# Java

### Requirements

JDK 11

### Accounts

#### Creation

**Create an account from seed**

```java
    import com.ltonetwork.client.core.AccountFactory;
    String seed = "my seed phrase";

    AccountFactory af = new AccountFactory('T');
    Account acc = af.seed(seed);
```

**Create an account from sign public key**

```java
    import com.ltonetwork.client.types.PublicKey;
    import com.ltonetwork.client.core.AccountFactory;

    PublicKey signPublicKey = new PublicKey("wJ4WH8dD88fSkNdFQRjaAhjFUZzZhV5yiDLDwNUnp6bYwRXrvWV8MJhQ9HL9uqMDG1n7XpTGZx7PafqaayQV8Rp", Encoding.BASE58);

    AccountFactory af = new AccountFactory('T');
    Account acc = af.createPublic(signPublicKey);
```

**Create an account from full info**

```java
    import com.ltonetwork.client.types.Key;
    import com.ltonetwork.client.types.KeyPair;
    import com.ltonetwork.client.core.AccountFactory;

    KeyPair signKeyPair = new KeyPair (
        new PublicKey("wJ4WH8dD88fSkNdFQRjaAhjFUZzZhV5yiDLDwNUnp6bYwRXrvWV8MJhQ9HL9uqMDG1n7XpTGZx7PafqaayQV8Rp", Encoding.BASE58),
        new PrivateKey("FkU1XyfrCftc4pQKXCrrDyRLSnifX1SMvmx1CYiiyB3Y", Encoding.BASE58),
        Key.KeyType.ED25519
    );

    KeyPair encryptKeyPair = new KeyPair (
        new PublicKey("BVv1ZuE3gKFa6krwWJQwEmrLYUESuUabNCXgYTmCoBt6", Encoding.BASE58),
        new PrivateKey("BnjFJJarge15FiqcxrB7Mzt68nseBXXR4LQ54qFBsWJN", Encoding.BASE58),
        Key.KeyType.CURVE25519
    );

    Address address = new Address("3JmCa4jLVv7Yn2XkCnBUGsa7WNFVEMxAfWe");

    AccountFactory af = new AccountFactory('T');
    Account acc = af.create(
        signKeyPair,
        encryptKeyPair,
        address);
```

Properties that are specified will be verified. Properties that are omitted will be generated where possible.

#### Signing (ED25519)

**Sign a message**

```java
    import com.ltonetwork.seasalt.sign.Signature;
    
    Signature sig = account.sign("my message");
```

**Verify a signature**

```java
    import com.ltonetwork.seasalt.sign.Signature;

    String message = "my message";
    Signature sig = account.sign(message);
    boolean isValid = account.verify(sig, message); // True
```

#### Encryption (X25519)

**Encrypt a message for another account**

```java
    String message = "my message";

    byte[] encrypted = senderAccount.encrypt(recipientAccount, message);
```

You can use `senderAccount.encrypt(senderAccount, message);` to encrypt a message for yourself.

**Decrypt a message received from another account**

```java
    String message = "my message";

    byte[] decrypted = recipientAccount.decrypt(senderAccount, message);
```

You can use `senderAccount.encrypt(senderAccount, message);` to decrypt a message from yourself.

### Public layer

```java
    PublicNode publicNode = new PublicNode(new URI("https://testnet.lto.network"), "myApiKey");

    int amount = 1000; // Amount of LTO to transfer
    Address recipient = new Address("3JmCa4jLVv7Yn2XkCnBUGsa7WNFVEMxAfWe");

    Transfer tx = new Transfer(amount, recipient);
    tx.signWith(myAccount);
    publicNode.broadcast(tx);
```


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