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public class Block {
public long nonce;
private long timestamp;
public String transactionData;
public String previousBlockHash;
public Block(String transactionData) {
nonce = 0;
timestamp = System.currentTimeMillis();
this.transactionData = transactionData;
}
public String getHash() throws NoSuchAlgorithmException {
return CryptoHelper.sha256(transactionData + String.valueOf(timestamp)
+ String.valueOf(previousBlockHash)
+ String.valueOf(nonce));
}
@Override
public String toString() {
return String.format("%s\t%d\t%d\t%s", previousBlockHash, timestamp, nonce, transactionData);
}
}
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