, byte[] data){
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28 this.sendAddress = sendAddress;
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29 this.receiveAddress = receiveAddress;
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30 this.data = data;
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31
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32 }
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33 /*
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34 public Transaction(byte[] from, byte[] to, byte[] value, ArrayList<TransactionInput> inputs) {
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35 this.sendAddress = from;
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36 this.receiveAddress = to;
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37 this.value = value;
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38 this.inputs = inputs;
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39 }
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40 */
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41 public byte[] calcHash(){
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42 HashUtil hashUtil = new HashUtil();
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43
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44 byte[] timestampByte = BigInteger.valueOf(this.timestamp).toByteArray();
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45
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46 byte[] nonceByte = BigInteger.valueOf(this.nonce).toByteArray();
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47
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48 ByteArrayOutputStream output = new ByteArrayOutputStream();
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49
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50 try {
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51 output.write(hash);
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52 output.write(timestampByte);
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53 output.write(nonceByte);
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54 } catch (IOException e) {
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55 e.printStackTrace();
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56 }
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57
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58 return hashUtil.sha256(output.toByteArray());
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59
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60 }
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61
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62 }
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