Part five #9
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# Conflicts: # src/blockchain/Block.java # src/blockchain/Blockchain.java # src/blockchain/Main.java # src/blockchain/miners/Miner.java
swsms
reviewed
Jan 9, 2019
swsms
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swsms
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A good implementation with a large number of Java features. You can also try using var from newer versions of the language.
| private List<T> data = List.of(); | ||
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| public Block(Integer id, Long minerId, String hashPreviousBlock, String hash, |
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Personally, I don’t really like constructors with a lot of arguments (3-4+) of the same (String, String) or almost the same types (Integer, Long). But you use builder below which can be added inside this class to hide the constructor.
| import java.io.Serializable; | ||
| import java.util.List; | ||
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| public class Block<T extends SignedData & Serializable> implements Serializable { |
| readLock.lock(); | ||
| return Stream.iterate("0", x -> "0") | ||
| .limit(prefixLength) | ||
| .reduce("", (x, y) -> x + y); |
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There is a reduce-like function joining for strings. You may try to use it.
| Block<T> prev = blocks.get(i - 1); | ||
| Block<T> cur = blocks.get(i); | ||
| Stream<T> concatData = Stream.concat( | ||
| Objects.requireNonNullElse(prev.getData(), new ArrayList<T>()).stream(), |
Nexgen90
reviewed
Feb 4, 2021
| do { | ||
| prefix = blockchain.getPrefix(); | ||
| magicNumber = random.nextInt(); | ||
| hash = StringUtil.applySha256(previousHash + magicNumber); |
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I don't understand why "Message" is not a part of hash?
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