package christie.blockchain;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;

// 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.
public class Transaction {
    private byte[] hash;

    private long nonce;

    private byte[] sendAddress;

    private byte[] receiveAddress;

    private byte[] data;

    private long timestamp;

    private byte[] signature;

    //public ArrayList<TransactionInput> inputs = new ArrayList<TransactionInput>();
    //public ArrayList<TransactionOutput> outputs = new ArrayList<TransactionOutput>();


    public Transaction(byte[] sendAddress, byte[] receiveAddress, byte[] data){
        this.sendAddress = sendAddress;
        this.receiveAddress = receiveAddress;
        this.data = data;

    }
/*
    public Transaction(byte[] from, byte[] to, byte[] value,  ArrayList<TransactionInput> inputs) {
        this.sendAddress = from;
        this.receiveAddress = to;
        this.value = value;
        this.inputs = inputs;
    }
*/
    public byte[] calcHash(){
        HashUtil hashUtil = new HashUtil();

        byte[] timestampByte = BigInteger.valueOf(this.timestamp).toByteArray();

        byte[] nonceByte = BigInteger.valueOf(this.nonce).toByteArray();

        ByteArrayOutputStream output = new ByteArrayOutputStream();

        try {
            output.write(hash);
            output.write(timestampByte);
            output.write(nonceByte);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return hashUtil.sha256(output.toByteArray());

    }

}